192 clutches and power-stop control – Vortex-flow drive and clutch – With brake
Patent
1975-06-30
1976-11-09
Wyche, Benjamin W.
192 clutches and power-stop control
Vortex-flow drive and clutch
With brake
192109F, 192 8719, 13762569, F16D 6704, B60K 4126
Patent
active
039905497
ABSTRACT:
In a control system for a vehicle having a transmission with fluid actuated frictional engaging means and brake means wherein a first hydraulic passage means interconnects a fluid pressure source with the frictional engaging means, a regulating valve is disposed in the first hydraulic passage means, for regulating the pressure of the pressure fluid supplied to the frictional engaging means, with the regulating valve means also being operatively connected with the brake means and responsive to the degree of actuation of the brake means and actuatable between a first and a second position, whereby in the first position the pressure fluid can freely flow into, through and out of the inching valve toward the frictional engaging means, however in the second position, the fluid flow through a first set of radial apertures is blocked by a regulating spool and thereafter further radial apertures are progressively opened by the regulating spool means so as to regulate the force of the pressure fluid acting on the frictional engaging means. One embodiment of this invention is a downstream regulator that regulates the flow of pressure fluid into the regulator valve whereas another embodiment of this invention is a bypass type downstream regulator valve that regulates the flow of pressure fluid out of the regulator valve. Both of these embodiments feature a quick initial pressure drop over a short distance of valve travel, followed by a low further pressure drop over a long distance of valve travel, thus permitting insensitive control by the vehicle operator and thereby permitting smooth vehicle performance.
REFERENCES:
patent: 2814371 (1957-11-01), Bolster et al.
patent: 2861480 (1958-11-01), Curtis
patent: 2972906 (1961-02-01), Schroeder
patent: 3155208 (1964-11-01), Biabaud
patent: 3243025 (1966-03-01), Staab et al.
patent: 3339672 (1967-09-01), Crandall
patent: 3850273 (1974-11-01), Murakami
Dreves Philip J.
Sisson Ronald L.
Clark Equipment Company
Ruf Ernst H.
Wyche Benjamin W.
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