SFI SYSTEM


  1. FUNCTION


    1. By switching the vacuum switching valve on and off based on the engine speed signal sent by the ECM, vehicle speed and engine torque, the amount of vacuum between the vacuum pump assembly and rear engine mounting insulator is controlled.

    2. When the vacuum switching valve is off, vacuum is not applied to the front and rear engine mounting insulator and the diaphragm is closed. At this time, liquid passes through the ride comfort orifices, enhancing the damping force.

    3. When the vacuum switching valve is on, vacuum is applied to the front and rear engine mounting insulator and the diaphragm is open. At this time, liquid passes through the idle/lock-up orifice, reducing the spring constant.

      B0023NNC01
      *1 ECM *2 Vacuum Switching Valve
      *3 Vacuum Pump Assembly *4 Engine
      *5 Front Engine Mounting Insulator *6 Rear Engine Mounting Insulator
      *a Ride Comfort Orifice *b Idle/lock-up Orifice
      *c Diaphragm - -