Control system for hydraulically driven vehicles

Details Control system for hydraulically driven vehicles Control system for hydraulically driven vehicles

1981-12-21

1984-11-13

Cohen, Irwin C.

Power plants

Pressure fluid source and motor

Having a mechanical clutch or brake device in the power train

60442, 60445, 60451, F16H 3904, F16H 3946

Patent

active

044817690

ABSTRACT:
A control system for a hydraulically driven vehicle having a variable displacement hydraulic motor connected with a variable displacement hydraulic pump in a closed loop and driven thereby.
A spring-applied and fluid-released brake is mounted on an output shaft of the motor. A regulator is operatively connected to the motor for controlling the displacement thereof in response to a fluid pressure at both ports thereof. When fluid pressure at either one of the ports of the motor exceeds a predetermined level, the variable displacement motor is changed over to a high displacement position thereby generating a large braking force when the vehicle is to be stopped.

REFERENCES:
patent: 3411297 (1968-11-01), Hann
patent: 3734225 (1973-05-01), Kobald et al.
(New Product Introduction), Ebara Compact Two-Speed Change-Over Hydraulic Motor TOM170VS.sub.2.

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