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 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.

      A00YY3ZE02
      A00YY7PE01
      A00YY10E01
      A00YYL6E01

    3. 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.

      A00YYMCC01
      *1 Filter - -
      *a Off Condition *b On Condition
      A00YYR0 Drain A00YYDY Control Pressure
      A00YYOW Modulated Pressure - -
      Function of Shift Solenoid Valves
      Shift Solenoid Valve Function
      SL1 No. 1 clutch (C1) pressure control
      SL2 No. 2 clutch (C2) pressure control
      SL3 No. 1 brake (B1) pressure control
      SL4 No. 3 brake (B3) pressure control
      SLU

      • Lock-up clutch pressure control

      • No. 2 brake (B2) pressure control
      SLT Line pressure control
      SL

      • Switches the lock-up relay valve.

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