Chapter One Unit Three Engine Cooling System

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Chapter One Unit Three Engine Cooling System

• Step I. Duty Report
• Step II. Review
• Review what they learnt in the last class
• the function of the connecting rods and
  crankshaft
• the main units of the connecting rods and
  crankshaft, and their main functions.
• Recite the new words
• Step III. Reading material
• Ask the students read the whole text and get the
  main idea
• Discuss about the text

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Engine Cooling System

• Step IV. Engine cooling system
• New words
• Check the pronunciation of the new words
• main usage of the words

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Engine Cooling System

• Structure
• The purpose keep the engine at its most
  efficient operating temperature at all speeds
  under all driving conditions. (passage 1)
• Why we need a cooling system. (passage 2)

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Engine Cooling System
Two different types
Liquid (water) Cooling
air Cooling
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Engine Cooling System

• water cooling system

radiator ???
thermostat ???
fan ??
Water jacket ??
Coolant pump ???(?)?
Coolant recovery system ???????
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Engine Cooling System
Air cooling system
Little circulation (???) Full circulation (???)
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Engine Cooling System

• Step V. Exercise
• Ask the students translate some passages
• Ask the students describe the main units of the
  cooling system, and their main functions