Patent ID: 9309632
Filing Date: 2016-04-12
CPC Classification: B62D,E01C

Claim Text:
1. An automotive construction machine, comprising: a machine frame having a working direction; at least one front running gear and at least one rear running gear configured to support the machine frame from a ground surface; a working device supported from the machine frame; front and rear lifting systems connected between the machine frame and the front and rear running gears, respectively, for adjusting a height and orientation of the machine frame relative to the ground surface; and a control unit operably associated with the lifting systems, the control unit being configured such that: the front lifting system is controlled such that the machine frame remains in a predetermined orientation with respect to the ground surface in the working direction as the construction machine advances; the rear lifting system is controlled such that the working device remains at a predetermined height relative to the ground surface as the construction machine advances; and the rear lifting system is correctively controlled with a time delay in response to control of the front lifting system so that the height of the working device relative to the ground surface is corrected by the rear lifting system at least in part to compensate for unevenness of the ground surface.