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Details

Veröffentlichungs-Nr.

EP2717397

Aktenzeichen

EP13187319

Anmeldetag

4. Oktober 2013

Veröffentlichung

3. August 2022

Erteilung

3. August 2022

Rechtsraum

EP

IPC

H01T13/39

Abstract

In a spark plug, at least either of a center electrode and a ground electrode has a tip which defines a gap, a tip provided on at least either of a center electrode and a ground electrode contains Ir, Rh and Ru in a total amount of 95 mass % or more with respect to the whole mass amount thereof, and the contents (Rh, Ru) of Rh and Ru (mass %) lie within an area which is surrounded by a line which connects point A (6, 1), point B (6, 15), point C (33, 18), point D (33, 4) and the point A (6, 1) in this order or lie on the line. The tip satisfies 1.5 ¤ Has/Han ¤ 2.2.

Anmelder

Firma

NGK Spark Plug Co., Ltd.

Land

🇯🇵 Japan

Fachgebiete