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US 2015/0092809 A1Published application
Systems and methods for on-board diagnostics of a particulate matter filter
AssigneeCummins Inc.
InventorsNassim Khaled, Richard A. Booth
Life of this patent
Estimating the term…
Abstract
An apparatus, system, and method are provided for determining a health value of a catalyzed diesel particulate filter using a midbed temperature of the catalyzed diesel particulate filter and a reference temperature.
Claims19
A system comprising:
- an internal combustion engine having an exhaust stream;
- a particulate filter disposed downstream of and fluidly coupled to said engine, and having a filter first end and a filter second end downstream of said filter first end;
- a first temperature sensor operatively coupled to said exhaust stream and disposed between said filter first end and said filter second end, and provides a first temperature value;
- a controller comprising:
- a temperature sensor processing module structured to interpret said first temperature value and a reference temperature value;
- a particulate filter failure threshold module structured to determine a particulate filter failure threshold value;
- and
- a particulate filter diagnostic module structured to determine a particulate filter health value in response to said first temperature value, said reference temperature value, and said particulate filter failure threshold value, and to provide said particulate filter health value to an output device.
5 more elements
An apparatus comprising:
- an electronic controller operable to receive a first signal from a first temperature sensor associated with a particulate filter and a second signal from a second temperature sensor operatively coupled at a mid-bed location of the particulate filter, wherein the controller includes:
- a temperature sensor processing module structured to interpret a first temperature value from the first temperature sensor and a second temperature value from the second temperature sensor, and to determine a temperature comparison value by comparing said first temperature value to said second temperature value;
- a particulate filter failure threshold module structured to determine a particulate filter failure threshold value;
- and
- a particulate filter diagnostic module structured to determine a particulate filter health value in response to said temperature comparison value and said particulate filter failure threshold value, and to provide said particulate filter health value to an output device.
2 more elements
A method comprising:
- providing an internal combustion engine with an exhaust stream and a particulate filter fluidly coupled thereto;
- interpreting a first temperature signal and a second temperature signal to determine a first temperature value and a second temperature value;
- determining a temperature comparison value by comparing said first temperature value to said second temperature value;
- interpreting a particulate filter failure threshold value;
- determining a particulate filter health value in response to said temperature comparison value and said particulate filter failure threshold value;
- and
- providing said particulate filter health value to an output device.
4 more elements
Dependencies are inferred from the claim text.