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. 03, 2015
Filed:
Oct. 03, 2011
Yuhei Matsushima, Chiyoda-ku, JP;
Hideki Hagari, Chiyoda-ku, JP;
Toshikatsu Saito, Chiyoda-ku, JP;
Keitaro Ezumi, Aki-gun, JP;
Tomokuni Kusunoki, Aki-gun, JP;
Yuhei Matsushima, Chiyoda-ku, JP;
Hideki Hagari, Chiyoda-ku, JP;
Toshikatsu Saito, Chiyoda-ku, JP;
Keitaro Ezumi, Aki-gun, JP;
Tomokuni Kusunoki, Aki-gun, JP;
Mitsubishi Electric Corporation, Tokyo, JP;
Mazda Motor Corporation, Hiroshima, JP;
Abstract
A knock control apparatus for internal combustion engine includes: a knock signal normalization unit that normalizes a knock signal extracted from an output signal of a knock sensor; a knock determination threshold setting unit that sets a knock determination threshold on the basis of the normalized knock signal; a knock intensity computation unit that calculates knock intensity on the basis of the normalized knock signal and the set knock determination threshold; a knock determination unit that determines a presence or absence of a knock on the basis of the calculated knock intensity; and a knock correction amount computation unit that calculates a knock correction amount to correct the calculated knock intensity in a case where an occurrence of a knock is determined. The knock signal normalization unit normalizes a standard deviation of the knock signal by dividing the knock signal by an average value of the knock signal.