Within the next decade, all light-duty vehicles in the United States will be required to meet Tier 2 or LEV 2 tailpipe emission standards. As emission standards have tightened over time catalyst systems have increased in cost. The factors that have contributed to the growth in cost include increases in both precious metal content and catalyst volumes. Calibration strategy, catalyst, and substrate technology improvements have also enabled previous emission standards to be met. The recent dramatic fluctuations in precious metal price, coupled with the increasing desire to reduce system cost, have led catalyst companies to develop converter technologies containing decreasing amounts of precious metal, and still meet Tier2/LEV2 standards.In this paper the development of a novel, near base metal, catalyst technology is described. The effects of precious metal support type and catalyst preparation method are reported using model engine bench and vehicle tests. The application of this novel catalyst technology to a LEV2 light duty truck is then detailed. The effects of underbody and close coupled precious metal load were studied. Data demonstrating the performance of this catalyst in low volume (85% ESV), and low precious metal loading, systems is described. LEV2 emission standards are met on a fully aged system with less than 2g of precious metal.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Development and System Application of an Ultra Low Loaded Precious Metal Catalyst Technology on LEV2 Vehicles


    Additional title:

    Sae Technical Papers


    Contributors:

    Conference:

    SAE 2004 World Congress & Exhibition ; 2004



    Publication date :

    2004-03-08




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




    Development and System Application of an Ultra Low Loaded Precious Metal Catalyst Technology on LEV2 Vehicles

    Andersen, P. J. / Ballinger, T. H. / Bennett, C. J. et al. | British Library Conference Proceedings | 2004


    2004-01-1271 Development and System Application of an Ultra Low Loaded Precious Metal Catalyst Technology on LEV2 Vehicles

    Andersen, P. J. / Ballinger, T. H. / Bennett, C. J. et al. | British Library Conference Proceedings | 2004


    Development of Ultra Fine precious metal catalyst

    Nakamura, M. / Suga, K. / Sekiba, T. et al. | British Library Conference Proceedings | 2008


    Development and system application of an ultra low loaded previous metal catalyst technology on LEV2 vehicles

    Andersen,P.J. / Ballinger,T.H. / Bennett,C.J. et al. | Automotive engineering | 2004


    Development of Advanced and Low PGM TWC System for LEV2 PZ EV and LEV3 SULEV30

    Matsuzono, Y. / kuroki, K. / Nishi, T. et al. | British Library Conference Proceedings | 2012