Title :
A two-time-scale infinite-adsorption model of three way catalytic converters
Author :
Glielmo, Luigi ; Santini, Stefania ; Serra, Gabriele
Author_Institution :
Dipt. di Inf. e Sistemistica, Naples Univ., Italy
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
Keywords :
air pollution control; distributed parameter systems; genetic algorithms; hyperbolic equations; integration; internal combustion engines; partial differential equations; cascade engine; distributed parameters model; emission control; harmful emissions; infinite adsorption rate; method of characteristics; method of lines; quasi linear hyperbolic PDEs; space-discretization; three way catalytic converters; transient warm-up phase; two-time-scale infinite-adsorption model; Algorithm design and analysis; Chemicals; Engines; Exhaust systems; Gases; Magnetic separation; Partial differential equations; Solid modeling; Temperature; Thermal stresses;
Conference_Titel :
American Control Conference, 1999. Proceedings of the 1999
Conference_Location :
San Diego, CA
Print_ISBN :
0-7803-4990-3
DOI :
10.1109/ACC.1999.786557
