The focus of the work was to evaluate the potential of SCR coated particulate filter (SDPF) concept with regard to its NOx conversion performance using an in-house developed simulation tool (FEV SimEx). The catalyst models were pre-calibrated based on measurement values from laboratory gas bench and validated in cold NEDC by comparing the experimental results from vehicle chassis dynamometer with simulations. Size and porosity of the SDPF was established to realize identical backpressure behavior as DPF and identical SCR efficiency as used in the classical EAS configuration. The overall results suggest that there is a good potential to achieve higher overall NOx conversion with the DOC+SDPF system, compared to classical DOC+DPF+SCR system. The main results from the analysis are summarized as below: SDPF concept with standard mixing length increases the NOx conversion from 49% to 69% compared to the classical system. A reduction of the mixing length by 400 mm enhances the SCR light-off behavior further and is able to deliver an overall NOx conversion of 71%. Similar behavior was also indicated within FTP cycle, where the NOx conversion could be increased from 79% for the classical layout to 90% and 92% for the SDPF configurations respectively.
Innovative, combined systems with SCR for upcoming stringent emission standards in US and EU
2013
20 Seiten, 15 Bilder, 8 Quellen
Aufsatz (Konferenz)
Englisch
Innovative, combined systems with SCR for upcoming stringent emission standards in US and EU
Kraftfahrwesen | 2013
|Combined Particulate Matter and NOx Aftertreatment Systems for Stringent Emission Standards
British Library Conference Proceedings | 2007
|Combined Particulate Matter and NOx Aftertreatment Systems for Stringent Emission Standards
SAE Technical Papers | 2007
|Combined particulate matter and NOx aftertreatment systems for stringent emission standards
Kraftfahrwesen | 2007
|British Library Conference Proceedings | 2020
|