Patent ID: 7513232

Claim:
An adjustable camshaft, for an internal combustion engine for a motor vehicle, wherein two shafts, namely one inner shaft and one outer shaft ( 2 , 1 ), each fixedly connected to the cams, are rotatable in relation to one another, to create a relative movement, a hydraulic adjusting device ( 5 ) is provided at one of its ends, in the adjusting device ( 5 ) oppositely rotatable adjusting elements ( 6 , 7 ) are each fixedly connected to one of the two shafts ( 1 , 2 ), and the outer shaft ( 1 ) is adjacent to the adjusting device ( 5 ), with a bearing ring ( 3 ) supporting the shafts ( 1 , 2 ) in a stationary abutment ( 4 ), and is fixedly connected to the bearing ring, comprising the features at least one of the adjusting elements ( 6 , 7 ) of the adjusting device ( 5 ) fixedly connected to the two shafts ( 1 , 2 ) is at least partially in tight contact at the end with a connecting face ( 8 ) which is formed by the bearing ring ( 3 ) of the outer shaft ( 1 ) with respect to the two shafts ( 1 , 2 ) including the bearing ring ( 3 ), the connecting face ( 8 ) has passages running axially through it between the hydraulic chambers of the adjusting device ( 5 ) and the hydraulic fluid feed channels ( 9 , 10 , 11 , 12 ), the feed channels ( 9 , 10 , 11 , 12 ) lead through the shafts and/or between the shafts ( 1 , 2 ) and/or through ring gaps ( 10 IV , 11 IV ) formed between the outer shaft ( 1 ) and the bearing ring ( 3 ) from the connecting face ( 8 ) to the filling areas in the circumferential surface of the bearing ring ( 3 ), the filling areas open into peripheral ring channels ( 9 ″, 10 ″, 11 ″, 12 ″) each allocated to the filling areas of a feed channel ( 9 , 10 , 11 , 12 ).