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Automatic Transaxle System: Description

Structure & Technical highlights

Fig 1: Identifying Automatic Transaxle System
Courtesy of KIA MOTORS AMERICA, INC.
Variable Line Pressure Control
1. Description
  - Form the most suitable line pressure according to the vehicle driving condition
2. Special Features
  - VFS (Variable Force Solenoid) valve (For varying line pressure)
  - Reducing valve added(Stabilize control pressure in shiftings)
3. Effects
  - Improved power transmission efficiency and fuel consumption

Fig 2: Variable Line Pressure Control System Chart

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Courtesy of KIA MOTORS AMERICA, INC.

Gear durability improvement and less-noisy gear development
1. Description
  - Optimal gear transmission ratio design from analyzing gears
2. Special Features
  - Apply High strength gear material
  - Gear teeth width increased
  - Planetary gear (3 pinions → 4 pinions)
  - Less noisy gear development
3. Effects
  - Durability improvement
  - Reduction of noise level
Case/Housing intensity reinforced
1. Description
  - Case/Housing intensity reinforced
2. Special Features
  - Converter housing intensity reinforced(Ribs added and thickness increased)
  - Most suitable stiff reinforcement through analyzing
3. Effects
  - Intensity increased and banding vibration decreased
  - NVH Performance improvement
New frictional material
- Description
  - Apply new frictional material for capacity and durability improvement
- Special Features
  - SSP (Single Sided Plate) applied only on overdrive clutch and 2nd brake
  - Apply the next generation frictional material (BWA 6100/D 0880-88)
- Effects
  - Thermal absorption capacity improvement
  - Energy capacity and durability improvement