Rotary exhaust valve for two-stroke engine

Details Rotary exhaust valve for two-stroke engine Rotary exhaust valve for two-stroke engine

1990-08-22

1993-12-07

Cross, E. Rollins

Internal-combustion engines

Two-cycle

Whirl through piston-controlled ports

1231903, F01L 712

Patent

active

052675351

ABSTRACT:
A two-stroke engine with a rotary exhaust valve being provided in the vicinity of the exhaust part of the engine; the rotary exhaust valve rotates in a contrary direction to the rotating direction of the engine crank and at a speed equal to one-half that of the crank. During final exhaust stage, the exhaust passage is closed so as to prevent the fresh fuel gas from being exhausted before being burned.

REFERENCES:
patent: 4570439 (1986-02-01), Uchinishi
patent: 4848279 (1989-07-01), Luo
patent: 4924819 (1990-05-01), Boyesen
patent: 4969329 (1990-11-01), Bolton et al.

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