Products
The key parts and components such as the engine block, crankshaft, connecting rod, bearing bush, and gear train are the same as those of a diesel engine, making the product highly reliable. At the same time, the combustion and explosion pressure of the gas engine is 20% ~ 30% lower than that of diesel, ensuring a large reliability margin.
The gas engine has lower carbon emissions compared with the diesel engine at the same power level. Almost zero PM and sulfide emissions. HC, CO, and NOx emissions meet the regulatory requirements of China II emission standards for ships.
Explosion-proof design of crankcase: A special explosion-proof valve is provided on the crankcase side to ensure that the crankcase pressure is within a reasonable range. Exhaust temperature monitoring design: An exhaust temperature sensor is designed to monitor the exhaust temperature of the engine, ensuring its safety of the engine. The water-cooled exhaust pipe ensures low thermal radiation, reduced compartment temperature, and good accessibility.
The turbocharged & intercooled lean combustion technology ensures efficient and clean combustion and good economy. Electronically-control turbocharging technology ensures accurate turbocharged pressure control and improved responsiveness of the engine. The oxygen sensor closed-loop control technology enables accurate air-fuel ratio control and improved performance consistency and stability of the engine. High-energy ignition technology ensures increased ignition energy, faster rapid engine combustion, and improved economy.
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Name |
Technical specifications |
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Category |
Marine G-drive auxiliary engine |
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Model |
YC4D80NL-C21 |
YC4D70NL-C21 |
YC4D55NL-C21 |
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Type |
Vertical, in-line, water-cooled, four-stroke |
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Induction system |
Turbocharged & intercooled |
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Number of cylinders |
4 |
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Bore mm |
108 |
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Stroke mm |
115 |
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Displacement L |
4.21 |
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Rated power kW |
57 |
50 |
40 |
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Rated speed r/min |
1500 |
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Overload power kW |
62.7 |
55 |
44 |
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Overload speed r/min |
1500 |
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Average piston speed m/s |
5.75 |
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Mean effective pressure MPa |
1.08 |
0.95 |
0.76 |
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Firing order |
1—3—4—2 |
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Rotation |
Anticlockwise (facing the power output end) |
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Starting mode |
Electric start |
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Fuel |
NG |
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Oil capacity L |
12 |
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Steady-state speed regulation % |
≤5 |
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Instantaneous speed regulation % |
≤15 |
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Emission |
China II marine engines |
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Diemension（Length × width × height） mm |
1040×790×1155（Diemension may vary with configuration.） |
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Dry weight kg |
520（ may vary with configuration.） |
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Large displacement, high gradeability and high efficiency
Bosch high pressure common rail (HPCR) fuel injection system with the injection pressure up to 1,600 bar, achieving multiple injections and accurate control
High-strength alloy cast iron cylinder head
General engine block + independent crankcase
Long B10 service life design, which can be more than 500,000 km
Reduction soft meshing starter, ensuring smooth start
A framed engine body structure, ensuring good rigidity and small vibration
Damping gear
The key parts and components such as the engine block, crankshaft, connecting rod, bearing bush, and gear train are the same as those of a diesel engine, making the product highly reliable. At the same time, the combustion and explosion pressure of the gas engine is 20% ~ 30% lower than that of diesel, ensuring a large reliability margin.
The gas engine has lower carbon emissions compared with the diesel engine at the same power level. Almost zero PM and sulfide emissions. HC, CO, and NOx emissions meet the regulatory requirements of China II emission standards for ships.
Explosion-proof design of crankcase: A special explosion-proof valve is provided on the crankcase side to ensure that the crankcase pressure is within a reasonable range. Exhaust temperature monitoring design: An exhaust temperature sensor is designed to monitor the exhaust temperature of the engine, ensuring its safety of the engine. The water-cooled exhaust pipe ensures low thermal radiation, reduced compartment temperature, and good accessibility.
The turbocharged & intercooled lean combustion technology ensures efficient and clean combustion and good economy. Electronically-control turbocharging technology ensures accurate turbocharged pressure control and improved responsiveness of the engine. The oxygen sensor closed-loop control technology enables accurate air-fuel ratio control and improved performance consistency and stability of the engine. High-energy ignition technology ensures increased ignition energy, faster rapid engine combustion, and improved economy.