Control system for transmission engagement

Details Control system for transmission engagement Control system for transmission engagement

1985-09-24

1987-03-17

Bonck, Rodney H.

192 clutches and power-stop control

Transmission control and clutch control

Common control

74850, B60K 4122

Patent

active

046500480

ABSTRACT:
A control system for preventing engagement of a transmisson when its power source is started with the transmission in gear. The system uses a control valve, an engagement override valve, a check valve and a relief valve to interrupt fluid flow to clutch or brake elements during initial startup unless the transmission is in neutral or park. Unwanted triggering of the override system upon a reduction of hydraulic pressure is avoided in this control system. The control valve of this system may be made responsive to clutch pedal or shift lever movement.

REFERENCES:
patent: 3468194 (1969-09-01), Horsh et al.
patent: 3574288 (1971-04-01), Barth et al.
patent: 3709065 (1973-01-01), Starling
patent: 3863523 (1975-02-01), Starling et al.
patent: 4345490 (1982-08-01), Madson
patent: 4396099 (1983-08-01), Shirley

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