Zündkerze

Details

Veröffentlichungs-Nr.

EP2894735

Aktenzeichen

EP15150659

Anmeldetag

9. Januar 2015

Veröffentlichung

27. Februar 2019

Erteilung

27. Februar 2019

Rechtsraum

EP

IPC

H01T13/20H01T13/32H01T13/16

Abstract

Objective: To improve ignitability and wear resistance of a spark plug. Means for Solution: In a particular cross section including a center axis of the center electrode tip, when two directions that are orthogonal to a center axis of the center electrode tip and opposed to each other are denoted as a first direction and a second direction, an outer diameter of a first face that is a gap forming face of the center electrode tip is denoted as R1, an outer diameter of a second face that is a gap forming face of the ground electrode tip is denoted as R2, a length of the gap is denoted as G1, and an average distance of a distance between an end in the first direction of the first face and an end in the first direction of the second face and a distance between an end in the second direction of the first face and an end in the second direction of the second face is denoted as G2, R1 < R2, 0.5 mm ¤ G1 ¤ 1.1 mm, 0.7 mm ¤ G2 ¤ 1.2 mm, 0.6 mm ¤ G1 ¤ 1.3 mm, and 1.4 ¤ (R2/R1) x (G2/G1) ¤ 1.8 are satisfied.

Anmelder

Firma

NGK Spark Plug Co., Ltd.

Land

🇯🇵 Japan

Fachgebiete