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1. (WO2018184801) SPARK PLUG WITH IMPROVED TIGHTNESS

Pub. No.:    WO/2018/184801    International Application No.:    PCT/EP2018/056350
Publication Date: Fri Oct 12 01:59:59 CEST 2018 International Filing Date: Thu Mar 15 00:59:59 CET 2018
IPC: H01T 13/36
Applicants: ROBERT BOSCH GMBH
Inventors: SCHIMMEL, Chris
YILMAZ, Ugur
Title: SPARK PLUG WITH IMPROVED TIGHTNESS
Abstract:
The present invention relates to a spark plug, comprising an insulator (2), a housing (3), and a sealing washer (4) which is arranged between the insulator (2) and the housing (3), wherein the sealing washer (4) is deformable, wherein the insulator (2) has an annularly circumferential shoulder (20), against which the sealing washer (4) bears, and wherein the shoulder (20) has a radius (R1) which lies in a range from 0.20 mm to 0.60 mm.