SYSTEM AND METHOD FOR CALIBRATING ELECTROHYDRAULIC VALVE

摘要

A method of calibrating an electrohydraulic valve is disclosed. The method includes actuating an on-off valve to an open position. A speed of a fixed displacement pump is regulated to establish a desired flow rate at an outlet of the pump. The pump is in fluid communication within a closed loop circuit with the on-off valve and the electrohydraulic valve. A target pressure in the closed loop circuit is determined as a function of the desired flow rate. The method further includes increasing a current to the electrohydraulic valve and monitoring the target pressure in the closed loop circuit. A start of a fluid flow through the electrohydraulic valve is determined based on a drop in the target pressure within the closed loop circuit.

主权项

1. A method of calibrating an electrohydraulic valve, the method comprising:
actuating an on-off valve to an open position, wherein the on-off valve is configured to provide a set flow restriction to a fluid flow therethrough in the open position, with flow through the on-off valve having a known pressure at a known flow rate; regulating a speed of a fixed displacement pump to establish a desired flow rate at an outlet of the pump, wherein the pump is in fluid communication within a closed loop circuit with the on-off valve and the electrohydraulic valve; determining a target pressure in the closed loop circuit as a function of the desired flow rate; increasing a current to the electrohydraulic valve; monitoring the target pressure in the closed loop circuit; and determining a start of a fluid flow through the electrohydraulic valve based on a drop in the target pressure within the closed loop circuit.