Device for selective actuation of electric solenoid in a torque

Details Device for selective actuation of electric solenoid in a torque Device for selective actuation of electric solenoid in a torque

1994-08-19

1996-04-09

Marmor, Charles A.

192 clutches and power-stop control

Vortex-flow drive and clutch

Including drive-lockup clutch

192 33, 477 65, F16D 3316

Patent

active

055052843

ABSTRACT:
An aftermarket device for permitting an electric solenoid of a torque converter lock-up clutch to be selectively actuated and deactuated by a vehicle electronic control module only when the vehicle is operating above a predetermined vehicle speed, or is operating in the high gear ratio. The device includes a switching transistor in the supply voltage side of an electric solenoid which enables the solenoid by coupling a source voltage to the solenoid from a brake switch. The switching transistor can either be an "NPN" or an "PNP" type depending upon whether a pressure activated contact switch in the transmission is "normally open" or "normally closed".

REFERENCES:
patent: 4416358 (1983-11-01), Kapp
patent: 4478322 (1984-10-01), Carlson et al.
patent: 4665770 (1987-05-01), Van Selous
patent: 4676353 (1987-06-01), Matsuda
patent: 4691812 (1987-09-01), Takizawa
patent: 4730709 (1988-03-01), Kawata et al.

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