Hydrostatic transmission control

Details Hydrostatic transmission control Hydrostatic transmission control

F - Mech Eng,Light,Heat,Weapons

16

H

138/41.16

F16H 61/46 (2006.01)

Patent

CA 1063910

ABSTRACT OF THE DISCLOSURE To provide a closed loop hydrostatic transmission of pump and motor with a true acceleration control for the motor drive shaft, as opposed to a velocity control which may be achieved by varying the relative volume displacement of the pump and motor, the maximum delivery pressure of the pump is set by an accelerator and the relative volume of the pump and the motor is varied automatically by control means to maintain the pump delivery pressure at the maximum determined by the setting of the accelerator. Thus the closed loop system maintains a substantially constant maximum pressure throughout the flow range of the transmission for each accelerator setting, and since the output torque of the motor is proportional to this system pressure, a true acceleration control is achieved.

272049

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