Auxiliary hydrostatic drive system

Details Auxiliary hydrostatic drive system Auxiliary hydrostatic drive system

1979-08-23

1981-01-13

Cohen, Irwin C.

Power plants

Pressure fluid source and motor

Having condition responsive control in a system of distinct...

60483, 60484, 91523, 91532, 180242, 180307, 180308, B60K 1734, F15B 1106, F15B 1306

Patent

active

042441846

ABSTRACT:
The steerable wheels of a hydraulically driven vehicle are provided with fixed displacement type auxiliary motors which are connected in parallel both with each other and with the motor which powers the main drive wheels. A selector valve permits the motors for the steerable wheels to be optionally connected and disconnected from the reversible, variable displacement main pump. Flow dividers in the hydraulic lines limit the maximum flow of fluid to any one auxiliary drive motor. To prevent large power losses when the steerable wheel assist mode is not being utilized, the selector valves are placed in close proximity to each fixed displacement motor. This allows the motors to circulate large quantities of fluid around a closed loop at minimum pressure drop.

REFERENCES:
patent: 3114424 (1963-12-01), Voreaux et al.
patent: 3736732 (1973-06-01), Jennings et al.
patent: 3997017 (1976-12-01), Campbell et al.
patent: 4072009 (1978-02-01), Daschievici et al.
patent: 4140196 (1979-02-01), Brewer

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