Then paper introduces a method by which the engine size and the speed reduction ratio from the engine to drive wheels based on the cruising mode ( one of the two basic modes for an electrically peaking hybrid vehicle ' s operation ) 而后重点针对电力峰值型并联混合动力电动汽车动力的两种操作模式介绍了一种基于恒定高速行驶模式的,用来确定发动机大小以及发动机与驱动轮之间传动比的方法。