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UNIT 7 THE POWER TRAIN

UNIT 7 THE POWER TRAIN. 蒋 芳 吴喜骊. Basic Content. Aims and Requirements New Words Phrases and Expressions Notes to the Text Specialized Knowledge Exercises. Aims and Requirements. List the components of power train Describe tasks of a clutch Explain how a clutch engages and releases

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UNIT 7 THE POWER TRAIN

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  1. UNIT 7 THE POWER TRAIN 蒋 芳 吴喜骊

  2. Basic Content Aims and Requirements New Words Phrases and Expressions Notes to the Text Specialized Knowledge Exercises

  3. Aims and Requirements List the components of power train Describe tasks of a clutch Explain how a clutch engages and releases Explain how a manual transmission works List types of universal joints

  4. New Words clutch [] n. 离合器 essential [] adj. 本质的，主要的 Transmission[] n. 传动，传送 interrupt [] vt. 阻止，打扰 install [in5stC:l] v. 安装，装配 gearbox [] n. 齿轮箱，变速箱 disengage [] v. 分离，断开，切断 surely [] adj. 的确，当然 mileage [] n. 汽车消耗一加仑汽 油所行驶的平均里程

  5. New Words classify [] vt. 分类，分级 immerse [i5mE:s] v. 浸入，浸渍，泡 cable [] n. 绳，缆，钢索 hydraulic [] adj. 液压的 gearshift [] n. 换档，变速器 comprise [] vt. 包括，由…组成 non-synchronous[] adj. 异步的 variable [] n. 变量，变数 hydrostatic []adj. 液压静力的 layshaft [5leFB:ft] n. 副轴，中间轴

  6. New Words differential [] n. 差速器 coasting [] n. 滑行，惯性运动 motionless [] adj. 不动的，静止的 collar [] n. 法兰盘，联轴节，轴衬 neutral [5nju:trEl] n. 空档

  7. Phrases and Expressions manual transmission 手动变速器 a split second 一瞬间，一刹那 single plate friction clutch 单片式摩擦离合器 multiple plate friction clutch多片式摩擦离合器 release fork 释放叉，分离叉 throw-out bearing 分离轴承，推力轴承 diaphragm spring 膜片弹簧 pressure plate 压盘 clutch disc 离合器从动盘 gear ratio 齿数比，齿轮传动比

  8. Phrases and Expressions switch to 转到，换到 brake band 制动带 forward gear 前进档 reverse gear 倒档 spline shaft 花键轴 drive shaft 传动轴

  9. Notes to the Text [1] Of which one shaft is usually driven by a motor or pulley, while the other shaft is meant to drive a device. 两轴中的一个轴，通常是由发动机或带轮驱动的，而另一根轴用于驱动其它设备。

  10. Notes to the Text [2] Further, they can also be classified as “wet” or “dry” depending on whether they are immersed in a lubricating fluid or not. 而且，离合器依据是否浸在油中而分为湿式和干式两种。

  11. Notes to the Text [3] A manual transmission system is known by several different terms such as standard transmission, stick shift, stick, or straight drive. 手动变速箱有几种不同的名称，如：标准传动、手动换档、手动档、直接传动等。

  12. Notes to the Text [4] Teeth on the collar fit into holes on the sides of the blue gears to engage them. 套筒上的齿刚好卡进蓝色齿轮上的孔，以便和蓝色齿轮啮合。

  13. Notes to the Text [5] Both of the blue gears freewheel on the yellow shaft at the different rates controlled by their ratios to the layshaft. 两个蓝色齿轮都在黄色轴上自由转动，速率是由中间轴上的齿轮和蓝色齿轮间的变速比决定的。

  14. Specialized Knowledge Fig.7-1 Clutch 1-Clutch 2-Disc 3-Flywheel 4-Crankshaft 5-Bushing 6-Rear main seal 7-Transmission input shaft 8-Bearing retainer 9-Release bearing 10-Release fork 11-Input shaft seal

  15. Specialized Knowledge Fig.7-2 Clutch pedal is pressed

  16. Specialized Knowledge Fig.7-3 How manual transmission work

  17. Specialized Knowledge Fig.7-4 Propeller shaft Fig.7-5 Cross type joint

  18. Specialized Knowledge Fig.7-6 Constant velocity universal joint

  19. Exercises (1) Why do we need the clutch? (2) Do you know the main job of the clutch? (3) Can you classify clutches? (4) How do you classify clutches? (5) How does the clutch work? (6) How does the clutch engage and release? (7) What is the difference between manual and automatic transmission?

  20. Exercises (8) How does manual transmission work? (9) What is the purpose of the collar? (10) When is the transmission in neutral?

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