AUTOMATIC TRANSMISSION SYSTEM


  1. CONSTRUCTION


    1. Solenoid valves (SL1), (SL2), (SL3), (SL4), (SLT) and (SLU)


      1. Solenoid valves have been provided for controlling clutch engagement hydraulic pressure (SL1, SL2), lock-up clutch (SLU), line hydraulic pressure (SLT), and brake engagement hydraulic pressure (SL3, SL4).

      2. By directly controlling the hydraulic pressure for each clutch and brake with high flow rate solenoid valves (SL1), (SL2), (SL3), (SL4), shift-change responsiveness has been improved, shift shocks have been reduced, and the structure has been simplified through the reductions of oil passage lengths and the numbers of components.

        Figure 1. Solenoid Valves (SL1), (SL2), (SL3) and (SL4)

        B002MS5E01
        *1 Spool Valve
        *2 Hydraulic Pressure
        *3 Sleeve
        *4 Current

        Figure 2. Solenoid Valve (SLT)

        B002MV3E01
        *1 Spool Valve
        *2 Hydraulic Pressure
        *3 Sleeve
        *4 Current

        Figure 3. Solenoid Valve (SLU)

        B002NH1E01
        *1 Spool Valve
        *2 Hydraulic Pressure
        *3 Sleeve
        *4 Current
        Function of Solenoid Valves
        Solenoid Valve Function
        Solenoid Valve (SL1) Performs shift controls.
        Solenoid Valve (SL2) Performs shift controls.
        Solenoid Valve (SL3) Performs shift controls.
        Solenoid Valve (SL4) Performs shift controls.
        Solenoid Valve (SLT) Performs line pressure controls.
        Solenoid Valve (SLU)

        • Performs lock-up clutch controls.

        • Performs B2 brake hydraulic pressure controls (only for the 1st range when the shift lever is in S).

    2. Solenoid Valve (SL)


      1. A transmission 3-way solenoid (SL) has been provided for switching lock-up hydraulic pressure and B2 brake hydraulic pressure.

        B002N72E01
        *1 Control Pressure
        *2 Line Pressure
        *3 Strainer
        *4 Drain
        Function of Solenoid Valve
        Solenoid Valve Function
        Solenoid Valve (SL) Shifts between lock-up hydraulic pressure and B2 brake hydraulic pressure.