AUTOMATIC TRANSMISSION SYSTEM


  1. CONSTRUCTION


    • The gear train is composed of 2 sets of multi-plate type brakes, 4 sets of multi-plate type clutches and 3 sets of planetary gear units.

    • The tooth number, position and contact area of the gears are optimized to reduce the amount of gear noise.

    • Optimally-designed groove shapes are used in the friction material of the clutch and brake portions to reduce losses due to drag. As a result, this helps improve fuel economy performance.

      A004DQ2C01
      *1 No. 1 Brake (B1) *2 Front Planetary Gear Unit
      *3 No. 3 Clutch (C3) *4 Middle Planetary Gear Unit
      *5 Rear Planetary Gear Unit *6 No. 4 Clutch (C4)
      *7 No. 2 Brake (B2) *8 No. 1 Clutch (C1)
      *9 No. 2 Clutch (C2) - -
      A004DXGC01
      *1 Front Planetary Long Pinion Gear *2 Input Shaft
      *3 Front Planetary Large Sun Gear *4 Front Planetary Gear Unit
      *5 Front Planetary Ring Gear *6 Front Planetary Short Pinion Gear
      *7 Front Planetary Small Sun Gear *8 Middle Planetary Ring Gear
      *9 Middle Planetary Gear Unit *10 Rear Planetary Ring Gear
      *11 Rear Planetary Gear Unit *12 Output Shaft
      *13 Middle/Rear Planetary Sun Gear *14 Rear Planetary Pinion Gear
      *15 Middle Planetary Pinion Gear - -
      C1 No. 1 Clutch C2 No. 2 Clutch
      C3 No. 3 Clutch C4 No. 4 Clutch
      B1 No. 1 Brake B2 No. 2 Brake
    Component Operation
    No. 1 Clutch (C1)

    • Connects the front planetary ring gear and middle/rear planetary sun gear.

    • Connects the middle/rear planetary sun gear and middle planetary ring gear when the No. 3 clutch is in operation.
    No. 2 Clutch (C2)

    • Connects the front planetary small sun gear and rear planetary sun gear.

    • Connects the front planetary small sun gear and front planetary ring gear when the No. 1 clutch is in operation.
    No. 3 Clutch (C3)

    • Connects the front planetary ring gear and middle planetary ring gear.

    • Connects the middle/rear planetary sun gear and middle planetary ring gear when the No. 1 clutch is in operation.
    No. 4 Clutch (C4) Connects the middle planetary carrier and rear planetary ring gear.
    No. 1 Brake (B1) Locks the rotation of the front planetary large sun gear.
    No. 2 Brake (B2)

    • Locks the rotation of the middle planetary ring gear.

    • Locks the rotation of the front planetary ring gear when the No. 3 clutch is in operation.

  2. OPERATION


    1. Transmission Power Flow

      Figure 1. Operating Condition of Shift Solenoid Valves

      A004D9YE01

      ○: On

      X: Off

      ▲: Control

      ●: When lockup is operating, SL is off and SLU is on. When lockup is not operating, SL is on and SLU is off.

      Figure 2. Operating Condition of Clutches and Brakes

      A004DLIE01

      ○: Operates

      X: Does not Operate

      ▲: Control

      Figure 3. 1st

      A004DNM
      A004DTZ Input A004E2A Operation

      Figure 4. 2nd

      A004DLM
      A004DTZ Input A004E2A Operation

      Figure 5. 3rd

      A004E1B
      A004DTZ Input A004E2A Operation

      Figure 6. 4th

      A004DHN
      A004DTZ Input A004E2A Operation

      Figure 7. 5th

      A004DCI
      A004DTZ Input A004E2A Operation

      Figure 8. 6th

      A004E0W
      A004DTZ Input A004E2A Operation

      Figure 9. 7th

      A004DAA
      A004DTZ Input A004E2A Operation

      Figure 10. 8th

      A004E05
      A004DTZ Input A004E2A Operation

      Figure 11. 9th

      A004DOS
      A004DTZ Input A004E2A Operation

      Figure 12. 10th

      A004DQJ
      A004DTZ Input A004E2A Operation

      Figure 13. Reverse

      A004DNO
      A004DTZ Input A004E2A Operation