AUTOMATIC TRANSMISSION SYSTEM


  1. CONSTRUCTION


    1. Shift Solenoid Valves S1, S2, S3, S4 and SR


      • The shift solenoid valves S1, S2, S3, S4 and SR are 3-way solenoid valves.


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

      Figure 1. Shift Solenoid Valves S1, S2, S3 and SR

      A01MQWEC01
      *1 Filter - -
      B003SJ8 Drain B003SJM Line Pressure
      A01MR0E Control Pressure - -

      Figure 2. Shift Solenoid Valves S4

      A01MQPUC01
      *1 Filter - -
      B003SJ8 Drain B003SJM Line Pressure
      A01MR0E Control Pressure - -
      Function of Shift Solenoid Valves S1, S2, S3, S4 and SR
      Shift Solenoid Valve Function
      S1 Switches the 1-2 shift valve and the SL1 relay valve.
      S2 Switches the 2-3 shift valve and the 5-6 shift valve.
      S3 Switches the 3-4 shift valve.
      S4 Switches the 4-5 shift valve, SL1 relay valve and reverse sequence valve.
      SR Switches the clutch apply relay valve and B1 apply relay valve.

    2. Shift Solenoid Valves SL1, SL2, SLT (Line Pressure Control Solenoid Assembly) and SLU (Lock up Control Solenoid Assembly)


      • In order to provide a hydraulic pressure that is proportional to the current that flows to the solenoid coil, the shift solenoid valves SL1 and SL2 linearly control the clutch pressure based on the signals it receives from the ECM.

      Figure 3. Shift Solenoid Valves SL1 and SL2

      A01MQR8E02
      *1 Sleeve
      *2 Hydraulic Pressure
      *3 Spool Valve
      *4 Current

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

      Figure 4. Shift Solenoid Valves SLU

      A01MR4YE02
      *1 Spool Valve
      *2 Hydraulic Pressure
      *3 Sleeve
      *4 Current

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

      Figure 5. Shift Solenoid Valves SLT

      A01MQS1E02
      *1 Spool Valve
      *2 Hydraulic Pressure
      *3 Sleeve
      *4 Current
      Function of Shift Solenoid Valves SL1, SL2, SLT (Line Pressure Control Solenoid Assembly) and SLU (Lock up Control Solenoid Assembly)
      Shift Solenoid Valve Function
      SL1

      • C1 clutch pressure control

      • Accumulator back pressure control
      SL2 B1, B2 and B4 brake pressure control
      SLT

      • Line pressure control

      • Accumulator back pressure control
      SLU

      • Lock-up clutch pressure control

      • Accumulator back pressure control