Exhaust-gas purification system for the selective catalytic reduction of nitrogen oxides in the lean exhaust gas of internal combustion engines and method of exhaust-gas purification
作者： Barry Van Setten , Jurgen Gieshoff , Thomas Kreuzer , Egbert Lox , Markus Pfeifer
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摘要: The present invention relates to an exhaust-gas purification system for the selective catalytic reduction of nitrogen oxides. includes at least one catalyst having catalytically active components (SCR components). An NOx storage (5) is arranged upstream SCR (3) in system. For performing reduction, metering means (8) supplying a compound decomposable into ammonia provided between and (3). At low exhaust-gas temperatures, adsorbs oxides contained exhaust gas desorbs them only rising so that they can afterwards be converted by which then. This results altogether improved conversion rate
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