汽油机具有重量轻、升功率大、加速性好、振动小、声轻、烟少等优点,是较好的车用动力。然而,它也存在油耗高、排气污染严重等缺点。近些年来,由于世界性的石油紧张及汽车排气对大气的污染,推动了汽油机工作过程的研究工作,其中能够兼顾节油和减轻排气污染的分层进气稀混合气燃烧受到了广泛重视,并被认为是有前途的方法之一。 Gasoline engine with light weight, high power, acceleration, vibration, light, less smoke, etc., is a good vehicle power. However, it also has the disadvantages of high fuel consumption and serious exhaust pollution. In recent years, due to the worldwide oil shortage and the pollution of automobile exhaust to the atmosphere, the research on the working process of gasoline engine has been promoted. Among them, stratified intake lean combustion that can save fuel and reduce exhaust pollution is widely used Emphasize and be considered one of the promising ways.