公开(公告)号：US10233811B2

公开(公告)日：2019-03-19

申请号：US15470327

申请日：2017-03-27

Applicant: GM Global Technology Operations LLC

Inventor： Michael A. Smith ,  Pu Sun ,  Harish Kohli

IPC: F01N3/00 ,  F01N3/20 ,  F01N3/023 ,  F01N3/035 ,  F01N3/10 ,  F01N9/00

Abstract: An engine control system includes a selective catalyst reduction (SCR) device that reduces nitrogen oxide (NOx) in exhaust gas in the presence of the reductant. A particulate filter (PF) is disposed downstream from the SCR device to collect particulate matter from the exhaust gas stream. The engine control system further includes an electronic hardware that calculates a particulate matter load value indicating an amount of particulate matter collected in the PF, and calculate a CCB value that compensates for pressure differential variations across the PF. The controller further calculates a CCB correction value that modifies the CCB value and compensates for an amount of reductant that slips from the SCR device and induces the pressure differential variations. In this manner, the electronic hardware controller can control a regeneration system to increase the temperature of the PF to burn off particulate matter from the PF based on the modified CCB value.

公开(公告)号：US20180274422A1

公开(公告)日：2018-09-27

申请号：US15470327

申请日：2017-03-27

Applicant: GM Global Technology Operations LLC

Inventor： Michael A. Smith ,  Pu Sun ,  Harish Kohli

IPC: F01N3/20 ,  F01N3/035 ,  F01N3/023 ,  F01N9/00 ,  F01N3/10

CPC classification number: F01N3/2066 ,  F01N3/021 ,  F01N3/023 ,  F01N3/035 ,  F01N3/106 ,  F01N9/002 ,  F01N9/005 ,  F01N13/009 ,  F01N2610/02 ,  F01N2610/148 ,  F01N2900/08 ,  F01N2900/1606 ,  F01N2900/1616 ,  F01N2900/1622 ,  Y02A50/2325 ,  Y02T10/24 ,  Y02T10/47

Abstract: An engine control system includes a selective catalyst reduction (SCR) device that reduces nitrogen oxide (NOx) in exhaust gas in the presence of the reductant. A particulate filter (PF) is disposed downstream from the SCR device to collect particulate matter from the exhaust gas stream. The engine control system further includes an electronic hardware that calculates a particulate matter load value indicating an amount of particulate matter collected in the PF, and calculate a CCB value that compensates for pressure differential variations across the PF. The controller further calculates a CCB correction value that modifies the CCB value and compensates for an amount of reductant that slips from the SCR device and induces the pressure differential variations. In this manner, the electronic hardware controller can control a regeneration system to increase the temperature of the PF to burn off particulate matter from the PF based on the modified CCB value.