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JAC ISUZU 4JB1 4KH1 Jianghuai JAC Engine Assembly
Core Power & Performance Specifications
| Parameter | 4JB1-TC (Classic Turbo) | 4KH1-TC (Modern High-End) |
|---|---|---|
| Max Horsepower (HP) | 95 - 115 hp | 120 - 150 hp |
| Rated Power (kW) | 70 - 85 kW | 88 - 110 kW |
| Rated Speed (rpm) | 3400 - 3600 rpm | 2600 - 3000 rpm |
| Max Torque (N·m) | 202 - 235 N·m | 280 - 375 N·m |
| Peak Torque Range | 2000 - 2200 rpm | 1400 - 2400 rpm (Flatter plateau) |
| Emission Standard | Euro 2 / Euro 3 | Euro 5 / Euro 6 |
Structure & Engine Block Specifications
| Parameter | 4JB1-TC | 4KH1-TC |
|---|---|---|
| Displacement | 2.771 L | 2.999 L |
| Bore × Stroke (mm) | 93 × 102 mm | 95.4 × 104.9 mm |
| Compression Ratio | 18.2 : 1 | 16.3 : 1 - 17.5 : 1 |
| Aspiration | Turbocharged | Turbocharged & Intercooled + VGS |
| Valve Train | OHV, 8 Valves | DOHC, 16 Valves |
| Block/Head Material | Cast Iron / Cast Iron | Cast Iron / Aluminum Alloy |
| Timing Drive | Gear Drive (Maintenance-free) | Timing Chain (Long-life/Quiet) |
Systems & Maintenance Details
| Parameter | 4JB1-TC | 4KH1-TC |
|---|---|---|
| Fuel System | Mechanical VE Pump | Bosch High-Pressure Common Rail |
| Injection Pressure | ~200 - 300 bar | 1600 - 1800+ bar |
| Cold Start Assist | Glow Plugs | ECU-controlled Preheating |
| After-treatment | None / Simple EGR | EGR + DOC + DPF + SCR (AdBlue) |
| Oil Capacity | Approx. 7.5 L | Approx. 7.0 L |
| B10 Design Life | ~500,000 km | ~1,000,000 km (Highway) |
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