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Simulation of Catalytic Oxidation and Selective Catalytic NOx Reduction in Lean-Exhaust Hybrid Vehicles.
| 题名： | Simulation of Catalytic Oxidation and Selective Catalytic NOx Reduction in Lean-Exhaust Hybrid Vehicles. |
| 作者： | Chakravarthy, V. K.; Daw, C. S.; Gao, Z. |
| 关键词： | Air Pollution Control; Catalysts; Diesel Engines; Exhaust Emission; Hybrid Electric Powered Vehicles; Nitrogen Oxides; Oxidation; Performance; Reduction; Simulation; Transients |
| 摘要： | We utilize physically-based models for diesel exhaust catalytic oxidation and urea-based selective catalytic NOx reduction to study their impact on drive cycle performance of hypothetical light-duty diesel-powered hybrid and plug-in hybrid vehicles (HEVs and PHEVs). The models have been implemented as highly flexible SIMULINK block modules that can be used to study multiple engine-aftertreatment system configurations. The parameters of the NOx reduction model have been adjusted to reflect the characteristics of commercially available Cu-zeolite catalysts, which are of widespread current interest. We demonstrate application of these models using the Powertrain System Analysis Toolkit (PSAT) software for vehicle simulations, along with a previously published methodology that accounts for emissions and temperature transients in the engine exhaust. Our results illustrate that the DOC-SCR combination can reduce CO, HC and NOx emissions without creating a significant direct fuel penalty, but there is also an increase in the possibility of ammonia slip. |
| 报告类型： | 科技报告 |
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