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排气提前角对增压柴油机输出功的影响较为复杂 ,主要影响了柴油机的排气损失、涡轮功、增压压力和扫气压差等 ,本文对此作了综合的分析。本文还推导出考虑了排气提前角和泵气功在内的指示功的计算公式 ,并应用该公式 ,分析了排气提前角θ对指示功wi 以及dwi/dθ的综合影响 ,得出了存在着一个有利排气提前角使指示功最大的结论。
The influence of the exhaust gas advance angle on the output work of the turbocharged diesel engine is more complicated, which mainly affects the exhaust loss of the diesel engine, the turbine work, the boost pressure and the scavenging pressure difference. The paper makes a comprehensive analysis of this. This paper also deduces the calculation formula of the indicated work considering the advance angle of the exhaust gas and the pump work, and uses the formula to analyze the combined influence of the exhaust advance angle θ on the indicated work wi and the dwi / dθ. With a favorable advance exhaust angle to make the largest indication of the conclusion.