JAC S2. Engine. Service Manual - part 1

                                                                                                                                                     

Content

 

Content                                                                                                                                                                                         1 

Content 

Engine Mechanical System ......................................................................................................................... 14

 

I. Summary ............................................................................................................................................... 14

 

(I) structure overview ........................................................................................................................... 14

 

(II) System theory ................................................................................................................................. 14

 

(III)technical parameters、maintenance parameters ............................................................................ 16

 

(IV)Torque parameter ........................................................................................................................... 20

 

(V)Precautions of maintenance ............................................................................................................ 23

 

(VI)Special tool .................................................................................................................................... 26

 

(I)Diagnosis analysis table ................................................................................................................... 29

 

(II)diagnose flow chart ......................................................................................................................... 32

 

III、Alternator belt .................................................................................................................................. 36

 

(I)Disassembly ...................................................................................................................................... 36

 

(II)Check .............................................................................................................................................. 36

 

(III)Installation ..................................................................................................................................... 36

 

IV、Cylinder cover shield component .................................................................................................... 37

 

(I)Disassembly ...................................................................................................................................... 37

 

(II)Installation ....................................................................................................................................... 37

 

V、engine assembly ................................................................................................................................ 39

 

(I)Disassembly ...................................................................................................................................... 39

 

(II)Installation ....................................................................................................................................... 21

 

VI、Idle wheel ......................................................................................................................................... 23

 

(I)Disassembly ...................................................................................................................................... 23

 

(II)Installation ....................................................................................................................................... 23

 

VII、Crankshaft pulley............................................................................................................................ 24

 

(I)Disassembly ...................................................................................................................................... 24

 

(II)Installation ....................................................................................................................................... 25

 

                                                                                                                                                     

Content

 

Content                                                                                                                                                                                         2 

VIII、Flywheel component ..................................................................................................................... 27

 

(I)Disassembly ...................................................................................................................................... 27

 

(II)Installation ....................................................................................................................................... 28

 

IX、Crankshaft rear oil seal and cover plate ........................................................................................... 29

 

(I)Disassembly ...................................................................................................................................... 29

 

(II)Installation ....................................................................................................................................... 29

 

X、Crankshaft front oil seal .................................................................................................................... 31

 

(I)Disassembly ...................................................................................................................................... 31

 

(II)Installation ....................................................................................................................................... 32

 

XI、Timing chain .................................................................................................................................... 33

 

(I)Disassembly ...................................................................................................................................... 33

 

(II)Installation ....................................................................................................................................... 35

 

XII、camshaft .......................................................................................................................................... 38

 

(I)Disassembly ...................................................................................................................................... 38

 

(II)Check .............................................................................................................................................. 40

 

(III)Installation ..................................................................................................................................... 40

 

XIII、Cylinder cover assembly ............................................................................................................... 44

 

(I)Disassemble ...................................................................................................................................... 44

 

(II)Check .............................................................................................................................................. 46

 

(III)Installation ..................................................................................................................................... 48

 

XIV、Cylinder assembly ......................................................................................................................... 50

 

(I)Disassemble ...................................................................................................................................... 50

 

(II)Check .............................................................................................................................................. 53

 

Engine lubricating system ........................................................................................................................... 62

 

I. Overview............................................................................................................................................... 62

 

(I) Structure overview .......................................................................................................................... 62

 

(II) System principle ............................................................................................................................. 62

 

                                                                                                                                                     

Content

 

Content                                                                                                                                                                                         3 

(IV) Torque parameters ........................................................................................................................ 64

 

II. Failure diagnosis.................................................................................................................................. 64

 

(I.) Diagnosis analysis table ................................................................................................................. 64

 

(II) Diagnosis procedures table ............................................................................................................ 65

 

Engine oil over-consumption ................................................................................................................... 65

 

III. Engine oil drainage and filling ........................................................................................................... 65

 

IV. Engine oil pressure switch ................................................................................................................. 67

 

(I) Dismantlement ................................................................................................................................. 67

 

(II) Installation ...................................................................................................................................... 68

 

V. Oil filter ............................................................................................................................................... 69

 

(I) Disassembly ..................................................................................................................................... 69

 

(II) Installation ...................................................................................................................................... 70

 

VI. Oil filter components ......................................................................................................................... 71

 

(I) Disassembly ..................................................................................................................................... 71

 

(II) Installation ...................................................................................................................................... 71

 

VII. Oil sump assy ................................................................................................................................... 72

 

(I) Disassembly ..................................................................................................................................... 72

 

(II) Installation ...................................................................................................................................... 73

 

VIII. Suction filter .................................................................................................................................... 74

 

(I) Disassembly ..................................................................................................................................... 74

 

(II) Installation ...................................................................................................................................... 74

 

IX. Engine oil dipstick tube components ................................................................................................. 75

 

(I) Disassembly ..................................................................................................................................... 75

 

(II) Installation ...................................................................................................................................... 76

 

X. Oil pump assy ...................................................................................................................................... 77

 

(I) Disassembly ..................................................................................................................................... 77

 

(II) Installation ...................................................................................................................................... 79

 

                                                                                                                                                     

Content

 

Content                                                                                                                                                                                         4 

Engine cooling system ................................................................................................................................. 83

 

I

、Summary ............................................................................................................................................. 83

 

(I)structure overview ............................................................................................................................ 83

 

(II)system principle .............................................................................................................................. 83

 

(III)Technical parameter、maintenance parameter ............................................................................. 84

 

(IV)Torque parameter ........................................................................................................................... 85

 

II、Fault diagnosis ................................................................................................................................... 85

 

(I)Fault diagnosis table ......................................................................................................................... 85

 

(II)Flow scheme of diagnosis ............................................................................................................... 87

 

III、Expansion kettle assembly ............................................................................................................... 91

 

(I)Disassembly ...................................................................................................................................... 91

 

(II)Installation ....................................................................................................................................... 92

 

IV、Replace cooling liquid ..................................................................................................................... 93

 

(I)Disassembly ...................................................................................................................................... 93

 

(II)Installation ....................................................................................................................................... 93

 

V、Radiator venting hose ........................................................................................................................ 95

 

(I)Disassembly ...................................................................................................................................... 95

 

(II)Installation ....................................................................................................................................... 95

 

VI、Radiator fan assembly ...................................................................................................................... 97

 

(I)Disassembly ...................................................................................................................................... 97

 

(II)Check radiator fan assembly ........................................................................................................... 98

 

(III)Installation ..................................................................................................................................... 98

 

VII、Radiator assembly ........................................................................................................................ 100

 

(I)Disassembly .................................................................................................................................... 100

 

(II)Check ............................................................................................................................................ 100

 

(III)Installation ................................................................................................................................... 101

 

VIII、Water exhaust pipe and pipe clamp assembly............................................................................. 102

 

                                                                                                                                                     

Content

 

Content                                                                                                                                                                                         5 

(I)Disassembly .................................................................................................................................... 102

 

(II)Installation ..................................................................................................................................... 103

 

IX、Water intake pipe and pipe clamp assembly .................................................................................. 104

 

(I)Disassembly .................................................................................................................................... 104

 

(II)Installation ..................................................................................................................................... 104

 

X、inlet of water pump ......................................................................................................................... 106

 

(I)Disassembly .................................................................................................................................... 106

 

(II)Check ............................................................................................................................................ 106

 

(III)Installation ................................................................................................................................... 108

 

XI、Pulley of water pump ..................................................................................................................... 109

 

(I)Disassembly .................................................................................................................................... 109

 

(II)Installation ..................................................................................................................................... 110

 

XII、water pump ................................................................................................................................... 111

 

(I)Disassembly .................................................................................................................................... 111

 

(II)Check ............................................................................................................................................ 111

 

(III)Installation ................................................................................................................................... 112

 

XIII、warm wind backwater steel tube ................................................................................................. 113

 

(I)Disassembly .................................................................................................................................... 113

 

(II)Installation ..................................................................................................................................... 114

 

Engine intake system ................................................................................................................................. 115

 

I

、Summary ........................................................................................................................................... 115

 

(I)structure overview .......................................................................................................................... 115

 

(II)system principle ............................................................................................................................ 115

 

(III)torque parameter .......................................................................................................................... 115

 

(IV)Fault diagnosis ............................................................................................................................. 115

 

II、Intake manifold assembly ................................................................................................................ 117

 

(I)Disassembly .................................................................................................................................... 117

 

                                                                                                                                                     

Content

 

Content                                                                                                                                                                                         6 

(II)Installation ..................................................................................................................................... 118

 

III、Air filter assembly .......................................................................................................................... 119

 

(I)Disassembly .................................................................................................................................... 119

 

(II) Disassembly ................................................................................................................................. 120

 

(III)Check ........................................................................................................................................... 120

 

(IV)Assembly again ........................................................................................................................... 120

 

(V)Installation .................................................................................................................................... 120

 

IV、Air filter exhaust pipe assembly .................................................................................................... 122

 

(I)Disassembly .................................................................................................................................... 122

 

(II) Check ........................................................................................................................................... 122

 

(III) Installation .................................................................................................................................. 123

 

V、Air filter bracket .............................................................................................................................. 124

 

(I) Disassembly ................................................................................................................................... 124

 

(II) Installation .................................................................................................................................... 124

 

VI、Intake manifold .............................................................................................................................. 127

 

(I)Disassembly .................................................................................................................................... 127

 

(II)Check ............................................................................................................................................ 128

 

(III)Installation ................................................................................................................................... 128

 

Engine exhaust system ............................................................................................................................... 131

 

I

、Summary ........................................................................................................................................... 131

 

(I)structure overview .......................................................................................................................... 131

 

(II)torque parameter ........................................................................................................................... 133

 

II、Front exhaust pipe assembly ........................................................................................................... 133

 

(I) Disassembly ................................................................................................................................... 133

 

(II)Installation ..................................................................................................................................... 134

 

III、II level catalyst assembly ............................................................................................................... 137

 

(I)Disassembly .................................................................................................................................... 137

 

                                                                                                                                                     

Content

 

Content                                                                                                                                                                                         7 

(II)Installation ..................................................................................................................................... 138

 

IV、I level muffler assembly ................................................................................................................ 139

 

(I)Disassembly .................................................................................................................................... 139

 

(II)Installation ..................................................................................................................................... 139

 

V、II level muffler assembly ................................................................................................................ 142

 

(I)Disassembly .................................................................................................................................... 142

 

(II)Installation ..................................................................................................................................... 143

 

VI、Thermal baffle assembly ................................................................................................................ 144

 

(I)Disassembly .................................................................................................................................... 144

 

VII、Exhaust manifold .......................................................................................................................... 147

 

(I)Disassembly .................................................................................................................................... 147

 

(II)Check ............................................................................................................................................ 148

 

(III)Installation ................................................................................................................................... 148

 

Engine fuel system ..................................................................................................................................... 150

 

I. Overview............................................................................................................................................. 150

 

(I.) Structure overview ....................................................................................................................... 150

 

(II) System theory ............................................................................................................................... 151

 

(III) Torque parameters ...................................................................................................................... 153

 

(IV) Service attention matters ............................................................................................................ 153

 

(V) Special tool .................................................................................................................................. 154

 

II. Failure diagnosis................................................................................................................................ 155

 

(I) Diagnosis analysis table ................................................................................................................ 155

 

(II) Diagnosis procedures table .......................................................................................................... 156

 

III. Release the fuel system pressure ...................................................................................................... 158

 

IV. Fuel tank assy................................................................................................................................... 159

 

(I) Disassembly ................................................................................................................................... 159

 

(II) Check ........................................................................................................................................... 160

 

                                                                                                                                                     

Content

 

Content                                                                                                                                                                                         8 

(III) Installation .................................................................................................................................. 160

 

V. Fuel evaporation nylon tube assy ...................................................................................................... 162

 

(I) Disassembly ................................................................................................................................... 162

 

(II) Installation .................................................................................................................................... 162

 

VI. Fuel inlet nylon tube assy ................................................................................................................ 163

 

(I) Disassembly ................................................................................................................................... 163

 

(II) Installation .................................................................................................................................... 164

 

VII. Fuel return nylon tube assy............................................................................................................. 165

 

(I) Disassembly ................................................................................................................................... 165

 

(II) Installation .................................................................................................................................... 165

 

VIII. Fuel delivery pump assy ................................................................................................................ 167

 

(I) Disassembly ................................................................................................................................... 167

 

(II) Check ........................................................................................................................................... 168

 

(III) Installation .................................................................................................................................. 169

 

IX. Fuel filter assy .................................................................................................................................. 171

 

(I) Disassembly ................................................................................................................................... 171

 

(II) Check ........................................................................................................................................... 172

 

(III) Installation .................................................................................................................................. 173

 

X. Feul filling tube assy ......................................................................................................................... 174

 

(I) Disassembly ................................................................................................................................... 174

 

(II) Check ........................................................................................................................................... 175

 

(III) Installation .................................................................................................................................. 175

 

XI. Fuel tube assy................................................................................................................................... 176

 

(I) Disassembly ................................................................................................................................... 176

 

(II) Installation .................................................................................................................................... 179

 

VII. Fuel pressure guiding rail components .............................................................................................. 181

 

(I) Disassembly ................................................................................................................................... 181

 

                                                                                                                                                     

Content

 

Content                                                                                                                                                                                         9 

(II). Check .......................................................................................................................................... 182

 

(III) Installation .................................................................................................................................. 183

 

Engine ignition system .............................................................................................................................. 185

 

I. Overview............................................................................................................................................. 185

 

(I) Structure overview ........................................................................................................................ 185

 

(II) System theory ............................................................................................................................... 185

 

(III) Technical and service data .......................................................................................................... 186

 

(IV) Torque data ................................................................................................................................. 186

 

II. Failure diagnosis................................................................................................................................ 187

 

(I) Diagnosis analysis table ................................................................................................................ 187

 

(II) Diagnosis procedures table .......................................................................................................... 187

 

(I) Disassembly ................................................................................................................................... 189

 

(II) Installation .................................................................................................................................... 189

 

IV. Ignition coil ...................................................................................................................................... 192

 

(I.) Disassembly .................................................................................................................................. 192

 

(II.) Check .......................................................................................................................................... 192

 

(III) Installation .................................................................................................................................. 192

 

V. Ignition plug ...................................................................................................................................... 193

 

(I) Disassembly ................................................................................................................................... 193

 

(II) Check ........................................................................................................................................... 193

 

(III) Installation .................................................................................................................................. 193

 

Engine auxiliary exhausts system .............................................................................................................. 194

 

I. Overview............................................................................................................................................. 194

 

(I.) Structure overview ....................................................................................................................... 194

 

(II) System theory ............................................................................................................................... 197

 

(III) Torque parameters ...................................................................................................................... 197

 

(IV) Service attention matters ............................................................................................................ 199

 

                                                                                                                                                     

Content

 

Content                                                                                                                                                                                         10 

II. Front oxygen sensor .......................................................................................................................... 201

 

(I) Disassembly ................................................................................................................................... 201

 

(II) Installation .................................................................................................................................... 201

 

III. Rear oxygen sensor .......................................................................................................................... 204

 

(I) Disassembly ................................................................................................................................... 204

 

(II) Check ........................................................................................................................................... 204

 

(III) Installation .................................................................................................................................. 206

 

IV. Carbon tank and its bracket ............................................................................................................. 207

 

(I.) Disassembly .................................................................................................................................. 207

 

V. Carbon tank solenoid valve connection tube .................................................................................... 209

 

(I) Disassembly ................................................................................................................................... 209

 

(II) Installation .................................................................................................................................... 209

 

VI、Carbon Canister Electromagnetic Valve ........................................................................................ 212

 

(I)Removal .......................................................................................................................................... 212

 

(II)Installation ..................................................................................................................................... 213

 

VII、PCV Valve .................................................................................................................................... 214

 

(I)Removal .......................................................................................................................................... 214

 

(II)Check ............................................................................................................................................ 214

 

(III)Installation ................................................................................................................................... 214

 

VIII、Connecting Hose of PCV Valve .................................................................................................. 216

 

(I)Removal .......................................................................................................................................... 216

 

(II)Check ............................................................................................................................................ 216

 

(III)Installation ................................................................................................................................... 216

 

(I)Removal .......................................................................................................................................... 218

 

(II)Installation ..................................................................................................................................... 218

 

X、Vacuum Boost Steel Pipe ................................................................................................................ 220

 

(I)Removal .......................................................................................................................................... 220

 

                                                                                                                                                     

Content

 

Content                                                                                                                                                                                         11 

(II)Installation ..................................................................................................................................... 221

 

XI、Ventilator Ventilation Hose ........................................................................................................... 223

 

(I)Removal .......................................................................................................................................... 223

 

(II)Installation ..................................................................................................................................... 223

 

Engine Control System .............................................................................................................................. 225

 

I、Summary ........................................................................................................................................... 225

 

(I)Structure Overview ......................................................................................................................... 225

 

(II)System Principle ........................................................................................................................... 225

 

(III)Technical parameters, maintenance parameters .......................................................................... 242

 

(IV)Torque parameters ....................................................................................................................... 242

 

(V)Maintenance precautions .............................................................................................................. 242

 

II、Fault Diagnosis ................................................................................................................................ 246

 

(I)On-Board Diagnostics .................................................................................................................... 246

 

(II)Diagnostic analysis table ............................................................................................................... 249

 

(IV)Fault Code Table .......................................................................................................................... 252

 

III、Electronic Throttle Valve ............................................................................................................... 295

 

(I)Disassemly ...................................................................................................................................... 295

 

(II)Check ............................................................................................................................................ 295

 

(III)Assembly ..................................................................................................................................... 297

 

IV、Absolute pressure sensor ............................................................................................................... 299

 

(I)Disassembly .................................................................................................................................... 299

 

(II)Check ............................................................................................................................................ 299

 

(III)Assembly ..................................................................................................................................... 301

 

V、Water temperature sensor ................................................................................................................ 302

 

(I)Disassembly .................................................................................................................................... 302

 

(II)Check ............................................................................................................................................ 302

 

(III)Assembly ..................................................................................................................................... 304

 

                                                                                                                                                     

Content

 

Content                                                                                                                                                                                         12 

VI、Camshaft position sensor ............................................................................................................... 304

 

(I)Disassembly .................................................................................................................................... 304

 

(II)Check ............................................................................................................................................ 304

 

(III)Assembly ..................................................................................................................................... 306

 

VII、Crankshaft position sensor ........................................................................................................... 307

 

(I)Disassembly .................................................................................................................................... 307

 

(II)Check ............................................................................................................................................ 307

 

(III)Assembly ..................................................................................................................................... 309

 

VIII、Knock sensor ............................................................................................................................... 310

 

(I)Disassembly .................................................................................................................................... 310

 

(II)Check ............................................................................................................................................ 310

 

(III)  Assembly ................................................................................................................................... 312

 

IX、  Pressure regulating valve ............................................................................................................. 313

 

(I)Disassembly .................................................................................................................................... 313

 

(II)Check ............................................................................................................................................ 313

 

(III)Assembly ..................................................................................................................................... 314

 

X、  ECM controller .............................................................................................................................. 316

 

(I)  Disassembly .................................................................................................................................. 316

 

(II) Assembly ...................................................................................................................................... 316

 

XI、  Electronic accelerator pedal assembly ......................................................................................... 318

 

(I)  Disassembly .................................................................................................................................. 318

 

(II)  Check .......................................................................................................................................... 318

 

(III)  Assembly ................................................................................................................................... 318

 

The Engine mounting system .................................................................................................................... 321

 

I. Overview............................................................................................................................................. 321

 

(I) Structure overview ........................................................................................................................ 321

 

(II) Torque parameters ........................................................................................................................ 322

 

                                                                                                                                                     

Content

 

Content                                                                                                                                                                                         13 

(III) Attention matters for service ...................................................................................................... 323

 

II. Failures diagnosis .............................................................................................................................. 323

 

(I) The diagnosis table ........................................................................................................................ 323

 

III. The rear engine mounting assy ........................................................................................................ 324

 

(I) Disassembly ................................................................................................................................... 324

 

(II) Check ........................................................................................................................................... 324

 

(III) Installation .................................................................................................................................. 325

 

IV. The rear engine mounting connection bracket ................................................................................. 327

 

(I) Disassembly ................................................................................................................................... 327

 

(II) Check ........................................................................................................................................... 327

 

(III) Installation .................................................................................................................................. 328

 

V. The left engine mounting assy .......................................................................................................... 330

 

(I) Disassembly ................................................................................................................................... 330

 

(II) Check ........................................................................................................................................... 331

 

(III)Installation ................................................................................................................................... 332

 

VI. The left engine mounting connection bracket.................................................................................. 333

 

(I) Disassembly ................................................................................................................................... 333

 

(II) Check ........................................................................................................................................... 334

 

(III) Installation .................................................................................................................................. 334

 

(VII) The right engine mounting assy .................................................................................................... 335

 

(I) Disassembly ................................................................................................................................... 335

 

(II) Check ........................................................................................................................................... 336

 

(III) Installation .................................................................................................................................. 336

 

 

 

                                                                                                        

Engine Mechanical System

 

Engine Mechanical System                                                                                                                                                           14 

 

Engine Mechanical System 

 

I. Summary 

(I) structure overview 

 

break-down table 

Cylinder cover 

 

 

 

 

1. Exhaust valve 

2. Intake valve 

3. Intake Valve Seat 

4. Intake Valve Seat 

5. Intake Valve pipe 

6. Exhaust valve pipe 

7. Intake valve oil seal 

8. Intake valve spring shim 

9. Intake valve spring 

 

 

10. Intake valve spring seat 

11. Valve lock clamp 

12. Mechanic tappet 

13. Exhaust valve spring seat 

14. Exhaust valve spring 

15. Exhaust valve spring shim 

16. Exhaust valve oil seal 

17. Cylinder cover 

 

(II) System theory 

 

                                                                                                        

Engine Mechanical System

 

Engine Mechanical System                                                                                                                                                           15 

Working principle of reciprocating piston engine 

-  Intake stroke:Piston moves from TDC to BDC under the drive of CrankshaftAt this time, 

exhaust valve closes, intake valve opensWhen piston is moving, volume of cylinder is increasing, 

which creates kind of vacuum inside of cylinder.ECM controls oil injector and spray oil into intake 

pipe, now intake valve opens, 

the mixture of air and oil is sucked into the cylinder through intake valve, and creates mixed 

air which can burn inside of cylinder. 

 

-  Compression  stroke:  After  the  intake  stroke,  crankshaft  will  continuouslly  take  piston  to 

move from BDC to TDC.Now, intake valve and exhaust valve are all closed, along with movement 

of piston, the volume of cylinder is decreasing. Because air can be compressed, and temperature 

will rise after compression. 

- Power stroke: When the compression stroke is finished, ECM controls the initial coil circle 

of ignition coil to disconnect, and creates high-voltage power at  secondary polar, the high-voltage 

power is quickly conducted to piston  on top of cylinder cover, finally high voltage breakthrough 

the interval of spark plug, and ignite the mixed air inside the cylinder. The flame will spread to 

the whole combustor quickly, and unleash much heat.  Volume of the burning  gas will expand 

dramatically,  pressure  and  temperature  will  rise  samutanuously,  the  expansion  power  act  on 

surface of piston, push piston move from TDC to BDC, transform the piston from reciprocating 

movement  to  rotational  motion  through  connecting  rod.  At  the  same  time,  intake  and  exhaust 

valves are still closed.  

 

- exhaust stroke

：when exhaust stroke starts, intake valve is still closed, the crankshaft takes 

piston to move from BDC to TDC through connecting rod, now, expanded burning gas, under the 

push power of self pressure and piston, is exhausted out of cylinder through exhaust valve. When 

piston arrives to TDC, the exhaust stroke finishes, exhaust valve closes. But in reality, intake valve 

opens before TDC and closes after the BDC. 

Purpose of this kind of design is for sufficient intake and to decrese the power consumption 

during  intake  period.  During  exhaust  period,  exhaust  valve  opens  before  the  BDC,  and  closes 

after the TDC.  The purpose is to decrese the mixed gas inside cylinder and decrease the power 

consumption during intake period, at the same time, because intake and exhaust valve has certain 

overlapped  angle,  which  means  within  certain  crankshaft  angle  intake  and  exhaust  valve  open 

samutanuously, and because already burnt gas has been exhausted through exhaust valve, creating 

                                                                                                        

Engine Mechanical System

 

Engine Mechanical System                                                                                                                                                           16 

inertia, which can take mixed gas in, which is beneficial to air intaking to some extent. However, 

it is not always good to have bigger overlapped angle, requirements for overlapped angle under 

different conditions are different. Therefore, this engine adopts VVT technology, whose purpose 

is to satisfy the need to open angel of intake valve under different conditions, and this function is 

realized through OCV. 

OCV system working principle 

VVT is the abbreviation of Variable Valve Timing. All the objects with mass have inertia

，

including the air which is intaken into the engine cylinder

，air still has the trend of getting in after 

the  air intake  stroke.  Now,  if  the  valve  closure  time postpones  ,  cylinder  can  intake  more  air, 

which can improve the volume efficiency. 

The result is: the more time postponed when valve closes, the higher performance is under 

high  rpm  situation;  Otherwise,  if  the  valve  closes  in  advance,  performance  under  low  rpm  is 

much stable, torque is much bigger. 

(III)technical parameters、maintenance parameters 

 

Technical specifications 

 

type 

HFC4GB2.3D 

Engine type 

In-line 4 cylinder

、double overhead camshafts、16 valves、  VVT 

Whole car carry type 

                                       Horizonontally 

Cylinder number 

4 

Cylinder diameter(mm) 

75 

troke(mm) 

84.8 

displacement (L) 

1.499 

Compression ratio 

10:1 

cylinder liner type 

Dry  (    aluminium cover) 

ignition order 

1-3-4-2 

Rated power(kW) 

83 

Rated rotation  speed(r/min) 

6000