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:
Jan. 08, 2002
Filed:
Feb. 01, 2000
Shu Sasaki, Tokyo, JP;
Koichi Okamura, Tokyo, JP;
Yasuyoshi Hatazawa, Tokyo, JP;
Mitsuru Koiwa, Tokyo, JP;
Hisanori Nobe, Tokyo, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
To provide a combustion condition detecting apparatus for an internal combustion engine, which may well detect the combustion conditions such as discrimination of a combustion cylinder and knock generating condition and may reduce a circuit scale therefor, there are provided an ignition coil provided for each cylinder; an ignition plug for discharging by the application of the ignition high tension voltage to ignite mixture within the cylinder; a bias circuit provided for each cylinder for applying a bias voltage to the ignition plug ; an ionic current detection circuit provided for each cylinder for detecting as an ionic current detection signal an ionic current generated in the cylinder that is immediately after the combustion of the mixture; a knock signal processing circuit provided one for a combination of a plurality of cylinders that are every two or more cylinders in ignition order on the basis of a sum of the ionic current detection signals; and an ECU for detecting the combustion condition of the ignition plug on the basis of the knock signal.