EP 0438097 A1 19910724 - Glow plug for diesel engines particularly of motor vehicles, with a tubular sheath having a diameter reduction at the closed end.
Title (en)
Glow plug for diesel engines particularly of motor vehicles, with a tubular sheath having a diameter reduction at the closed end.
Title (de)
Glühstiftkerze für Dieselmotoren, insbesondere für Kraftfahrzeuge mit reduziertem Durchmesser des geschlossenen Glührohrendes.
Title (fr)
Bougie à incandescence pour moteurs diesel, en particulier pour véhicules automobiles comportant une gaine avec une réduction de diamètre de l'extrémité fermée.
Publication
Application
Priority
IT 1907190 A 19900116
Abstract (en)
The glow plug includes a tubular metal sheath (G) having in conjuction with the closed end a conical swaging (G3) made up by means of a conical compaction of the same sheath for getting in the swaged zone, extended in a part of the ogive (K3), an increase of the sheath thickness and then an increase of the resistance to the thermochemical corrosion during the motor preheating and running phase. The conical compaction also allows to get an increase of the consistency of the insulating powder going towards the tip of the swaged sheath part (G3). Advantages: It is got a greather reliability of the glow plug, a temperature uniformity in tip and a better configuration of the sheath closed end. Therefore an increase of the glow plug duration and a better combustion of the air-gas oil mixture are obtained. The invention is shown in Figure 3. <IMAGE>
IPC 1-7
IPC 8 full level
CPC (source: EP)
F23Q 7/001 (2013.01); F02B 3/06 (2013.01)
Citation (search report)
- [A] GB 2058216 A 19810408 - BOSCH GMBH ROBERT
- [A] GB 986947 A 19650324 - GEN ELECTRIC
- [A] US 4112577 A 19780912 - MANN GAMDUR S
- [A] PATENT ABSTRACTS OF JAPAN vol. 11, no. 67 (M-566)(2514) 28 February 1987, & JP-A-61 225517 (NGK SPARK PLUG CO) 07 October 1986,
Designated contracting state (EPC)
BE DE ES FR GB IT SE
DOCDB simple family (publication)
EP 0438097 A1 19910724; EP 0438097 B1 19940323; DE 69101447 D1 19940428; DE 69101447 T2 19940714; ES 2050459 T3 19940516; IT 1240312 B 19931207; IT 9019071 A0 19900116; IT 9019071 A1 19910717
DOCDB simple family (application)
EP 91100365 A 19910114; DE 69101447 T 19910114; ES 91100365 T 19910114; IT 1907190 A 19900116