Hydraulic camshaft phaser and valve for operation thereof
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United States of America Patent
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May 29, 2018
Issued Date -
N/A
app pub date -
Jul 14, 2016
filing date -
Jul 14, 2016
priority date (Note) -
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Abstract
A camshaft phaser includes an input member and an output member defining an advance chamber and a retard chamber; a valve body having a valve bore which extends along an axis, an annular groove extending radially outward from the valve bore and having a first width in the direction of the axis, and a passage which opens into the annular groove and which extends from the valve bore through the valve body radially outward from the valve bore such that the passage has a second width in the direction of the axis that is greater than the first width of the annular groove. The camshaft phaser also includes a valve spool which moves along the axis within said valve bore, the valve spool having a land which varies a flow area between the valve bore and the annular groove and between the valve bore and the passage.
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