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:
Jul. 19, 2005
Filed:
Nov. 28, 2002
Udo Diehl, Stuttgart, DE;
Bernd Rosenau, Tamm, DE;
Simon Kieser, Sachsenheim, DE;
Uwe Hammer, Hemmingen, DE;
Volker Beuche, Stuttgart, DE;
Stefan Reimer, Markgroeningen, DE;
Peter Lang, Weisach, DE;
Udo Diehl, Stuttgart, DE;
Bernd Rosenau, Tamm, DE;
Simon Kieser, Sachsenheim, DE;
Uwe Hammer, Hemmingen, DE;
Volker Beuche, Stuttgart, DE;
Stefan Reimer, Markgroeningen, DE;
Peter Lang, Weisach, DE;
Robert Bosch GmbH, Stuttgart, DE;
Abstract
A device for controlling an opening cross section in the combustion cylinder of an internal combustion engine is provided, the device having a gas exchange valve integrated into the combustion cylinder and having an actuator which drives the valve element to execute a closing stroke and an opening stroke. A valve brake which is active during a residual closing stroke of the valve element is provided for the purpose of reducing the impact velocity of the valve closure member of the valve element on the valve seat in the closing stroke of the valve element. The valve brake has a hydraulic damping element with a fluid displacement volume which flows out through a throttle cross section of a throttle opening, and a control unit for controlling the throttle cross section as a function of the viscosity of the displacement volume.