SFI SYSTEM


  1. SYSTEM CONTROL


    1. The ETCS-i which provided, provides excellent throttle control in all operating ranges, is used.

    2. The ETCS-i uses the ECM to calculate the optimal throttle valve opening angle that is appropriate for the respective driving conditions and uses a throttle control motor to control the opening angle.

    3. The ETCS-i controls the idle speed and Traction Control (TRC) and Vehicle Stability Control (VSC) systems.

    4. If malfunction is detected, this system switches to the fail-safe mode.

    5. The ETCS-i effects coordinated control with the VALVEMATIC system.

      A001N6JE01

  2. FUNCTION


    1. The ECM drives the throttle control motor by determining the target throttle valve opening in accordance with the respective operating conditions.

    2. The ECM controls the throttle to an optimal throttle valve opening that is appropriate for driving conditions such as the accelerator pedal opening angle and the engine speed in order to achieve excellent throttle control and comfort in all operating ranges.

      Figure 1. Control Examples during Acceleration and Deceleration

      A001MXPE45

    3. The ECM controls the throttle valve in order to constantly maintain an ideal idle speed.

    4. As part of the TRC system, the throttle valve is closed by a request signal from the skid control ECU if an excessive amount of slippage is created at a driving wheel, thus facilitating the vehicle in ensuring stability and driving force.

    5. In order to increase the effectiveness of the VSC system control, the throttle valve opening angle is controlled by performing coordinated control effecting a coordination control with the skid control ECU.

    6. The ECM controls the throttle valve in accordance with the operating conditions of the VALVEMATIC system.