| US 7,513,232 B2 | ||
| Adjustable camshaft, in particular for internal combustion engines for motor vehicles having a hydraulic adjusting device | ||
| Falk Schneider, Korntal-Münchingen (Germany) | ||
| Assigned to Mahle International GmbH, Stuttgart (Germany) | ||
| Appl. No. 11/629,436 PCT Filed Jan. 13, 2006, PCT No. PCT/DE2006/000039 § 371(c)(1), (2), (4) Date Dec. 13, 2006, PCT Pub. No. WO2006/081789, PCT Pub. Date Aug. 10, 2006. |
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| Claims priority of application No. 10 2005 005 212 (DE), filed on Feb. 03, 2005; and application No. 10 2005 040 934 (DE), filed on Aug. 30, 2005. | ||
| Prior Publication US 2007/0240657 A1, Oct. 18, 2007 | ||
| Int. Cl. F01L 1/34 (2006.01) | ||
| U.S. Cl. 123—90.17 [123/90.15; 123/90.6; 464/160] | 4 Claims |
| 1. 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 (10IV, 11IV) 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).
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