Load signal control of hydraulic motor displacement

F - Mech Eng,Light,Heat,Weapons – 16 – H

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138/41.16

F16H 39/02 (2006.01) F16H 61/46 (2006.01)

Patent

CA 1105360

Load Signal Control of Hydraulic Motor Displacement Abstract A vehicle drive and work performing system including a rotary output, variable displacement, hydraulic drive motor adapted to drive a vehicle, at least one hydraulic implement motor adapted to power a work performing implement, a hydraulic pump providing hydraulic fluid under pressure to the motors, a flow control valve for controlling the fluid flow from the pump to at least the drive motor, and a pressure control valve for controlling the displacement of the drive motor to achieve a desired fluid pressure level at the drive motor, and including the improvement wherein a load sensor is connected to the implement motor for providing a signal representing the load thereon and a piston is responsive to the signal for causing the pressure control valve to change the displacement of the drive motor to thereby change the fluid pressure level thereat to a value different from the desired fluid pressure level.

337550

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