Analysis of the Driving Altitude and Ambient Temperature Impact on the Conversion Efficiency of Oxidation Catalysts
作者： Pedro Piqueras , José Ramón Serrano , Enrique José Sanchis , Bárbara Diesel
DOI: 10.3390/APP11031283
关键词:
摘要: Worldwide emission standards are extending their requirements to cover engine operation under extreme ambient conditions and fill the gap between type-approval real driving conditions. The new boundaries affect performance raw emissions as well efficiency of exhaust aftertreatment systems. This study evaluates impact high altitude low temperature on light-off conversion an oxidation catalyst. results compared in a common range mass flow with baseline sea-level at 20 ∘ C. A reduction CO HC efficiencies was found 2500 m −7 C, relevant increase for both pollutants. analysis experimental data complemented use catalyst model identify causes leading deterioration light-off. allowed identifying, same temperature, contributions variation caused by change engine-out tailpipe pressure, which are, turn, manifested reactants partial pressure dwell time governing parameters.
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