EP 2748904 B1 20141008 - SPARK PLUG FOR AN INTERNAL COMBUSTION ENGINE
Title (en)
SPARK PLUG FOR AN INTERNAL COMBUSTION ENGINE
Title (de)
ZÜNDKERZE FÜR EINE BRENNKRAFTMASCHINE
Title (fr)
BOUGIE D'ALLUMAGE D'UN MOTEUR A COMBUSTION INTERNE
Publication
Application
Priority
- AT 12022011 A 20110822
- AT 2012000214 W 20120817
Abstract (en)
[origin: WO2013026075A1] The invention relates to a spark plug (1) for an internal combustion engine, in particular a gas engine, comprising a middle electrode (2) and at least one earth electrode group (3a, 3b, 3c, 3d), each comprising one or more earth electrode platelets (3'), wherein the middle electrode (2) comprises at least one middle electrode platelet (2') having a middle electrode surface (4a, 4b, 4c, 4d), wherein the middle electrode surface (4a, 4b, 4c, 4d) is inclined in a range from 0° to 50°, preferably to at most 45°, to a cross-sectional plane transverse to the longitudinal axis (L) of the spark plug (1). Each earth electrode platelet (3') of an earth electrode group (3a, 3b, 3c, 3d) has an earth electrode surface (5) facing towards the middle electrode surface (4a, 4b, 4c, 4d), spaced apart from the earth electrode surface (4a, 4b, 4c, 4d) and running substantially parallel to the earth electrode surface (4a, 4b, 4c, 4d), wherein a projection of all earth electrode surfaces (5) of the earth electrode platelets (3') of an earth electrode group (3a, 3b, 3c, 3d) onto the middle electrode surface (4a, 4b, 4c, 4d) associated therewith in the direction of a normal vector (N) of the middle electrode surface (4a, 4b, 4c, 4d) produces in total a notional electrode surface (A), wherein the notional electrode surface (A) has a dimension of 8 mm2 to 25 mm2, wherein each earth electrode surface (5) of the earth electrode platelets (3') of an earth electrode group (3a, 3b, 3c, 3d) is arranged spaced apart in a range from 0.2 mm to 0.8 mm from the at least one middle electrode surface (4a, 4b, 4c, 4d).
IPC 8 full level
H01T 13/20 (2006.01); H01T 13/46 (2006.01)
CPC (source: EP US)
F02B 19/12 (2013.01 - US); H01T 13/20 (2013.01 - EP US); H01T 13/32 (2013.01 - US); H01T 13/467 (2013.01 - EP US)
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)
WO 2013026075 A1 20130228; AT 511866 A1 20130315; AT 511866 B1 20140115; CN 103748750 A 20140423; EP 2748904 A1 20140702; EP 2748904 B1 20141008; JP 2014529850 A 20141113; US 2014196684 A1 20140717
DOCDB simple family (application)
AT 2012000214 W 20120817; AT 12022011 A 20110822; CN 201280040708 A 20120817; EP 12769580 A 20120817; JP 2014526336 A 20120817; US 201414182749 A 20140218