EP 3900128 A1 20211027 - SPARK PLUG COMPRISING A ROUNDED INSULATOR BASE PORTION
Title (en)
SPARK PLUG COMPRISING A ROUNDED INSULATOR BASE PORTION
Title (de)
ZÜNDKERZE MIT VERRUNDETEM ISOLATORFUß-ABSCHNITT
Title (fr)
BOUGIE D'ALLUMAGE À PARTIE BEC D'ISOLANT ARRONDIE
Publication
Application
Priority
- DE 102018222460 A 20181220
- EP 2019084395 W 20191210
Abstract (en)
[origin: WO2020126663A1] The invention relates to a spark plug comprising a housing (2), an insulator (3), a centre electrode (4), and a ground electrode (7) located at a combustion-chamber end of the housing. The insulator has an insulator collar (32), an insulator base (34), and a transition region (33) which lies on a shoulder (22) of the housing. A breathing space (50) is formed at the combustion-chamber end of the spark plug and is delimited by a portion (24) of the interior of the housing and a portion (348) of the insulator base. The portion of the insulator base has a (rounded portion 345) having a first side length (L1) and a second side length (L2 < L1) angled with respect to the first side length, wherein the first side length extends between the point at which the side lengths intersect and a first end point (346) of the rounded portion and the second side length extends between the point of intersection and a second end point (347) of the rounded portion. The rounded portion can also be used with a prechamber spark plug.
IPC 8 full level
H01T 13/20 (2006.01); H01T 13/36 (2006.01)
CPC (source: EP US)
H01T 13/20 (2013.01 - EP); H01T 13/32 (2013.01 - US); H01T 13/36 (2013.01 - EP US); H01T 13/54 (2013.01 - US)
Citation (search report)
See references of WO 2020126663A1
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
Designated extension state (EPC)
BA ME
DOCDB simple family (publication)
WO 2020126663 A1 20200625; CN 113169524 A 20210723; CN 113169524 B 20220610; DE 102018222460 A1 20200625; EP 3900128 A1 20211027; JP 2022512133 A 20220202; JP 7231739 B2 20230301; US 11394178 B2 20220719; US 2022085578 A1 20220317
DOCDB simple family (application)
EP 2019084395 W 20191210; CN 201980084371 A 20191210; DE 102018222460 A 20181220; EP 19824245 A 20191210; JP 2021532210 A 20191210; US 201917309674 A 20191210