Patents by Inventor Karl-Ernest Haak

Karl-Ernest Haak 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).

  • Emission control system for an internal-combustion engine
    Patent number: 6170259
    Abstract: An emission control system for an internal-combustion engine has at least one nitrogen oxide adsorber for the periodic adsorption and desorption of nitrogen oxides contained in the exhaust gas of the internal-combustion engine. A desorption gas pipe has an externally heatable catalyst arranged therein to which a mixture of air and/or exhaust gas can be fed as well as fuel at an at least stoichiometric proportion. This mixture is burned to form a desorbing gas flow which is fed to the respective nitrogen oxide adsorber for the nitrogen oxide desorption.
    Type: Grant
    Filed: October 29, 1998
    Date of Patent: January 9, 2001
    Assignee: DaimlerChrysler AG
    Inventors: Walter Boegner, Karl-Ernest Haak, Bernd Krutzsch, Dirk Voigtlaender, Guenter Wenninger, Friedrich Wirbeleit