Internal-combustion engines – Poppet valve operating mechanism – Camshaft drive means
Reexamination Certificate
2006-05-02
2006-05-02
Denion, Thomas (Department: 3748)
Internal-combustion engines
Poppet valve operating mechanism
Camshaft drive means
C123S090150, C123S090170
Reexamination Certificate
active
07036474
ABSTRACT:
A control device and method for adjusting the angular velocity ratio (ωN(t)/ωK(t)) between a camshaft and a crankshaft is provided. Various control devices and methods for rotating the camshaft relative to the crankshaft provide a drive which may advance and retard the camshaft in comparison to the crankshaft. Previous systems have the disadvantage that either two drives in different directions are necessary for each actuation direction or the drive must have right-handed rotation and left-handed rotation. In the control device and the method according to the invention, the advancing of the camshaft is achieved by a drive in the running direction of the camshaft and the retarding is achieved by a braking device. It has been shown to be especially advantageous if an electric motor in two quadrant mode is used as the drive, which may then also be used as the braking device. Such a control device and method are required for setting the control times in internal combustion engines.
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Taubitz, DE 19804942 (Translation).
Axmacher Detlef
Gasparro Massimiliano
Neubauer Dirk
Pachan Frank
Pfützenreuter Lars
AFT Atlas Fahrzeugtechnik GmbH
Denion Thomas
Eshete Zelalem
Volpe and Koenig P.C.
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