简要介绍了一种新型的汽油机的稀薄燃烧系统，可以有效地降低燃油消耗率和废气排放。
This paper briefly introduces a new lean combustion system which can effectively reduce fuel consumption rate and exhaust emissions.
试验表明：喷油时刻对于降低燃油消耗率影响很大，小负荷时必须对喷油时刻进行精确控制；
The dynamometer test results showed that the injection timing had a large effect on the fuel consumption and it must be accurately and precisely controlled, when the engine was working at low load.
计算结果表明，选择合适的压缩比、喷油提前角，可以改善缸内的燃烧过程，降低燃油消耗率。
The calculation result indicates that choose the appropriate compression ratio, the Angle of fuel injection can improve the cylinder burn and reduce the fuel exhaust.
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