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:
Apr. 05, 2011
Filed:
Apr. 25, 2008
Applicants:
Nicole Wermuth, Ann Arbor, MI (US);
Tang-wei Kuo, Troy, MI (US);
Paul M. Najt, Bloomfield Hills, MI (US);
Inventors:
Nicole Wermuth, Ann Arbor, MI (US);
Tang-Wei Kuo, Troy, MI (US);
Paul M. Najt, Bloomfield Hills, MI (US);
Assignee:
GM Global Technology Operations LLC, Detroit, MI (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F02D 13/00 (2006.01); F02M 25/07 (2006.01);
U.S. Cl.
CPC ...
Abstract
A method for transitioning operation of a spark-ignition, direct-injection internal combustion engine having a two-step, variable phase valvetrain between HCCI and SI modes includes providing a low-lift intake valve, un-throttled stoichiometric SI operation intermediate a low-lift exhaust and intake valve HCCI mode and a high-lift exhaust and intake valve, un-throttled SI mode.