It has become evident that almost all diesel aftertreatment devices dealing with NOx and particulate matter (PM) controls require the addition of one or more reducing agents (reductants), such as diesel fuel, ammonia, or aqueous urea to enhance their efficiency and durability. These reductants can be used to catalytically convert NOx to N2, to enrich the air fuel ratio (A/F), or to increase temperatures for regenerating PM filters or for de-sulfating NOx traps. A number of injection methods have been developed recently to provide easy reductant addition. However, many of them may be cumbersome, costly, or ineffective. This paper describes a new reductant delivery system, which appears to minimize these shortcomings.To be effective, the manner of reductant injection into the exhaust is critical. First, the reductant must be added quickly to accommodate the fast transient operations. Secondly, precisely measured quantities of reductant must be added to match the NOx levels or to achieve the desired temperature or A/F. Thirdly, the reductant must be finely dispersed to allow effective utilization on catalytic surfaces. In addition, the delivery system must withstand the harsh environment of high temperature and high PM emissions of the diesel exhaust. The newly developed on-board reductant delivery system, which comprises only three components, not only achieves the above criteria, but also offers simplicity, compactness, light weight, high energy efficiency, excellent durability, and low cost.


    Zugriff

    Zugriff prüfen

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    An On-Board Reductant Delivery System for Diesel Aftertreatment


    Weitere Titelangaben:

    Sae Technical Papers


    Beteiligte:

    Kongress:

    Spring Fuels & Lubricants Meeting & Exhibition ; 2002



    Erscheinungsdatum :

    24.09.2001




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




    An On-Board Reductant Delivery System for Diesel Aftertreatment

    Wu, C.-H. / Hammerle, R. / Society of Automotive Engineers | British Library Conference Proceedings | 2001


    An on-board reductant delivery system for diesel aftertreatment

    Wu,C.H. / Hammerle,R. / Ford Motor,US | Kraftfahrwesen | 2001


    Insulation assembly for reductant delivery system for exhaust gas aftertreatment system

    JAMES M O'ROURKE / MATTHEW ROBERT ENNISS | Europäisches Patentamt | 2020

    Freier Zugriff

    Exhaust gas and reductant mixer for an aftertreatment system

    Europäisches Patentamt | 2022

    Freier Zugriff

    Diesel aftertreatment

    International Fall Fuels and Lubricants Meeting and Exposition | TIBKAT | 2000