METHODS AND DEVICES FOR CONTROLLING UREA MIXERS TO REDUCE NOx EMISSION FROM COMBUSTION ENGINES

摘要: The present invention discloses methods and devices for controlling a heated mixer, situated downstream of Urea-Water Solution (UWS) injector, to reduce NOx emission in an exhaust system from combustion engines, wherein the has Selective Catalytic Reduction (SCR) catalyst UWS injector Methods include: determining reduction efficiency SCR catalyst; evaluating at least one reductant Uniformity Index (UI) based on operating parameters mixer power calculation map; modifying temperature by regulating UI order improve and/or efficiency. Alternatively, method further includes: detecting potential improvement increased ammonia mass.