当前,国际上内燃机,特别是汽油机的发展目标,是既要降低油耗,又要减少有害排放.大众/奥迪(VW/Audi)公司的机型发展情况从统计的角度也证实了这种观点.Seffert在文献〔1〕中说,通过机型的发展,在1965至1978年间油耗降低了25%.由这段期间所进行的进一步研究可以推测,将油耗进一步降低到35%肯定不是不可能 At present, the international development objective of internal combustion engines, especially gasoline engines, is to reduce both fuel consumption and harmful emissions, and the VW / Audi model has confirmed this view from a statistical point of view. Seffert said in [1] that through model development, fuel consumption was reduced by 25% between 1965 and 1978. Further research conducted during this period suggests that it is certainly not impossible to further reduce fuel consumption to 35%