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. 17, 2012
Filed:
Aug. 10, 2010
Futoshi Aida, Chiyoda-ku, JP;
Hiroshi Okuda, Chiyoda-ku, JP;
Yuichi Muramoto, Chiyoda-ku, JP;
Yusuke Naruse, Chiyoda-ku, JP;
Futoshi Aida, Chiyoda-ku, JP;
Hiroshi Okuda, Chiyoda-ku, JP;
Yuichi Muramoto, Chiyoda-ku, JP;
Yusuke Naruse, Chiyoda-ku, JP;
Mitsubishi Electronic Corporation, Tokyo, JP;
Abstract
A plasma power supply circuit includes a DC/DC converter connected to a DC power supply and outputting a DC voltage, a voltage limit circuit limiting an output voltage from the DC/DC converter to a predetermined value, a PJ capacitor connected to an output end of the DC/DC converter and charged with electric energy used to generate a plasma in a discharge space of the spark plug, and a high-voltage switch connected between the PJ capacitor and the DC/DC converter and controlled to switch ON and OFF so that a charge period of the PJ capacitor is controlled according to running conditions of the internal combustion engine. Hence, the plasma ignition device can prevent damage on an electronic component incorporated therein even at the occurrence of a short and lessen damage on the internal combustion engine caused by an erroneous plasma jet ejection, wearing of the spark plug, and power consumption.