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, 123 73PP, 123 73SP, F02B 3304

Patent

active

042044880

ABSTRACT:
A 2-cycle engine having a transfer passage communicating the crank case with the combustion chamber. The transfer 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. The second passage is connected to the crank room via the bypass passage. A normally closed valve is arranged in the bypass passage. The valve is opened when the engine is operating under a heavy load.

REFERENCES:
patent: 2058526 (1936-10-01), Tanner

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