EP 0147613 A2 19850710 - Sparking plug for an internal-combustion engine.
Title (en)
Sparking plug for an internal-combustion engine.
Title (de)
Zündkerze für eine Brennkraftmaschine.
Title (fr)
Bougie d'allumage pour un moteur à combustion interne.
Publication
Application
Priority
DE 3347027 A 19831224
Abstract (en)
[origin: US4613789A] A spark plug which has a capacitor located therein, connected in parallel to the main or ignition spark gap (13), additional includes a pilot or pre-spark gap (12) located within the insulator (18) of the spark gap, to control discharge of the capacitor (14) through the main spark gap (13). In accordance with the invention, the pre-spark gap (12) is located within a chamber (34) in the insulator which is filled with a pressurized gas, preferably nitrogen under pressure of between 2 to 100 bar, preferably 5 to 30 bar, with the electrodes (27, 27) defining the pre-spark gap being spaced, preferably, between about 0.1 to 1 mm from each other. Placing the pre-spark gap electrodes within a pressurized gas chamber increases the energy available at the main spark gap (13) for ignition even of very lean fuel-air mixtures. Preferably, an inductive-resistive circuit (15) is connected in shunt across the main electrode (13) to prevent arcing and glow discharges across the main spark gap (13) after the initial ignition spark.
Abstract (de)
Es wird eine Zündkerze für eine Brennkraftmaschine vorgeschlagen, die durch bauliche Vereinigung von einer in den Brennraum der Brennkraftmaschine ragenden Zündfunkenstrecke (13) von einem über die Zündfunkenstrecke (13) entladbaren Kondensator (14), von einer die Kondensatorspannung überwachenden Vorfunkenstrecke (12), von einem elektrischen Isolator (18) und von einem die Einzelteile zusammenhaltenden Metallgehäuse (19) gebildet wird. Hierbei ist erfindungsgemäß die Vorfunkenstrecke (12) bei geringem Elektrodenabstand in einem unter hohem Gasdruck stehenden Hohlraum untergebracht, wodurch an dieser Funkenstrecke (12) der Energieverlust vermindert wird.
IPC 1-7
IPC 8 full level
F02P 3/08 (2006.01); F02P 9/00 (2006.01); F02P 13/00 (2006.01); H01T 13/22 (2006.01); H01T 13/46 (2006.01); F02B 1/04 (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 13/465 (2013.01 - EP US); F02B 1/04 (2013.01 - EP US)
Designated contracting state (EPC)
DE FR GB IT
DOCDB simple family (publication)
EP 0147613 A2 19850710; EP 0147613 A3 19850807; DE 3347027 A1 19850704; JP S60157182 A 19850817; US 4613789 A 19860923
DOCDB simple family (application)
EP 84113964 A 19841119; DE 3347027 A 19831224; JP 26761284 A 19841220; US 67155584 A 19841115