SsangYong: Engine Euro 4. Manual - part 24

CHANGED BY

EFFECTIVE DATE

AFFECTED VIN

21

2433

EXHAUST SYSTEM

D27DTP/D27DT (EU4)  SM - 2006.08

D27DTP/D27DT (EU4)

ENGINE

FUEL

I

N

T

AKE

EXHAUST

PRE-HEA

TING

LUB

COOLING

SWITCHABLE

ECU

DIAGNOSIS

2. Disconnect the vacuum hoses (1, 2) from vacuum

modulator.

Removal and Installation

1. Disconnect the vacuum modulator connector.

2. REMOVAL AND INSTALLATION OF VACUUM MODULATOR

Vacuum Flow

Booster

Vacuum pump

Connected to

VGT turbocharger

actuator

1. Vacuum hose to VGT

turbocharger

2. Vacuum hose to

vacuum pump

Switchable engine mounting solenoid

(or IWE locking hub for P/T 4WD vehicle)

To atmosphere

Connector

Vacuum

pump

VGT vacuum

actuator

Vacuum Modulator

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AFFECTED VIN

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2433

EXHAUST SYSTEM

D27DTP/D27DT (EU4)  SM - 2006.08

D27DTP/D27DT (EU4)

3. Unscrew the mounting bolt and remove the vacuum modulator (Tightening torque: 10 ± 1.0 Nm).

4. Install in the reverse order of removal.

Mounting bolt

Vacuum modulator

To atmosphere

Connector

Vacuum

pump

VGT vacuum
actuator

Vacuum Modulator

CHANGED BY

EFFECTIVE DATE

AFFECTED VIN

23

2411

EXHAUST SYSTEM

D27DTP/D27DT (EU4)  SM - 2006.08

D27DTP/D27DT (EU4)

ENGINE

FUEL

I

N

T

AKE

EXHAUST

PRE-HEA

TING

LUB

COOLING

SWITCHABLE

ECU

DIAGNOSIS

1. SPECIFICATIONS FOR ENGINE WITH CDPF

D27DT + CDPF (Catalytic Diesel Particulate Filter)

Engine

Cylinder

Displacement

(cc)

Compression ratio

Max. Power

(ps/rpm)

Tightening torque

(kg.m/rpm)

Idle speed

Valve

Camshaft

Fuel system

Catalytic
converter &
filter

Lubrication
system

Cooling
system

Type/Number

Inner diameter

(mm)

Stroke

(mm)

For Automatic Transmission

Intake

Exhaust

Type

Fuel type

Fuel pump type

Fuel supply pressure

Water separation in fuel filter

Fuel tank capacity

( )

Type

Metal type

Metal weight

(g)

Volume

(cm

3

)

Metal ratio (Pt:PD:Rh)

Oil specification

Lubrication type

Oil filter type

Oil capacity

( )

Cooling type

Cooling fan operation type

Thermostat
(* Full open 100°C)

Coolant capacity

( )

D27DT/5-cylinder

86.2

92.4

2696

18:1

165/4,000

35.7/2,000 ~ 3,000

760 ± 50 rpm

16°

33°

46°

21°

DOHC

Low sulfur diesel

Vane pump in HP pump

HP pump inlet port: max. 400 mbar

HP pump outlet port (with IMV fully open): over 1,050 bar

at every 10,000 km

78

Oxidizing catalyst/DPF

Platinum

Catalyst DOC: 110g/ft

3

Catalyst DPF: 18g/ft

3

Catalyst DOC: 1,200

Catalyst DPF: 3,900

Pt Only

SAE 10W40, 5W40

(MB Sheet 229.1, 229.3 approved oil)

Gear pump, forced circulation

Full flow type, filter element type

6.5 ~ 8.5

Water cooling, forced circulation

Belt operated type

85

WAX Pellet Type

 11.5

Specifications (D27DT Engine)

Descriptions

Opens (btdc)

Closes (abdc)

Opens(bbdc)

Closes (atdc)

Opening
temperature (°C)

Type

CHANGED BY

EFFECTIVE DATE

AFFECTED VIN

24

2411

EXHAUST SYSTEM

D27DTP/D27DT (EU4)  SM - 2006.08

D27DTP/D27DT (EU4)

2. OVERVIEW

As the solution for environmental regulations and PM (Particla Material) of
diesel engine, the low emission vehicle is getting popular. This vehicle is
equipped with an extra filter to collect the soot and burn it again so that the

amount of PM in the exhaust gas passed through the DOC (Diesel Oxydation
Catalyst) is reduced. The CDPF (Catalyst & Diesel Particulate Filter) is an

integrated filter including DOC (Diesel Oxydation Catalyst) and DPF (Diesel
Particulate Filter).

3. MAJOR CHANGES FOR CDPF SYSTEM

The CDPF system is installed for D27DT engine and the major changes are as follows.

The engine ECU has been revised since terminals
have been added for front/rear temperature
sensors, differential sensor and vacuum modulator
for controlling throttle flap.
Its version is 3.1, but it is not compatible with ECU
without CDPF.

Differential Pressure Sensor

(

ΔP sensor)

As the soot is filtered in the
CDPF, the pressure between
the front side and the rear side
of the filter is different from
each other. If the amount of soot
is over 28 g, the soot is burnt in
the CDPF. The combustion is
determined depending on the
pressure difference, tempera-
ture of exhaust gas and EGR
ratio. According to these, the
soot filtered by post injection of
injector is burnt at 600°C.

CDPF (Catalyst & Diesel Particulate Filter) and Sensors

The two temperature sensors installed in
CDPF have the following functions:

Front temperature sensor:
Measuring the temperature of exhaust
gas (exhaust manifold)

Rear temperature sensor:
Measuring the temperature of exhaust
gas passed through DOC

The rear temperature sensor monitors the tem-
perature of exhaust gas. If the temperature is below
600°C, the amount of post injection is increased to
increase the temperature.

Temperature Sensor

Engine ECU

The I.D and O.D of fuel rail has changed from 2.4
mm/6.0 mm to 3.0 mm/6.35 mm. Also, the damping
orifice is installed to prevent the fuel pulsation
occured by fuel pressure.

Fuel Common Rail and Fuel Rail

(Between Common Rail and Injector)

CDPF front temperature
sensor

CDPF rear temperature
sensor

Differential pressure
sensor front connecting port

Differential pressure
sensor rear connecting port