Control apparatus for a transmission and the like

Details Control apparatus for a transmission and the like Control apparatus for a transmission and the like

1992-12-09

1995-01-03

Bonck, Rodney H.

192 clutches and power-stop control

Clutches

Operators

74335, F16D 2511

Patent

active

053778014

ABSTRACT:
A control apparatus for selectively operating any one of at least three fluid pressure operated devices at any given time. The control system includes first and second valves arranged in combination with each other and which are hydraulically interposed between a fluid pressure source and each of the fluid operated devices. Each valve is shiftable between first and second positions. Hydraulic logic circuitry selectively connects the first valve to the fluid operated devices and selectively connects the second valve to the first valve whereby, for any one position of the two valves, only one of the fluid operated devices is connected to the fluid pressure source while the remainder of the fluid operated devices are open to exhaust. First and second ON/OFF solenoid operated valves facilitate positioning of the first and second valves in response to electrical signals received by the ON/OFF valves.

REFERENCES:
patent: 4046160 (1977-09-01), Horsch
patent: 4102132 (1978-07-01), Palmer
patent: 4308764 (1982-01-01), Kawamoto et al.
patent: 4351206 (1982-09-01), Lemieux et al.
patent: 4643285 (1987-02-01), Horsch
patent: 4653352 (1987-03-01), Nakao et al.
patent: 4674345 (1987-06-01), Furukawa et al.
patent: 4716933 (1988-01-01), Stoever et al.
patent: 4838126 (1989-06-01), Wilfinger et al.
patent: 4877116 (1989-10-01), Horsch
patent: 5038671 (1991-08-01), Ueno

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