Ignition apparatus for internal combustion engines

Patent · Tue Apr 21 04:00:00 EDT 1987

OSTI ID:6811606

Kashima, O; Shibata, M

This patent describes an ignition apparatus for an internal combustion engine comprising: at least a first electrode assembly and a second electrode assembly each thereof including an electrode and mounted on a cylinder head of an internal combustion engine; and at least one ignition coil having a primary winding and a secondary winding; each of the electrodes of the first and second electrode assemblies being electrically connected to one end of the secondary winding of the ignition coil; each of the electrodes of the first and second electrode assemblies being supported on the cylinder head of the engine electrically insulated therefrom; whereby a spark gap for producing spark discharge is formed between the electrodes of the first and second electrode assemblies, and a high tension circuit connecting the secondary winding of the ignition coil respectively to the electrodes of the first and second electrode assemblies is totally electrically insulated from any body of the engine; and the apparatus further comprising a spark plug which incorporates the first and second electrode assemblies and includes an electrical insulator for holding the electrode of the first electrode assembly and a mounting metallic shell fixed onto an outer surface of the electrical insulator, wherein the electrode of the second electrode assembly constitutes a side electrode which is attached to the mounting metallic shell to oppose the electrode of the first electrode assembly, thereby forming a spark gap therebetween, and wherein the mounting metallic shell of the spark plug is fitted onto the cylinder head of the engine being electrically insulated therefrom.

• Assignee: Nippondenso Co., Ltd., Kariya
• Patent Number(s): US 4658774
• OSTI ID: 6811606
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
330101* -- Internal Combustion Engines-- Spark-Ignition
CYLINDERS
ELECTRIC COILS
ELECTRIC DISCHARGES
ELECTRICAL EQUIPMENT
ELECTRICAL INSULATION
ELECTRICAL INSULATORS
ELECTRODES
ELEMENTS
ENGINES
EQUIPMENT
HEAT ENGINES
IGNITION SYSTEMS
INTERNAL COMBUSTION ENGINES
METALS
SPARK IGNITION ENGINES
VEHICLES