AUTOMATIC TRANSAXLE SYSTEM


  1. CONSTRUCTION


    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 ECM.

    2. The 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.

      Figure 1. Shift Solenoid Valve SL1/SL3

      B0082PCE02

      Figure 2. Shift Solenoid Valve SL2/SL4

      B008303E02

      Figure 3. Shift Solenoid Valve SLT

      B00831RE02

      Figure 4. Shift Solenoid Valve SLU

      B0082RBE02

    3. The shift solenoid valve SL is a 3-way solenoid valve.

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

      B0082Z2C04
      *1 Strainer - -
      *a Off Condition *b On Condition
      B0082XT Drain B0082R6 Control Pressure
      B00832W Modulated Pressure B008300 Solenoid Movement
      Function of Shift Solenoid Valves
      Shift Solenoid Valve Function
      Shift Solenoid Valve SL1 No. 1 clutch (C1) pressure control
      Shift Solenoid Valve SL2 No. 2 clutch (C2) pressure control
      Shift Solenoid Valve SL3 No. 1 brake (B1) pressure control
      Shift Solenoid Valve SL4 No. 3 brake (B3) pressure control
      Shift Solenoid Valve SLT Line pressure control
      Shift Solenoid Valve SLU

      • Lock-up clutch pressure control

      • No. 2 brake (B2) pressure control
      Shift Solenoid Valve SL

      • Switches the lock-up relay valve.

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