EP 0118789 B1 19870114 - SPARKING PLUGS FOR INTERNAL-COMBUSTION ENGINES
Title (en)
SPARKING PLUGS FOR INTERNAL-COMBUSTION ENGINES
Publication
Application
Priority
DE 3308522 A 19830310
Abstract (en)
[origin: US4549114A] To increase the spark intensity delivered from a spark plug, an auxiliary spark gap (33) is serially connected with an auxiliary capacitor (37) and the main spark gap (42), the auxiliary capacitor being charged through a charging circuit including a resistor (45) connected in shunt to the auxiliary spark gap (33) and the auxiliary capacitor, and a further or second resistor (46) connected in shunt across the auxiliary capacitor and the ground or chassis electrode (15), and a shunt capacitor (51) is connected between the main spark plug terminal (27) and the ground or chassis or counter electrode (11, 15) so that, upon breakdown of the auxiliary spark gap, the main spark gap will have a voltage thereacross formed by the charge voltage of the main or shunt capacitor (51) and the additional voltage on the auxiliary capacitor (37) which had been charged through the resistors connected across the auxiliary capacitor and to the main spark plug terminal (27) and the ground terminal or electrode (15) respectively.
IPC 1-7
IPC 8 full level
H01T 13/22 (2006.01); F02P 3/08 (2006.01); F02P 9/00 (2006.01); F02P 13/00 (2006.01); H01T 13/40 (2006.01); H01T 13/46 (2006.01)
CPC (source: EP US)
F02P 3/0823 (2013.01 - EP US); F02P 9/002 (2013.01 - EP US); F02P 13/00 (2013.01 - EP US); H01T 13/40 (2013.01 - EP US); H01T 13/465 (2013.01 - EP US)
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
EP 0118789 A1 19840919; EP 0118789 B1 19870114; DE 3308522 A1 19840913; DE 3462083 D1 19870219; JP S59169088 A 19840922; US 4549114 A 19851022
DOCDB simple family (application)
EP 84101508 A 19840214; DE 3308522 A 19830310; DE 3462083 T 19840214; JP 4060884 A 19840305; US 57500784 A 19840130