公开(公告)号：US20170211443A1

公开(公告)日：2017-07-27

申请号：US15413106

申请日：2017-01-23

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Giacomo LATROFA ,  Giovanni MONTINARO ,  Fabrizio RAMOLIVO ,  Luisa CUSANNO ,  Matteo VENTURINI ,  Barbara MAISOLA

IPC: F01N3/08 ,  F02D41/02 ,  F01N13/08

CPC classification number: F01N3/0885 ,  F01N3/0842 ,  F01N3/0871 ,  F01N9/00 ,  F01N13/082 ,  F01N2900/04 ,  F01N2900/1402 ,  F01N2900/1404 ,  F01N2900/1614 ,  F02D41/0225 ,  F02D41/0275 ,  F02D41/1445 ,  F02D41/1463 ,  F02D2200/0806 ,  F02D2200/0808 ,  F02D2200/501 ,  Y02T10/24 ,  Y02T10/47

Abstract: A method and apparatus are disclosed for controlling the operation of an aftertreatment system for a motor vehicle having a Lean NOx Trap and a tail pipe for conveying exhaust gasses from the LNT to the external environment. Values are calculated for a NOx content in the exhaust gasses flowing in the tail pipe and the quantity of NOx stored in the LNT. A DeNOx request index is calculated as a function of these values. A raw threshold value of the DeNOx request index is calculated as a function of a LNT temperature and of an exhaust gas mass flow. A corrected threshold value of the DeNOx request index is calculated as a function of the raw threshold value of the DeNOx request index and of a correction factor. A DeNOx regeneration is initiated when the calculated value of the DeNOx request index is larger than the corrected threshold value.