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:
Feb. 20, 2007
Filed:
May. 25, 2004
Erwin Bauer, Regensburg, DE;
Dietmar Ellmer, Regensburg, DE;
Achim Koch, Tergernheim, DE;
Thorsten Lauer, Regensburg, DE;
Erwin Bauer, Regensburg, DE;
Dietmar Ellmer, Regensburg, DE;
Achim Koch, Tergernheim, DE;
Thorsten Lauer, Regensburg, DE;
Siemens Aktiengesellschaft, Munich, DE;
Abstract
The invention relates to a device for electrohydraulic valve lift switching with a hydraulically activatable actuating element for bringing about valve lift switching, which is connected to an oil line, whereby the action of pressurized oil on the actuating element can be controlled by an on/off valve arranged in the oil line and connected to a control device. The invention has an oil pressure metering device arranged in the oil line, which is connected to the control device, and a device for detecting the time period between activation of the on/off valve by the control device and a characteristic change in the measured oil pressure.