Road construction machine, leveling device, as well as method for controlling the milling depth or milling slope in a road construction machine

CAFC
  • US 8,308,395 B2
  • Filed: 05/02/2011
  • Issued: 11/13/2012
  • Est. Priority Date: 04/27/2006
  • Status: Active Grant
First Claim
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1. A road construction machine for the treatment of road surfaces, comprising:

  • a milling drum, the milling drum being position adjustable with regard to at least one position characteristic selected from the group consisting of milling depth of the drum and slope of the drum; and

    a leveling system configured to control the at least one position characteristic, the leveling system including;

    a plurality of selectable sensors, each sensor configured to sense a current actual value of an operating parameter corresponding to at least one of the milling depth of the drum and the slope of the drum;

    a plurality of indication and setting devices, each of the indication and setting devices being associatable with at least one of the plurality of selectable sensors, each indication and setting device being operable to indicate the current actual value of and to set a set value for each operating parameter sensed by its associated sensor or sensors;

    a controller and switchover system configured to control the at least one position characteristic conditioned on set value or values and sensed current actual value or values of the operating parameter or parameters sensed by a selected subset of the plurality of selectable sensors by returning at least one adjustment value to adjust the at least one position characteristic so that the sensed current actual value or values of the operating parameter or parameters approach the set value or values for the selected subset of the plurality of selectable sensors; and

    the controller and switchover system being configured to switch over from control based upon a first selected subset of the plurality of selectable sensors to control based upon a second selected subset during milling operation without interruption of the milling operation and without any erratic alteration of the at least one adjustment value, the second selected subset exchanging at least one replacement sensor not in the first subset for at least one replaced sensor that was in the first subset.

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