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:
Aug. 14, 2007
Filed:
May. 26, 2005
Takeshi Etou, Chigasaki, JP;
Hatsuo Nagaishi, Zushi, JP;
Takeshi Etou, Chigasaki, JP;
Hatsuo Nagaishi, Zushi, JP;
Nissan Motor Co., Ltd., Yokohama-shi, JP;
Abstract
A determination is made as to whether or not knocking is actually occurring inside a combustion chamber (), and on the basis of the knocking detection result, a knocking-correlated parameter (octane number, alcohol concentration, compression ratio of the engine), which is a parameter having a correlation with knocking, is estimated. A knocking occurrence timing in the combustion chamber () is then predicted on the basis of the estimated knocking-correlated parameter. A knocking limit ignition timing, which is the ignition timing furthest toward the advanced side at which knocking does not occur, is calculated on the basis of the predicted knocking occurrence timing, and an ignition device () is controlled to perform spark ignition at the knocking limit ignition timing.