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. 10, 2005
Filed:
May. 23, 2002
Udo Diehl, Stuttgart, DE;
Bernd Rosenau, Tamm, DE;
Uwe Hammer, Hemmingen, DE;
Volker Beuche, Stuttgart, DE;
Peter Lang, Weissach, DE;
Stefan Reimer, Markgroeningen, DE;
Udo Diehl, Stuttgart, 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
An apparatus for controlling gas exchange valves of an internal combustion engine having hydraulic valve actuators each assigned to one gas exchange valve, with one adjusting piston acting on the gas exchange valve and two hydraulic work chambers defined by the adjusting piston the first work chamber acting on the gas exchange valve in the closing direction being constantly filled with fluid that is under pressure, and the second work chamber acting on the gas exchange valve in the opening direction can be filled with and relieved of fluid that is under pressure in alternation via a first and second electrical control valve. Two valve actuators are each triggered in alternation by the same first and the same second control valve, and the switchover of the control valves is performed during the closing state of the two gas exchange valves actuated by these valve actuators.