{"title":"A two-time-scale infinite-adsorption model of three way catalytic converters","authors":"L. Glielmo, S. Santini, G. Serra","doi":"10.1109/ACC.1999.786557","DOIUrl":null,"url":null,"abstract":"New regulations for emission control make urgent the performance improvement of the cascade engine-TWC (three-way catalytic converters). An important problem is minimization of the harmful emissions during the transient warm-up phase (where the largest amount of dangerous emissions is concentrated). In this perspective, dynamical TWC models, simple enough for online computation, are required. We present a distributed parameters TWC model suitable for the design and test of warm-up control strategies, obtained by considering an infinite adsorption rate between gas and substrate. The integration algorithm is based partly on a 'method of lines' space-discretization, partly on the 'method of characteristics' for 'quasi linear' hyperbolic PDEs, the separation being allowed by a two time scale analysis of the system. The model has been identified, through a purposely designed genetic algorithm, and validated on experimental data.","PeriodicalId":441363,"journal":{"name":"Proceedings of the 1999 American Control Conference (Cat. No. 99CH36251)","volume":"53 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"1999-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"8","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Proceedings of the 1999 American Control Conference (Cat. No. 99CH36251)","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/ACC.1999.786557","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 8
Abstract
New regulations for emission control make urgent the performance improvement of the cascade engine-TWC (three-way catalytic converters). An important problem is minimization of the harmful emissions during the transient warm-up phase (where the largest amount of dangerous emissions is concentrated). In this perspective, dynamical TWC models, simple enough for online computation, are required. We present a distributed parameters TWC model suitable for the design and test of warm-up control strategies, obtained by considering an infinite adsorption rate between gas and substrate. The integration algorithm is based partly on a 'method of lines' space-discretization, partly on the 'method of characteristics' for 'quasi linear' hyperbolic PDEs, the separation being allowed by a two time scale analysis of the system. The model has been identified, through a purposely designed genetic algorithm, and validated on experimental data.
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