Control apparatus, method and diagnostic for hydraulic fill...

Details Control apparatus, method and diagnostic for hydraulic fill... Control apparatus, method and diagnostic for hydraulic fill...

2005-06-28

2005-06-28

Michalsky, Gerald A. (Department: 3753)

Fluid handling

Processes

With control of flow by a condition or characteristic of a...

C091S448000, C137S596160

Reexamination Certificate

active

06910493

ABSTRACT:
Hydraulic fill and drain of a clutch chamber is controlled with a blocking valve and a trim valve. The blocking valve selectively provides pressurized fluid to the trim valve which in turn selectively provides the pressurized fluid to the clutch chamber. Exhausting of the clutch chamber is effected through one of two alternate paths utilizing deactivation of one of the trim and blocking valves. Back up exhausting of the clutch chamber is effected through the other of the alternative paths. Such system allows for determination of valve failures and continued operation until such failures can be rectified.

REFERENCES:
patent: 2878832 (1959-03-01), Hoge
patent: 2909193 (1959-10-01), Hoge
patent: 2970611 (1961-02-01), Hoge
patent: 3018794 (1962-01-01), Hoge
patent: 3135289 (1964-06-01), Jordan
patent: 3139109 (1964-06-01), Ruchser
patent: 3283862 (1966-11-01), Warnock
patent: 4966195 (1990-10-01), McCabe
patent: 5931757 (1999-08-01), Schmidt

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