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 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.
General Motors Corporation
F B F F F B F F F F Y F F F Y F F F Y F Y
F16D B60K F15B F16D F16H B60K F16D F16H F16H F16H Y10T F16D F16D F16D Y10T F16H F16D F16D Y10T F16D Y02T
additional additional inventional inventional additional additional additional inventional inventional additional additional additional additional additional additional inventional additional additional additional additional additional
Michael D. Todd M
Foster Steinmetz