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. 21, 2005
Filed:
Nov. 10, 2003
Michael Schleusener, Munich, DE;
Rudolf Flierl, Kaiserslautern, DE;
Michael Schleusener, Munich, DE;
Rudolf Flierl, Kaiserslautern, DE;
Bayerische Motoren Werke AG, Munich, DE;
Abstract
In a valve-driving device for variable adjustment of the lift of a gas exchange valve of an internal combustion engine, wherein the gas exchange valve co-operates, via a transfer element, with a roller which can move about an axis of rotation, with a control path having an idling lift curve and a lift curve in an end area of a spring-loaded pivoting level which is controlled by a cam associated with a cam shaft in order to actuate the lifting of said gas exchange valve. In order to obtain a pure pivoting movement of the pivoting lever, the pivoting center of motion forms a constant instantaneous center of rotation during any actuation of said lift. In order to prevent an impact arising from the valve clearance, the control path of the pivoting lever comprises a ramp, which is correspondingly adapted to the respective valve clearance, between the idling lift curve and the lift curve.