Header flotation system with computer control for a self-propelled windrower

摘要

In one embodiment, a header control method for an agricultural machine, the method comprising receiving, through a graphical user interface, operator input corresponding to a first set point and a second set point for flotation pressures corresponding to independently controllable first and second header portions, respectively; and automatically causing first and second sets of hydraulic valves to increase or decrease pressure to the first or second header portions to meet or at least approximate the first and second set points, the first and second sets each comprising opposing-action hydraulic valves, the causing responsive to sensed pressure at respective first and second accumulators associated with respective first and second float cylinders.

主权项

1. A header control system for an agricultural machine, the system comprising:
a left flotation assembly corresponding to a first portion of a header, the left flotation assembly comprising:
a first serial arrangement of first set of pressure adjusting valves;a first accumulator; anda first float cylinder coupled to the first accumulator, the first set of pressure adjusting valves configured to pass fluid from a pump to the first accumulator and the first float cylinder; a right flotation assembly corresponding to a second portion of the header, the right flotation assembly comprising:
a second serial arrangement of a second set of pressure adjusting valves;a second accumulator; anda second float cylinder coupled to the second accumulator, the second set of pressure adjusting valves configured to pass fluid from the pump to the second accumulator and the second float cylinder; wherein either the first set or the second set comprises plural opposing action valves; and a controller coupled to the first and second set of pressure adjusting valves, the controller configured to control the first and second flotation assemblies according to a plurality of different operation modes, wherein the controller is configured to adjust one or more valve openings for the plural opposing valves based on a set point.