Patent ID: 9713307
Date: 2017-07-25
CPC Classifications: A01G,F15B,F16K,G05B

Claim:
1. A method of controlling a piloted spool valve with a first proportional pilot valve and a second proportional pilot valve, the method comprising: generating a first control signal for moving a spool of the piloted spool valve in a first direction; generating a second control signal as a function of the generated first control signal, the second control signal for moving the spool of the piloted spool valve in a second direction, the second direction being opposite of the first direction; applying the first control signal to the first proportional pilot valve to move the spool of the piloted spool valve in the first direction; applying the second control signal to the second proportional pilot valve to move the spool of the piloted spool valve in the second direction at substantially the same time as the applying of the first control signal; moving the spool of the piloted spool valve by a combined amount and in a combined direction determined by both the first control signal and the second control signal.