Patents by Inventor Anders Klas Andreasson

Anders Klas Andreasson 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).

  • Methods of controlling reductant addition
    Patent number: 7861516
    Abstract: An exhaust system for a vehicular lean-burn internal combustion engine includes a NOx reduction catalyst, a source reductant, means (20) for contacting the catalyst with the reductant, means for sensing the temperature of the exhaust gas and/or the catalyst bed and means, when in use, for controlling reductant addition. The reductant addition control means supplies an amount of reductant to the catalyst at a rate corresponding to a measured temperature value of the exhaust gas and/or catalyst bed, which temperature value has been pre-determined to correlate, in use, with an amount of NOx in the exhaust gas.
    Type: Grant
    Filed: June 18, 2004
    Date of Patent: January 4, 2011
    Assignee: Johnson Matthey Public Limited Company
    Inventors: Eive Tord Ronny Allansson, Anders Klas Andreasson, Claus Friedrich Goersmann, Mats Lavenius, Martyn Vincent Twigg, Andrew Peter Walker
  • Device and method for removing sooty particulate from exhaust gases from combustion processes
    Patent number: 6680037
    Abstract: A canister (1) contains a catalyst for generating NO2 and a filter (8) for trapping PM, e.g. from diesel engines. The filter is thermally isolated from the canister, and preferably is surrounded by an annular monolith comprising the NO oxidation catalyst or a SCR catalyst. The invention facilitates the combustion of PM even at low exhaust gas temperatures, in a compact device.
    Type: Grant
    Filed: June 17, 2002
    Date of Patent: January 20, 2004
    Assignee: Johnson Matthey Public Limited Company
    Inventors: Ronny Allansson, Anders Klas Andreasson, Guy Richard Chandler, James Patrick Warren