Patent ID: 8958963
Filing Date: 2015-02-17
Classification: F16D,F16H,Y10T

Abstract:
1. A method for controlling pressure of hydraulic fluid supplied within a transmission of a work vehicle, the method comprising: receiving a signal associated with a load condition of the work vehicle, wherein the work vehicle includes the transmission having an input shaft, a counter shaft, and a first driven shaft and a second driven shaft extending parallel to the input and counter shafts; determining a first desired clutch pressure for a first clutch associated with the first driven shaft based on the load condition; determining a second desired clutch pressure for a second clutch associated with the second driven shaft based on the load condition; controlling clutch valves associated with the first and second clutches such that the hydraulic fluid is supplied within the first clutch at the first desired clutch pressure and the hydraulic fluid is supplied within the second clutch at the second desired clutch pressure; determining a desired system pressure for the hydraulic fluid supplied to the transmission based on the first and second desired clutch pressures, wherein determining the desired system pressure for the hydraulic fluid supplied to the transmission comprises setting the desired system pressure to a pressure above the greater of the first desired clutch pressure and the second desired clutch pressure; and controlling a system valve such that the hydraulic fluid is supplied to the clutch valves at the desired system pressure.