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:
Jun. 17, 2008
Filed:
Oct. 05, 2005
Marco Schmitt, Fulda, DE;
Jochen Auchter, Weisendorf, DE;
Marco Schmitt, Fulda, DE;
Jochen Auchter, Weisendorf, DE;
Ina-Schaeffler JG, Herzogenaurach, DE;
Abstract
The invention relates to a device () for varying the control times of gas exchange valves of an internal combustion engine, with a hydraulic actuation device () and with a control valve (). The device () according to the invention is provided with mid-position locking of a hydraulic actuation device (). Furthermore, the device () according to the invention ensures that, in the event of the failure of an actuation unit () which regulates the control valve (), the hydraulic actuation device () is locked in the mid-position and the lock is maintained until the actuation unit () is repaired. Furthermore, the device () according to the invention makes it possible to start the internal combustion engine in a position locked in a mid-position, without a movable element () of the hydraulic actuation device () butting against a side wall of a pressure space () when the internal combustion engine is started. Methods are proposed to bring the actuation device () into a locked mid-position, and to hold it there, for the restarting of the internal combustion engine.