EP 1188023 B1 20040623 - ELECTRICALLY HEATABLE GLOW PLUG OR GLOW ROD FOR COMBUSTION ENGINES
Title (en)
ELECTRICALLY HEATABLE GLOW PLUG OR GLOW ROD FOR COMBUSTION ENGINES
Title (de)
ELEKTRISCH BEHEIZBARE GLÜHKERZE ODER GLÜHSTAB FÜR VERBRENNUNGSMOTOREN
Title (fr)
BOUGIE DE PRECHAUFFAGE, POUVANT ETRE CHAUFFEE ELECTRIQUEMENT, OU CRAYON DE PRECHAUFFAGE POUR MOTEURS A COMBUSTION INTERNE
Publication
Application
Priority
- DE 19928037 A 19990618
- EP 0004521 W 20000519
Abstract (en)
[origin: DE19928037C1] The invention relates to an electrically heatable glow plug or glow rod for internal combustion engines. Said plug has a corrosion-resistant glow tube that is closed on the end thereof, in which a filling material consisting of electrically non-conductive compacted powder is contained and in which an electrically conductive spiral is embedded. In order to improve the service life of the heating spiral in said glow plug or the glow rod, the electrically conductive spiral is hardened, especially nitride hardened by means of diffusion treatment, at least in part of the longitudinal extension thereof, preferably in the surface area of the heating spiral. This makes it possible for the spiral to withstand mechanical strains without any degradation during the compression process.
IPC 1-7
IPC 8 full level
F23Q 7/00 (2006.01); H05B 3/12 (2006.01); H05B 3/18 (2006.01); H05B 3/48 (2006.01)
CPC (source: EP)
F23Q 7/001 (2013.01)
Designated contracting state (EPC)
FR GB IT
DOCDB simple family (publication)
DE 19928037 C1 20000525; EP 1188023 A1 20020320; EP 1188023 B1 20040623; JP 2003502613 A 20030121; JP 3618092 B2 20050209; WO 0079185 A1 20001228
DOCDB simple family (application)
DE 19928037 A 19990618; EP 0004521 W 20000519; EP 00925294 A 20000519; JP 2001505506 A 20000519