AUTOMATIC TRANSMISSION SYSTEM


  1. CONSTRUCTION


    1. The solenoid valve (S1) and solenoid valve (SR) are 3-way solenoid valves.

    2. The solenoid valve (S2) uses a 2-way solenoid valve.

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

      Figure 1. Solenoid Valve (S1)

      B002NPAC01
      *1 Filter - -
      *a Off Condition *b On Condition
      B002NKU Line Pressure B002N8P Control Pressure
      B002N2T Drain - -

      Figure 2. Solenoid Valve (S2)

      B002NHRC01
      *1 Filter - -
      *a Off Condition *b On Condition
      B002NKU Line Pressure B002N8P Control Pressure

      Figure 3. Solenoid Valve (SR)

      B002MY3C01
      *1 Filter - -
      *a Off Condition *b On Condition
      B002NKU Line Pressure B002N8P Control Pressure
      B002N2T Drain - -

    4. In order to provide a hydraulic pressure that is proportional to the current that flows to the solenoid coil, the solenoid valves (SL1) and (SL2) linearly control the clutch pressure based on the signals they receive from the TCM.

      Figure 4. Solenoid Valve (SL1) or (SL2)

      B002NB9E01
      *1 Spool Valve
      *2 Hydraulic Pressure
      *3 Sleeve
      *4 Current

    5. In order to provide a hydraulic pressure that is proportional to the current that flows to the solenoid coil, the solenoid valve (SLT) linearly controls the line pressure based on the signals it receives from the TCM.

      Figure 5. Solenoid Valve (SLT)

      B002NIYE01
      *1 Hydraulic Pressure
      *2 Spool Valve
      *3 Sleeve
      *4 Current

    6. In order to provide a hydraulic pressure that is proportional to the current that flows to the solenoid coil, the solenoid valve (SLU) linearly controls the lock-up clutch engagement pressure based on the signals it receives from the TCM.

      Figure 6. Solenoid Valve (SLU)

      B002NLKE01
      *1 Hydraulic Pressure
      *2 Spool Valve
      *3 Sleeve
      *4 Current
      Function of Shift Solenoid Valves
      Solenoid Valve Function
      Solenoid Valve (S1) Switches the 2-3 shift valve.
      Solenoid Valve (S2) Switches the 1-2 shift valve and the 3-4 shift valve.
      Solenoid Valve (SR) Switches the clutch apply control valve.
      Solenoid Valve (SL1)

      • No. 1 clutch (C1) pressure control

      • Accumulator back pressure control
      Solenoid Valve (SL2) No. 1, No. 2 and No. 4 brakes (B1, B2, B4) pressure control
      Solenoid Valve (SLT)

      • Line pressure control

      • Accumulator back pressure control
      Solenoid Valve (SLU)

      • Lock-up clutch pressure control

      • Accumulator back pressure control