AUTOMATIC TRANSAXLE POWERTRAIN DESCRIPTION [JA5A-EL]
BME051700000T18
Outline
• In the powertrain system, the hydraulic pressure transported by the control valve operates the clutch, and brake, and the planetary gear changes the gear ratio according to the driving conditions.
Structure
• The powertrain system consists of seven pairs of clutches, brake, brake band, two pairs of one-way clutches, and simple type planetary gears.
Operation
-
Note
-
• All rotation are viewed from the side cover.
Component description
|
Component
|
Function
|
|
Low clutch
|
• Transmits rotation of low clutch drum to rear internal gear
• Operates in 1GR, 2GR, or 3GR position
|
|
2-4 brake
|
• Prevents rotation of front sun gear
• Operates in 2GR, 4GR, or 5GR position
|
|
High clutch
|
• Transmits rotation of high clutch drum to front planetary carrier
• Operates in 3GR, 4GR, or 5GR position
|
|
Reverse clutch
|
• Transmits rotation of reverse clutch drum to front sun gear
• Operates when vehicle is reversing
|
|
Reduction brake
|
• Prevents rotation of direct clutch drum and prevents rotation of reduction sun gear
|
|
Low and reverse brake
|
• Prevents rotation of low and reverse brake hub
|
|
Direct clutch
|
• Transmits rotation of reduction planetary carrier to reduction sun gear
• Operates in 5GR position
|
|
Low one-way clutch
|
• Locks clockwise rotation of front planetary carrier
|
|
Reduction one-way clutch
|
• Locks counterclockwise rotation of reduction sun gear
|
Gear Position and Operation of Featured Parts
1GR (D range)
2GR (D, S, L range)
2GR (L range HOLD)
3GR (D, S range)
3GR (S range HOLD, L range)
4GR (D, S range)
4GR (D range HOLD, S, L range)
5GR
R position
R position (Reverse inhibition control)
