192 clutches and power-stop control – Clutches – Progressive engagement
Patent
1983-01-31
1985-03-26
Bonck, Rodney H.
192 clutches and power-stop control
Clutches
Progressive engagement
192 84R, 192 85R, 192109F, 180247, 13762564, F16D 25063, F16D 2900, B60K 4100
Patent
active
045067732
ABSTRACT:
A rear wheel drive vehicle is converted to a four-wheel drive vehicle by operation of a hydraulically operated clutch which is controlled by a hydraulic valve. The hydraulic valve is spring biased to a clutch disengaged position and is hydraulically actuated to its clutch engaged position through operation of a pilot valve circuit which includes an electrically operated solenoid valve. The pilot valve circuit includes a flow restrictor providing modulated flow thereby affording a controlled pressure rise in the clutch whereby a smooth engagement of the front wheel drive is achieved.
REFERENCES:
patent: 3552516 (1971-01-01), Beard et al.
patent: 3674121 (1972-07-01), Copeland
patent: 3680652 (1972-08-01), Greene
patent: 3833100 (1974-09-01), Aschauer
patent: 3841423 (1974-10-01), Holtkamp et al.
patent: 3988951 (1976-11-01), Mair et al.
patent: 4099588 (1978-07-01), Dezelan
patent: 4138004 (1979-02-01), Horsch
patent: 4233857 (1980-11-01), Quick
patent: 4369671 (1983-01-01), Matsumoto et al.
patent: 4401182 (1983-08-01), Pollman
Allis-Chalmers Corporation
Bonck Rodney H.
House David D.
Nelson Arthur L.
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