The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 04, 2009
Filed:
Jun. 22, 2007
Lorenzo Giovanardi, Florence, DE;
Matthias Gregor, Stuttgart, DE;
Jens Meintschel, Esslingen, DE;
Reinhard Orthmann, Leonberg, DE;
Bernd-heinrich Schmitfranz, Esslingen, DE;
Markus Stalitza, Schwäbisch Gmünd, DE;
Lorenzo Giovanardi, Florence, DE;
Matthias Gregor, Stuttgart, DE;
Jens Meintschel, Esslingen, DE;
Reinhard Orthmann, Leonberg, DE;
Bernd-Heinrich Schmitfranz, Esslingen, DE;
Markus Stalitza, Schwäbisch Gmünd, DE;
Daimler AG, Stuttgart, DE;
Abstract
In a method and device for adjusting an electro-dynamic brake of an electric camshaft adjuster for a phase angle adjustment of a camshaft of an internal combustion engine with respect to the crankshaft thereof, the phase angle is controlled by means of a position controller and the adjustment speed of the phase angle of the camshaft with respect to the crankshaft is controlled by means of an adjustment speed controller by controlling the current through the electro-dynamic brake by means of a further adjustment device and the use of Pilot controls to improve the control behavior of the cascade controller.