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:
Feb. 23, 1993
Filed:
Jan. 24, 1992
Koji Sakakibara, Hekinan, JP;
Koichi Kamabora, Tokoname, JP;
Nippondenso Co., Ltd., Kariya, JP;
Abstract
A knocking control system for an internal combustion engine which is capable of surely detecting and reducing the knock of the engine. The knocking control system is equipped with a logarithmic conversion section for performing the logarithmic conversion of the effective knock intensity of the output signals of a knock sensor and a central value detecting section for detecting a central value in the logarithmic conversion value distribution. The deviation between the central value and the logarithmic conversion value is averaged to obtain an average value corresponding to the standard deviation of the logarithmic conversion value, thereby producing a knock decision level on the basis of the average value. The knock decision level is compared with the logarithmic conversion value so that the occurence of the knock is determined in accordance with the comparison result and the ignition timing of the engine is controlled in accordance with the determination result so as to reduce the knocking state.