Patents Examined by Maribel Medina-Sanabna
  • Process for reducing nitrogen oxides on SCR catalyst
    Patent number: 6399034
    Abstract: A process for reducing nitrogen oxides on a SCR catalyst disposed in an exhaust gas system of an internal combustion engine is performed by a device adapted to introduce ammonia (NH3) into the exhaust gas flow of the exhaust gas system before it reaches the SCR catalyst. The device includes a heatable pressure-tight converter, an NH3 store and a control unit with control signals processing engine operating characteristics and determining therefrom the NOx output for controlling a timed valve for injection of an NH3 dose.
    Type: Grant
    Filed: January 27, 2000
    Date of Patent: June 4, 2002
    Assignee: HJS Fahrzeugtechnik GmbH & Co.
    Inventor: Werner Weisweiler