Modelling three-way catalytic converter oriented to engine cold-start conditions
| Autor: | Christopher H. Onder, Benjamín Pla, Raffael Hedinger, Marcelo Real |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Materials science
Nuclear engineering Evaporation Aerospace Engineering Ocean Engineering 02 engineering and technology law.invention 020401 chemical engineering law Catalyst warm-up 0204 chemical engineering After-treatment systems Cold start (automotive) Mechanical Engineering Condensation Control-oriented modelling 021001 nanoscience & nanotechnology Three-way catalyst MAQUINAS Y MOTORES TERMICOS Automotive Engineering Three way Heat transfer Catalytic converter Engine cold-start 0210 nano-technology Water vapor |
| Zdroj: | RiuNet. Repositorio Institucional de la Universitat Politécnica de Valéncia instname |
| ISSN: | 2041-3149 1468-0874 |
| Popis: | This article introduces a physical model of a three-way catalytic converter oriented to engine cold-start conditions. Computational cost is an important factor, particularly when the modelling is oriented to the development of engine control strategies. That is why a one-dimensional one-channel real-time capable model is proposed. The present model accounts for two phases, gas and solid, respectively, considering not only the heat transfer by convection between both, but also the water vapour condensation and evaporation in the catalyst brick, which plays a key role during engine cold-start. Moreover, the model addresses the conductive heat flow, heat losses to the environment and exothermic reactions in the solid phase, as well as the convective heat flow in the gas phase. Regarding the chemical model, the oxidation of hydrocarbons and carbon monoxide is considered by means of the Langmuir–Hinshelwood mechanism. Three layers make up the model structure from a kinetic point of view, bulk gas, washcoat pores and noble metal in the catalyst surface. The model takes fuel-to-air ratio, exhaust gas mass flow, temperature, pressure and gas composition as inputs, providing the thermal distribution as well as the species concentration along the converter. |
| Databáze: | OpenAIRE |
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