System and method for controlling load dependent valve flow with an overruning load

A method for controlling load dependent valve flow rate in a presence of an overrunning load in a bucket of a work vehicle, comprising:

• receiving, at the controller, feedback from one or more pressure sensors, wherein the feedback represents one or more measured pressures from and/or to a hydraulic valve, and the hydraulic valve is coupled to an actuator coupled to the bucket with the overrunning load;
• calculating, via the controller, a load pressure on the actuator based on the feedback;
• receiving, at the controller, a first valve command for actuating the actuator to lower the bucket with the overrunning load, wherein the first valve command is received from an operator interface of the work vehicle, and wherein the valve command is associated with a first desired valve flow rate through the hydraulic valve and a first desired maximum speed of the actuator;
• and
• providing, via the controller, a second valve command based on a last calculated load pressure before receiving the first valve command, wherein the second valve command adjusts a valve opening area of the hydraulic valve so that a speed of the actuator corresponds to a maximum speed of the actuator for the last calculated load pressure.

A method for controlling actuator speed in a presence of an overrunning load in a bucket of a work vehicle, comprising:

• receiving, at a controller, a first input from an operator interface of the work vehicle, wherein the first input comprises a selected target speed from among a plurality of target speeds for an actuator coupled to the bucket, wherein the plurality of target speeds range between 0 percent and 100 percent;
• determining, via the controller, a maximum valve command for actuating the actuator to lower the bucket with the overrunning load based on the selected target speed, wherein the maximum valve command ranges between 0 percent and 100 percent, and wherein the maximum valve command is associated with a valve flow rate through a hydraulic valve coupled to the actuator;
• determining, via the controller, whether a speed limitation feature is enabled;
• adjusting, via the controller, the maximum valve command and providing the adjusted maximum valve command to the hydraulic valve, wherein the adjusted maximum valve command keeps the actuator from exceeding the target speed when the speed limitation feature is enabled;
• and
• providing, via the controller, the maximum valve command to the hydraulic valve unadjusted when the speed limitation feature is not enabled.