Patents by Inventor Chris FREHSE

Chris FREHSE 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 detecting the icing of a particulate filter, especially of a gasoline particulate filter
    Patent number: 11220947
    Abstract: A method for detecting the icing of a particulate filter, especially of a gasoline particulate filter, includes determining the temperature of the exhaust gas flow flowing through the particulate filter, whereby icing of the particulate filter is detected on the basis of the determined temperature of the exhaust gas flow. The method is improved in that the temperature of the exhaust gas flow upstream from the particulate filter and the temperature of the exhaust gas flow downstream from the particulate filter are determined, whereby on the basis of the measured temperature difference, the heat input into the particulate filter and the quantity of water present in the particulate filter are determined, whereby the aggregates states of the water present in the particulate filter are calculated by drawing up a balance of the heat quantity.
    Type: Grant
    Filed: May 16, 2019
    Date of Patent: January 11, 2022
    Assignee: VOLKSWAGEN AKTIENGESELLSCHAFT
    Inventors: Chris Frehse, Christoph Nee, Sebastian Heinken, Hagen Müller
  • METHOD FOR DETECTING THE ICING OF A PARTICULATE FILTER, ESPECIALLY OF A GASOLINE PARTICULATE FILTER
    Publication number: 20190353076
    Abstract: A method for detecting the icing of a particulate filter, especially of a gasoline particulate filter, includes determining the temperature of the exhaust gas flow flowing through the particulate filter, whereby icing of the particulate filter is detected on the basis of the determined temperature of the exhaust gas flow. The method is improved in that the temperature of the exhaust gas flow upstream from the particulate filter and the temperature of the exhaust gas flow downstream from the particulate filter are determined, whereby on the basis of the measured temperature difference, the heat input into the particulate filter and the quantity of water present in the particulate filter are determined, whereby the aggregates states of the water present in the particulate filter are calculated by drawing up a balance of the heat quantity.
    Type: Application
    Filed: May 16, 2019
    Publication date: November 21, 2019
    Applicant: VOLKSWAGEN AKTIENGESELLSCHAFT
    Inventors: Chris FREHSE, Christoph NEE, Sebastian HEINKEN, Hagen MÜLLER