Ignition coil assembly for internal combustion engines

Patent · Tue Apr 21 00:00:00 EDT 1987

OSTI ID:6546680

Kusaka, Y; Yoshinari, T; Watanabe, H

An ignition coil assembly is described for an internal combustion engine having coil units each of which includes a primary coil supplied with a primary current from a battery and a secondary coil magnetically coupled with the primary coil. Both ends are connected to respective spark plugs, center cores around which the respective coil units are provided. A side core magnetically linked with the center cores forms closed magnetic paths for the magnetic fluxes produced by the respective primary coils. Switching means for controlling the primary currents supply the respective primary coils in response to ignition signals furnished by an ignition control unit. Each of the center cores is a laminated core formed of grain oriented silicon steel plates and so placed within a coil unit that an axis of easy magnetization of the center core coincides with the direction of the magnetic flux produced by the primary coil of the coil unit. The side core is a laminated core made of non-grain oriented silicon steel plates as one body and linked magnetically with each of the center cores with an air gap in a part of the magnetic path formed by each of the center cores and the side core. Each of the primary coils, when it is supplied with a primary current, produces the magnetic flux which is in the same direction in the center core as those produced by any other primary coils.

• Assignee: Hitachi, Ltd.
• Patent Number(s): US 4658799
• OSTI ID: 6546680
• Resource Relation: Patent File Date: Filed date 17 Mar 1986
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
SPARK IGNITION ENGINES
IGNITION SYSTEMS
ELECTRIC BATTERIES
ELECTRIC COILS
ELECTRIC CURRENTS
GRAIN ORIENTATION
MAGNETIC FLUX
MAGNETIZATION
CRYSTAL STRUCTURE
CURRENTS
ELECTRICAL EQUIPMENT
ELECTROCHEMICAL CELLS
ENGINES
EQUIPMENT
HEAT ENGINES
INTERNAL COMBUSTION ENGINES
MICROSTRUCTURE
ORIENTATION
330101* - Internal Combustion Engines- Spark-Ignition