Bi-directional control groove design for engine rotation reversal on engine with sliding camshaft
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United States of America Patent
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Dec 22, 2015
Grant Date -
Aug 20, 2015
app pub date -
Jun 20, 2014
filing date -
Feb 14, 2014
priority date (Note) -
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Abstract
A camshaft assembly includes a camshaft rotatable about a cam axis, and a lobe pack slideably attached to the camshaft. The lobe pack includes a barrel cam that defines a control groove disposed annularly about the cam axis. When the camshaft and the lobe pack rotate about the cam axis in a first rotational direction, the control groove is shaped to react against either a first or second shifting pin, to guide the lobe pack along a first or third path respectively, into a first or second axial position respectively. When the camshaft and the lobe pack rotate about the cam axis in a second rotational direction, the control groove is shaped to react against the first and second shifting pins to guide the lobe pack along a second path, into the second axial position.
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