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
• 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.

Fig 1: Cut-Away View Of Torque Converter

Courtesy of FORD MOTOR CO.