Exhaust timing control apparatus

Details Exhaust timing control apparatus Exhaust timing control apparatus

1987-08-13

1989-02-28

Myhre, Charles J.

Internal-combustion engines

Two-cycle

Whirl through piston-controlled ports

123323, F02B 7502

Patent

active

048075710

ABSTRACT:
An exhaust timing control apparatus for two-cycle engines of the type having one or more exhaust ports extending outwardly from the cylinder. A valve body is pivotally mounted within the exhaust passage in a recess specifically provided therefore. The valve has a control surface approaching the cylinder to define an apparent upper timing edge of the exhaust port. Holes are provided through the valve body for flow to operate to inhibit the build up of carbon deposits which often inhibit the operation of the valve. An inclined surface may be formed on the surface of the valve body to facilitate the removal of carbon. Edges may also be provided on the valve body which cooperate with the walls of the recess in the exhaust passage to knock off carbon build up such that it might be conveyed through the exhaust pipe and from the system.

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patent: 4622928 (1986-11-01), Uchinishi
patent: 4672925 (1987-06-01), Miyata et al.

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