HYDRAULIC HEADER CONTROL OF A COMBINE HARVESTER

摘要

In one embodiment, a method of controlling a hydraulic header that is coupled to a feeder house of a combine harvester, the method comprising: providing, by a pump, a flow of hydraulic fluid through a first plurality of components fluidly coupled together, wherein in a first mode, the first plurality of components comprises a pump, a first-multi-position valve, a first port of a hydraulic cylinder, a second port of the hydraulic cylinder, a second-multi-position valve in a first position, and a well, wherein the hydraulic cylinder is affixed to the feeder house; providing, by the pump, a flow of hydraulic fluid through a second plurality of components fluidly coupled together, wherein in a second mode, the second plurality of components comprises the pump, the first-multi-position valve, the first port of the hydraulic cylinder, the second port of the hydraulic cylinder, the second-multi-position valve in a second position, and back to the first port of the hydraulic cylinder, bypassing the well and combining with the flow from a discharge of the pump; and switching between the first position and the second position to enable the switching between the first and second modes, wherein the header is raised by operation of the hydraulic cylinder according to the flow of the hydraulic fluid through the first plurality of components in the first mode and according to the flow of the hydraulic fluid through the second plurality of components in the second mode.

主权项

1. A combine harvester, comprising:
a chassis; a feeder house mounted to the chassis; a header mounted to the feeder house; and a control system, comprising:
a pump;a well;a hydraulic cylinder comprising a first port, a second port, and a piston and rod assembly that is bi-directionally moveable between the first and second ports, the hydraulic cylinder affixed to the feeder house and arranged to cause a raising and lowering of the feeder house and the header; anda cylinder circuit coupled to the first and second ports and switchably configurable between a first mode and a second mode of header raising operations, the cylinder circuit comprising:
a first multi-position valve coupled between an outlet of the pump and the first port; anda second multi-position valve coupled to the second port, wherein in the first mode, a first fluidic circuit is established in series between the pump, the multi-position valve in a first position, the first port, the second port, the second multi-position valve in a first position, and the well, wherein in the second mode, a second fluidic circuit is established in series between the pump, the multi-position valve in the first position, the first port, the second port, the second multi-position valve in a second position, and the first port.