Hydraulic control of epicyclic-type change-speed gearbox

Details Hydraulic control of epicyclic-type change-speed gearbox Hydraulic control of epicyclic-type change-speed gearbox

1992-09-23

1994-01-11

Bonck, Rodney H.

Planetary gear transmission systems or components

Fluid drive or control of planetary gearing

Fluid controlled mechanical clutch or brake

F16H 6118

Patent

active

052776719

ABSTRACT:
An automatic selector device for actuating a frictional selector device, i.e. a clutch or brake, combines a selector actuator, a selector valve for the working pressure of the selector actuator, a change control valve dependent on the steady-state condition of the selector device and a switch-over control valve which can be triggered by an electronic control unit. In the case of failure of the control unit or the voltage supply, the selector device remains actuated in its instantaneous steady-state condition.

REFERENCES:
patent: 5199313 (1993-04-01), Muller
Neue Vollautomatische Nutzfahrzeuggetriebe von Daimler-Benz; Wolfgang Meller, Karl-Friedrich Kraft and Lutz Paulsen; pp. 677-682, 1986 ATZ.

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