Spark ignition device and internal combustion engine with the same
AssigneeHitachi, Ltd.
InventorsYoshihiro Sukegawa, Noboru Tokuyasu, Yusuke Kihara
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Abstract
A plurality of spark electrodes are disposed in an arc shape on the surface or so as to be projected from the surface of an insulating member formed on a part of the wall face of a combustion chamber, and are formed so as to be in series electrically via discharging gaps. A spark plug is provided integrally with an injector, and the spark plug and the ignition coil are integrated. The three members are constructed as an integral unit, thereby improving installability to an engine.
Claims15
A spark ignition device of an internal combustion engine, comprising a spark plug having a plurality of spark electrodes connected between an ignition coil and the earth, said spark plug being attached to a cylinder head of the internal combustion engine for igniting a mixture of air and fuel supplied from a fuel injection valve in a cylinder,
- wherein a nozzle orifice of said fuel injection valve is provided at a center of said spark plug,
- wherein said plurality of spark electrodes and discharging gaps thereof are disposed together in an annularly shaped, arc shaped, or polygonally shaped layout on one end of said spark plug so that said spark electrodes are electrically arranged in series through the discharging gaps, and
- wherein said spark electrodes are disposed around said nozzle orifice so that said nozzle orifice is located at a center of said annularly shaped, arc shaped, or polygonally shaped layout and said discharging gaps.
A spark ignition device of an internal combustion engine, comprising an injector for directly injecting fuel into a cylinder, and a plurality of spark electrodes connected between an ignition coil and the earth, wherein a layer made of an insulating material is provided around one end of a nozzle of said injector, at least a discharge surface of each of said plurality of spark electrodes is exposed from the insulating layer, said spark electrodes are disposed in an annular shape, an arc shape, or a polygonal shape at intervals of discharging gaps in said insulating layer so as to be electrically arranged in series through the discharging gaps.
Dependencies are inferred from the claim text.