Hydraulic control device for automatic transmission for vehicle

Details Hydraulic control device for automatic transmission for vehicle Hydraulic control device for automatic transmission for vehicle

1989-08-02

1991-01-29

Diehl, Dwight

Machine element or mechanism

Rotary member or shaft indexing, e.g., tool or work turret

Preselected indexed position

74878, B60K 4106

Patent

active

049877984

ABSTRACT:
A hydraulic control device having a reverse inhibition system and applicable to an automatic transmission for a vehicle of a type including a friction engaging means for a reverse stage having a reverse exclusive hydraulic pressure chamber adapted to be supplied with a hydraulic pressure only for setting up the reverse stage, the reverse inhibition system having a reverse inhibition valve biased to a reverse inhibition position by a control hydraulic pressure for interrupting supply of hydraulic pressure to the reverse exclusive hydraulic pressure chamber and to a reverse allowance position by a hold hydraulic pressure for allowing the supply of hydraulic pressure to the reverse exclusive hydraulic pressure chamber, wherein the hydraulic pressure supplied to the reverse exclusive hydraulic pressure chamber is used for the hold hydraulic pressure.

REFERENCES:
patent: 3937107 (1976-02-01), Lentz
patent: 4027554 (1977-06-01), Ito et al.
patent: 4033203 (1977-07-01), Hirosawa et al.
patent: 4134313 (1979-01-01), Ishikawa
patent: 4136584 (1979-01-01), Ishikawa
patent: 4412461 (1983-11-01), Windsor
patent: 4744269 (1988-05-01), Greene et al.
patent: 4817473 (1989-04-01), Baltusis et al.
patent: 4841816 (1989-06-01), Bullock

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