Torque converter

Torque converter

The mechanical power flow in the transmission starts at the connection point between the torque converter and flywheel. When the engine is running, the converter housing (pump) turns with the engine speed. With rotation, the converter multiplies the engine torque and transfers it to the drive shaft. The drive shaft forms the main connection for mechanical operation of the transmission.

Brief description of components

To suit engine with higher torque, the automatic transmissions have different levels of power. The automatic transmission differ, e.g., in that they have different torque converters.
Depending on the engine version, the following sizes of torque converter are used:

The torque converter is equipped with a turbine wheel damper. The turbine wheel damper improves the values for noise, vibrations and roughness when the converter lockup clutch is actuated in the lower engine speed range.

System functions

Slip on the converter lockup clutch

The converter lockup clutch leads to an improvement in the fuel consumption. Depending on the vehicle, engine and transmission parameters, the following operating modes are available:

Notes for Service department

Diagnosis instructions

Relevant faults in the converter lockup clutch

The following faults are treated in the test module:

 

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