Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
SPARK PLUG
Document Type and Number:
WIPO Patent Application WO/2019/138801
Kind Code:
A1
Abstract:
A spark plug (10) is provided with a grounding electrode (14) curved so as to face a tip surface (15a) of a center electrode (13), and a prescribed plane (P) along the curved grounding electrode faces the direction of flow of a gas. On a main body of the grounding electrode: a first inclined surface (21) is formed in a part on the side upstream of the center electrode with respect to the gas flow on the side facing the tip surface, said first inclined surface coming close to the tip surface from the upstream side to the downstream side of the gas flow; a facing part (25) is provided in a position facing the tip surface at the shortest distance from the tip surface; and a second inclined surface (22) is formed in a part on the upstream side of the center electrode with respect to the gas flow on a side opposite to the side facing the tip surface, said second inclined surface being separate from the tip surface from the upstream side to the downstream side of the gas flow. Letting T be the thickness of the main body of the grounding electrode as relates to the insertion direction of the center electrode and Su be the distance to the facing part from the connecting part (31) of the first inclined surface and the second inclined surface, 2T/16 ≤ Su ≤ 8T/16.

Inventors:
SHIMAMOTO, Daisuke (1-1 Showa-cho, Kariya-cit, Aichi 61, 〒4488661, JP)
ABE, Yuya (1-1 Showa-cho, Kariya-cit, Aichi 61, 〒4488661, JP)
SHIBATA, Masamichi (1-1 Showa-cho, Kariya-cit, Aichi 61, 〒4488661, JP)
Application Number:
JP2018/046534
Publication Date:
July 18, 2019
Filing Date:
December 18, 2018
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
DENSO CORPORATION (1-1 Showa-cho, Kariya-city Aichi, 61, 〒4488661, JP)
International Classes:
H01T13/32
Domestic Patent References:
WO2009066714A12009-05-28
WO2012114661A12012-08-30
Foreign References:
JP2016184558A2016-10-20
JP2014192100A2014-10-06
JP2017174681A2017-09-28
JP2007134319A2007-05-31
JP2017147086A2017-08-24
JP2017079171A2017-04-27
JP2007242588A2007-09-20
JP2016152103A2016-08-22
Attorney, Agent or Firm:
YAMADA, Tsuyoshi (Daiichi Hasegawa Bldg.6F, 13-24 Meieki 3-chome, Nakamura-ku, Nagoya-sh, Aichi 02, 〒4500002, JP)
Download PDF: