【摘要】 分析预混燃烧期是研究柴油机燃烧性能的重要内容。通过从预混燃烧期的基本定义出发,在发动机放热率曲线上拟合出了用以确定预混燃烧期终点的公式。并试验验证了公式对不同燃料的普遍适用性。试验研究表明：相同转速下同种燃料的预混燃烧期随负荷增加而缩短；负荷相同时,转速越高预混燃烧期越长。更多还原

【Abstract】 Premixed combustion research is the most important part of the study of the combustion process of a direct injection (DI) diesel engine.A formula used to define the end-point of premixed combus- tion duration was developed in the heat release curve of the engine.The results of the experiment show that this formula can applicable in many conditions;when the rotative speed of engine is fixed,the premixed com- bustion duration will shorten with the increase engine load;if the load of engine is fixed,the premixed com- bustion duration will prolong with the increase of the engine rotative speed.更多还原