Chapter One Unit Two Connecting rods and Crankshaft

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Chapter One Unit Two Connecting rods and
Crankshaft
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Connecting rods and Crankshaft

• Step I. Duty Report
• Step II. Review
• Review what they learnt in the last class
• Mention the classification of engine
• Four stroke of engine
• Main components of an automobile
• 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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Connecting rods and Crankshaft

• Step IV. Connecting rods and crankshaft
• New words Check the pronunciation of the new
  words and main usage of the words
• Text
• Structure Main components of the power mechanism
  which called the crankshaft and connecting rod
  assembly. (passage 1)
• Function to convert thermal energy into
  mechanical energy used to drive the vehicle.
  (passage 2-3)
• Introduction of the piston (passage 4)
• Connecting rod (passage 5)
• crankshaft (passage 6-8)
• conclusion (passage 9)

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Connecting rods and Crankshaft

• Step V to study the skills for translating
  special English
• 1. ?????????
• ??????????????, ??????????, ????????????,
  ????????????.

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Connecting rods and Crankshaft

• As with the locomotive bogie, the coach bogie is
  a four-wheel or six-wheel truck, supporting the
  coach-end through the medium of a pivot, and with
  freedom to swing.
• ????????, ?????????????, ???????????, ????????.

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Connecting rods and Crankshaft

• In the earlier days of railways, the rules laid
  down that no train should be allowed to start,
  even if all signals were clear, until the
  stationmaster had authorized the guard to give
  the driver the night way.
• ????????, ?????????????, ???????-----?????????????
  ?????????.

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Connecting rods and Crankshaft

• ?. ???
• ??????????????????.??????????????????????????,????
  ???????????????????????????.

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Connecting rods and Crankshaft

• The shrinkage of the sun to this state would
  transform our oceans into ice and our atmosphere
  into liquid air.
• ???????????, ????????, ????????.
• The accumulation of new data during the past
  decade has brought a refinement of some earlier
  views and concepts.
• ??????, ??????????, ???????????????.

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Connecting rods and Crankshaft

• Step VI. Exercise
• Ask the students to translate some passages.
• Ask the students to describe the main units of
  the connecting rod and crankshaft as well as
  their main functions.