Integration of Swing Energy Recovery and Engine Anti-Idling Systems

摘要

Engine anti-idling and restart may be implemented in a machine having a power source, a movable work tool, a pump driven by the power source, an actuator receiving fluid from the pump and moving the work tool, a high-pressure fluid reservoir, and an assist motor operatively connected to the power source. Engine restart may include detecting operator input to start the power source, and fluidly connecting the fluid reservoir to the assist motor to assist in starting the power source in response to detecting the operator input. Prior to shutting down the power source during anti-idling, fluid from the pump may be input to the assist motor, pressurized and communicated to the high-pressure fluid reservoir in response to determining that idle condition exists and a reservoir charge pressure is less than a reservoir minimum restart pressure needed to restart the power source.

主权项

1. A hydraulic control system for a machine having a power source, comprising:
a work tool movable through a range of motion; a pump driven by the power source to pressurize fluid; an actuator configured to receive pressurized fluid from the pump and move the work tool; a first accumulator selectively fluidly connected to the pump and to the actuator; an assist motor operatively connected to the power source; a discharge valve having a normally closed position and an open position, the discharge valve positioned to selectively fluidly connect the first accumulator to the assist motor; and a controller operatively connected to the discharge valve, wherein: the controller is configured to detect operator input to start the power source, and the controller is configured to cause the discharge valve to move to the open position to fluidly connect the first accumulator to the assist motor to assist in starting the power source in response to detecting the operator input to start the power source.