F - Mech Eng,Light,Heat,Weapons – 02 – B
Patent
F - Mech Eng,Light,Heat,Weapons
02
B
123/250
F02B 27/02 (2006.01) F02B 27/06 (2006.01) F02B 61/04 (2006.01)
Patent
CA 1282292
ABSTRACT OF THE INVENTION An engine apparatus comprising an internal combustion engine having a cylinder with an exhaust port, an exhaust gas passageway system communicating with the exhaust port for providing a first compressive wave arriving at the exhaust port prior to closure thereof, and an exhaust gas side branch for providing a second compressive wave arriving at the exhaust port after the first compressive wave and prior to closure of the exhaust port, which side branch includes a valve member mounted within the side branch adjacent the entry end and selectively and alternatively movable between an open position wherein the valve member opens the entry end of the side branch, and a closed position wherein said valve member closes the entry end of the side branch. Alternating, a plug can be slideably received in the side branch for selective reciprocal movement therein relative to a position of maximum distance from the entry end of the side branch when the engine is operating at a minimum speed, to positions of successively decreasing distance from the entry end as the engine speed increases from the minimum speed to a predetermined speed, and to a position wherein the plug closes the entry end of the side branch when the engine is operating at speeds above the predetermined speed.
490998
Outboard Marine Corporation
Smart & Biggar
LandOfFree
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