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:
Sep. 27, 2011
Filed:
Aug. 13, 2010
Futoshi Aida, Chiyoda-ku, JP;
Hiroshi Okuda, Chiyoda-ku, JP;
Yusuke Naruse, Chiyoda-ku, JP;
Mitsubishi Electric Corporation, Tokyo, JP;
Abstract
To provide a plasma ignition system that can prevent damage on an internal combustion engine due to erroneous ejection of a plasma jet, and further, even when the required voltage of an ignition plug becomes lower, can prevent erroneous ignition by the charged voltage of a PJ capacitor. A plasma power supply circuit of the plasma ignition system includes a voltage-limiting circuit having a first set voltage having an absolute value lower relative to the discharge voltage of the ignition coil, and a second set voltage having an absolute value higher relative to the discharge voltage of the ignition coil, and the first set voltage and the second set voltage are selectively switched according to an operation condition of the internal combustion engine.