This content is not included in your SAE MOBILUS subscription, or you are not logged in.
Real Driving Emission Efficiency Potential of SDPF Systems without an Ammonia Slip Catalyst
ISSN: 0148-7191, e-ISSN: 2688-3627
Published March 28, 2017 by SAE International in United States
Annotation ability available
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.
CitationGeorgiadis, E., Kudo, T., Herrmann, O., Uchiyama, K. et al., "Real Driving Emission Efficiency Potential of SDPF Systems without an Ammonia Slip Catalyst," SAE Technical Paper 2017-01-0913, 2017, https://doi.org/10.4271/2017-01-0913.
- Vehicle Emissions Testing Programme Department for Transport United Kingdom April 2016
- Mock Peter A midsummer night’s skullduggery http://www.theicct.org/blogs/staff/midsummer-nights-skullduggery The International Council on Clean Transportation (ICCT) July 2013
- Lefebvre Luc (M.Sc. Toxicologue Direction de santé publique de Montréal) and Sebez Slavko (M. Sc. Direction régionale de santé publique de la Capitale-Nationale) Les risques à la santé associés à l’utilisation des réfrigérants dans les systèmes de réfrigération des arénas et centres de curling Agence de la santé et des services sociaux de la capitale-Nationale / Agence de la santé et des services sociaux de Montréal 10 September 2013
- Lefebvre Luc Les effets sur la santé de l’ammoniac Direction de santé publique de Montréal 15 Mars 2007
- Munnannur , A. , Cremeens , C. , and Liu , Z. Development of Flow Uniformity Indices for Performance Evaluation of Aftertreatment Systems SAE Int. J. Engines 4 1 1545 1555 2011 10.4271/2011-01-1239
- Herrmann O. E. Emissionsregelung bei Nutzfahrzeugmotoren über den Luft- und Abgaspfad Phd dissertation Aachen, Germany 2005