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:
May. 26, 2009
Filed:
Mar. 27, 2008
Paul A. Wieshuber, River Grove, IL (US);
James T. Beaucaire, Wheaton, IL (US);
Michael A. Majewski, Joliet, IL (US);
Paul A. Wieshuber, River Grove, IL (US);
James T. Beaucaire, Wheaton, IL (US);
Michael A. Majewski, Joliet, IL (US);
International Engine Intellectual Property Company, LLC, Warrenville, IL (US);
Abstract
A PI control strategy controls engine speed to an engine speed set-point. A proportional map () is populated with data values to be used in calculating the P component of the strategy. An integral map () is populated with data values to be used in calculating the I component. Each data value in the maps is correlated with a speed data value representing engine speed (N) and a speed error data value representing the difference between engine speed and engine speed set-point (N_DIF_MAX_LIM). Values for proportional and integral components are selected from the respective maps by processing current engine speed data and current engine speed error data. The strategy uses the values from the maps for controlling engine speed to the speed set-point. Data values from other maps (and; orand) modify the selected values from the proportional and integral maps () for transmission type, transmission gear, and engine temperature.