AUTOMATIC TRANSAXLE SYSTEM


  1. CONSTRUCTION


    1. Shift Solenoid Valves SL1, SL2, SL3, SL4, SLU and SLT


      1. In order to provide a hydraulic pressure that is proportional to the current that flows to the solenoid coil, shift solenoid valves SL1, SL2, SL3, SL4, SLU and SLT linearly control the line pressure and clutch and brake engagement pressure based on the signals from the TCM.

      2. Shift solenoid valves SL1, SL2, SL3 and SL4 are high flow linear solenoid valves that can supply more pressure than conventional ones. These shift solenoid valves control engagement elements by directly regulating the line pressure without using a pressure regulation valve (control valve) or a pressure reduction valve (solenoid modulator valve). Thus, the number of valves and the length of the valve body fluid passage have been reduced, the shifting response has been increased and shift shock has been minimized.

        A018GRFE02
        A018GAWE04
        Shift Solenoid Valve Function
        SL1 C1 clutch pressure control
        SL2 C2 clutch pressure control
        SL3 B1 brake pressure control
        SL4 B3 brake pressure control
        SLU

        - Lock-up clutch pressure control

        - B2 brake pressure control
        SLT Line pressure control

    2. Shift Solenoid Valve SL


      1. Shift solenoid valve SL is a 3-way solenoid valve.

      2. A filter is provided at the tip of the solenoid valve to further improve operational reliability.

        A018GG9C02
        *1 Filter - -
        *a Control Pressure *b Modulated Pressure
        *c Drain *d OFF Condition
        *e ON Condition - -
        Shift Solenoid Valve Type Function
        SL 3-way

        • Switches the lock-up relay valve.

        • Switches the B2 apply control valve and the reverse sequence valve.