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6A – 6 ENGINE MECHANICAL MAIN DATA AND SPECIFICATIONS Engine model Item 4JA1TC 4JH1TC Engine type Four-cycle, overhead valve, water cooled Combustion chamber type Direct injection Cylinder liner type Dry type, chrome plated, stainless steel tube Gear drive No. of cylinders-bore × stroke mm (in) 4 – 93 × 92 (3.66 × 3.62) 4 – 95.4 × 104.9 (3.76 × 4.13) No. of piston rings Compression ring: 2 / Oil ring: 1 Total piston displacement cm 3 (in 3 ) Compression ratio (to 1) 2,499 (152.4) 18.5 2,999 (183.3) 18.3 Compression pressure kg/cm 2 (psi/MPa) 31 (441/3.0) – 200 rpm 28 (398/2.8) – 200 rpm Engine weight kg (lb) Approximately 274 (604.2) Fuel injection order 1 – 3 – 4 - 2 Fuel injection timing BTDC deg Not Adjustment Specified fuel type EC diesel fuel Idling speed rpm 730±25 700±25 Valve clearances (At cold): Intake mm (in) Exhaust mm (in) Intake valves Open at (BTDC) deg Close at (ABDC) deg Exhaust valves Open at (BBDC) deg Close at (ATDC) deg Fuel system 0.4 (0.016) 24.5
BOSCH VP44 (electronic controlled fuel injection pump) Injection nozzle type Injection nozzle opening pressure Double spring type (Hole type)
(Design value) kg/cm 2 (psi/MPa) 1st: 199(2,830/19.5) 2nd: 347(4,934/33,500) 1st: 198(2,816/19.4) 2nd: 344(4,906/33,800) Number of injection nozzle orifices method 5 Cartridge paper element and water separator
Pressure circulation Specified engine oil (API grade) CD Oil pump type Oil filter type Gear Cartridge paper element Oil capacity lit (US/UK gal) 6.5 (1.7/1.4) For 4 × 2 7.3 (1.9/1.6) For 4 × 4 Oil cooler type Water cooled
4JA1TC, 4JH1TC : 4JA1, 4JH1 Engine with turbocharger and inter cooler |