US 12,410,567 B2
Ground milling machine, in particular stabiliser or recycler, and method of operating a ground milling machine
Christoph Menzenbach, Neustadt (DE)
Assigned to Wirtgen GmbH, Windhagen (DE)
Filed by Wirtgen GmbH, Windhagen (DE)
Filed on Nov. 28, 2022, as Appl. No. 18/059,284.
Prior Publication US 2023/0175213 A1, Jun. 8, 2023
Int. Cl. E01C 23/088 (2006.01)
CPC E01C 23/088 (2013.01) 16 Claims
OG exemplary drawing
 
10. A method of operating a ground milling machine, the ground milling machine including a machine frame, a roller housing having an open bottom and including a rear roller flap pivotable about a pivot axis extending transversely to a longitudinal direction of the machine frame so that a lower edge of the rear roller flap is adjustable in height relative to a ground surface, a milling roller received in the roller housing, the rear roller flap having a floating mode in which the lower edge of the rear roller flap rests on the ground surface, the method comprising:
activating a roller flap correction mode of a controller, the roller flap correction mode including at least one roller flap position correction cycle including:
(a) cancelling the floating mode of the rear roller flap, and pivoting the rear roller flap upwards from a first pivoted position into a second pivoted position such that the lower edge of the rear roller flap is raised; and
(b) after the rear roller flap is in the second pivoted position, again activating the floating mode of the rear roller flap such that the rear roller flap is pivoted to a third pivoted position in which the lower edge of the rear roller flap again rests on the ground surface
wherein the at least one roller flap position correction cycle includes a checking routine including:
comparing a value of a variable correlating with the third pivoted position with a threshold value or with a value correlating with the first pivoted position, and
deactivating the roller flap position correction mode based on the comparing of the value of the variable correlating with the third pivoted position with the threshold value or with the value correlating with the first pivoted position;
wherein the variable correlating with the first and third pivoted positions is a variable correlating with the height of the lower edge of the rear roller flap above the ground surface; and
wherein the checking routine includes repeating the roller flap position correction cycle until it is determined at least once that the height of the lower edge of the rear roller flap in the third pivoted position is equal to or less than the height of the lower edge of the rear roller flap in the first pivoted position.