EP 3267108 B1 20200506 - GLOW PLUG
Title (en)
GLOW PLUG
Title (de)
GLÜHKERZE
Title (fr)
BOUGIE DE PRÉCHAUFFAGE
Publication
Application
Priority
- JP 2016132253 A 20160704
- JP 2016208793 A 20161025
Abstract (en)
[origin: EP3267108A1] [Objective] To mitigate force transmitted from a center rod to a ceramic heater. [Means for Solution] Aglow plug includes a metallic shell, a sleeve, a ceramic heater, a center rod, and a packing. The center rod includes one or more neck portions which extend in the direction of the axial line and in which a plurality of grooves each extending on the outer circumferential surface of the center rod in the circumferential direction thereof are successively arranged in the direction of the axial line. The following relational expression is satisfied: Lb > 19.7 Da 3 × La where La is a distance between a first position and a second position in the direction of the axial line, the first position being a position of an axial center of a contact area between the packing and the outer circumferential surface of the center rod, the second position being a position of a rearmost end of a contact area between the ceramic heater and the sleeve; Lb is a distance in the direction of the axial line between the first position and a forward end of a forwardmost neck portion of the one or more neck portions; and Da is an outer diameter of the ceramic heater at the second position.
IPC 8 full level
F23Q 7/00 (2006.01)
CPC (source: EP)
F23Q 7/001 (2013.01)
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
DOCDB simple family (publication)
DOCDB simple family (application)
EP 17175520 A 20170612