AUTOMATIC TRANSMISSION SYSTEM


  1. CONSTRUCTION


    1. Shift Solenoid Valves SL1, SL2, SL3, SL4, SL5, SLU (Lock Up Control Solenoid Assembly) and SLT (Line Pressure Control Solenoid Assembly)


      • 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, SL5, SLU and SLT linearly control the line pressure and clutch and brake engagement pressure based on the signals from the TCM*1 or ECM*2.

      • Shift solenoid valves SL1, SL2, SL3, SL4 and SL5 are large 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 the pressure regulation valve or the pressure reduction valve. Thus, the number of valves and the length of the valve body fluid passage have been reduced, the shifting response has been improved and the shift shock has been minimized.

        Tech Tips

        *1: Models with 2GR-FSE Engine

        *2: Models with 8AR-FTS Engine


      1. Models with 2GR-FSE Engine

        Figure 1. Shift Solenoid Valve SL1, SL3, SL4 and SL5

        B0072BOE01
        *1 Spool Valve
        *2 Hydraulic Pressure
        *3 Current
        *4 Sleeve

        Figure 2. Shift Solenoid Valve SL2

        B00729LE01
        *1 Spool Valve
        *2 Hydraulic Pressure
        *3 Sleeve
        *4 Current

        Figure 3. Shift Solenoid Valve SLU (Lock Up Control Solenoid Assembly)

        B00728KE01
        *1 Spool Valve
        *2 Hydraulic Pressure
        *3 Sleeve
        *4 Current

        Figure 4. Shift Solenoid Valve SLT (Line Pressure Control Solenoid Assembly)

        B00721SE01
        *1 Spool Valve
        *2 Hydraulic Pressure
        *3 Sleeve
        *4 Current
      2. Models with 8AR-FTS Engine

        Figure 5. Shift Solenoid Valve SL1, SL2, SL3, SL4 and SL5

        B0072I6E04
        *1 Spool Valve
        *2 Hydraulic Pressure
        *3 Sleeve
        *4 Current

        Figure 6. Shift Solenoid Valve SLU (Lock Up Control Solenoid Assembly)

        B00729IE03
        *1 Spool Valve
        *2 Hydraulic Pressure
        *3 Sleeve
        *4 Current

        Figure 7. Shift Solenoid Valve SLT (Line Pressure Control Solenoid Assembly)

        B00728ME04
        *1 Spool Valve
        *2 Hydraulic Pressure
        *3 Sleeve
        *4 Current
    2. Shift Solenoid Valves SL and SR (Models with 2GR-FSE Engine)


      • A 3-way solenoid valve is used for shift solenoid valves SL (Transmission 3-way Lock Up Solenoid Assembly) and SR (Transmission 3-way Lock Up Solenoid Assembly).

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

      Figure 8. Shift Solenoid Valve SL (Transmission 3-way Lock Up Solenoid Assembly)

      B00720IE01

      Figure 9. Shift Solenoid Valve SR (Transmission 3-way Lock Up Solenoid Assembly)

      B007216E01
    3. Shift Solenoid Valves SC2 and SC1 (Models with 8AR-FTS Engine)


      1. A 3-way solenoid valve is used for shift solenoid valves SC2 and SC1.

      2. A filter is provided at the tip of the shift solenoid valves to further improve operational reliability.

        Figure 10. Shift Solenoid Valve SC2 and SC1

        B007272E03