Komatsu Zenoah Co.

Kamatsu Zenoah Co.

Hiroshi Miyazaki

Toshiharu Sawada

Kazuo Nakajima

Takamasa Otsuji

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 ( ).

Stratified scavenging two-stroke cycle engine

An air cleaner for an engine is provided according to the invention. Said air cleaner comprises openings for communicating with atmosphere provided along a peripheral portion surrounding a suction chamber communicating with a suction port of a carburetor, a filter to cover said openings, a suction path formed along the inside of said openings, a partition wall provided to separate said suction path and said suction chamber, and a communicating path to provide communication between said suction path and said suction chamber so that the suction sound of the engine is prevented by said partition wall from propagating directly to atmosphere and reduced due to interference caused when passing through the long suction path which is located inside the filter, without reducing the area of the path through which suction air passes.

Growing community of inventors

Musashimurayama, Japan

Hiroshi Miyazaki