Patent ID: 6058343
Filing Date: 2000-05-02
Classification: A01B,E02F

Abstract:
A system for controlling the position of an implement coupled to a work vehicle, the implement being moveable by a hydraulic positioning assembly comprising an actuator and a valve assembly configured to control the flow of fluid to and from the actuator in response to control signals, the valve assembly requiring control signals substantially equal to a first threshold value before fluid begins to flow, the system comprising:a sensor configured to detect the position of the implement and to generate a signal representative thereof;a control circuit coupled to the sensor and the valve assembly, the control circuit configured to generate the control signals applied to the valve assembly based upon the first threshold value in response to a change in a position command signal and, after detecting undesirable implement movement based at least upon the sensed position signal, to generate the control signals based upon a modified threshold value; anda memory circuit coupled to the control circuit, the memory storing the modified threshold value and wherein the control circuit uses the modified threshold value as the first threshold value for subsequent valve actuation.