在Ricardo Hydra单缸柴油机上,采用一次主喷射+一次后喷射的方法进行了5组燃烧对比试验。示功图和缸内燃烧分析表明,两次喷射有效地延长了等压加热过程,平均有效压力得到较大的提高,NOx排放有一定幅度的下降。 On the Ricardo Hydra single cylinder diesel engine, a series of combustion contrast tests were conducted using one main injection plus one post-injection. The kinetic diagram and in-cylinder combustion analysis show that the two shots effectively extend the isobaric heating process, the average effective pressure is greatly increased, and NOx emission is reduced to a certain extent.