问汽车四大组成（车身，底盘，发动机，电气设备）

车身： vehicle body例句：Application of“ODS”Method to Dynamic Analysis of Vehicle Body Structure底盘：Chassis 例句：A Microcomputer Diagnosis System for Automobile Chassis Fault发动机：engine 柴油机：diesel engine 例句： Study of Electrical Control System for Engine电气设备：electrical equipment进气冲程：intake stroke例句： The other fuel is injected in the intake stroke, which enhances the gas mixture concentration around the spark plug during ignition.压缩冲程：compression stroke做功冲程：apply stroke排气冲程：exhaust stroke注：冲程也可以用 cycle