汽车构造英文版7

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汽车构造英文版7CHAPTER 1 AUTOMOTIVE BASICS 1.1 Principal Components Todays average car contains more than 15，000 separate， individual parts that must work together.CHAPTER 1 AUTOMOTIVE BASICS1.1   Principal ComponentsTodays 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.1.2   EngineThe engine acts as the power unit. The internal combustion engine is most common: this obtains its power by burning a liquid fuel inside the engine cylinder. There are two types of engine :gasoline(also called a spark-ignition engine) and diesel(also called a compression-ignition engine).Both engines are called heat engines; the burning fuel