首页>
外国专利>
Catalyst operation for selective nitrogen oxides reduction causes potential pollutants nitrogen oxides and ammonia to destroy each other when hot exhaust gases arise
Catalyst operation for selective nitrogen oxides reduction causes potential pollutants nitrogen oxides and ammonia to destroy each other when hot exhaust gases arise
展开▼
机译:选择性还原氮氧化物的催化剂操作会导致潜在的污染物氮氧化物和氨在产生高温废气时互相破坏
展开▼
页面导航
摘要
著录项
相似文献
摘要
A temperature rise is to be expected in the SCR catalyst (3). The reductant quantity which can be stored in the catalyst at the expected temperature is determined. Should there exist a reductant excess ( DELTA m) which cannot be stored as a result of the temperature rise, then the reductant excess ( DELTA m) is consumed. Preferred Features: Consumption of non-storable reductant excess, results from additional, intentionally-generated nitrogen oxides in the exhaust gases. The nitrogen oxides excess, is produced by engine control. It is produced by control of stoichiometry, setting an air/fuel ratio at the engine of lambda = 1.1 and/or by adjustment of ignition timing and/or by reducing exhaust gas recycle and/or by adjusting the start of injection and/or by adjusting the fuel injection pressure.
展开▼