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:
Mar. 09, 2004
Filed:
Aug. 22, 2002
Brett Denton Collins, Tucson, AZ (US);
Lawrence Andrew Mianzo, Plymouth, MI (US);
Visteon Global Technologies, Inc., Dearborn, MI (US);
Abstract
A method for determining valve timing events to optimize operating parameters of an engine having a variable valve timing system over an entire operating range of the engine. The method includes setting combinations of intake valve opening and closing timing events and exhaust valve opening and closing timing events for a given engine speed. For each combination, a fuel conversion efficiency measure and an emissions measure of the engine at the given engine speed is obtained. Combinations which optimize a weighted cost function of the fuel conversion efficiency measure and the emission measure for a range of engine output torque settings at the given engine speed are then selected. This is repeated for each given engine speed across a range of engine speeds. A feed-forward map based on the selected combinations for the entire operating range of the engine is then assembled.