Drive arrangement for a camshaft fitted in the cylinder head of an internal combustion engine

Claim 1

A drive arrangement for a camshaft (3) mounted in the cylinder head (1) of an internal combustion engine with a facility for rotating the camshaft relative to a drive wheel (5) coaxially in driving connection with the crankshaft of the internal combustion engine, which facility has a switching component (6), which can be shifted axially between two end positions by a servo motor (13) and interacts over a first gear-tooth system (7, 9) with the drive wheel 5 and over a second gear-tooth system (8, 11) with the camshaft (3), each gear-tooth system comprising an external tooth system (7 and 8), which is provided at the switching component (6), and an internal tooth system (9 and 11), which is provided in the hub (10) of the drive wheel (5) and in the camshaft (3), and the two gear-tooth systems enclosing different angles with the longitudinal center line of the camshaft, characterized in that the servo motor (13) is disposed adjacent to the end of the camshaft (3) averted from the drive wheel (5) and that the control element (16) of the servo motor (13) is connected with the switching component (6) by a switching rod (17), which is put through the camshaft (3).