摘要 |
In an agricultural combine, a header terrain following system using a floating header having a frame, a support member supporting the frame from the ground, and a suspension variably supporting the frame from a feederhouse moveably attaching at the front of the combine. A lift cylinder supports and articulates the feederhouse from the combine, and a lift valve connects the lift cylinder to a main hydraulic circuit. A position sensor adapted to sense vertical position of the frame relative to the feederhouse attaches to the floating header. A controller communicates with the lift valve and the position sensor. The controller maintains vertical position of the frame relative to the feederhouse at a nominal value by continuously reading the position sensor and commanding the lift valve to add or subtract hydraulic fluid in the lift cylinder until position reads at the nominal value.
|