A new 3-way catalyst with NOx conversion performance for lean-burn engines has been developed. The catalyst oxidizes NOx and stores the resulting nitrate, which is then reduced by HC and CO during engine operation around the stoichiometric air/fuel ratio. Both the composition of the storage component and the particle sizes of the noble metal were optimized. In addition, a special air fuel mixture control has been developed to make the best of the NOx storage-reduction function. The present catalyst showed 90% conversion efficiency and improved fuel economy by 4% in the Japanese 10-15 mode test cycle. The efficiency remained at 60% or more after durability test.


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    Titel :

    Development of New Concept Three-Way Catalyst for Automotive Lean-Burn Engines


    Weitere Titelangaben:

    Sae Technical Papers


    Beteiligte:
    Harada, Jun (Autor:in) / Katoh, Kenji (Autor:in) / Yokota, Koji (Autor:in) / Kasahara, Kouichi (Autor:in) / Sugiura, Masahiro (Autor:in) / Takahashi, Naoki (Autor:in) / Miyoshi, Naoto (Autor:in) / Matsumoto, Shin'ichi (Autor:in) / Tanaka, Toshiaki (Autor:in)

    Kongress:

    International Congress & Exposition ; 1995



    Erscheinungsdatum :

    01.02.1995




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




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