Principal Components(汽车主要组成部分)Todays average car contains more than 15,000 separate, individual parts that must work together. These parts can grouped into four major categories: engine, body, chassis and electrical equipment.现代汽车有超过15000个零件组成，分成几个必须在一起工作的功能部分。主要包括4个功能部分：引擎，车身，底盘和电控。 引擎Engine引擎1、The engine acts as the power unit. 引擎为汽车提供能源。2、 The internal combustion engine is most common: this obtains its power by burning a liquid fuel inside the engine cylinde
