ASC SYSTEM SYSTEM DESCRIPTION


  1. ASC SYSTEM


    1. The ASC system uses the stereo component equalizer assembly to generate dynamic engine sounds electronically. These sounds are output from the No. 1 speaker assembly with box and the No. 2 speaker assembly with box. The dynamic engine sounds are calculated in accordance with vehicle information, such as the drive mode, vehicle speed, shift lever position and accelerator pedal opening angle.

    2. The following sounds are generated.

      Sound Description
      Additional Engine Sounds

      • Specially designed engine sounds which are synchronized with the engine speed and output when the vehicle is being driven.

      • Generated when the vehicle speed is 6 km/h (4 mph) or more and engine speed is 980 rpm or more.
      Intake Flow Noise

      • Specially designed intake flow noise which is output when the throttle valve is opened rapidly and intake airflow increases.

      • Generated when the engine is running and the accelerator pedal is depressed rapidly.
      Exhaust Pulsation Sound

      • Specially designed exhaust pulsation sound which simulates the sound of unburned exhaust gases combusting in and around the exhaust pipe.

      • Generated when the vehicle is being driven with the accelerator pedal depressed, and the accelerator pedal is suddenly released.

      1. Additional engine sounds generation conditions

        Item Condition Remark
        Drive mode SPORT S mode SPORT S+ mode -
        Shift lever position R, D, M -
        Vehicle speed 6 km/h (4 mph) or more When all of the conditions are met, additional engine sounds are generated.
        Engine speed 980 rpm or more
        Sounding Speaker No. 2 Speaker with Box Assembly

        No. 1 Speaker with Box Assembly

        No. 2 Speaker with Box Assembly

        		 -
        A01XQ5WC02
        *a Example of additional engine sounds generation *b Vehicle speed
        *c Time *d Accelerating
        *e Decelerating *f When vehicle being driven
        *g 6 km/h (4 mph) *h 980 rpm or more
        *i Less than 980 rpm *j Sounds output

      2. Intake flow noise generation conditions

        Item Condition Remark
        Drive mode SPORT S+ mode -
        Shift lever position P, R, N, D, M -
        Vehicle speed 0 km/h (0 mph) or more and 1 km/h (1 mph) or less, or more than 100 km/h (62 mph) and 250 km/h (155 mph) or less -
        Engine speed Between 1300 rpm and 5000 rpm -
        Accelerator pedal opening angle

        Opening angle range:

        Between 15% and 70%

        Condition:

        When the accelerator pedal opening angle increases 15% or more in 0.01 seconds

        		 To generate additional intake flow noise again, decrease the accelerator pedal opening angle to below 10%.
        Gear - -
        Sounding Speaker No. 1 Speaker Assembly with Box -

      3. Exhaust pulsation sound generation conditions

        Item Condition Remark
        Drive mode SPORT S+ mode -
        Shift lever position D, M -
        Vehicle speed 80 km/h (50 mph) or more -
        Engine speed - -
        Accelerator pedal opening angle From 80% or more to 0% within 0.45 seconds -
        Gear 3rd or less
        Sounding Speaker No. 2 Speaker Assembly with Box -

  2. FUNCTION OF MAIN COMPONENTS

    The ASC system consists of the following components:

    Component Function
    Stereo component equalizer assembly

    • Receives signals, such as accelerator pedal opening angle, shift lever position, driving mode and drive force, from the ECM via CAN communication and creates simulated engine sounds.

    • Sends a simulated engine sound signal to the No. 1 speaker assembly with box and the No. 2 speaker assembly with box.
    No. 1 speaker assembly with box Outputs simulated engine sounds into the cabin according to the signal sent by the stereo component equalizer assembly.
    No. 2 speaker assembly with box
    Vehicle sound switch Sends an ASC system on/off signal to the stereo component equalizer assembly.
    ECM Sends signals, such as accelerator pedal opening angle, shift lever position, driving mode and drive force to the stereo component equalizer assembly via CAN communication.
    Skid control ECU (Brake actuator assembly) Sends vehicle speed signals to the stereo component equalizer assembly via CAN communication.