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公开(公告)号:US20050066652A1
公开(公告)日:2005-03-31
申请号:US10949479
申请日:2004-09-24
申请人: David Ketcher , William Ruona
发明人: David Ketcher , William Ruona
IPC分类号: F02D45/00 , B01D53/86 , B01D53/94 , F01N3/08 , F01N3/20 , F01N3/28 , F01N13/02 , F02B3/06 , F02D41/02 , F02D41/10 , F01N3/00 , F01N3/10
CPC分类号: B01D53/9431 , B01D53/9495 , F01N3/208 , F01N13/009 , F01N2250/04 , F01N2250/12 , F01N2610/02 , F01N2610/03 , F01N2900/0404 , F02B3/06 , F02D41/0275 , F02D41/107 , F02D2200/1012 , Y02A50/2325 , Y02T10/24
摘要: A method for improving NOx conversion efficiency of a Nox-reducing catalyst by determining an accurate amount of reductant required is presented. The method includes calculating an initial reductant injection amount based on a steady state amount of NOx in the engine feedgas and adjusting the initial amount to compensate for transient NOx emissions. The compensation is initiated in response to an engine transient, such as impending acceleration or deceleration. This method further results in improved vehicle fuel economy.
摘要翻译: 提出了通过确定所需的精确量的还原剂来提高NO x还原催化剂的NOx转化效率的方法。 该方法包括基于发动机进气中的稳定状态量的NOx计算初始还原剂喷射量,并调整初始量以补偿瞬态NOx排放。 补偿是根据发动机瞬态起动的,例如即将加速或减速。 该方法进一步导致车辆燃料经济性的改善。