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Description: Method and Apparatus for Controlling an Implement of an Earthmoving Machine at End of Work Cycle

IP.com Disclosure Number: IPCOM000128817D
Original Publication Date: 1997-Mar-26
Included in the Prior Art Database: 2005-Sep-19
Document File: 6 page(s) / 24K

Publishing Venue

Software Patent Institute

Related People

Anonymous: AUTHOR [+2]

Abstract

In one aspect of the present invention, a method for controlling a work implement of an earthmoving machine is provided. The earthmoving machine operates in a work cycle having at least first, second, and third operating portions. The method includes the steps of detecting the first operating portion of the earthmoving machine, detecting the second operating portion of the earthmoving machine, and sensing a shift from a forward direction to a reverse direction. The method further includes the step of automatically raising the work implement to a predetermined position in response to detecting the first and second operating modes and sensing the shift from a forward to reverse direction.

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THIS DOCUMENT IS AN APPROXIMATE REPRESENTATION OF THE ORIGINAL.

Copyright ©; 1997.

Description: Method and Apparatus for Controlling an Implement of an Earthmoving Machine at End of Work Cycle

Technical Field

The present invention generally relates to a control system for an earthmoving machine and, more particularly, to a method and apparatus for controlling a work implement of an earthmoving machine.

Background Art

Earthmoving machine or off-highway vehicles, such as wheel loaders, bulldozers and track loaders have a bucket or other implement to move soil. The drawbacks to which the present invention is aimed are described herein with reference to a bulldozer. However, these same drawbacks are encountered on all other similar earthmoving machines.

Bulldozers typically operate in a four portion work cycle. This four portion work cycle includes a dig or load portion, a carry portion, a spread portion and a return portion. In the load portion, the operator cuts or scrapes the ground to loosen material. During the carry portion, the loosened material is pushed or carried to a different location. During the spread portion, the material is spread or dumped at the second location. The operator moves the machine back to some beginning portion during the return portion to begin a new work cycle.

It is optimum in terms of efficiency for the operator to raise the bucket during the return portion. However during the return portion, the operator may be occupied with steering the machine, shifting the transmission, and watching for obstacles. Thus, sometimes the operator does not raise the blade during the return portion of the work cycle.

This increases wear and tear on the bulldozer blade and additionally, affects the ground surface of the material.

The present invention is directed towards overcoming one or more of the problems addressed above.

Disclosure of the Invention

In one aspect of the present invention, a method for controlling a work implement of an earthmoving machine is provided. The earthmoving machine operates in a work cycle having at least first, second, and third operating portions. The method includes the steps of detecting the first operating portion of the earthmoving machine, detecting the second operating portion of the earthmoving machine, and sensing a shift from a forward direction to a reverse direction. The

Anonymous Page 1 Mar 26, 1997

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Description: Method and Apparatus for Controlling an Implement of an Earthmoving Machine at End of Work Cycle

method further includes the step of automatically raising the work implement to a predetermined position in response to detecting the first and second operating modes and sensing the shift from a forward to reverse direction.

In another aspect of the present invention, an apparatus for controlling a work implement of an earthmoving machine is provided. The earthmoving machine operates in a work cycle having at least first, second and third operating portions. An...