Glühkerze

Details

Veröffentlichungs-Nr.

EP3018414

Aktenzeichen

EP15191142

Anmeldetag

23. Oktober 2015

Veröffentlichung

8. Mai 2019

Erteilung

8. Mai 2019

Rechtsraum

EP

IPC

F23Q7/00F23Q7/22

Abstract

[Object] An object of the present invention is to provide a glow plug that undergoes a smaller decrease in life despite the high-temperature employed during afterglow, with which short-circuiting of the glow plug and deterioration of the resistive heating element are suppressed during afterglow that involves using the glow plug in such a manner that the internal temperature around the resistive heating element reaches 1200°C or higher. [Solving Means] A glow plug includes a heater that includes a tubular sheath having a distal end that is closed, a resistive heating element disposed in the tubular sheath, and insulating powder disposed around the resistive heating element in the tubular sheath. The resistive heating element is formed of an alloy containing aluminum. The insulating powder contains MgO and at least one oxide selected from the group consisting of CrO 3 , Cr 2 O 3 , SnO, FeO, Fe 3 O 4 , MnO, MnO 2 , Mn 2 O 3 , Mn 3 O 4 , SiO 2 , WO 2 , TiO 2 , Ti 2 O 3 , and ZrO 2 . "A" representing an amount of aluminum contained in the resistive heating element in terms of mass percent and "S" representing an amount of the oxide contained in the insulating powder in terms of mass percent on an oxide basis satisfy 0.04 ‰¤ S/A ‰¤ 0.31.

Anmelder

Firma

NGK Spark Plug Co., Ltd.

Land

🇯🇵 Japan

Fachgebiete