The vane/flap type air flow meter

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  • The vane/flap type air flow meter
    • Bosch L-Jetronic and early Motronic EFI systems or Hitachi measure air volume
    • Hot wire and hot film air mass meters measure speed of air flow
    • Includes a spring which returns the internal flap to the initial position
    • Sometimes if the spring is tensioned too tightly, it can restrict the incoming air and it would cause the intake air speed to increase when not opened fully


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