Title:
SPARK PLUG AND PLASMA GENERATING DEVICE
Document Type and Number:
WIPO Patent Application WO/2015/016337
Kind Code:
A1
Abstract:
Provided is a spark plug with which it is possible to prevent fusion loss of the central electrode tip and reduce power loss, even if the spark plug is constituted to supply discharge current and electromagnetic waves from the terminal mounting part of the spark plug. Also provided is a plasma generating device using said spark plug. The spark plug comprises: a central electrode having a terminal mounting part (2A) and an electrode body (2B) which is electrically connected to this terminal mounting part (2A); insulating porcelain (3) having an axial hole (30) in which the central electrode (2) is fitted; a main fitting part (4) which surrounds the periphery of the insulating porcelain (3); and an earthed electrode (5) which is formed so as to extend from the end surface of this main fitting part (4) , and which forms a discharge gap in which spark discharge occurs in the space between the earthed electrode (5) and the electrode body (2B) of the central electrode (2). The electrode body (2B) comprises a tip electrode (25) equipped with an electrode tip (25a) for generating a spark discharge between the tip and the earthed electrode (5); a cylindrical tip inductive tube (24) which covers the electrode tip part (25a); and a cylindrical connecting conductive tube (23) which connects the tip inductive tube (24) and the terminal mounting part (2A).
Inventors:
IKEDA YUJI (JP)
MAKITA MINORU (JP)
MAKITA MINORU (JP)
Application Number:
PCT/JP2014/070307
Publication Date:
February 05, 2015
Filing Date:
August 01, 2014
Export Citation:
Assignee:
IMAGINEERING INC (JP)
International Classes:
H01T13/20; F02P13/00; H01T13/34; H01T13/44; H01T15/00
Domestic Patent References:
| WO2011016569A1 | 2011-02-10 |
Foreign References:
| JP2012127286A | 2012-07-05 | |||
| JP2007113570A | 2007-05-10 | |||
| JP2009036198A | 2009-02-19 |
Other References:
See also references of EP 3029784A4
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