In order to comply with emission regulation, reach their profitability targets and minimise the in-use cost of their vehicles, OEMs are seeking solutions to optimise their aftertreatment systems. For Selective Catalytic Reduction (SCR) system engineers, one of the most important challenges is to reduce the system's cost, while keeping its high level of NOx emission reduction performance. Ways to achieve this cost reduction include 1. using an engine out NOx estimation model instead of a NOx sensor upstream of the SDPF (DPF coated with SCR) catalyst and 2. eliminating the Ammonia Slip Catalyst (ASC) downstream of the SDPF catalyst. Achieving these challenging targets requires actions on the complete SCR system, from the optimisation of mixing and uniformity in the SDPF catalyst to the development of robust controls. To face these challenges, a novel exhaust reverse flow concept with a blade mixer was developed. With this concept, total mixing length and mixing performance were increased. The SDPF catalyst uniformity during transient and steady state operation of the engine has been investigated. On the controls side, robust engine out NOx, advanced ammonia storage modelling and robust system adaption controls were developed. Finally, the robustness of the whole SCR system against tolerances and errors through extended sensitivity analysis has been evaluated.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Real Driving Emission Efficiency Potential of SDPF Systems without an Ammonia Slip Catalyst


    Additional title:

    Sae Technical Papers


    Contributors:

    Conference:

    WCX™ 17: SAE World Congress Experience ; 2017



    Publication date :

    2017-03-28




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




    Real Driving Emission Efficiency Potential of SDPF Systems without an Ammonia Slip Catalyst

    Georgiadis, Evangelos / Kudo, Toru / Herrmann, Olaf et al. | British Library Conference Proceedings | 2017


    AMMONIA SLIP CATALYST

    FEDEJKO DZHOZEF MAJKL / DOURA KEVIN / VAJGERT ERIKH KONLAN et al. | European Patent Office | 2018

    Free access

    Investigations of SDPF-diesel particle filter with SCR coating for heavy duty applications

    Czerwinski,J. / Zimmerli,Y. / Mayer,A. et al. | Automotive engineering | 2015


    Investigations of SDPF -Diesel Particle Filter with SCR Coating for HD-Applications

    Czerwinski, Jan / Zimmerli, Yan / Mayer, Andreas et al. | British Library Conference Proceedings | 2015


    Laboratory sulfation of an ammonia slip catalyst with a real-world SO2 concentration

    Kiani, Daniyal / Ottinger, Nathan / Xi, Yuanzhou et al. | SAE Technical Papers | 2023