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Volvo DEUTZ classic 912 series air-cooled inline-6 naturally aspirated diesel engine F6L912W
Basic Thermodynamics & Performance Parameters
| Parameter Item | OEM Standard Data | Unit | Technical Interpretation / Remarks |
|---|---|---|---|
| Rated Power Range | 60 ~ 82 (Max up to 85) | kW | Approx. 81 ~ 115 Horsepower (HP). |
| Rated Speed | 2150 ~ 2800 | rpm | Governor is calibrated based on equipment application (e.g., LHD scoop trams vs. mining trucks). |
| Max Output Torque | 298 ~ 370 | N·m | High low-end torque characteristics, ideal for altitude operations and heavy-duty slope climbing. |
| Speed at Max Torque | 1550 ~ 1600 | rpm | The torque backup factor peaks in this range, providing maximum lugging power. |
| Idle Speed (Stable Low) | 650 ~ 700 | rpm | Avoid prolonged low-idling; insufficient fan speed can cause rapid engine overheating. |
| Min. Fuel Consumption | ≤ 228 | g/kW·h | Highly economical within its optimum rpm cruising range. |
| Mean Effective Pressure | 0.65 ~ 0.72 | MPa | Mild and safe cylinder pressure typical of a naturally aspirated (non-turbocharged) engine. |
Combustion, Air Intake & Underground Emission Parameters
| Parameter Item | OEM Standard Data | Unit | Technical Interpretation / Remarks |
|---|---|---|---|
| Combustion System | Two-Stage Combustion (W-Type) | - | Features a swirl pre-chamber + main combustion chamber for localized two-phase low-pollution combustion. |
| Compression Ratio | 22 : 1 | - | Ultra-high compression ratio ensures minimal residual emissions and excellent cold-starting. |
| Aspiration Mode | Naturally Aspirated | - | Simple structure without turbocharger lag; maintains relatively stable exhaust gas temperatures. |
| Min. Air Intake Volume | ≥ 5.2 | m³/min | Minimum airflow requirement for the air filter at 2500 rpm under full load. |
| Max. Exhaust Temp. | ≤ 550 | °C | Full-load exhaust temperature. The W-type runs cooler than standard 912 industrial engines. |
| Carbon Monoxide (CO) | ≤ 0.08% (200~800 ppm) | Vol | Core Advantage: CO emission levels are significantly lower than standard industrial diesel engines. |
| Nitrogen Oxides (NOx) | ≤ 450 | ppm | Low NOx emissions minimize toxicity in underground worker breathing zones. |
Electrical, Weight & Physical Structure
| Parameter Item | OEM Standard Data | Unit | Technical Interpretation / Remarks |
|---|---|---|---|
| System Voltage | 12 or 24 | V | Underground flameproof/explosion-proof vehicles typically use 24V isolated two-wire systems. |
| Starter Motor Power | 3.7 ~ 4.5 | kW | Heavy-duty, high-torque reduction starter motor. |
| Alternator Rating | 14V/55A or 28V/35A | - | Industrial alternator equipped with sealed dust and moisture protection shielding. |
| Cylinder Head Torque | 30 N·m → 45° → 45° → 45° | - | Tightened via the OEM angle method: torque to baseline, then turn 45 degrees 3 times progressively. |
| Flywheel Housing Spec | SAE 2 or SAE 3 | - | Standardized industrial housing interface for direct mating with torque converters or hydraulic pumps. |
| Direction of Rotation | Counter-clockwise | - | Standard left-hand rotation engine, viewed looking directly at the flywheel end. |
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