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1、UNIT SEVEN BODY,UNIT SEVEN BODY,TEXT A Body & Chassis TEXT B Suspension of a Car TEXT C Tire TEXT D Power Seats,了解与汽车车身和底盘的相关知识， 掌握有关词汇词组,掌握车架、轮胎、悬挂和电动座椅 等英语的习惯表达方法,学习目标,UNIT FIVE BRAKING,会看汽车车身和底盘方面的文章,会查找相关资料,能力目标,UNIT FIVE BRAKING,TEXT A Body & Chassis,TEXT A Body & Chassis,汽车的箱体部分，是汽车两大组成部分之一（另一
2、部分为汽车底盘）。轿车和客车的车身是整体的；大部分货运汽车、越野汽车和专用汽车的车身分为驾驶室和货箱两部分。,Body An automobile body(Fig.7.1)is a sheet metal shell with windows,doors,a hood,and a trunk deck built into it1.It provides a protective covering for the engine,passengers,and cargo2.The body is designed to keep passengers safe and comfortable.
3、The body styling provides an attractive,colorful,modern appearance for the vehicle.,TEXT A What Is Battery,TEXT A What Is Battery,Chassis The chassis is an assembly of those systems that are the major operating part of a vehicle.The chassis includes the transmission,suspension,steering,and brake sys
4、tems. Transmission systemsconveys the drive to the wheels.The main components are clutch,gearbox,driveshaft,final drive,and differential. .,TEXT A What Is Battery,Suspensionabsorbs the road shocks. Steeringcontrols the direction of the movement. Brakeslows down the vehicle. 1 withbuilt into it:是指“车身
5、上有”。 2it指车身。,TEXT A What Is Battery,词汇学习,TEXT A What Is Battery,词汇学习,TEXT A What Is Battery,参考译文,车身和底盘 车身 汽车车身(图7.1)是一个金属板壳,包括：车窗、车门、发动机罩和行李舱盖。汽车车身保护着发动机，乘客和货物。车身的设计应使得乘客安全和舒适。车身的外表使得汽车具有吸引人的、五彩缤纷的和现代的外表。 底盘 底盘是汽车上主要操作系统组成的一个总成。底盘包括传动系，悬挂、转向以及制动系统。,TEXT A What Is Battery,参考译文,传动系统把动力输送到车轮。主要零部件有离合器、
6、变速器、主传动轴、主减速器和差速器。 悬挂吸收路面震动。 转向控制运动的方向。 制动使车辆减速。,TEXT A What Is Battery,TEXT A What Is Battery,知识拓展,思考练习,翻译下列词组： 1、吸引人的、五彩缤纷的和现代的外表 2、汽车上主要操作系统组成的一个总成 将下面的短文翻译成中文： The job of a car suspension is to maximize the friction between the tires and the road surface.,TEXT A What Is Battery,TEXT B Suspension
7、 of a Car,TEXT B Suspension of a Car,悬挂系统是汽车上的一个非常重要的系统。它不但影响汽车的乘坐舒适性（平顺性）、还对其他性能诸如通过性、稳定性以及附着性能都有重大影响。,The suspension(Fig.7.2)of a car is actually part of the chassis,which comprises all of the important systems located beneath the cars body. These systems include: The framestructural,loadcarrying
8、component that supports the cars engine and body 1.,TEXT B Suspension of a Car,The suspension systemsetup that supports weight,absorbs and dampens shock2. The steering systemmechanism that enables the driver to guide and direct the vehicle The tires and wheelscomponents that make vehicle motion poss
9、ible by way of grip and/or friction with the road,TEXT B Suspension of a Car,TEXT B Suspension of a Car,1定语从句“that supports the cars engine and body”是指“支撑发动机和车身的框架”，也可以翻译成“承载的框架,支撑发动机和车身”。 2直译是“使驾驶员能够操纵和指引车辆的行驶方向的机械装置”。可以在翻译时省略“的机械装置”。,TEXT B Suspension of a Car,词汇学习,TEXT B Suspension of a Car,参考译文,
10、汽车悬挂系统 悬架实际上是底盘的一部分，底盘包含车身内的所有重要系统。 其中包括： 车架承载的框架，支撑发动机和车身。 悬挂支撑重量、吸收冲击、减小振动。 转向系统使驾驶员能够操纵和指引车辆的行驶方向。 车轮与轮胎利用轮胎与路面间的摩擦或附着力使车辆行驶。,TEXT B Suspension of a Car,知识拓展,TEXT B Suspension of a Car,下图是一个双向作用筒式减振器结构。它由三个同心缸筒组成，外层为防尘罩，中间为储油缸筒，内层为工作缸筒。当车轮相对车身(car frame)以较低速度上下振动时，希望减振器(dampers:shock absorber)具有较
11、大阻尼，以充分发挥其减振作用；而当车轮相对车身以较高速度上下振动时，却要求减振器产生小阻尼，以避免将路面的过大冲击经减振器传给车身。,思考练习,翻译下列词组： 1、吸收冲击 2、车轮与轮胎 将下面的短文翻译成中文： The job of a car suspension is to maximize the friction between the tires and the road surface.,TEXT B Suspension of a Car,TEXT C Tire,轮胎:在各种车辆或机械上装配的接地滚动的圆环形弹性橡胶制品。它通常安装在金属轮辋上，能支承车身，缓冲外界冲击，实现
12、与路面间的接触并保证车辆的行驶性能。,TEXT C Tire,Tires(Fig.7.3)have two functions. First,they interpose a cushion between the road and the car wheels to absorb shocks resulting from irregularities in the road1.The tires flex,or give2,as bumps are encountered,thus reducing the shock effect to the passengers in the car
13、.Second,the tires provide frictional contact between the wheels and the road so that good traction is secured3.,TEXT C Tire,This permits the transmitting of power through the tires to the road for rapid accelerating,combats the tendency of the car to skid on turns,and allows quick when the brakes ar
14、e applied. Tires are of two basic types,solid and pneumatic(air-filled).Solid tires have very limited usage,being confined largely to specialized industrial applications.,TEXT C Tire,Pneumatic tires are of two types,those using an inner tube and the tubeless type.The amount of air pressure used depe
15、nds on the type of tire and operation.Passengercar tires are inflated to about 275 to 413 kPa.Air is introduced into the tire(or inner tube)through a valve that opens when the chuck on the air hose if applied4.On the tire with an inner tube,the valve is mounted.,TEXT C Tire,On the tubeless tire,the
16、valve is mounted on the wheel rim. 1第二句较长，可以采用拆句顺译，拆成短句，并符合原英文顺序，“首先，轮胎是路面和车轮间的软垫，它吸收了路面颠簸带来的冲击”。 2give vt.给,授予，供给； n.弹性,可弯性。 这里指的是轮胎的可弯性、弹性。 3当车轮驱动力超过附着力时，车轮就会滑转。因此,汽车行驶的充分条件是：必须有为良好的附着。,TEXT C Tire,4Air is introduced into the tire(or inner tube)through a valve that opens when the chuck on the air hose if applied.直译是“空气引入到轮胎（或内胎） ，通过一个阀打开时，夹头对空气软管，如果适用。”显然不通，因此把译文改为“把导入空气的橡胶管夹在气门上，空气就被打入轮胎（或内胎）。”,TEXT C Tire
