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:
Apr. 08, 2014
Filed:
Sep. 07, 2011
Hideki Hagari, Chiyoda-ku, JP;
Yuhei Matsushima, Chiyoda-ku, JP;
Keitaro Ezumi, Aki-gun, JP;
Tomokuni Kusunoki, Aki-gun, JP;
Hideki Hagari, Chiyoda-ku, JP;
Yuhei Matsushima, 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 correction amount computation portion computes, on the basis of intensity of a knock in a case where the presence of an occurrence of the knock is determined, a knock correction amount by which to move a spark timing of the internal combustion engine to be on a retard side and returns the knock correction amount to be back on an advance side in a case where the absence of an occurrence of a knock is determined. In a case where a value of the knock correction amount to be on the retard side becomes equal to or exceeds a predetermined value, the knock correction amount computation portion limits and holds the knock correction amount at the predetermined value and returns the limited knock correction amount to be back on the advance side in a case where the absence of an occurrence of a knock is determined.