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Engine Lubrication System

Engine Lubrication System. Engine Lubrication System. Step I. Duty Report Step II. Review Review what they learnt in the last class The purpose of using a cooling system two different types and their main differences Recite the new words Step III. Reading material

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Engine Lubrication System

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  1. Engine Lubrication System

  2. Engine Lubrication System • Step I. Duty Report • Step II. Review • Review what they learnt in the last class • The purpose of using a cooling system • two different types and their main differences • Recite the new words • Step III. Reading material • Ask the students read the whole text and get the main idea • Discuss about the text

  3. Engine Lubrication System • Step IV. Engine Lubrication System • New words: • Check the pronunciation of the new words • main usage of the words • Text: • We can reduce friction to a considerable degree by the use of lubrication oil.

  4. Engine Lubrication System Types of friction Dry friction Boundary friction Liquid friction

  5. Engine Lubrication System • lubrication oil: the four main function • a protective coating • absorb and carry the heat • wash off dirt • absorb shocks

  6. Engine Lubrication System • What’s lubrication oil made from? • Two types of engine lubricating systems • splash • pressure/force feed • combination of the two types • main function (passage 8) • main units (passage 9-17)

  7. Engine Lubrication System Splash lubrication （飞溅润滑） Pressure lubrication （压力润滑） Grease lubrication （润滑脂润滑）

  8. Engine Lubrication System • Step V. Exercise • Ask the students translate some passages • Ask the students describe the main units of the lubrication system, and their main functions

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