Approach for aftertreatment system modeling and model identification
AssigneeHoneywell International Inc.
InventorsJaroslav PEKAR, Gregory STEWART, Ondrej SANTIN, Daniel PACHNER
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Abstract
A system and approach for catalyst model parameter identification with modeling accomplished by an identification procedure that may incorporate a catalyst parameter identification procedure which may include determination of parameters for a catalyst device, specification of values for parameters and component level identification. Component level identification may be of a thermal model, adsorption and desorption, and chemistry. There may then be system level identification to get a final estimate of catalyst parameters.
Claims15
An identification apparatus comprising:
- a catalyst device for an engine;
- and
- a catalyst model of the catalyst device comprising:
- a thermal model component;
- an adsorption and desorption component;
- a chemical reaction component;
- and
- a global component;
- and
- wherein:
- the thermal model component represents heat transfer of the catalyst device, selected from a group consisting of heat transfer from gas to monolith, heat transfer from monolith to housing, and heat transfer from housing to ambient;
- the adsorption and desorption component incorporates a storage of chemical species for reaction;
- and
- the chemical reaction component incorporates a reaction mechanism for chemical reactions.
A method for catalyst model identification comprising:
- developing a catalyst model;
- processing a first phase comprising a specification of initial values for one or more parameters of the catalyst model;
- processing a second phase comprising a component level identification;
- and
- processing a third phase comprising a system level identification;
- and
- wherein the first, second and third phases are processed by a computer.
A catalyst modeling mechanism comprising:
- a computer;
- an engine from which an engine model is developed and stored in the computer;
- and
- a catalyst device, connected to the engine, from which a catalyst model is developed and stored in the computer;
- and
- wherein:
- the modeling is accomplished by an identification procedure;
- the identification procedure comprises a catalyst parameter identification procedure;
- and
- the catalyst parameter identification procedure comprises:
- determination of parameters for the catalyst device;
- specification of values for the parameters;
- component level identification;
- and
- system level identification.
Dependencies are inferred from the claim text.