Two-stroke engine having several transfer channels

Details Two-stroke engine having several transfer channels Two-stroke engine having several transfer channels

1996-04-02

1999-02-16

McMahon, Marguerite

Internal-combustion engines

Two-cycle

Whirl through piston-controlled ports

123 73PP, F02B 2514

Patent

active

058709819

ABSTRACT:
A two-stroke engine for driving a crankshaft includes a cylinder defining a longitudinal elevation axis and having a top wall and a cylindrical side wall terminating in the top wall. A piston is mounted in the cylinder so as to be movable along the side wall for driving a crankshaft. The cylinder and the piston conjointly define a combustion chamber wherein combustion gases are generated during operation of the engine and the side wall of the cylinder has an exhaust window which opens into the combustion chamber for conducting away the combustion gases. The exhaust window defines a longitudinal center axis passing approximately through the elevation axis and the side wall of the cylinder has a surface portion lying opposite the exhaust window. A plurality of main channels and a plurality of support channels open into the combustion chamber for conducting fuel mixture into the combustion chamber. A first main channel and a first support channel are arranged on a first side of the center axis and a second main channel and a second support channel are arranged on a second side of the center axis. The first and second main channels have exit windows lying adjacent the exhaust window so as to cause the respective component main flows of fuel mixture to exit approximately horizontally toward the surface portion lying opposite the exhaust window. The first and second support channels have exit windows lying adjacent opposite sides of this surface portion and the support channels are so configured at the exit windows thereof to cause the component support flows to be directed upwardly along the side wall toward the top wall of the cylinder.

REFERENCES:
patent: 2681050 (1954-06-01), Schnurle
patent: 4253433 (1981-03-01), Blair
patent: 4276858 (1981-07-01), Jaulmes
patent: 4287860 (1981-09-01), Fujikawa et al.
patent: 4353333 (1982-10-01), Iio
patent: 4469054 (1984-09-01), Onishi et al.

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