本文以体现发动机动力性能的重要指标之一转矩为切入点,对当下燃油发动机、电动机、天然气发动机和混合动力发动机等主流机型进行了分析对比。转矩在物理学中指力矩的大小,等于力和力臂的乘积,所以又称扭力或扭矩。而汽车发动机的转矩是指发动机从曲轴端输出的力矩。它的准确定义是:活塞在汽缸里做往复运动,每一次往复都会做一定的功,在每个单位距离所做的功就是转矩。与此相对应,在每个单位 In this paper, one of the important indicators of engine power performance as a starting point for the moment, the current fuel-engine, electric motor, natural gas engines and hybrid engines and other mainstream models were analyzed and compared. Torque refers to the magnitude of the moment in physics, which is equal to the product of force and moment arm, so it is also called torque or torque. The torque of a car engine refers to the torque that the engine outputs from the crankshaft side. Its exact definition is: Pistons in the cylinder to do reciprocating motion, each reciprocating will do some work, the work done in each unit distance is the torque. Correspondingly, in each unit