Air intake porting for a two stroke engine
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United States of America Patent
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Aug 25, 2009
Grant Date -
Jan 17, 2008
app pub date -
Jul 17, 2007
filing date -
Mar 3, 2006
priority date (Note) -
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Abstract
A two stroke engine of a particular configuration can have its power output increased by running bigger pistons and using ports in the piston skirt through which to conduct compressed air within the skirt through short passages in the cylinder housing that conduct the air from within the skirt to above the piston. As a result a larger piston can be used for the same spacing and opening size in the block to save the need to redesign the block and the crankshaft. A position adjuster for the piston moves it axially without rotation of the piston ports out of alignment with inlet ports in the housing. The piston rod is held in the crosshead using a flat to prevent rotation while an adjuster nut that is turned creates axial movement in the piston rod with a lock nut securing the final piston position.
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