Patents by Inventor Stefan Kohrs

Stefan Kohrs 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).

  • Patent number: 12158096
    Abstract: A mixer assembly comprises a tubular housing including an exhaust gas inlet, an exhaust gas outlet, and a reductant inlet on a side of the tubular housing. An upstream mixing element is positioned within the tubular housing upstream from the reductant inlet. A downstream mixing element is positioned within the tubular housing downstream from the reductant inlet and the upstream mixing element. The upstream and downstream mixing elements at least partially define a reductant receiving mixing chamber in which the injected reductant and exhaust gas mix. A divider is positioned within the tubular housing downstream from the upstream mixing element to split the exhaust into two divided flow streams prior to exiting through the exhaust gas outlet.
    Type: Grant
    Filed: June 2, 2023
    Date of Patent: December 3, 2024
    Assignee: Tenneco GmbH
    Inventors: Sascha Haverkamp, Joachim Gehrlein, Stefan Kohrs, Eric A. Hein, Attila Kovacs
  • Patent number: 11702975
    Abstract: A mixer comprises a tubular housing defining a longitudinal axis along which exhaust gas flows. Injected reductant flows along an injection axis that extends at a non-parallel angle to the longitudinal axis. A first flow guide element extends across and blocks a portion of the tubular housing and includes a first aperture extending therethrough. The first flow guide element is positioned upstream from the reductant inlet such that exhaust gas flowing through the first aperture is impinged by the reductant. A second flow guide element is positioned downstream from the first flow guide element and fixed to the first flow guide element to define a mixing chamber in which injected reductant and exhaust gas mix. An intermediate wall is integrally formed with one of the first and second flow guide elements. The other of the first and second flow guide elements is fixed to the intermediate wall.
    Type: Grant
    Filed: September 7, 2022
    Date of Patent: July 18, 2023
    Assignee: Tenneco GmbH
    Inventors: Sascha Haverkamp, Joachim Gehrlein, Stefan Kohrs, Eric A. Hein, Attila Kovacs
  • Patent number: 11466606
    Abstract: A mixer assembly for mixing an injected reductant with an exhaust gas comprises a tubular housing including a reductant inlet, an exhaust gas inlet and an exhaust gas outlet. The reductant inlet is positioned on a first side of the tubular housing and oriented to direct injected reductant along an injection access that extends transversely to a longitudinal axis. A first flow guide element is shaped as a sheet including a first aperture extending therethrough as well as a surface facing upstream. Exhaust gas flowing through the first aperture is impinged by the injected redundant. A second flow guide element is shaped as a sheet, positioned downstream from the first flow guide element and fixed to the first flow guide element to define a mixing chamber between the first flow guide element and the second flow guide element in which the injected redundant and the exhaust gas mix.
    Type: Grant
    Filed: April 29, 2021
    Date of Patent: October 11, 2022
    Assignee: Tenneco GmbH
    Inventors: Sascha Haverkamp, Joachim Gehrlein, Stefan Kohrs, Eric A. Hein, Attila Kovacs
  • Patent number: 10995643
    Abstract: A mixer assembly comprises a tubular housing including a reductant inlet, an exhaust gas inlet and an exhaust gas outlet. The tubular housing defines a longitudinal axis along which exhaust enters the housing. The reductant inlet is positioned on a first side of the tubular housing. An upstream element covers approximately one-half of the cross sectional area of the enhaust gas inlet and is positioned upstream of the reductant inlet. An upstream surface of the upstream mixing element directs exhaust gas flow transversly toward the reductant inlet. A downstream mixing element along with the upstream mixing element at least partially defines a reductant receiving duct in which injected reductant and exhaust gas mix.
    Type: Grant
    Filed: March 19, 2019
    Date of Patent: May 4, 2021
    Inventors: Sascha Haverkamp, Joachim Gehrlein, Stefan Kohrs, Eric A. Hein, Attila Kovacs
  • Patent number: 9003771
    Abstract: The invention relates to a static mixer for an exhaust gas system of an internal combustion engine-driven vehicle, with a plurality of flow guide elements which influence the flow of an exhaust gas stream and which are inclined at a given angle relative to the mixer plane and are held in the exhaust gas channel by means of at least one retaining strip. According to the invention the at least one retaining strip is made resilient at least in partial regions and/or is elastically supported in the plane of the mixer.
    Type: Grant
    Filed: October 7, 2008
    Date of Patent: April 14, 2015
    Assignee: Audi AG
    Inventors: Axel Peters, Marko Buder, Stefan Gerdon, Stefan Kohrs, Manfred Doll
  • Patent number: 8272777
    Abstract: The invention relates to a method for mixing an exhaust gas flow with a fluid in an exhaust gas pipe 40 of an exhaust gas system 4, in which the fluid is injected by means of an injection device 5 into the exhaust gas pipe 40. The exhaust gas flow is guided in the exhaust gas pipe 40 in the area of the injection device 5 in a direction of flow S parallel to the exhaust gas pipe 40. The fluid is injected directly onto a deflection element 6 which is arranged in the exhaust gas pipe 40 in a central direction of injection E which deviates from the direction of flow S by an angle se, wherein by means of at least one sheet metal part 60 which is provided on the deflection element 6 and which is raised at least partially at an angle sv with reference to the direction of flow S, the exhaust gas flow is diverted with reference to the direction of flow S from its direction of flow S into a central direction of distribution V.
    Type: Grant
    Filed: April 21, 2009
    Date of Patent: September 25, 2012
    Assignee: Heinrich Gillet GmbH (Tenneco)
    Inventors: Stefan Kohrs, Manfred Doll, Balthasar Hipp, Günter Palmer, Joachim Gehrlein, Markus Jost, Andreas Lang
  • Publication number: 20100293931
    Abstract: The invention relates to a static mixer for an exhaust gas system of an internal combustion engine-driven vehicle, with a plurality of flow guide elements which influence the flow of an exhaust gas stream and which are inclined at a given angle relative to the mixer plane and are held in the exhaust gas channel by means of at least one retaining strip. According to the invention the at least one retaining strip (2, 3) is made resilient at least in partial regions and/or is elastically supported in the plane of the mixer.
    Type: Application
    Filed: October 7, 2008
    Publication date: November 25, 2010
    Inventors: Axel Peters, Marko Buder, Stefan Gerdon, Stefan Kohrs, Manfred Doll
  • Publication number: 20090262599
    Abstract: The invention relates to a method for mixing an exhaust gas flow with a fluid in an exhaust gas pipe 40 of an exhaust gas system 4, in which the fluid is injected by means of an injection device 5 into the exhaust gas pipe 40. The exhaust gas flow is guided in the exhaust gas pipe 40 in the area of the injection device 5 in a direction of flow S parallel to the exhaust gas pipe 40. The fluid is injected directly onto a deflection element 6 which is arranged in the exhaust gas pipe 40 in a central direction of injection E which deviates from the direction of flow S by an angle se, wherein by means of at least one sheet metal part 60 which is provided on the deflection element 6 and which is raised at least partially at an angle sv with reference to the direction of flow S, the exhaust gas flow is diverted with reference to the direction of flow S from its direction of flow S into a central direction of distribution V.
    Type: Application
    Filed: April 21, 2009
    Publication date: October 22, 2009
    Applicant: HEINRICH GILLET GMBH (TENNECO))
    Inventors: Stefan Kohrs, Manfred Doll, Balthasar Hipp, Gunter Palmer, Joachim Gehrlein, Markus Jost, Andreas Lang