METHOD FOR DETERMINING AN ESTIMATED AMOUNT OF SOOT ACCUMULATED IN A PARTICULATE FILTER OF AN EXHAUST GAS AFTER-TREATMENT SYSTEM

摘要

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.

主权项

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 controller, a drive state of the vehicle based on the instantaneous volumetric flow rate of the exhaust gas and the exhaust gas pressure drop across the particulate filter, wherein the drive state is one of a steady-state drive state and a transient-state drive state; and executing, via the controller, one of a first control action when the drive state is the steady-state drive state and a second control action when the drive state is the transient-state drive state.