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.:
Date of Patent:
Nov. 16, 2004
Filed:
Feb. 04, 2002
Dusan Janic, Columbus, IN (US);
Chris Gilmore, Columbus, IN (US);
R. Scott Malindzak, Mt. Pleasant, SC (US);
Spencer C. Lewis, Jr., Mt. Pleasant, SC (US);
Richard Newman, Charleston, SC (US);
Cummins, Inc., Columbus, IN (US);
Abstract
A system and method are disclosed for controlling idle speed of an internal combustion engine. The system includes an engine speed sensor producing an engine speed signal indicative of a rotational engine speed of an internal combustion engine, and a control circuit. The control circuit controls the rotational speed of the engine between an idle speed reference and a maximum speed reference. The control circuit also modifies the idle speed reference as a function of the engine speed. Additionally, the control circuit may determine an engine acceleration rate as a function of the engine speed, and modify the idle speed reference as a function of the engine speed and the engine acceleration rate.