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, SLT and SLU linearly control the line pressure and clutch and brake engagement pressure based on the signals from the ECM.

    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.

      Figure 1. Shift Solenoid Valve SL1/SL3

      A01R8KXE02

      Figure 2. Shift Solenoid Valve SL2/SL4

      A01R7Z1E02

      Figure 3. Shift Solenoid Valve SLT (Line Pressure Control Solenoid Assembly)

      A01R84UE02

      Figure 4. Shift Solenoid Valve SLU (Lock-up Control Solenoid Assembly)

      A01R869E02

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

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

      Figure 5. Shift Solenoid Valve SL

      A01R8EKC01
      *1 Strainer - -
      *a Off *b On
      B007WJ2 Drain B007WKJ Control Pressure
      A01R8GP Modulated Pressure A01R83C 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 Solenoid Assembly) Line pressure control
      Shift Solenoid Valve SLU (Lock-up Control Solenoid Assembly)

      • 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.