Sealing shroud port timing valve for two cycle engine

Details Sealing shroud port timing valve for two cycle engine Sealing shroud port timing valve for two cycle engine

1990-02-14

1991-02-19

Okonsky, David A.

Internal-combustion engines

Two-cycle

Whirl through piston-controlled ports

123323, F02B 7502

Patent

active

049933736

ABSTRACT:
An exhaust port timing valve for a two cycle engine has a sealing shroud preferably made as a flexible sheet that is urged by gas pressure into sealing contact with a slot and/or sealing edges of an associated exhaust port or shroud to allow low friction valve adjustment while limiting gas leakage past the valve unaffected by close tolerances and temperature changes. Springs and/or seals can alternatively be used with flexible or non-flexible shrouds to improve sealing.

REFERENCES:
patent: 4672925 (1987-06-01), Miyata et al.
patent: 4776305 (1988-10-01), Oike

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