Patent ID: 7283900

Claim:
A method of operating a steering system of a work vehicle, comprising: sensing a steering input and a speed of the work vehicle, selecting a flow-metering curve among a plurality of flow-metering curves representing different steering ratios using the vehicle speed, steering ratio defined as steering output/steering input, determining a desired valve position setting for a steering valve using the steering input and the selected flow-metering curve, and commanding that the steering valve assume the desired valve position setting to effect a corresponding steering output, wherein the selecting comprises determining a target flow-metering curve among the plurality of flow-metering curves and transitioning from an initial flow-metering curve of the plurality of flow-metering curves to the target flow-metering curve in response to a change in the vehicle speed, the plurality of flow-metering curves comprises a number of intermediate curves between the initial flow-metering curve and the target flow-metering curve, and the transitioning comprises stepping sequentially through each intermediate curve.