Patents by Inventor J{umlaut over (u)}rgen Höhne

J{umlaut over (u)}rgen Höhne 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).

  • Process for the operation of a nitrogen oxides storage catalyst
    Patent number: 6171565
    Abstract: A process of operating a nitrogen oxides storage catalyst of an exhaust gas treatment system is described. The process relates to the cycling of the normalized air/fuel ratio &lgr;-value of the exhaust gas exiting the engine, in which a lambda value greater than 1 represents oxygen-rich, lean burn conditions in which a sorption phase for the sorption of nitrogen oxides takes place; and in which a lambda value less than 1 represents oxygen-poor, rich burn conditions in which a desorption and conversion phase for the desorption and conversion of nitrogen oxides takes place. The &lgr;-value of the exhaust gas downstream from the storage catalyst is monitored during the desorption and conversion phase to determine the end of the desorption and conversion phase based on the &lgr;-value falling below a predetermined threshold value.
    Type: Grant
    Filed: January 8, 1999
    Date of Patent: January 9, 2001
    Assignee: Degussa-Huls Aktiengesellschaft
    Inventors: J{umlaut over (u)}rgen Höhne, Wolfgang Strehlau, Egbert Lox, Thomas Kreuzer