汽车专业英语(第二版)课件 (1)[13页]

dy of the car is the outer shell that surrounds the mechanical parts and the passengers inside. Most bodies are made of steel, although some parts are made of strong plastic or carbon fiber. While the body forms the passenger compartment, offers storage space, and houses the automobile's systems, it has other important functions as well. In most instances, the solid structure of body protects passengers from the force of an accident. Other parts of the car, such as the front and hood, are designed to crumple easily, thereby absorbing much of the impact of a crash. A firewall between the engine and the interior of the car protects passengers in case of a fire. Lastly, the body's design helps to reduce the level of wind resistance as the car moves, allowing the driver better handling ability and improving the efficiency of the engine.
〉 Overall, these parts are arranged into four semi-independent categories: engine, body, chassis and electrical equipment, each with a different function. For example, the engine—the “heart” of the automobile—is comprised of pistons, cylinders, tubes which is used to deliver fuel to the cylinders, and other components. The overall structure of modern automobile is shown as Fig. 2.
Types of automobile
• According to functionality, automobiles can be divided into several types, which are shown as Fig. 1.
• Fig. 1 Types of Automobiles
Fig. 2 Over structure of the automobile
Engine
〉 The engine operates on internal combustion, meaning the fuel used for its power is burned inside of the engine. Now that engine is a collection of advanced parts and systems that provide the driving force to get people down the road. Modern electronics and materials may have made engines more complicated, but the basic engine layout has not really changed over the years. Most automotive engines are located at the front of the vehicle and drive the wheels through a power train made up of gears, shafts, and other mechanical and hydraulic components. The fourstroke engine is the most common type of automobile engine.
Main system of automobile
〉 Thousands of individual parts make up the essential components of the modern automobile. Much like the human body, these parts are arranged into several systems, each with a different function. Every system is necessary for driving the automobile, keeping it safe, and reducing noise and pollution.
Overview
Automobile Overview
Automobile Overview
• Since the moment of its birth, automobile has had a strong influence on the history, economy, and social life of much of the world. Nowadays, modern automobile industry stands for the advance level of a nation's manufacturing industry development. Mass-production techniques, for instance, first developed for the automobile, have been adapted for use in nearly every industry. Meanwhile, dozens of industries depend, directly or indirectly, on the automobile. These industries include producers of steel and other metals, plastics, rubber, glass, fabrics, petroleum products, and electronic components.