2-Cycle engine of an active thermoatmosphere combustion type

Details 2-Cycle engine of an active thermoatmosphere combustion type 2-Cycle engine of an active thermoatmosphere combustion type

1978-12-18

1980-05-27

Burns, Wendell E.

Internal-combustion engines

Two-cycle

Rear compression

123 73R, 123119F, 123179G, 123179L, F02B 3304

Patent

active

042044898

ABSTRACT:
A 2-cycle engine having a scavenging passage communicating the crank case with the combustion chamber. The scavenging passage comprises a first passage and a second passage. The first passage has a long length and a small cross-sectional area for causing a fresh combustible mixture to flow at a high speed. The second passage has a short length and a large cross-sectional area for causing a fresh combustible mixture to flow at a low speed. In order to easily start the engine, a fuel pump is provided for directly feeding the fuel into the crank case in response to the operation of the choke mechanism when the engine is started.

REFERENCES:
patent: 2717584 (1955-09-01), Upton
patent: 3472211 (1969-10-01), Meininger
patent: 3690304 (1972-09-01), Schneider et al.

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