AUTOMATIC TRANSAXLE SYSTEM


  1. CONSTRUCTION


    1. A 6-speed configuration has been achieved by using 2 planetary gear units, creating a 6-speed automatic transaxle.

    2. A Ravigneaux type planetary gear unit is used as the rear gear unit. The gear unit consists of pairs of sun gears (front and rear) and planetary pinion gears (long and short) with different diameters within a single planetary gear.

    3. A centrifugal fluid pressure canceling mechanism is used in the No. 1 clutch (C1) and No. 2 clutch (C2) that are applied when shifting between 1st to 6th gears.

    4. The shapes of the grooves in the clutches and brake linings have been optimized in order to reduce drag.

      B002F9PC01
      *1 No. 1 Clutch (C1) *2 Intermediate Shaft
      *3 Ravigneaux Planetary Gear Unit *4 Counter Driven Gear
      *5 Differential Ring Gear *6 Differential Drive Pinion
      *7 Input Shaft *8 Underdrive Planetary Gear Unit
      *9 No. 1 Brake (B1) *10 No. 3 Brake (B3)
      *11 Counter Drive Gear *12 No. 2 Brake (B2)
      *13 No. 1 1-way Clutch (F1) *14 No. 2 Clutch (C2)
      B008G4C Transmission Power Flow - -
      B002FCGC01
      *1 Intermediate Shaft *2 Rear Sun Gear (Ravigneaux Planetary Gear Unit)
      *3 Ring Gear (Ravigneaux Planetary Gear Unit) *4 Counter Driven Gear
      *5 Differential Ring Gear *6 Differential Drive Pinion
      *7 Pinion Gear (Underdrive Planetary Gear Unit) *8 Ring Gear (Underdrive Planetary Gear Unit)
      *9 Input Shaft *10 Sun Gear (Underdrive Planetary Gear Unit)
      *11 Front Sun Gear (Ravigneaux Planetary Gear Unit) *12 Counter Drive Gear
      *13 Short Pinion Gear (Ravigneaux Planetary Gear Unit) *14 Long Pinion Gear (Ravigneaux Planetary Gear Unit)
      Component Function
      No. 1 Clutch C1 Connects the intermediate shaft and the Ravigneaux planetary rear sun gear.
      No. 2 Clutch C2 Connects the intermediate shaft and the Ravigneaux planetary ring gear.
      No. 1 Brake B1 Prevents the Ravigneaux planetary front sun gear and the underdrive planetary carrier from turning clockwise or counterclockwise.
      No. 2 Brake B2 Prevents the Ravigneaux planetary ring gear from turning clockwise or counterclockwise.
      No. 3 Brake B3 Prevents the underdrive planetary ring gear from turning clockwise or counterclockwise.
      No. 1 1-way Clutch F1 Prevents the Ravigneaux planetary ring gear from turning counterclockwise.

  2. OPERATION


    1. Transmission Power Flow

      B002FSRE05

      ○: On

      ●: Only operates while AI-shift control is being performed.

      ▲ : Turns on while the B2 brake is being engaged and turns off after the B2 brake is engaged.

      Figure 1. 1st Gear (Shift Lever in M)

      B002FLGC01
      B008G4C Rotation Direction B008G7R Input
      B008G4M Output B002F9B Operates

      Figure 2. 1st Gear (Shift Lever in D)

      B002FH7C01
      B008G4C Rotation Direction B008G7R Input
      B008G4M Output B002F9B Operates

      Figure 3. 2nd Gear

      B002F84C01
      B008G4C Rotation Direction B008G7R Input
      B008G4M Output B002F9B Operates

      Figure 4. 3rd Gear

      B002F9QC01
      B008G4C Rotation Direction B008G7R Input
      B008G4M Output B002F9B Operates

      Figure 5. 4th Gear

      B002F79C01
      B008G4C Rotation Direction B008G7R Input
      B008G4M Output B002F9B Operates

      Figure 6. 5th Gear

      B002FM6C01
      B008G4C Rotation Direction B008G7R Input
      B008G4M Output B002F9B Operates

      Figure 7. 6th Gear

      B002FRNC01
      B008G4C Rotation Direction B008G7R Input
      B008G4M Output B002F9B Operates

      Figure 8. Reverse Gear

      B002FMRC01
      B008G4C Rotation Direction B008G7R Input
      B008G4M Output B002F9B Operates