EP 2869413 B1 20191204 - Method of manufacturing spark plug
Title (en)
Method of manufacturing spark plug
Title (de)
Verfahren zur Herstellung einer Zündkerze
Title (fr)
Procédé de fabrication d'une bougie d'allumage
Publication
Application
Priority
JP 2013228834 A 20131101
Abstract (en)
[origin: EP2869413A1] To improve the accuracy of a judgment as to whether or not a discharge penetrating an insulator has occurred. A spark plug which includes a center electrode extending in an axial direction, an insulator having an axial hole which extends in the axial direction and in which the center electrode is disposed, a metallic shell disposed around the insulator, and a ground electrode electrically connected to the metallic shell and forming a gap in cooperation with the center electrode is manufactured by the following method. An assembly is formed by combining the metallic shell, the insulator, and the center electrode. A voltage is applied between the metallic shell and the center electrode of the assembly. In a period during which the voltage is applied, a judgment as to whether or not a discharge penetrating the insulator has occurred is made by using an output value output from an optical sensor directed toward a forward end portion of the assembly.
IPC 8 full level
H01T 13/60 (2011.01); H01T 21/02 (2006.01)
CPC (source: EP)
H01T 13/60 (2013.01); H01T 21/02 (2013.01)
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
DOCDB simple family (publication)
EP 2869413 A1 20150506; EP 2869413 B1 20191204; JP 2015088436 A 20150507; JP 5921516 B2 20160524
DOCDB simple family (application)
EP 14189873 A 20141022; JP 2013228834 A 20131101