Oxygen based particulate filter regeneration strategy
AssigneeGM Global Technology Operations LLC
InventorsFrank Ament, David B. Brown
Life of this patent
Estimating the term…
Abstract
A particulate filter regeneration method for an internal combustion engine system is provided. The method includes: receiving an outlet temperature signal corresponding to a temperature at an outlet of a particulate filter; receiving an oxygen signal corresponding to an oxygen level in exhaust flowing from said particulate filter; and controlling at least one of airflow and fuel based on said oxygen level such that said outlet temperature is within a desired range.
Claims20
A system for controlling regeneration of a particulate filter, comprising:
- a substrate temperature sensor that senses a temperature of a particulate filter substrate and that generates a temperature signal based on said particulate filter substrate temperature;
- an air fuel sensor that senses an oxygen level in exhaust flowing from the particulate filter and generates an oxygen signal based on said oxygen level;
- and
- a control module that receives said particulate filter substrate temperature signal and said oxygen signal and controls regeneration of said particulate filter to maintain said oxygen signal within a range that is a function of said temperature signal.
A particulate filter regeneration method for an internal combustion engine system, comprising:
- receiving a substrate temperature signal corresponding to a temperature of a particulate filter substrate;
- receiving an oxygen signal corresponding to an oxygen level in exhaust flowing from said particulate filter;
- and
- controlling at least one of airflow and fuel based on said oxygen level such that said oxygen level is maintained within a desired range that is a function of said temperature.
A system comprising:
- a substrate temperature sensor that measures a temperature of a substrate of a particulate filter;
- an air fuel sensor that measures an oxygen level in exhaust flowing from the particulate filter;
- and
- a control module that maintains the oxygen level within a range by controlling regeneration of the particulate filer, wherein the range is a function of the temperature.
Dependencies are inferred from the claim text.