The EU emission standards for new rail Diesel engines are becoming even more stringent. EGR and SCR technologies can both be used to reduce NOx emissions; however, the use of EGR is usually accompanied by an increase in PM emissions and may require a DPF. On the other hand, the use of SCR requires on-board storage of urea. Thus, it is necessary to study these trade-offs in order to understand how these technologies can best be used in rail applications to meet new emission standards.The present study assesses the application of these technologies in Diesel railcars on a quantitative basis using one and three dimensional numerical simulation tools. In particular, the study considers a 560 kW railcar engine with the use of either EGR or SCR based solutions for NOx reduction. The NOx and PM emissions performances are evaluated over the C1 homologation cycle.The simulation results indicate that either EGR or SCR based solutions can be used to achieve Stage IIIB NOx limits for the 560 kW engine, with an acceptable trade-off regarding BSFC in the case of EGR solutions. In the case of EGR, though, a DPF is necessary to meet Stage IIIB PM limits. Furthermore, SCR based solutions have the potential to go beyond the Stage IIIB NOx limit by scaling up the size of the SCR device and the on-board urea storage.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Emission Reduction Technologies for the Future Low Emission Rail Diesel Engines: EGR vs SCR


    Additional title:

    Sae Technical Papers



    Conference:

    11th International Conference on Engines & Vehicles ; 2013



    Publication date :

    2013-09-08




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




    Future diesel engines for rail applications - efficient and low-emission

    Wegmann,A. / Fuchs,T. / Voith Turbo,DE | Automotive engineering | 2014


    Future diesel engines for rail applications – efficient and low-emission

    Wegmann, Andreas / Fuchs, Thorsten | Springer Verlag | 2014


    Emission Reduction Technologies for Turbocharged Engines

    Mitsuishi, S. / Mori, K. / Nishizawa, K. et al. | British Library Conference Proceedings | 1999


    Emission reduction technologies for turbocharged engines

    Mitsuishi,S. / Mori,K. / Nishizawa,K. et al. | Automotive engineering | 1999


    Emission processes and control technologies in diesel engines

    Society of Automotive Engineers | TIBKAT | 1995