Importance

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Abstract

A hydraulic system is disclosed. The hydraulic system may include an actuator configured to receive and discharge fluid via a first passage and a second passage, an input device configured to generate a signal indicative of a desire to operate the actuator, and pump configured to draw low-pressure fluid from one of the first and second passages and discharge fluid at an elevated pressure into the other of the first and second passages based on the signal from the input device. The hydraulic system may further include a charge circuit fluidly connected to the first and second passages, a force modulation control valve configured to selectively direct fluid from either of the first and second passages to the charge circuit based on the signal from the input device, and at least one relief valve configured to selectively direct fluid discharged from the pump to the charge circuit when the elevated pressure exceeds a pressure relief threshold.

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First Claim