《汽车专业英语》课程教学资源（PPT课件讲稿，英文版）UNIT 11 SUSPENSION AND STEERING SYSTEMS

PROFESSIONAL ENGLISH UNIT 11 SUSPENSION AND STEERING SYSTEMS TEXTA Basic Parts and Types of the Suspension and Steering Systems

UNIT 11 SUSPENSION AND STEERING SYSTEMS TEXT A Basic Parts and Types of the Suspension and Steering Systems PROFESSIONAL ENGLISH

本次课学习内容 TEXT A Basic Parts and Types of the suspension and Steering Systems e Basic Suspension System Components· Types ● Steering Systen ● Steering Gear· Power Steering

TEXT A Basic Parts and Types of the Suspension and Steering Systems • Basic Suspension System • Components • Types • Steering System • Steering Gear • Power Steering 本次课学习内容

本次课学习目标 ●掌握转向与悬架系统的英文专业词汇 ●掌握转向与悬架系统主要类型 ●训练快速阅读能力,提高阅读速度

本次课学习目标 ⚫ 掌握转向与悬架系统的英文专业词汇 ⚫ 掌握转向与悬架系统主要类型 ⚫ 训练快速阅读能力，提高阅读速度

NEW WORDS Jarring [dari]a刺耳的 contour ["kntu]n轮廓,等高线 anchorage[' zenkeri3]n停泊地,抛锚地,固定(支座) unibody [juni"bdi]n整体式车身 obsolete [ belit]a荒废的,陈旧的 ump [bAmp] n凸起,(曲线)拐点,肿块, 撞击 rebound [ri" baund]n.&v回弹 descend [di'send]v下来,下降 oscillation [ silesian]n摆动,振动,振荡 deplete [di pli:t] v耗尽,减少,放空 strut [strAt] n滑柱,支柱 Impose [im'pauz]v.强加,征税

NEW WORDS jarring ['dƷɑ:riŋ] a.刺耳的 contour ['kɔntuə] n.轮廓，等高线 anchorage ['æŋkəridƷ] n.停泊地，抛锚地，固定(支座) unibody ['ju:ni'bɔdi] n.整体式车身 obsolete ['ɔbsəli:t] a.荒废的，陈旧的 bump [bʌmp] n.凸起，（曲线）拐点，肿块， 撞击 rebound [ri'baund] n. & v.回弹 descend [di'send] v.下来，下降 oscillation [ֽ ɔsi'lei∫ən] n.摆动，振动，振荡 deplete [di'pli:t] v.耗尽， 减少，放空 strut [strʌt] n.滑柱，支柱 impose [im'pəuz] v.强加，征税

rest [rest] n静止,支持物,其余,其他; v搁在,保持(状态) soften 'so()fn]V.(使)变柔软,(使)变柔和 knuckle [nAkl] n关节,转向节 pedestal [ pedis]n底座,基础 squeak [skwi:k] n尖叫声,吱吱声;v发出尖叫声 damper [ damps]n减振器,缓冲器 confine [" konfain]v限制;n界限,边界 transverse [" traenzve:s]a横向的,横断的 parallelogram[ paera'lelagr n平行四边形 ce late-model [" leit'm。d]a新型的 bolster [" ballista]w支持,加强;n垫子 ease Z n安逸,不费力;v使悠闲,减轻 pitman pitman]n矿工;连接杆

rest [rest] n.静止，支持物，其余，其他； v.搁在，保持(状态) soften ['sɔ(:)fn] v.（使）变柔软， (使)变柔和 knuckle ['nʌkl] n.关节，转向节 pedestal ['pedistl] n.底座，基础 squeak [skwi:k] n.尖叫声，吱吱声；v.发出尖叫声 damper ['dæ mpə] n.减振器，缓冲器 confine ['kɔnfain] v.限制；n.界限，边界 transverse ['træ nzvə:s] a.横向的，横断的 parallelogram [ֽpæ rə'leləgr æ m] n.平行四边形 late-model ['leit'mɔdl] a.新型的 bolster ['bəulstə] v.支持，加强；n.垫子 ease [i:z] n.安逸，不费力；v.使悠闲，减轻 pitman ['pitmən] n.矿工；连接杆

PHRASES AND EXPRESSIONS make turns 偏转 steel frame 钢梁车架 leaf spring 叶片弹簧 coil spring 螺旋弹簧 torsion bar 扭杆弹簧 air spring 空气弹簧 ride quality 乘坐舒适性 shock absorber 减振器 curb height 全装备高度 control arm 悬架摆臂 solid axle 整体式车桥 conventional front传统式前悬架 suspension

PHRASES AND EXPRESSIONS make turns 偏转 steel frame 钢梁车架 leaf spring 叶片弹簧 coil spring 螺旋弹簧 torsion bar 扭杆弹簧 air spring 空气弹簧 ride quality 乘坐舒适性 shock absorber 减振器 curb height 全装备高度 control arm 悬架摆臂 solid axle 整体式车桥 conventional front suspension 传统式前悬架

Macpherson strut front 麦弗逊滑柱式前悬架 suspension rubber bumper 橡胶缓冲垫 steering knuckle 转向节 dependent suspension 非独立悬架 dead axle 从动桥,非驱动桥 steering wheel 转向盘 steering gear 转向器 parallelogram linkage 平行四杆机构 rack-and- pinion steering systen齿轮齿条式转向系统 steering shaft 转向轴 manual steering 人力转向 power steering 动力转向 pitman arm 转向摇臂

Macpherson strut front suspension 麦弗逊滑柱式前悬架 rubber bumper 橡胶缓冲垫 steering knuckle 转向节 dependent suspension 非独立悬架 dead axle 从动桥，非驱动桥 steering wheel 转向盘 steering gear 转向器 parallelogram linkage 平行四杆机构 rack-and-pinion steering system 齿轮齿条式转向系统 steering shaft 转向轴 manual steering 人力转向 power steering 动力转向 pitman arm 转向摇臂

Basic Parts and Types of the Suspension and Steering Systems Suspension System If a vehicle's axles were bolted directly to its frame or body, every rough spot in the road would transmit a jarring force throughout the vehicle Riding would be uncomfortable, and handling at freeway speeds would be impossible. The fact that the modern vehicle rides and handles well is a direct result of a suspension system Even though the tires and wheels must follow the road contour, the body should be influenced as little as possible [1 The purpose of any suspension system is to allow the body of the vehicle to travel forward with a minimum amount of up and-down movement. The suspension should also permit the vehicle to make turns without excessive body roll or tire skidding

Basic Parts and Types of the Suspension and Steering Systems Suspension System If a vehicle's axles were bolted directly to its frame or body, every rough spot in the road would transmit a jarring force throughout the vehicle. Riding would be uncomfortable, and handling at freeway speeds would be impossible. The fact that the modern vehicle rides and handles well is a direct result of a suspension system. Even though the tires and wheels must follow the road contour, the body should be influenced as little as possible [1]. The purpose of any suspension system is to allow the body of the vehicle to travel forward with a minimum amount of up￾and-down movement. The suspension should also permit the vehicle to make turns without excessive body roll or tire skidding

Suspension System Components Vehicle frame A vehicle's frame or body must form a rigid structural foundation and provide solid anchorage points for the suspension system there are two types of vehicle construction in common use today: body over-frame construction which uses a separate steel frame to which the body is bolted at various points and unibody construction, in which the body sections serve as structural members. Unibody construction is the most common but body-over-frame construction is still used on pickup trucks and large cars Springs The springs are the most obvious part of the suspension system Every vehicle has a spring of some kind between the frame or body and the axles. there are three types of springs in general use today leaf spring coil spring and torsion bar. two different types of springs can be used on one vehicle. Air springs were once used in place of the other types of springs but are now obsolete. Many modern vehicles have air-operated suspensions but they are used to supplement the springs

Suspension System Components Vehicle Frame A vehicle's frame or body must form a rigid structural foundation and provide solid anchorage points for the suspension system. There are two types of vehicle construction in common use today: body￾over-frame construction, which uses a separate steel frame to which the body is bolted at various points and unibody construction, in which the body sections serve as structural members. Unibody construction is the most common, but body-over-frame construction is still used on pickup trucks and large cars. Springs The springs are the most obvious part of the suspension system. Every vehicle has a spring of some kind between the frame or body and the axles. There are three types of springs in general use today: leaf spring, coil spring, and torsion bar. Two different types of springs can be used on one vehicle. Air springs were once used in place of the other types of springs, but are now obsolete. Many modern vehicles have air-operated suspensions, but they are used to supplement the springs

Shock absorbers When the vehicle is traveling forward on a level surface and the wheels strike a bump the spring is rapidly compressed (coil springs)or twisted (leaf springs and torsion bars). The spring will attempt to return to its normal loaded length In so doing it will rebound causing the body of the vehicle to be lifted Since the spring has stored energy, it will rebound past its normal length. The upward movement of the vehicle also assists in rebounding past the spring s normal length The weight of the vehicle then pushes the spring down after the spring rebounds. The weight of the vehicle will push the spring down but since the vehicle is traveling downward, the energy built up by the descending body will push the spring below its normal loaded height. This causes the spring to rebound again. This process called spring oscillation, gradually diminishes until the vehicle is finally still. Spring oscillation can affect handling and ride quality and must be controlled

Shock Absorbers When the vehicle is traveling forward on a level surface and the wheels strike a bump, the spring is rapidly compressed (coil springs) or twisted (leaf springs and torsion bars). The spring will attempt to return to its normal loaded length. In so doing, it will rebound, causing the body of the vehicle to be lifted. Since the spring has stored energy, it will rebound past its normal length. The upward movement of the vehicle also assists in rebounding past the spring's normal length. The weight of the vehicle then pushes the spring down after the spring rebounds. The weight of the vehicle will push the spring down, but since the vehicle is traveling downward, the energy built up by the descending body will push the spring below its normal loaded height. This causes the spring to rebound again. This process, called spring oscillation, gradually diminishes until the vehicle is finally still. Spring oscillation can affect handling and ride quality and must be controlled