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. 15, 2006
Filed:
Dec. 20, 2004
Jens Schäfer, Herzogenaurach, DE;
Martin Steigerwald, Erlangen, DE;
Jonathan Heywood, Pettstadt, DE;
Jens Schäfer, Herzogenaurach, DE;
Martin Steigerwald, Erlangen, DE;
Jonathan Heywood, Pettstadt, DE;
INA-Schaeffler KG, Herzogenaurach, DE;
Abstract
An electrical adjusting device for changing an angle of rotation of a camshaft () relative to a crankshaft of an internal-combustion engine is provided. The device includes an adjusting gear unit (), which is formed as a triple-shaft gear unit, including an input part () that is fixed to the crankshaft, an output part () that is fixed to the camshaft, and an adjusting shaft (), which is connected in a torsion-proof manner to an electric adjusting motor () having a permanent magnet rotor and a stator () fixed to the housing. A stationary gear ratio (i), the value of which defines the adjusting gear unit () as a positive or negative gear unit and deter-mines whether a direction of adjustment of the camshaft () is into an advanced or retarded base position, is located between the input part () and the output part () when the adjusting shaft is at rest. Due to the configuration of the adjusting gear unit (), stationary gear ratios are provided, through which an advanced and a retarded base position of the camshaft () can be reached exclusively through braking of the adjusting shaft () when the adjusting gear unit () is rotating, and the braking of the adjusting shaft () is carried out through short-circuit braking of the adjusting motor ().