Auxiliary drive system with neutral

Details Auxiliary drive system with neutral Auxiliary drive system with neutral

1979-08-23

1980-12-30

Cohen, Irwin C.

Power plants

Pressure fluid source and motor

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

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

Patent

active

042415772

ABSTRACT:
The steerable wheels of a hydraulically driven vehicle are provided with 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 hydraulic motor. The auxiliary motors are of the variable displacement type, enabling them to be destroked to neutral when disconnected from the main pump. Destroking to neutral eliminates energy loss due to the pumping of large quantities of hydraulic fluid through a closed loop when the motors are driven by the wheels.

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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