EP 0635856 A1 19950125 - Ignition coil.
Title (en)
Ignition coil.
Title (de)
Zündspule.
Title (fr)
Bobine d'allumage.
Publication
Application
Priority
JP 14793693 A 19930618
Abstract (en)
Disclosed is an ignition coil which is most small in size without degrading performance under low primary current. The ignition coil includes an iron core (1) forming a closed magnetic circuit through an air gap (2), a primary winding (6) wound around the iron core (1) for magnetizing the iron core (1) and a permanent magnet (4) magnetized in an opposite direction to a magnetizing direction by the primary winding current. A cross-sectional area (SG) of the iron core (1) at which the permanent magnet (4) is inserted is made substantially equal to that (SM) of the permanent magnet (4). In order for the permanent magnet (4) to bias by 2/3 of the magnetic flux saturation point of the iron core (1), the permanent magnet (4) is so shaped that its thickness (LM) satisfies 0.6 mm<LM<1.8 mm and its cross-sectional area (SM) and the cross-sectional area (SF) of winding portion of the iron core (1) satisfies 1.3<SM/SF<3.0. <IMAGE>
IPC 1-7
IPC 8 full level
F02P 15/00 (2006.01); H01F 38/12 (2006.01)
CPC (source: EP KR)
F02P 1/00 (2013.01 - KR); H01F 38/12 (2013.01 - EP)
Citation (search report)
- [DXA] EP 0352453 A1 19900131 - NIPPON DENSO CO [JP]
- [A] DE 656392 C 19380204 - MAGNETOS R B SOC D
- [A] FR 2464543 A1 19810306 - BBC BROWN BOVERI & CIE [DE]
- [A] EP 0043744 A1 19820113 - DUCELLIER & CIE [FR]
- [A] EP 0431322 A1 19910612 - NIPPON DENSO CO [JP]
- [A] DE 1464202 A1 19690522 - LICENTIA GMBH
Designated contracting state (EPC)
DE FR GB IT
DOCDB simple family (publication)
EP 0635856 A1 19950125; EP 0635856 B1 20000913; DE 69425853 D1 20001019; DE 69425853 T2 20010315; JP 3391049 B2 20030331; JP H0722256 A 19950124; KR 100242545 B1 20000302; KR 950001091 A 19950103
DOCDB simple family (application)
EP 94109288 A 19940616; DE 69425853 T 19940616; JP 14793693 A 19930618; KR 19940013472 A 19940615