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. 17, 2005
Filed:
Dec. 15, 2003
Rainer Ottersbach, Bonn, DE;
Andreas Strauss, Forchheim, DE;
Mike Kohrs, Wilthen, DE;
Jochen Auchter, Aurachtal, DE;
Rainer Ottersbach, Bonn, DE;
Andreas Strauss, Forchheim, DE;
Mike Kohrs, Wilthen, DE;
Jochen Auchter, Aurachtal, DE;
Ina Walzlager Schaeffler oHG, , DE;
Abstract
The invention concerns a control device for adjusting the relative angular position of a driven shaft, particularly a camshaft of an internal combustion engine, said device comprising a drive pinion that is rotatably connected to the shaft, an adjusting element () for the angular adjustment of the drive pinion relative to the shaft, two chambers () that are alternately supplied with hydraulic fluid and a control valve () for actuating the adjusting element (), said control valve being connected to the chambers () of the adjusting element () through pressure medium channels (). The control valve () comprises a valve body () that has two working connections A and B for the pressure medium channels (), a delivery connection P for the supply of hydraulic fluid and a discharge connection T for the discharge of hydraulic fluid, and the control valve () further comprises a sliding valve control piston () for setting different hydraulic resistances W between the individual connections. In an intermediate adjusted position of the valve control piston (), for setting an intermediate phase angle, a lower hydraulic resistance W prevails between the delivery connection P and that one of the working connections A and B at which a design-related, higher fluid leakage V occurs.