Patents by Inventor Dirk Mehlfeldt

Dirk Mehlfeldt has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Method for determining the position of a movable shut-off element of an injection valve
    Publication number: 20060082252
    Abstract: A method for determining the position of a movable shut-off element, in particular a valve needle, of an injection valve in a motor vehicle engine. The shut-off element is driven by means of a piezo element for the opening or closing of the injection valve. A voltage signal assigned to an electrical voltage detected at the piezo element is determined and used for determining the position of the shut-off element. By means of a model, a modelled variation of the voltage is determined and is likewise used for determining the position of the shut-off element. In particular, the determination of the position of the shut-off element takes place by using the difference from the modelled variation of the voltage and the determined voltage signal.
    Type: Application
    Filed: May 12, 2005
    Publication date: April 20, 2006
    Applicant: DaimlerChrysler AG
    Inventors: Klaus Allmendinger, Tobias Flaemig-Vetter, Michael Froehlich, Zandra Jansson, Stefan Knedlik, Kai Koenig, Otmar Loffeld, Dirk Mehlfeldt, Holger Nies, Valerij Peters, Guenter Stoehr