Auxiliary hydrostatic drive system

Details Auxiliary hydrostatic drive system Auxiliary hydrostatic drive system

B - Operations, Transporting

60

K

138/41.16

B60K 17/34 (2006.01) B60K 17/10 (2006.01) B60K 17/356 (2006.01) F16H 39/02 (2006.01)

Patent

CA 1126621

AUXILIARY HYDROSTATIC DRIVE SYSTEM Abstract of the Disclosure 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 dis- placement 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 al- lows the motors to circulate large quantities of fluid around a closed loop at minimum pressure drop.

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