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针对越来越苛刻的乘用车油耗法规,研究分析了高效自然吸气汽油机的关键技术和技术路线:在不增加较多的汽油机成本的前提下,通过采用提高压缩比、米勒循环、高比例废气再循环(EGR)、强化滚流的进气道和紧凑型燃烧室、4-2-1排气歧管、高性能点火系统以及低摩擦等关键技术,能较大地提高汽油机热效率,降低油耗,使汽车汽油机达到较好的性价比。
In view of the more and more stringent fuel consumption regulations of passenger cars, the key technologies and technical routes of high efficiency naturally aspirated gasoline engines are studied and studied. Without increasing the cost of gasoline engines, the method of improving the compression ratio, Miller cycle, Proportional exhaust gas recirculation (EGR), enhanced tumble inlet and compact combustion chamber, 4-2-1 exhaust manifold, high performance ignition system and low friction and other key technologies, can greatly improve the thermal efficiency of gasoline engine and reduce Fuel consumption, the car gasoline engine to achieve better cost performance.