US 11,866,893 B2
Self-propelled construction machine and method for operating a self-propelled construction machine
Christian Berning, Zülpich (DE); Rene′ Müller, Vettelschoß (DE); Sebastian Hofrath, Hennef (DE); and Cyrus Barimani, Königswinter (DE)
Assigned to Wirtgen GmbH
Filed by Wirtgen GmbH, Windhagen (DE)
Filed on Aug. 11, 2022, as Appl. No. 17/885,651.
Application 17/885,651 is a continuation of application No. 16/991,318, filed on Aug. 12, 2020, granted, now 11,414,820.
Application 16/991,318 is a continuation in part of application No. 16/528,285, filed on Jul. 31, 2019, granted, now 10,745,869, issued on Aug. 18, 2020.
Application 16/528,285 is a continuation of application No. 15/428,177, filed on Feb. 9, 2017, granted, now 10,370,803, issued on Aug. 6, 2019.
Claims priority of application No. 10 2016 001 720.1 (DE), filed on Feb. 16, 2016.
Prior Publication US 2023/0029757 A1, Feb. 2, 2023
Int. Cl. E01C 23/088 (2006.01); E01C 23/12 (2006.01)
CPC E01C 23/088 (2013.01) [E01C 23/127 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A method for operating a self-propelled construction machine having a milling drum for machining the ground, the height of which drum is adjustable with respect to a surface of the ground to be machined such that material is removed from the ground, the method comprising:
when an advance speed of the construction machine is zero, lowering the milling drum to a first position wherein a lower edge of a cutting circle of the milling drum is at a level of the surface of the ground, wherein a milling depth of the milling drum is calibrated to zero;
while the advance speed of the construction machine is still zero, lowering the milling drum from the first position into a second position wherein the lower edge of the cutting circle of the milling drum is at a distance from the level of the surface of the ground corresponding to an initial specified milling depth;
while machining the ground at an advance speed above zero, continuously adjusting a position of the milling drum, dependent on a type of the milling drum, the advance speed of the construction machine, and a rotation speed of the milling drum, wherein the specified milling depth is corrected to correspond to a desired milling profile; and
when the construction machine returns to an advance speed of zero, raising the milling drum to at least a position wherein the lower edge of the cutting circle of the milling drum is at a distance from the level of the surface of the ground corresponding to a current specified milling depth.