HYDRAULIC MOTOR CONTROL SYSTEM AND METHOD
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United States of America
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Issued Date -
Feb 3, 2022
app pub date -
Jun 16, 2021
filing date -
Jun 16, 2021
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Abstract
An electrohydraulic system for a work machine includes a pump, a motor fluidly coupled to the pump, a subassembly driven by the motor, and a rate-control valve fluidly coupled to the pump and the motor. The rate-control valve is movable through a range of positions. A present speed of the motor is proportional to a present position of the rate-control valve. The present position of the rate-control valve is adjustable by varying a current supplied to the rate-control valve. The supply of current to the rate-control valve is adjusted based on the difference between the present speed of the motor and a target speed of the motor.
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