1. Electronic Fuel Injection System

2. Chapter Three Unit Two Electronic Fuel Injection System Step I. Duty Report Step II. Review Review what they learnt in the last class why we need an electronic control system what’s the function of electronic control system what’s the development of it how does it work Recite the new words

3. Chapter Three Unit Two Electronic Fuel Injection System Step III. Reading material Ask the students read the whole text and get the main idea Discuss about the text Step IV. Electronic fuel injection system New words: Check the pronunciation of the new words main usage of the words

4. Chapter Three Unit Two Electronic Fuel Injection System Structure: Put forward a problem which can’t be solved by mechanical device.(passage 1-6) The solution to the problem: a carbureted system with electronic fuel injection. (passage 7) EFI can be broken down to three subsystem (passage 8)

5. Chapter Three Unit Two Electronic Fuel Injection System

6. Chapter Three Unit Two Electronic Fuel Injection System what’s EFI (passage 9) How does it works (passage 10) three methods of regulating the quantity of fuel injected (passage 11) throttle body injection (passage 12-16)

7. Chapter Three Unit Two Electronic Fuel Injection System

8. Chapter Three Unit Two Electronic Fuel Injection System

9. Chapter Three Unit Two Electronic Fuel Injection System Step V. Exercise Ask the students translate some passages Ask the students describe the main units of the electronic fuel injection system, and their main functions