Approach for aftertreatment system modeling and model identification
AssigneeGarrett Transportation I 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.
Claims6
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 computer is configured to construct the catalyst model by an identification procedure;
- the identification procedure comprises a catalyst parameter identification procedure, which the computer is configured to perform by:
- determining catalyst parameters for the catalyst device;
- specifying initial values for the catalyst parameters;
- identifying components from flow bench data that permits preparation of exhaust gas composition from the engine;
- and
- identifying system level details from data of the exhaust gas composition from the engine, using the identified components from flow bench data as a starting point for identifying system level details;
- further wherein a final set of parameters of the catalyst model is generated from the identifying of system level details.
A method of catalyst modeling in a system that includes each of 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;
- the method comprising using an identification procedure to accomplish the modelling, the identification procedure including a catalyst parameter identification procedure which comprises:
- determining catalyst parameters for the catalyst device;
- specifying initial values for the catalyst parameters;
- identifying components from flow bench data that permits preparation of exhaust gas composition from the engine;
- identifying system level details from data of the exhaust gas composition from the engine, using the identified components from flow bench data as a starting point for identifying system level details;
- and
- generating a final set of parameters of the catalyst model from the identifying of system level details.
Dependencies are inferred from the claim text.