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:
May. 22, 2001
Filed:
Feb. 01, 2000
Kimihiko Tanaya, Tokyo, JP;
Yasuhiro Takahashi, Tokyo, JP;
Yasuyoshi Hatazawa, Tokyo, JP;
Mitsuru Koiwa, Tokyo, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
A knock control device for an internal combustion engine includes means,for calculating a knock level signal N on the basis of an ionic current, means,for arithmetically estimating a maximum noise level MN on the basis of a variation in the knock level signal, means,for obtaining a noise peak value PA on the basis of the maximum noise level, means,A for calculating a background level BGLA on the basis of the noise peak value, means,for judging the knock on the basis of the background level, and means,for arithmetically operating the controlled variable on the basis of the knock judgement result.