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, 2010
Filed:
Nov. 02, 2007
Don R. Sutherland, Romeo, MI (US);
Tang-wei Kuo, Troy, MI (US);
Barry L. Brown, Lake Orion, MI (US);
Don R. Sutherland, Romeo, MI (US);
Tang-Wei Kuo, Troy, MI (US);
Barry L. Brown, Lake Orion, MI (US);
GM Global Technology Operations, Inc., Detroit, MI (US);
Abstract
A method for extending the low-load operation of a homogeneous charge compression ignition engine includes employing a valve actuation device creating a negative valve overlap, thereby trapping and recompressing combusted gases within a combustion chamber, the device effecting increasingly longer negative valve overlap as engine load decreases, injecting during the negative valve overlap a fraction of fuel into the recompressed combusted gases, and igniting the fuel with a heat source during the negative valve overlap.