Verfahren zur Herstellung einer Zündkerze

Details

Veröffentlichungs-Nr.

EP2733800

Aktenzeichen

EP13193515

Anmeldetag

19. November 2013

Veröffentlichung

19. August 2020

Erteilung

19. August 2020

Rechtsraum

EP

IPC

H01T13/60H01T21/06

Abstract

[Object] To provide a technology such that a decision about dielectric breakdown of an insulator can be made accurately. [Solution] A method for manufacturing a spark plug includes: a preparation step of preparing a specimen provided with a center electrode, an insulator, a metal shell, and a ground electrode; and an inspection step of applying a predetermined voltage between the ground electrode and the center electrode of the prepared specimen, and determining whether dielectric breakdown is caused in the insulator. The inspection step includes a calculation step of receiving an oscillating wave generated from the specimen upon application of the predetermined voltage to the specimen, obtaining a power spectrum by subjecting an oscillating wave signal representing the oscillating wave to fast Fourier transform, and then calculating an integral of a predetermined frequency range in the power spectrum, and a judgment step of judging whether discharge is caused by dielectric breakdown of the insulator by utilizing the integral.

Anmelder

Firma

NGK Spark Plug Co., Ltd.

Land

🇯🇵 Japan

Fachgebiete