Lockup clutch control system

Details Lockup clutch control system Lockup clutch control system

1981-04-24

1984-10-23

Krizmanich, George H.

192 clutches and power-stop control

Vortex-flow drive and clutch

With brake

192 0094, 192 331, B60K 4128

Patent

active

044783221

ABSTRACT:
An electronic control system for a lockup clutch includes a control system for receiving a vehicle speed signal and, as a function of adjustable engagement and release threshold signals, controlling a solenoid valve to engage and release a lockup clutch. The point of lockup is set by a potentiometer to represent a first vehicle speed, and the point of release is set by a variable resistor at a second speed, lower than the first. The variable resistor 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 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.

REFERENCES:
patent: 3232399 (1966-02-01), Harned et al.
patent: 3446320 (1969-05-01), Schott
patent: 3566998 (1971-03-01), Honda
patent: 3599764 (1971-08-01), Darmstadt et al.
patent: 4056177 (1977-11-01), Ahlen et al.
patent: 4223829 (1980-09-01), Bange
patent: 4257503 (1981-03-01), Lutnick
patent: 4282947 (1981-08-01), Kemper
patent: 4388987 (1983-06-01), Hennessey et al.

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