Thermally efficient advanced diesel exhaust aftertreatment for cleaner vehicles

摘要: Increased diesel vehicle use and growing concerns about the health environmental effects of exhaust gas pollutants lead to a greater attention upon reduction emissions. The evolution driving patterns technologies lower average temperatures. This can limit aftertreatment (catalyst) system's ability meet increasingly stringent emissions legislation. A thermally efficient system be produced through advanced novel catalyst designs. research work presented in this thesis investigates oxidation (DOC) properties that enhance performance at low temperatures. Firstly, an two-catalyst configuration is designed widens operating temperature window. Catalyst cell density, wall thickness material choices were optimised using theoretical equations, modelling tools experimental approach. Secondly, strategics developed assist activity understanding species interactions (inhibition promotion) within catalyst. was achieved by varying composition inlet, alternative fuels combustion modes. Finally, component combining filtration/oxidation function (partial-flow filter) found promote particulate removal while reducing needs for filter active regeneration.