Method for optimizing an operating function of a ground milling machine and ground milling machine

Patent metadata

Field	Value
Publication number	US-9864347-B2
Application number	US-201514620799-A
Country	US
Kind code	B2
Filing date	Feb 12, 2015
Priority date	Feb 12, 2014
Publication date	Jan 9, 2018
Grant date	Jan 9, 2018

Abstract

The present invention relates to a method for optimizing an operating function of a ground milling machine by way of the adaptation of operating parameters and to a ground milling machine which is implemented, in particular, for carrying out this method. In an essential aspect an operating parameter of a milling machine is provided starting from a starting value of the operating parameter to optimize an operating function of the ground milling machine in milling operation.

First claim

What is claimed is:

1. A method for optimizing an operating function of a ground milling machine, comprising the following method steps:
a) predefining a starting value (P 0 ) for a variable operating parameter of the ground milling machine;
b) establishing and setting a value of at least one constant operating parameter (C n ) of the ground milling machine;
c) starting the milling operation and detecting a starting value (F 0 ) of an operating function to be optimized of the ground milling machine;
d) varying a value (P) of the variable operating parameter in milling operation toward an alternative value (P′) which is greater or less than the starting value (P 0 );
e) checking whether a value (F) of the operating function to be optimized increases or decreases;
f) repeating steps d) and e) until reaching an optimum value of the operating function, wherein the optimum value of the operating function can be a maximum value or a minimum value.

2. The method according to claim 1 ,
wherein the variable operating parameter is the rotational speed of the milling drum or the motor power of the drive motor of the milling rotor.

3. The method according to claim 1 ,
wherein the operating function to be optimized is the advance velocity of the ground milling machine or the milling performance of the ground milling machine or the fuel efficiency of the ground milling machine or the deviation of the actual advance velocity of the ground milling machine from a target advance velocity.

4. The method according to claim 1 ,
wherein the variation of the value of the operating parameter (P) according to step d) is performed at fixed intervals of the value of the operating parameter.

5. The method according to claim 1 ,
wherein the checking according to step e) is performed in such a manner that exceeding or falling below difference threshold values of the operating function is checked.

6. The method according to claim 1 ,
wherein after reaching the optimum value of the operating function in step f), the milling operation is continued with the operating parameter (P′) then ascertained.

7. The method according to claim 1 ,
wherein steps a) to f) are continued continuously over the entire milling process.

8. The method according to claim 1 , wherein the variable operating parameter is the rotational speed of the milling drum,
and further wherein the variation of the rotational speed (U) according to step d) of the milling drum is performed via a summation transmission, in particular a planetary transmission, by variation of at least one input rotational speed of one of at least two drive units.

9. The method according to claim 1 ,
wherein steps a) to f) are controlled by an automatic controller.

10. A ground milling machine, comprising:
a machine frame, travel units, a drive unit, and a milling drum, to which drive energy is transmittable from the drive unit via a drive train, and a unit for ascertaining the advance velocity,
wherein a control unit for controlling the milling drum operation is provided, which is implemented in such a manner that, proceeding from a predefined starting advance velocity, the control unit varies the rotational speed (U) of the milling drum from a starting rotational speed (U a ) to achieve a maximum advance velocity, and
wherein the ground milling machine is implemented to carry out the method of claim 1 .

11. The ground milling machine according to claim 10 ,
wherein the ground milling machine is a road milling machine.

12. The ground milling machine according to claim 10 ,
wherein the control unit is implemented to control an auxiliary drive, the drive power of which is fed via a summation transmission into a drive train between the main drive unit and the milling drum.

13. The ground milling machine according to claim 12 ,
wherein the summation transmission is a planetary transmission.

14. The ground milling machine according to claim 12 ,
wherein the auxiliary drive is an electric motor or a hydraulic motor.

15. The ground milling machine according to claim 12 ,
wherein the ground milling machine is a central rotor milling machine.

Assignees

• Bomag Gmbh

Inventors

• Laux Robert
• Reuter Marco

Classifications

• G05B13/021 Primary

  in which a variable is automatically adjusted to optimise the performance · CPC title

• E01C23/088

  Rotary tools, e.g. milling drums {(for forming recesses to receive marking materials E01C23/0946)} · CPC title

• E01C23/127

  rotary, e.g. rotary hammers · CPC title