2-cycle engine of an active thermosphere combustion type

Details 2-cycle engine of an active thermosphere combustion type 2-cycle engine of an active thermosphere combustion type

F - Mech Eng,Light,Heat,Weapons

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F02B 75/02 (2006.01) F02B 33/04 (2006.01) F02B 33/30 (2006.01) F02B 33/44 (2006.01)

Patent

CA 1089767

A 2-CYCLE ENGINE OF AN ACTIVE THERMOATMOSPHERE COMBUSTION TYPE ABSTRACT OF THE DISCLOSURE A 2-cycle engine having a transfer passage communi- cating 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.

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