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. 20, 2009
Filed:
Jul. 02, 2008
Toshihiko Tanaka, Kariya, JP;
Toshihiko Tanaka, Kariya, JP;
Denso Corporation, Kariya, JP;
Abstract
If improper fuel (light oil or kerosene) is mixed into fuel (gasoline) supplied to the engine, a knock limit of an ignition timing is retarded. Based on such a characteristic, every when knocking is detected based on a detection signal from a knock sensor, the ignition timing is stored as the knock occurring ignition timing and the ignition timing is retarded by a predetermined amount. After repeating the above processes, it is determined whether the knock occurring ignition timing is retarded more than a determination value (for example, a retarded limit value of the knock occurring ignition timing in a case that proper gasoline is served). When the knock occurring ignition timing is retarded more than the determination value, it is determined that the improper fuel is mixed in the fuel.