公开(公告)号：US06679051B1

公开(公告)日：2004-01-20

申请号：US10064626

申请日：2002-07-31

申请人： Michiel J. van Nieustadt ,  Devesh Upadhyay ,  William Charles Ruona

发明人： Michiel J. van Nieustadt ,  Devesh Upadhyay ,  William Charles Ruona

IPC分类号： F01N300

CPC分类号： F01N3/0885 ,  F01N3/0842 ,  F01N3/0878 ,  F01N13/011 ,  F01N2610/02 ,  F01N2610/03

摘要： An exhaust valve downstream of a diesel engine splits exhaust gasses between two catalysts. In one position, most of the exhaust gasses go to a first catalyst, and the remaining exhaust gasses, along with injected reductant go to a second catalyst. In a second position, most of the exhaust gasses go to the second catalyst, and the remaining exhaust gasses, along with injected reductant go to the first catalyst. In this way, a reduced cost system is achieved.