Method for determining an estimated amount of soot accumulated in a particulate filter of an exhaust gas after-treatment system

Patent metadata

Field	Value
Publication number	US-9366171-B2
Application number	US-201414153449-A
Country	US
Kind code	B2
Filing date	Jan 13, 2014
Priority date	Jan 13, 2014
Publication date	Jun 14, 2016
Grant date	Jun 14, 2016

Abstract

A method for estimating the amount of soot accumulated in a particulate filter of a vehicle exhaust gas system is provided. The system may include an engine, an exhaust gas system, having a particulate filter, and a controller configured to execute the present method. The controller may be configured to evaluate an instantaneous volumetric flow rate of an exhaust gas flowing through the exhaust gas system; monitor an exhaust gas pressure drop across the particulate filter; determine a drive state of the vehicle based on the instantaneous volumetric flow rate of exhaust gas and the exhaust gas pressure drop; and execute one of a first control action when the drive state is a steady-state drive state and a second control action when the drive state is a transient-state drive state.

First claim

The invention claimed is:

1. A method of determining an estimated amount of soot accumulated in a particulate filter of a vehicle exhaust gas system comprising:
evaluating, via a controller, an instantaneous volumetric flow rate of an exhaust gas flowing through the exhaust gas system;
monitoring, via a differential pressure module, an exhaust gas pressure drop across the particulate filter and returning a differential pressure output to the controller; determining, via the cont…

Assignees

• Gm Global Tech Operations Inc

Inventors

• Li Jianwen
• Mital Rahul

Classifications

• F01N2550/04

  Mechanical Engineering · mapped topic

• F01N3/2066

  Mechanical Engineering · mapped topic

• F01N3/106

  Mechanical Engineering · mapped topic

• F01N3/035

  Mechanical Engineering · mapped topic

• F01N11/002

  Mechanical Engineering · mapped topic