Hydraulic System Including Independent Metering Valve with Flowsharing

摘要

An independent metering valve circuit includes an actuator, a set of independent metering valves, an independent metering valve pre-compensator, an inverse resolver, and a signal conditioning element. The set of independent metering valves are fluidly coupled to the actuator and configured to independently control a flow of a hydraulic fluid to the actuator. The independent metering valve pre-compensator is configured to control the flow of the hydraulic fluid to the set of independent metering valves. The inverse resolver is configured to receive a first pressure signal from the independent metering valve circuit and a second pressure signal from a load-sense hydraulic system and output a third pressure signal. The signal conditioning element is configured to receive the third pressure signal and output a forth pressure signal configured to control a pump fluidly coupled to the load-sense hydraulic system and the independent metering valve circuit.

主权项

1. A hydraulic system, comprising:
a first pump configured to generate a flow of a hydraulic fluid; a variable flow controller configured to control a flow rate of the first pump in response to a first pressure signal; a load-sense circuit fluidly coupled to the first pump, the load-sense circuit including:
a first actuator; and,a first control valve fluidly coupled to the first actuator and configured to control a flow of the hydraulic fluid to the first actuator, the first control valve having a signal port fluidly coupled to the variable flow controller and configured to generate a second pressure signal; an independent metering valve circuit fluidly coupled to the first pump and configured to generate a third pressure signal, the independent metering valve circuit including:
a second actuator;a set of independent metering valves fluidly coupled to the second actuator and configured to independently control the flow of the hydraulic fluid to the second actuator; andan independent metering valve pre-compensator configured to control the flow of the hydraulic fluid to the set of independent metering valves; an inverse resolver configured to receive the second pressure signal and the third pressure signal and output a fourth pressure signal; and a signal conditioning element configured to receive the fourth pressure signal and output the first pressure signal.