CONCENTRIC DUAL INDEPENDENT CAMSHAFT PHASER FOR DUAL OVERHEAD CAMSHAFT VALVE TRAIN
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United States of America Patent
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N/A
Issued Date -
Feb 4, 2016
app pub date -
Jul 31, 2014
filing date -
Jul 31, 2014
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A variable valve timing system and methods of operation are provided. A primary valve train driver is configured to rotate about a primary axis. A primary camshaft includes a first plurality of cams positioned on the primary camshaft. The primary camshaft is coaxially coupled to the primary valve train driver. The first plurality of cams is configured to rotate about the primary axis. A primary camshaft phaser is coaxially coupled to the primary camshaft. The primary camshaft phaser is rotatably coupled to the primary valve train driver so as to rotate the primary camshaft phaser and the primary camshaft to a first phase angle. A secondary camshaft driver on the primary axis is coaxially coupled to the primary camshaft, and a secondary camshaft phaser is coaxially coupled to the primary camshaft and coupled to the secondary camshaft driver on the primary axis. The secondary camshaft phaser is rotatably coupled to the primary valve train driver so as to rotate the secondary camshaft driver on the primary axis to a second phase angle.
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