Two-stroke engine having variable exhaust port timing

Internal-combustion engines – Two-cycle – Whirl through piston-controlled ports

Patent

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Details

Other Related Categories

123323, 123 73R, 123190D, 123 65V, 123 65A, F02B 7502, F02D 906

Type

Patent

Status

active

Patent number

043218938

Description

ABSTRACT:
Two stroke engine having variable exhaust timing, which includes an exhaust timing control member disposed in the exhaust passage in the vicinity of the exhaust port. The control member is of an arcuately curved contour having diameter gradually decreasing from one end toward the other end so that it can readily be assembled in the cylinder simply by inserting from one side of the cylinder. The control member has a longitudinal axis which is inclined with respect to a line perpendicular to a line passing through the center axis of the cylinder and the center of the exhaust port so that the smaller diameter end is closer to the center axis of the cylinder than the large diameter end for making it possible to locate the arcuately curved contour of the control member substantially along the cylinder wall.

REFERENCES:
patent: 4121552 (1978-10-01), Mithuo et al.
patent: 4202297 (1980-05-01), Oku et al.
patent: 4285311 (1981-08-01), Iio

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