940 L4-2.3L SOHC VIN 88 B230F (1992)
Torque Converter: Description and Operation
Torque Converter With Lock-Up
Lock-up System
The torque convener is described under "Torque Convener General". This section will deal only with the mechanical lock-up function.
Power transmission is fully mechanical when the torque converter is locked by the lock-up clutch, thereby eliminating the slip which is an
inevitable feature of the unit. Engine speed is reduced and a certain fuel saving is achieved.
The mechanism consists of a plate which is pressed into contact with the torque convener housing, the mating surface of which is provided with a
friction lining.
Engagement and disengagement are controlled by the signal valve and changeover valve in the control system. (In the illustration below, the
control system is shown with the underside facing upward.)
Lock-up Function Disengaged
