Control apparatus, method and diagnostic for hydraulic fill and drain

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...

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Main Authors Foster, Michael D, Steinmetz, Todd M
Format Patent
LanguageEnglish
Published 28.06.2005
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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.
AbstractList 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.
Author Steinmetz, Todd M
Foster, Michael D
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References Hoge (2878832) 19590300
McCabe (4966195) 19901000
Hoge (2909193) 19591000
Hoge (2970611) 19610200
Schmidt (5931757) 19990800
Jordan (3135289) 19640600
Ruchser (3139109) 19640600
Warnock (3283862) 19661100
Hoge (3018794) 19620100
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Snippet 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...
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Title Control apparatus, method and diagnostic for hydraulic fill and drain
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