ECD SYSTEM


  1. FUNCTION


    1. The ECM controls the swirl control valve position to improve torque in the low engine speed range and to optimize exhaust emissions.

    2. The ECM determines the swirl control valve position based on the engine conditions (engine speed and accelerator pedal effort). Then, it switches the vacuum applied to the actuator diaphragm via the VSV, in order to open and close the swirl control valve.

    3. In the low engine speed range, the ECM closes the swirl control valve to strengthen the swirl in the combustion chamber, thus promoting the mixture of fuel and air and stabilizing combustion.

    4. When the engine speed increases to the low or middle-speed range, the ECM fully opens the swirl control valve.

      B002N0QE06