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The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 9617929 B1

PDFFull Text
Date of Patent:
Apr. 11, 2017

Filed:

Dec. 10, 2012

Method for adjusting the rotational speed of an internal combustion engine of a road-building machine, and road-building machine for said method

Applicant:

Abg Allgemeine Baumaschinen-gesellschaft Mbh, Hameln, DE;

Inventor:

Heinz Tiedemann, Emmerthal, DE;

Assignee:

ABG Allgemeine Baumaschinen-Gesellschaft MBH, Hameln, DE;

Attorney:

Kilpatrick Townsend & Stockton LLP

Primary Examiner:

Raymond W Addie

Int. Cl.
CPC ...
E01C 19/00 (2006.01); F02D 31/00 (2006.01); B60W 10/06 (2006.01); B60W 10/103 (2012.01); B60W 10/30 (2006.01); B60W 30/188 (2012.01); E01C 19/48 (2006.01); F16H 61/4035 (2010.01); F16H 61/4148 (2010.01); F16H 61/448 (2010.01); F16H 61/46 (2010.01); E01C 19/02 (2006.01); E01C 19/12 (2006.01); E01C 19/22 (2006.01);
U.S. Cl.
CPC ...
F02D 31/007 (2013.01); B60W 10/06 (2013.01); B60W 10/103 (2013.01); B60W 10/30 (2013.01); B60W 30/1882 (2013.01); B60W 30/1886 (2013.01); E01C 19/002 (2013.01); E01C 19/02 (2013.01); E01C 19/12 (2013.01); E01C 19/22 (2013.01); E01C 19/48 (2013.01); F16H 61/4035 (2013.01); F16H 61/4148 (2013.01); F16H 61/448 (2013.01); F16H 61/461 (2013.01); B60Y 2200/414 (2013.01);
Abstract

A method for adjusting the rotational speed of an internal combustion engine of a road-building machine which, in addition to a traction drive, has hydraulic motors which are connected to the internal combustion engine and which serve for driving working assemblies, in which method the rotational speed is adjusted as a function of the present power demand of the working assemblies, characterized in that the hydraulic motors are operated using fixed-displacement pumps, and residual volume flows presently to be discharged are reduced by flow valves for hydraulic motors of active working assemblies, for which purpose the rotational speed of the internal combustion engine is automatically adapted during working operation.

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