SFI SYSTEM


  1. FUNCTION


    1. EFI-L, which uses an intake mass air flow meter sub-assembly to detect intake air volume and subsequently control fuel injection volume, is used.

    2. Synchronous injection timing (1 injection per cylinder for every 2 crankshaft rotations) is used.

    3. There are 2 fuel injection modes, a synchronous injection and asynchronous injection. In synchronous injection, the basic injection duration is corrected based on signals from each sensor to always inject fuel at the same position. In asynchronous injection, fuel is injected at the point the injection request is detected according to signals from each sensor regardless of the crankshaft angle. In addition, to protect the engine and improve fuel efficiency, a fuel cut that stops fuel injections will be implemented according to the operating conditions.

      A001N77E01

    4. Fuel injection is stopped to protect the engine and improve fuel efficiency.

      Fuel Cut
      Fuel Cut Off During Deceleration If the engine speed is above a standard value when decelerating (when the ECM determines that the throttle is off), the fuel injection is stopped to prevent overheating of the catalyst by misfiring, and to improve fuel efficiency. If the engine coolant temperature is low, the fuel cut speed and restoration speed with be increased.
      Fuel Cut According to Engine Speed If the engine speed is higher than a standard value, fuel injection is stopped to prevent excessive speed.
      Fuel Cut When Shifting from "N" to "D" If the engine speed is higher than a standard value, fuel injection is stopped when the shift lever is operated to protect the CVT.
      Fuel Cut Speed at High Engine Speed
      Engine Speed (rpm) 6600 or more