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:
Dec. 27, 2005
Filed:
Jan. 31, 2003
Udo Diehl, Stuttggart, DE;
Bernd Rosenau, Tamm, DE;
Uwe Hammer, Hemmingen, DE;
Volker Beuche, Stuttgart, DE;
Peter Lang, Weissach, DE;
Stefan Reimer, Markgroeningen, DE;
Udo Diehl, Stuttggart, DE;
Bernd Rosenau, Tamm, DE;
Uwe Hammer, Hemmingen, DE;
Volker Beuche, Stuttgart, DE;
Peter Lang, Weissach, DE;
Stefan Reimer, Markgroeningen, DE;
Robert Bosch GmbH, Stuttgart, DE;
Abstract
A hydraulically controlled actuator for actuation of an exhaust-side gas exchange valve of an internal combustion engine, containing a control piston that is displaceable within a cylinder and, with piston sides facing away from one another, delimits pressure chambers, of which the one pressure chamber impinges upon the gas exchange valve in the closing direction and the other pressure chamber impinges upon the gas exchange valve in the opening direction. In the actuator is provided at least one spring element, which can be brought into a preloaded state by the control piston moving in the closing direction of the gas exchange valve, and whose stored potential energy accelerates the gas exchange valve in the opening direction at least at the beginning of an opening phase, is provided. This results in a reduction in the energy expended in the context of valve actuation.