To sufficiently mix fuel with air in an internal combustion engine provided with an ignitor.
The one cycle of the internal combustion engine is set to six strokes comprising the stroke of jetting fuel to the inside of a cylinder while sucking air into the cylinder from a suction passage according to the downward movement of a piston 14, the stroke of compressing the inside of the cylinder according to the upward movement of the piston, the stroke of thrusting the piston 14 from a upper dead center by the pressurization of the cylinder according to the compression, the step of igniting the air-fuel mixture near the upper dead center while compressing the inside of the cylinder according to the upward movement of the piston 14, the stroke of depressing the piston 14 by the expansion of the high temperature gas according to the combustion, and the stroke of extruding the fuel gas expanded to an exhaust passage according to the upward movement of the piston 14.
Yoshio Matsuda
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