Modulatable power transmission clutch

Details Modulatable power transmission clutch Modulatable power transmission clutch

1977-11-14

1980-02-05

Wyche, Benjamin

192 clutches and power-stop control

Elements

Thrust members, retarders, and stops

192 85AA, F16D 2500

Patent

active

041868293

ABSTRACT:
A modulatable power transmission clutch has a rotatable driving member, a rotatable driven member, and slippingly engagable clutch plates between said members which are movable into engagement by a fluid-applied spring-released movable piston having two separate fluid application areas thereon, with one area being larger than the other. Fluid is supplied directly to the smaller piston area by an operator-controlled proportional solenoid valve to regulate clutch modulation. Fluid flow to the larger piston area is controlled by a spring-biased trigger valve which pops open when fluid pressure to the smaller piston area reaches a predetermined level, to thereby effect maximum clutch engagement. The trigger valve operates a dump valve which opens to relieve fluid pressure on the larger piston area when the trigger valve recloses in response to reduction of fluid pressure from the solenoid valve.

REFERENCES:
patent: 2916122 (1959-12-01), Hindmarch
patent: 2979176 (1961-04-01), Voth
patent: 3106999 (1963-10-01), Snoy
patent: 3265175 (1966-08-01), Crosswhite
patent: 3472350 (1969-10-01), Overson
patent: 4070926 (1978-01-01), Schneider et al.

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