Patents by Inventor Axel Lang

Axel Lang 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).

  • Publication number: 20010054282
    Abstract: A method and apparatus is provided for monitoring the operation of a NOx storage catalytic converter in the exhaust stream of an internal combustion engine. The NOx content of the gas stream upstream and downstream of the catalytic converter is measured and used to determine storage efficiency. This is compared to a threshold value, and if the threshold value is not met a regeneration process is performed. The storage value is measured after regeneration to determine if the catalytic converter is faulty.
    Type: Application
    Filed: May 14, 2001
    Publication date: December 27, 2001
    Inventors: Axel Lang, Jens Druckhammer, Frank Schulze