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:
Mar. 01, 2011
Filed:
Mar. 20, 2009
Yuichi Yamada, Aichi, JP;
Daisuke Nakano, Aichi, JP;
Toru Nakamura, Aichi, JP;
Yoshikuni Sato, Aichi, JP;
Yuichi Yamada, Aichi, JP;
Daisuke Nakano, Aichi, JP;
Toru Nakamura, Aichi, JP;
Yoshikuni Sato, Aichi, JP;
NGK Spark Plug Co., Ltd., Aichi, JP;
Abstract
An ignition device for a plasma jet ignition plug is provided. A resistance for decreasing electric noises is not incorporated in a plasma jet ignition plug. A resistance of not less than 1KΩ and not more than 20KΩ is provided to a path from a spark discharge circuit to a center electrode, thus reducing the generation of electric noises at the time of trigger discharge. Along with the reduction of the generation of electric noises, a loss of energy at the time of plasma discharge can be reduced by setting an inner resistance provided to a line extending to the center electrode from a plasma discharge circuit to 1Ω or less. Accordingly, the plasma jet ignition plug can jet flame-shaped plasma sufficiently large for igniting an air-fuel mixture.