公开(公告)号：US20190063289A1

公开(公告)日：2019-02-28

申请号：US15688964

申请日：2017-08-29

Applicant: Caterpillar Inc.

Inventor： Yong Yi ,  Shuhai Hou ,  Hongsheng Sun

IPC: F01N3/20 ,  B01D53/94 ,  G01B11/06

CPC classification number: F01N3/2026 ,  B01D53/9431 ,  B01D53/9477 ,  B01D53/9495 ,  B01D2258/012 ,  F01N3/208 ,  F01N11/00 ,  F01N2560/06 ,  F01N2560/07 ,  F01N2610/02 ,  F01N2900/0422 ,  F01N2900/1404 ,  F01N2900/1411 ,  F01N2900/1812 ,  G01B11/0625

Abstract: A method and system for modeling growth of reductant deposits for an aftertreatment system on a real time basis using input including exhaust gas temperature, exhaust gas flow rate, and reductant dosing rate. The growth of the reductant deposits are affected by a rate at which reductant accumulates and decomposes from a surface of the aftertreatment system. Thus, the method and system disclosed determines a net reductant deposit growth rate value based on a reductant deposit accumulation rate value and a reductant deposit decomposition rate value. Further, the method and system disclosed determines a reductant mass deposit value based on the net reductant deposit growth rate value. The reductant mass deposit value determined by the method and system may then be used to control a regeneration strategy of the aftertreatment system to eliminate the reductant deposits from the aftertreatment system.

公开(公告)号：US10352215B2

公开(公告)日：2019-07-16

申请号：US15688964

申请日：2017-08-29

Applicant: Caterpillar Inc.

Inventor： Yong Yi ,  Shuhai Hou ,  Hongsheng Sun

IPC: F01N3/20 ,  B01D53/94 ,  G01B11/06

Abstract: A method and system for modeling growth of reductant deposits for an aftertreatment system on a real time basis using input including exhaust gas temperature, exhaust gas flow rate, and reductant dosing rate. The growth of the reductant deposits are affected by a rate at which reductant accumulates and decomposes from a surface of the aftertreatment system. Thus, the method and system disclosed determines a net reductant deposit growth rate value based on a reductant deposit accumulation rate value and a reductant deposit decomposition rate value. Further, the method and system disclosed determines a reductant mass deposit value based on the net reductant deposit growth rate value. The reductant mass deposit value determined by the method and system may then be used to control a regeneration strategy of the aftertreatment system to eliminate the reductant deposits from the aftertreatment system.