SPLIT RING GEAR PLANETARY CAM PHASER
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United States of America Patent
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Issued Date -
Nov 5, 2015
app pub date -
Nov 21, 2013
filing date -
Dec 10, 2012
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Abstract
A cam phaser (10) for dynamically adjusting a rotational relationship of a camshaft (24) of an internal combustion engine with respect to an engine crank shaft can include a planetary gear system (12) having a split ring gear (18) including a drive-side ring gear (18a) to be driven by the engine crank shaft through an endless loop power transmission member and an output-side ring gear (18b) connectable for rotation with the camshaft (24). A sun gear (14) can be located concentric with the split ring gear (18), and a number of planetary gears (16a,16b, 16c) can be in meshing engagement between the sun gear (14) and the split ring gear (18). The output-side ring gear (18b) can have a different number of teeth (greater or lesser) than compared with the drive-side ring gear (18a) by a value corresponding to a multiple of the number of planetary gears to provide tooth alignment at an engagement position of each of the planetary gears (16a, 16b, 16c).
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