Patent ID: 9617876
Date: 2017-04-11
CPC Classifications: F01L,Y10T

Claim:
1. An adjustable camshaft for a valve gear of an internal combustion engine, comprising: a rotatable outer shaft defining an interior central bore there through along a longitudinal axis of said outer shaft, and defining an oil duct through a sidewall of said outer shaft; at least one first cam fixedly coupled onto said outer shaft and configured to rotate with said outer shaft; an inner shaft rotatably disposed in and extending through said interior central bore of said outer shaft, and defining a gap between said inner shaft and said outer shaft; at least a second cam disposed on said outer shaft and defining a lubrication region between said second cam and said outer shaft, said second cam configured to be rotatable with respect to said outer shaft about said longitudinal axis, said second cam further being fixedly coupled to said inner shaft and configured to rotate with said inner shaft, said inner and outer shafts being configured to permit oil to flow through said gap between said inner and outer shafts, through said oil duct in said outer shaft and into said lubrication region; and at least a first sealing element disposed between said outer shaft and said second cam and configured to provide at least a partial seal between said second cam and said outer shaft.