Verfahren zur Inspektion einer Zündkerze und Verfahren zur Herstellung einer Zündkerze

Details

Veröffentlichungs-Nr.

EP2733799

Aktenzeichen

EP13005430

Anmeldetag

19. November 2013

Veröffentlichung

4. September 2019

Erteilung

4. September 2019

Rechtsraum

EP

IPC

H01T13/60H01T21/06

Abstract

A method for inspecting a spark plug that includes a tubular insulator having an axial hole, a center electrode inserted into the axial hole at a front end side thereof, a tubular metallic shell disposed around the insulator, an annular space defined by an outer circumferential surface of the insulator, and an inner circumferential surface of the metallic shell and opened frontward. The method includes steps of: inspecting insulation performance of the insulator based on whether dielectric breakdown is caused in the insulator when a voltage is applied to the center electrode; photographing an area including at least the center electrode, the insulator, and the annular space from a front end side in the direction of the axis when the voltage is applied to the center electrode; and determining whether the dielectric breakdown has occurred based on the photographed image.

Anmelder

Firma

NGK Spark Plug Co., Ltd.

Land

🇯🇵 Japan

Fachgebiete