192 clutches and power-stop control – Transmission control and clutch control – Common control
Patent
1982-08-06
1985-05-07
Krizmanich, George H.
192 clutches and power-stop control
Transmission control and clutch control
Common control
192 361, B60K 4122
Patent
active
045152551
ABSTRACT:
A fluid control system for a continuously variable transmission utilizing a first valve which is manually operable, and a second valve operable by a fluid motor which fluid motor also provides engagement and disengagement of two gear ratios. The first valve directs fluid flow from a fluid source to the fluid motor and to the second valve for communication to a fluid actuated starting clutch. Fluid for the clutch and fluid motor are only provided when the first valve is selectively engaged to the first or second operable gear ratios thereby directing fluid from the fluid source to the fluid actuated motor. The fluid motor is operable to move a gear engaging means and simultaneously move the second valve to an aligned port position permitting fluid flow to the starting clutch. The clutch is only engaged when the manually operated valve is in the first or second gear ratio position, therefore, independent park and neutral positions have been obviated by the fact that such a starting clutch is no longer providing power to an output means. In an alternative embodiment a pressure modulator valve is interposed between the fluid source and the first valve to control the line pressure to the fluid control system. The use of the starting clutch in this fashion obviates the use of a forward clutch to provide driving communication between input and output means.
REFERENCES:
patent: 2932371 (1960-04-01), Backus et al.
patent: 3083801 (1963-04-01), Frohner
patent: 3344896 (1967-10-01), Rasmussen
patent: 3365035 (1968-01-01), Kress
patent: 3508450 (1970-04-01), Richards
patent: 3557918 (1971-01-01), Yoshida et al.
patent: 3664470 (1972-05-01), Beech et al.
patent: 3946842 (1976-03-01), Siebers et al.
Haley William J.
Neumann Guenter J.
Borg-Warner Corporation
Gregorczyk Florian S.
Krizmanich George H.
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