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. 05, 2016
Filed:
Aug. 18, 2011
Applicants:
Kohei Katsuraya, Aichi, JP;
Tatsunori Yamada, Aichi, JP;
Katsutoshi Nakayama, Aichi, JP;
Inventors:
Assignee:
NGK Spark Plug Co., Ltd., Aichi, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01T 13/40 (2006.01); F02P 9/00 (2006.01); F02P 3/00 (2006.01); F02P 23/04 (2006.01);
U.S. Cl.
CPC ...
H01T 13/40 (2013.01); F02P 3/00 (2013.01); F02P 9/007 (2013.01); F02P 23/04 (2013.01); F02P 23/045 (2013.01);
Abstract
A technique of improving the life of a spark plug which generates spark discharge and AC plasma. A plasma ignition device includes a power control section which reduces AC power P after generation of AC plasma in an AC power supply period Sa during which the AC power P is continuously supplied to a spark plug within a maintainable power range Rp within which the AC plasma can be maintained.