This paper describes an alternative catalyst aging process using a hot gas test stand for thermal aging. The solution presented is characterized by a burner technology that is combined with a combustion enhancement, which allows stoichiometric and rich operating conditions to simulate engine exhaust gases. The resulting efficiency was increased and the operation limits were broadened, compared to combustion engines that are typically used for catalyst aging. The primary modification that enabled this achievement was the recirculation of exhaust gas downstream from catalyst back to the burner. The burner allows the running simplified dynamic durability cycles, which are the standard bench cycle that is defined by the legislation as alternative aging procedure and the fuel shut-off simulation cycle ZDAKW. The hot gas test stand approach has been compared to the conventional engine test bench method. Comparisons of catalysts aged on the hot gas bench and an engine dynamometer showed similar results within the tolerance band. An urban driving cycle was also run on the test bench with a diesel exhaust system that included a particulate filter working in regeneration mode. The drive cycle simulation on the test bench was able to provide an exhaust gas temperature profile within the catalyst, which represented the same thermal load as in the vehicle. The aging progress was monitored by a dynamic light-off measurement procedure. The capability to produce heavily aged three-way catalysts on the test bench down to the OBD limit was also investigated. The profile of catalyst damage and the resulting effect on oxygen storage capacity and emissions, could be varied by adjusting the bench aging parameters.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Catalyst Aging Method for Future Emissions Standard Requirements


    Additional title:

    Sae Technical Papers


    Contributors:

    Conference:

    SAE 2010 World Congress & Exhibition ; 2010



    Publication date :

    2010-04-12




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




    Catalyst aging method for future emissions standard requirements

    Ruetten,O. / Pischinger,S. / Kuepper,C. et al. | Automotive engineering | 2010


    2010-01-1272 Catalyst Aging Method for Future Emissions Standard Requirements

    Ruetten, O. / Pischinger, S. / Kupper, C. et al. | British Library Conference Proceedings | 2010


    Development of advanced platinum-rhodium catalyst for future emissions requirements

    Brisley,R.J. / Collins,N.R. / French,C. et al. | Automotive engineering | 1999


    Development of Advanced Platinum-Rhodium Catalyst for Future Emissions Requirements

    Brisley, R. J. / Collins, N. R. / French, C. et al. | British Library Conference Proceedings | 1999


    Development of Advanced Platinum-Rhodium Catalyst for Future Emissions Requirements

    French, C. / Morris, D. / Twigg, M. V. et al. | SAE Technical Papers | 1999