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:
Aug. 28, 2007
Filed:
Oct. 06, 2005
Marco Schmitt, Fulda, DE;
Marco Schmitt, Fulda, DE;
Schaeffler KG, Herzogenaurach, DE;
Abstract
The invention relates to a device () for altering the control times of gas exchange valves of an internal combustion engine, having a hydraulic actuating device () and a control valve (). The device () according to the invention is provided with centre-position locking of a hydraulic actuating device (). Furthermore, the device () according to the invention ensures that if an actuating unit () which governs the control valve () fails, the hydraulic actuating device () is locked in the central position and the locking is maintained until the actuating unit () is repaired. Furthermore, the device () according to the invention allows the internal combustion engine to be started in a locked position in a central position without a moveable element () of the hydraulic actuating device () striking a side wall of a pressure space () when the internal combustion engine is started.