Lockup clutch control system

Details Lockup clutch control system Lockup clutch control system

F - Mech Eng,Light,Heat,Weapons

16

H

341/68

F16H 45/02 (2006.01) F16H 47/06 (2006.01) F16H 61/14 (2006.01)

Patent

CA 1181835

LOCKUP CLUTCH CONTROL SYSTEM Abstract: An electronic control system (30) for a lockup clutch includes a control system for receiving a vehicle speed signal (41) and, as a function of adjustable engagement and release threshold signals, controlling a solenoid valve (32) to engage and release a lockup clutch (22). The point of lockup is set by a potentiometer (76) to represent a first vehicle speed, and the point of release is set by a variable resistor (77) at a second speed, lower than the first. The variable resistor (77) is switched into the circuit only after the first threshold level is passed and the clutch is locked up. A signal from the brake pedal (29) overrides the threshold established in the control system to provide clutch disengagement as soon as the brake pedal is depressed. Various circuit components protect the control system from inadvertent damage by the driver and/or vehicle maintenance personnel.

398815

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