Adjusting device for a camshaft

Internal-combustion engines – Poppet valve operating mechanism – With means for varying timing

Reexamination Certificate

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Details

C123S090170, C123S090310

Reexamination Certificate

active

07341029

ABSTRACT:
An adjusting device for the rotational position of the camshaft of a reciprocating piston engine relative to the crankshaft has a variator which is designed as a three-shaft transmission having a fixed-to-the-crankshaft input shaft, a fixed-to-the-camshaft output shaft, and an adjusting shaft. The adjusting shaft is coupled nonrotatably to the rotor of a servomotor. To limit the torsional angle between the camshaft and the crankshaft, the adjusting device has limit stops. The servomotor is connected to a control circuit which is designed for controlling the phase velocity of the torsional angle.

REFERENCES:
patent: 6138622 (2000-10-01), Heer
patent: 6499452 (2002-12-01), Ma
patent: 6712307 (2004-03-01), Iwase et al.
patent: 6820579 (2004-11-01), Kawamura et al.
patent: 2002/0100446 (2002-08-01), Watanabe
patent: 2003/0226532 (2003-12-01), Takenake et al.
patent: 2004/0107928 (2004-06-01), Asada et al.
patent: 11/153008 (1999-06-01), None
patent: 2004-156461 (2004-06-01), None

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