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. 28, 2002
Filed:
Mar. 15, 2000
Iiya Vladimir Kolmanovsky, Ypsilanti, MI (US);
Jessy W. Grizzle, Ann Arbor, MI (US);
Jing Sun, Bloomfield, MI (US);
Ford Global Technologies, Inc., Dearborn, MI (US);
Abstract
A fuel injection method and strategy for an internal combustion engine wherein the fuel injection event that occurs during each combustion cycle of a four-cycle internal combustion engine. A first fuel injection event may occur during the intake stroke of the combustion cycle, thereby creating a lean homogeneous air/fuel mixture. A second fuel injection event may occur during the compression stroke. The combustion gases created in the combustion chamber of the engine are transferred to an exhaust system during the exhaust stroke. The injected fuel mixes with the air present in the combustion chamber to create a lean air/fuel mixture. The valve timing for the engine is deliberately adjusted to a setting that is less than the maximum torque setting where hydrocarbon production occurs during the combustion event. The exhaust gas hydrocarbon content for any given ignition spark timing increases as the injection timing before top dead center is increased.