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:
May. 02, 2006
Filed:
Mar. 14, 2005
Detlef Axmacher, Iserlohn, DE;
Massimiliano Gasparro, Halver, DE;
Dirk Neubauer, Nachrodt-Wiblingwerde, DE;
Frank Pachan, Dortmund, DE;
Lars Pfützenreuter, Werdohl, DE;
Markus Wilke, Nurtingen, DE;
Detlef Axmacher, Iserlohn, DE;
Massimiliano Gasparro, Halver, DE;
Dirk Neubauer, Nachrodt-Wiblingwerde, DE;
Frank Pachan, Dortmund, DE;
Lars Pfützenreuter, Werdohl, DE;
Markus Wilke, Nurtingen, DE;
AFT Atlas Fahrzeugtechnik GmbH, Werdohl, DE;
Abstract
A control device and method for adjusting the angular velocity ratio (ω(t)/ω(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.