Adaptive advance drive control for milling machine
AssigneeWirtgen GmbH
InventorsChristoph Menzenbach, Axel Mahlberg, Herbert Lange, Cyrus Barimani, Gunter Hahn
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Abstract
An adaptive advance control system for a construction machine senses the reaction forces applied by the ground surface to a milling drum, and in response to the sensed changes in those reaction forces controls the motive power applied to an advance drive of the machine. Early and rapid detection of such changes in reaction forces allow the control system to aid in preventing lurch forward events of the construction machine.
Claims30
A method of controlling a construction machine having a frame, a milling drum supported from the frame for milling a ground surface, a plurality of ground engaging supports engaging the ground surface and supporting the frame, and an advance drive associated with at least one of the ground engaging supports to provide motive power to the at least one ground engaging support, the method comprising:
- (a) operating the milling drum in a down cut mode;
- (b) applying motive power to the advance drive and moving the construction machine forward at an advance speed;
- (c) sensing a parameter corresponding to a reaction force acting on the milling drum;
- (d) detecting a change in the sensed parameter corresponding to an increase in the reaction force;
- and
- (e) in response to detecting the change in step (d), and while continuing to operate the milling drum in the down cut mode, reducing the motive power provided to the advance drive to reduce the advance speed and thereby reducing the reaction force and preventing a lurch forward event.
A construction machine, comprising:
- a frame;
- a milling drum supported from the frame for milling a ground surface, the milling drum constructed to operate in a down cut mode;
- a plurality of ground engaging supports supporting the frame from the ground surface;
- an advance drive associated with at least one of the ground engaging supports to provide motive power to advance the construction machine across the ground surface;
- at least one sensor arranged to detect a parameter corresponding to a reaction force from the ground surface acting on the milling drum;
- an actuator operably associated with the advance drive to control the motive power output by the advance drive;
- and
- a controller connected to the sensor to receive an input signal from the sensor, and connected to the actuator to send a control signal to the actuator, the controller including an operating routine which detects a change in the sensed parameter corresponding to an increase in reaction force and in response to the change reduces motive power provided to the advance drive to aid in preventing a lurch forward event of the construction machine.
Dependencies are inferred from the claim text.