Aisin AW21 - Torque Converter

Torque Converter

The torque converter transmits and multiplies torque by means of transmission fluid inside the torque converter. The torque converter is composed of the following:

- Converter case
- Pump impeller assembly
- Turbine assembly
- Stator assembly/One-Way Clutch (OWC)
- Lock-up clutch

In addition, the use of the lock-up clutch is intended to improve fuel economy as a direct coupling between the engine and the transaxle.

The standard torque converter components operate as follows:

- Rotation of the converter housing and impeller sets the transmission fluid in motion.
- The turbine reacts to the transmission fluid motion from the impeller, transferring rotation to the geartrain through the input shaft.
- The reactor redirects transmission fluid going back into the impeller, providing for torque multiplication.
- The clutch and damper assembly dampens powertrain torsional vibration and provides a direct mechanical connection for improved efficiency.
- Power is transmitted from the torque converter to the planetary gearsets and other components through the input shaft.