EP 0081479 B1 19870121 - SPARK PLUG
Title (en)
SPARK PLUG
Publication
Application
Priority
AU 8100073 W 19810616
Abstract (en)
[origin: WO8204504A1] A spark plug adapted, in use, for association with an axial passage (38, 38', 54). The spark plug includes an insulator member (21) having an electrode (23, 23') disposed centrally thereof and projecting outwardly from one end thereof; and an electrode member (28, 47) at said one end of said insulator member surrounding and spaced from said centrally disposed electrode. The electrode member is so shaped to define, with the insulator member a pre-combustion chamber (30) surrounding the centrally disposed electrode. The electrode member has an aperture (29, 49) to receive the extreme end of said centrally disposed electrode of said insulator member. The electrode member further includes a plurality of additional separate apertures (31, 50) adjacent the central aperture (29, 49), and which allow for fluid communication between the pre-combustion chamber (30) and the associated axial passage (38, 38', 54). In one embodiment the axial passage is a straight passage (38') provided in an adaptor member in which the spark plug is received. In other embodiments the axial passage is a venturi passage (38) provided in a similar adaptor member, or a venturi passage (54) provided in the spark plug port of an associated engine.
IPC 1-7
IPC 8 full level
H01T 13/32 (2006.01); H01T 13/54 (2006.01)
CPC (source: EP)
H01T 13/32 (2013.01); H01T 13/54 (2013.01)
Designated contracting state (EPC)
DE FR GB SE
DOCDB simple family (publication)
WO 8204504 A1 19821223; DE 3175871 D1 19870226; EP 0081479 A1 19830622; EP 0081479 A4 19831026; EP 0081479 B1 19870121; JP S58500962 A 19830609
DOCDB simple family (application)
AU 8100073 W 19810616; DE 3175871 T 19810616; EP 81901517 A 19810616; JP 50190681 A 19810616