Author takes a Y4100Q natural inspiration diesel engine as sample engine, and analyze the effect of injection law to emission. Injection law and spew pressure experiment are carried on a test bed.

• 作者以江苏扬动股份有限公司生产的Y4100Q型柴油机(自然吸气)为试验样机,分析柴油机喷油规律对排放的影响。