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:
Dec. 01, 2009
Filed:
Jul. 03, 2008
Takahiko Inada, Chiyoda-ku, JP;
Kimihiko Tanaya, Chiyoda-ku, JP;
Koichi Okamura, Chiyoda-ku, JP;
Mitsubishi Electric Corporation, Tokyo, JP;
Abstract
An internal-combustion-engine combustion condition detection apparatus that can accurately comprehend a combustion condition is obtained. The internal-combustion-engine combustion condition detection apparatus includes an ion-current detection device () that detects an ion current generated during combustion and ignition devices including a first ignition device () having a first ignition plug () that causes main combustion in a combustion chamber () and a second ignition device () having a second ignition plug () disposed in the same combustion chamber () as and spaced apart from the first ignition plug () of the first ignition device (); the ion-current detection device () detects a combustion ion current that is generated in the second ignition device () regardless of whether or not ignition is performed by the second ignition device (), thereby detecting pre-ignition or a precursor phenomenon of pre-ignition.