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The design of integrated outlet water header pipe of cylinder head is adopted, which reduces the sealing surface and improves sealing reliability.
Full-flow oil cooler is adopted; thus heat dissipation efficiency is increased by 30% and oil temperature is effectively reduced; and the oil can lubricate the parts under reasonable temperature to reduce the friction loss.
Leading and mature HPCR(BOSCH) fuel system and high-efficient turbocharged intercooled technologies are adopted, which ensure precise control of fuel-injection quantity and sufficient air intake; and the full combustion, low fuel consumption and less emission of diesel engine under different load conditions are ensured.
The main structures, such as engine body, are time-tested, which ensures the high reliability of the whole engine.
The internally-cooled oil channel is adopted for piston, which effectively reduces piston temperature and ensures the long service life.
Requirements for Grade G3 generator set performance is satisfied.
| Number | Item | 4A-T3 | ||
| 1 | Model | YC4A165-D30 | YC4A190-D30 | YC4A205-D32 |
| 2 | Number of cylinders-Bore × Stroke（mm）mm | 4-108×132 | 4-108×132 | 4-108×132 |
| 3 | DisplacementL | 4.84 | 4.84 | 4.84 |
| 4 | Number of valves per cylinder | 2 | 2 | 2 |
| 5 | 进气方式 | 增压中冷 | 增压中冷 | 增压中冷 |
| 6 | 常用功率/转速kW/(r/min) | 110/1500 | 125/1500 | 138/1800 |
| 7 | 备用功率/转速kW/(r/min) | 121/1500 | 138/1500 | 152/1800 |
| 8 | 排放水平 | GB20891-2014第三阶段 | GB20891-2014第三阶段 | GB20891-2014第三阶段 |
| 9 | 排放Technical Route | BOSCH电控共轨 | BOSCH电控共轨 | BOSCH电控共轨 |
| 10 | 外特性最低燃油耗g/kW·h | ≤210 | ≤210 | ≤210 |
