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:
Jun. 05, 2012
Filed:
Apr. 24, 2009
Applicants:
Nicole Wermuth, Ann Arbor, MI (US);
Paul M. Najt, Bloomfield Hills, MI (US);
Hanho Yun, Oakland Township, MI (US);
Inventors:
Nicole Wermuth, Ann Arbor, MI (US);
Paul M. Najt, Bloomfield Hills, MI (US);
Hanho Yun, Oakland Township, MI (US);
Assignee:
GM Global Technology Operations LLC, Detroit, MI (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F01L 1/34 (2006.01);
U.S. Cl.
CPC ...
Abstract
An internal combustion engine includes intake and exhaust camshafts including high-lift lobes and low-lift lobes separated by a lobe separation angle. The engine transitions between operating in a controlled auto-ignition combustion mode with positive valve overlap and a controlled auto-ignition combustion mode with negative valve overlap solely by selecting the corresponding one of the high-lift lobes and the low-lift lobes.