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. 04, 2008
Filed:
Oct. 03, 2006
James A. Eng, Troy, MI (US);
William R. Leppard, Colorado Spring, CO (US);
Paul M. Najt, Bloomfield Hills, MI (US);
Tang-wei Kuo, Troy, MI (US);
James A. Eng, Troy, MI (US);
William R. Leppard, Colorado Spring, CO (US);
Paul M. Najt, Bloomfield Hills, MI (US);
Tang-Wei Kuo, Troy, MI (US);
GM Global Technology Operations, Inc., Detroit, MI (US);
Abstract
Operation of a homogeneous charge compression ignition engine is adapted to fuel variations. A variable valve actuating system is employed to effect conditions conducive to homogeneous charge compression ignition operation. Nominal valve timing is selected and adjustments thereto are made based on deviations in combustion phasing from a desired combustion phasing. Fuel delivery timing and quantity are adjusted once valve timing authority limits are reached to achieve further combustion phasing improvement.