Zündkerze

Details

Veröffentlichungs-Nr.

EP4811570

Anmeldetag

5. Februar 2026

Veröffentlichung

23. September 2026

Rechtsraum

EP

Abstract

A spark plug (10) includes an insulator (11) extending along an axial line (X), a center electrode (13) held within the insulator (11), a metal shell (15) placed on the insulator (11), and a ground electrode (16, 30) including an end portion (17) located on a distal side relative to the center electrode (13), the ground electrode (16,30) being connected to the metal shell (15). The ground electrode (16,30) includes a parent material (18), a first core material (19) provided inside the parent material (18), and a second core material (20) provided inside the first core material (19) and being made of a different material from the first core material (19). The end portion (17) includes a melt-formed portion (21) in which the parent material (18) is melted and that contains precious metal, and a discharge surface (22) forming a surface of the melt-formed portion (21) and facing the center electrode (13) in a direction of the axial line (X). The melt-formed portion (21) is in contact with the first core material (19) and the second core material (20).

Anmelder

Firma

Niterra Co., Ltd.

Land

🇯🇵 Japan