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:
Oct. 31, 2006
Filed:
Feb. 23, 2005
Tang-wei Kuo, Troy, MI (US);
Paul M. Najt, Bloomfield Hills, MI (US);
James A. Eng, Troy, MI (US);
Junseok Chang, Ann Arbor, MI (US);
Zoran S. Filipi, Ann Arbor, MI (US);
Dionissios N. Assanis, Ann Arbor, MI (US);
Orgun A. Guralp, Ann Arbor, MI (US);
Tang-Wei Kuo, Troy, MI (US);
Paul M. Najt, Bloomfield Hills, MI (US);
James A. Eng, Troy, MI (US);
Junseok Chang, Ann Arbor, MI (US);
Zoran S. Filipi, Ann Arbor, MI (US);
Dionissios N. Assanis, Ann Arbor, MI (US);
Orgun A. Guralp, Ann Arbor, MI (US);
General Motors Corporation, Detroit, MI (US);
University of Michigan, Ann Arbor, MI (US);
Abstract
A method is disclosed for expanding the mid load range of a four-stroke gasoline direct-injection controlled auto-ignition combustion engine. The engine includes at least one cylinder containing a piston reciprocably connected with a crank and defining a variable volume combustion chamber including an intake valve controlling communication with an air intake and an exhaust valve controlling communication with an exhaust outlet. A system is employed for variably actuating the intake and exhaust valves. The valve actuating system is employable to operate the intake and exhaust valves with an exhaust re-compression or an exhaust re-breathing valve strategy. A reservoir chamber in communication with the combustion chamber is provided for temporary holding of residual burned gas. Residual burned gas in the combustion chamber and the exhaust outlet enters into the reservoir chamber and then loses thermal energy while in the reservoir chamber before being drawn back into the combustion chamber.