Variable valve operating apparatus for internal combustion engine
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United States of America Patent
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Feb 17, 2015
Grant Date -
Sep 6, 2012
app pub date -
Nov 25, 2009
filing date -
Nov 25, 2009
priority date (Note) -
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Abstract
A variable valve operating apparatus for an internal combustion engine is provided which includes a helical wall part provided in a guide rail for changing valve opening characteristics of a valve and a projection part, and can secure a contact area between the two when the two are engaged, thus successfully reducing the contact pressure generated between the two. The placement of the projection part with respect to the helical wall part is determined such that the central axis line of the projection part and the central axis line of a camshaft perpendicularly intersect with each other in a state in which the projection part is protruded toward the guide rail by an actuator.
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