Komatsu Zenoah Co.

Takamasa Otsuji

Hiroshi Miyazaki

The engine can improve a leading air suction efficiency, has a simple structure and a low cost. Accordingly, in a stratified scavenging two-stroke cycle engine provided with an exhaust port ( ) and a scavenging port ( ) which are connected to a cylinder chamber ( ), a leading air suction port ( ) not connected to the cylinder chamber and a crank chamber ( ), an air-fuel mixture suction port ( ) connected to the crank chamber, a scavenging flow passage ( ) connecting between the scavenging port and the crank chamber, and a piston groove ( ) connecting between the leading air suction port and the scavenging port and not connecting between the air-fuel mixture suction port and the scavenging port at a time of a suction stroke, and disposed in an outer peripheral portion of the piston ( ), the leading air suction port is positioned at an opposite side to the air-fuel mixture suction port with respect to an axis of the cylinder ( ).

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Tachikawa, Japan

Takamasa Otsuji