Two-cycle engine

Details Two-cycle engine Two-cycle engine

1998-03-31

2000-03-28

Kamen, Noah P.

Internal-combustion engines

Two-cycle

Rear compression

123 65P, F02B 3304

Patent

active

060417455

ABSTRACT:
To provide a compact two-cylinder engine in which adjacent cylinders are located close to each other. In the two-cycle engine of the present invention, the scavenging passages of scavenging ports adjacent to the exhaust ports are flat or elongate in their cross section and extend to the sides of the exhaust ports. This structure allows the cross-sectional area of the scavenging passages to be sufficient, but allows the width of the cylinder section between adjacent cylinders to be decreased. Furthermore, in the two-cycle engine of the present invention, the exhaust passages of the cylinders are arranged in the direction substantially orthogonal with the direction of alignment of the cylinders, and the exhaust control valves are positioned near the exhaust ports in order to control an opening amount of the exhaust ports. The exhaust control valves are rotatably supported by a pivot extending substantially in parallel with the juxtaposed direction of the cylinders, and are turned in a plane which is parallel with the opening direction of the exhaust ports.

REFERENCES:
patent: 2114582 (1938-04-01), Venediger
patent: 2271015 (1942-01-01), Jackson
patent: 4638770 (1987-01-01), Fox
patent: 4886021 (1989-12-01), Seeber et al.

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