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JAC TRUCK Anhui Cummins ENGINE 2.7L (2.7TD) Inline-4 High-Pressure Common Rail Diesel Engine HFC4DE1-1D
Structural Design & Material Specifications
| Parameter / Item | Technical Specification | Description & Core Notes |
|---|---|---|
| Cylinder Layout & Number | In-line 4 (I4) | Vertical layout, classic compact light truck design. |
| Valvetrain Type | DOHC (Double Overhead Camshaft) | 4 valves per cylinder (16V total); high scavenging efficiency. |
| Bore × Stroke | 95 mm × 97 mm | Near-square design, balancing high RPM and low-speed high torque. |
| Compression Ratio | 16.5 : 1 | High compression ratio for efficient and complete diesel compression ignition. |
| Cylinder Block Material | High-Strength Alloy Cast Iron | Ensures no deformation under high peak firing pressure; highly durable. |
| Cylinder Head Material | Cast Aluminum Alloy | Significantly reduces front axle weight; offers superior heat dissipation. |
| Firing Order | 1 - 3 - 4 - 2 | Standard balancing firing order for four-cylinder engines. |
| Direction of Rotation | Counter-Clockwise (viewed from flywheel) | Standard commercial vehicle engine rotation. |
Power & Performance Performance Parameters
| Parameter / Item | Technical Specification | Description & Core Notes |
|---|---|---|
| Rated Power | 112 kW (152 hp) | Maximum rated power achieved usually at 3200 RPM. |
| Maximum Torque | 355 N·m | Broad torque plateau, spanning from 1600 to 2400 RPM. |
| Min. Fuel Consumption (Full Load) | ≤ 202 g/kW·h | Ranked in the top tier for fuel economy among engines of similar displacement. |
| Idle Speed | 750 ± 50 RPM | Smooth idling with well-controlled NVH (Noise, Vibration, Harshness). |
| Max. No-Load Governed Speed | Approx. 3800 RPM | Controlled by ECU electronic governor to prevent engine overspeed (runaway). |
| Specific Power | Approx. 40.8 kW/L | Ample power reserve, capable of handling heavy-duty cargo hauling. |
Fuel, Intake & Electrical Control Parameters
| Parameter / Item | Technical Specification | Description & Core Notes |
|---|---|---|
| Emission Standard | China IV / China V | Calibrated based on export market or regional regulations; supports SCR/DPF upgrades. |
| Fuel System Technology | High-Pressure Common Rail | Utilizes premium BOSCH electronically controlled common rail system. |
| Max. Common Rail Pressure | 1600 bar ~ 1800 bar | Ultra-high pressure injection for fine fuel atomization and clean combustion. |
| Intake Aspiration Type | Turbocharged Intercooled (TCI) | Equipped with electronically or pneumatically controlled wastegate/VGT turbo. |
| System Operating Voltage | 12V / 24V (Chassis Dependent) | Usually 12V for passenger vans (Sunray) and 24V for commercial light trucks. |
| ECU Model | BOSCH EDC17 Series | Supports advanced diagnostics, live data stream reading, and flash reprogramming. |
Cooling, Lubrication & Fluid Capacity Parameters
| Parameter / Item | Technical Specification | Description & Core Notes |
|---|---|---|
| Lubrication Method | Combined Pressure & Splash | Forced pressure lubrication is applied to critical journal bearings. |
| Engine Oil Capacity | Approx. 6.8 L ~ 7.5 L | Varies slightly depending on the oil pan design (truck vs. van). |
| Recommended Oil Grade | API CI-4 or CJ-4 | Viscosity: 15W-40 (Summer/Warm climates) or 5W-30 (Winter/Cold climates). |
| Engine Oil Pressure | Idle: ≥ 100 kPa; High Speed: ≥ 350 kPa | Low oil pressure below these specs will trigger the dashboard warning light. |
| Cooling Method | Forced Liquid Cooled (Closed-loop) | Closed-loop water cooling with a viscous silicone clutch fan for on-demand cooling. |
| Total Coolant Capacity | Approx. 10 L ~ 12 L (with Radiator) | Must use heavy-duty extended-life coolant to prevent cylinder liner cavitation. |
| Thermostat Opening Temp. | Initial: 76°C ~ 82°C; Fully open: 93°C | Ensures the engine rapidly reaches its optimal operating temperature (around 85°C). |
Overhaul & Assembly Tightening Specs (For Maintenance)
| Parameter / Item | Technical Specification | Description & Core Notes |
|---|---|---|
| Valve Clearance | Intake: 0.25 mm; Exhaust: 0.35 mm | Standard clearance measured with a feeler gauge under Cold State. |
| Cylinder Head Gasket Thickness | 1.40 mm ~ 1.55 mm (Graded) | Select the corresponding thickness grade based on piston protrusion after machining. |
| Cylinder Head Bolt Torque | Multi-stage Torque + Angle Method | Must use a torque angle meter; tighten from the center outwards in a specific order. |
| Connecting Rod Cap Bolt Torque | Approx. 60 N·m + 90° (Turn angle) | Torque-to-yield (stretch) bolts; always replace with new bolts during an overhaul. |
| Main Bearing Cap Bolt Torque | Approx. 90 N·m + 120° (Turn angle) | Ensures crankshaft alignment and stability under high-speed operation. |
| Engine Dry Weight | Approx. 235 kg ~ 250 kg | Bare engine with main accessories (excluding transmission); requires >0.5-ton hoist. |
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