EP 1231687 A2 20020814 - Spark plug and ignition apparatus using same
Title (en)
Spark plug and ignition apparatus using same
Title (de)
Zündkerze und damit ausgestattete Zündvorrichtung
Title (fr)
Bougie d'allumage et allumage muni de celle-ci
Publication
Application
Priority
JP 2001035932 A 20010213
Abstract (en)
A power-saving type of ignition apparatus is provided with a spark plug of which electrodes (30, 40) are regulated in their shapes to lower an amount of energy required for its ignition. To face to a tip (31) of a center electrode (30) extending from a mounting bracket (10), a cylindrical protrusion (41) is built on one surface (43) of an earth electrode (40). The protrusion extends toward the center electrode to form a discharge gap (50) between the protrusion and the tip of the center electrode. Both of the tip of the center electrode and the protrusion of the earth electrode are 2.3 [mm] or less in each diameter (D1, D2), thus an amount of energy required for ignition being limited to 17 [mJ] or less.
IPC 1-7
IPC 8 full level
H01T 13/20 (2006.01); H01T 13/32 (2006.01); H01T 13/39 (2006.01)
CPC (source: EP)
H01T 13/20 (2013.01); H01T 13/32 (2013.01); H01T 13/39 (2013.01)
Citation (applicant)
Citation (third parties)
Third party :
- EP 0989646 A1 20000329 - NGK SPARK PLUG CO [JP]
- US 6147441 A 20001114 - OSAMURA HIRONORI [JP]
- JP H04209968 A 19920731 - NGK SPARK PLUG CO
- EP 1001502 A2 20000517 - NGK SPARK PLUG CO [JP]
- EP 1026394 A2 20000809 - HITACHI LTD [JP]
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
EP 1231687 A2 20020814; EP 1231687 A3 20080319; EP 1231687 B1 20121107
DOCDB simple family (application)
EP 02002968 A 20020211