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:
Dec. 16, 2003
Filed:
Jan. 06, 2003
Applicant:
Inventors:
Thompson Milton Sloane, Oxford, MI (US);
Ping-Ho Tsai, Troy, MI (US);
Assignee:
General Motors Corporation, Detroit, MI (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F02D 7/00 ;
U.S. Cl.
CPC ...
F02D 7/00 ;
Abstract
A method for operating a homogeneous-charge-compression-ignition (HCCI) engine at low speed includes the steps of monitoring the operating speed and load of the HCCI engine in a stable combustion condition. When the engine cylinder load drops below a predetermined value equal to the lowest allowed load at its current engine speed, at least one cylinder is deactivated to maintain the stable combustion in the remaining activated cylinders. When the cylinder load exceeds another predetermined value at its current engine operating speed, the cylinder is reactivated.