Patents Assigned to GST Systeme, Gesellschaft Fur Abscheide-Und Steuertechnik mbH
  • Patent number: 5557923
    Abstract: The invention concerns a method and device for removing particles, in particular soot particles, from exhaust gases produced by internal-combustion engines. The invention calls for the particles to be electrostatically charged by an electrode (4). The particles or particle agglomerates are trapped by a fine-mesh metal filter (5). The conducting material (5a), preferably a sintered ferritic metal, of which the filter (5) is made can also be used as a collecting electrode. A high voltage (6) is applied (7, 10) to the electrodes. At intervals, preferably at regular intervals, an electric current is passed (11, 12) through the filter (5), causing the filter material (5a) to heat up to a temperature above the ignition temperature of the particles. The preferred shape of the filter surface is a cylinder, truncated cone and/or cone.
    Type: Grant
    Filed: March 9, 1995
    Date of Patent: September 24, 1996
    Assignees: Linde Aktiengesellschaft, GST Systeme, Gesellschaft Fur Abscheide-Und Steuertechnik mbH
    Inventors: Heinz Bolt, Franz Walser, Axel Schoneborn