Timing valve for manually selected gears of an automatic transmission
Patent
·
OSTI ID:6884836
This patent describes an automatic transmission producing multiple gear ratios and having first and second friction elements, a hydraulic system for controlling operation of the friction elements to produce gear shifts initiated manually by an operator. It comprises: a source of regulated line fluid pressure; manual valve means movable by an operator among positions corresponding to manually selected gears of the transmission for connecting the regulated line pressure source to a first port whenever the gears are selected manually; timing valve means connected to the first port. This delays communication between the first port and an outlet port until expiration of a period that begins when the line pressure source is connected to the first port; first control valve means for producing first and second fluid pressure states; and first shift valve means for connecting the outlet port alternately to a first friction element and a second friction element in accordance with the pressure states of the first control valve means.
- Assignee:
- Ford Motor Co., Dearborn, MI (USA)
- Patent Number(s):
- A; US 4932282
- Application Number:
- PPN: US 7-215161A
- OSTI ID:
- 6884836
- Country of Publication:
- United States
- Language:
- English
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