公开(公告)号：EP2181756A1

公开(公告)日：2010-05-05

申请号：EP08167975.5

申请日：2008-10-30

Applicant: Delphi Technologies Holding S.à.r.l.

Inventor： Parmentier, Michael ,  Schmitt, Julien

IPC: B01D53/90 ,  B01D53/94 ,  F01N3/20

CPC classification number: B01D53/90 ,  B01D53/9431 ,  B01D53/9495 ,  F01N3/208 ,  F01N2560/026 ,  F01N2610/06 ,  F01N2900/0408 ,  F01N2900/14 ,  F01N2900/1616 ,  F01N2900/1621 ,  Y02C20/10 ,  Y02T10/24

Abstract: A method for controlling a selective catalytic reduction catalyst in an exhaust line of an internal combustion engine is disclosed, wherein the supply of a quantity of a gaseous ammonia reductant to the SCR catalyst uses a closed-loop SCR catalyst model coupled to a SCR-out NOx sensor that measures a SCR-out NOx emission value. The closed-loop SCR catalyst model uses a relationship linking the measured SCR-out NOx value to the NOx conversion efficiency and the ammonia slip. The actual NH 3 emission value and/or an actual SCR-out NOx indicative value are computed based upon differentiation of said relationship.

Abstract translation: 公开了一种用于控制内燃机的排气管路中的选择性催化还原催化剂的方法，其中向SCR催化剂供应一定量的氨气还原剂使用一个闭环SCR催化剂模型，该催化剂模型与SCR- 测量SCR排出NOx排放值的NOx传感器。 闭环SCR催化剂模型使用测量的SCR-排出NOx值与NOx转化效率和氨滑移相关联的关系。 基于所述关系的差异来计算实际的NH 3排放值和/或实际的SCR-out NOx指示值。