Common Rail diesel fuel injection technology faces interesting perspectives outside Europe, the traditional market for Diesel passenger vehicles. As a consequence, the modern diesel engine will have to operate in extremely diverse markets with varying requirements in terms of emission legislation levels, fuel quality and customer expectations. This paper focuses on the challenges related to fuel variability. Today we face two opposing sets of requirements. On one side, the introduction of existing diesel technology in emerging countries with challenging levels of consistency of key fuel characteristics, on the other, the launch of new and sophisticated technology in Europe and the USA with extremely low emission limits. An additional degree of freedom is related to the advent and expectations of bio-fuels worldwide. In this context the authors will show how the core components, including filter technology, are developed and adapted to ensure optimal behaviour under these severe conditions. Finally, the authors will provide an outlook of how the diesel technology will be impacted by next generation fuels. Diesel fuel quality is affected by crude oil type and the refinery processes used during production. Fuel quality issues are often more critical in those areas where advanced emission requirements have not yet been implemented. Indeed, many fuels specification changes have been driven by the need to assist vehicle and equipment manufacturers in meeting emissions legislation. Fuel quality, particularly stability, particulates and moisture content is also sensitive to the practices used during storage and distribution. As a result, reliance on the fuel specifications for each geographical area is not enough to ensure development of a robust fuel injection system. Instead, these need to be complemented with laboratory analysis performed on fuel samples collected from around the globe representing 'real world' fuel characteristics. An additional degree of complexity is now being added by the introduction of renewable and environmentally friendly fuels. The fuel filter is an important component of the fuel injection systems because it removes abnormal fuel contaminants before they get to the engine. As fuel contamination is a fact of life, the objective of filter design is to provide the best filtration efficiency by complying with customer packaging requirements. The filter efficiency needs to be adapted to the region of operation. Future developments in injection system design are expected to compliment the ongoing evolution in fuel composition. For example, conventional nozzle flow area and geometry is chosen as a compromise between the specific requirements of power, consumption, emissions and noise over the operating range of the engine. The additional freedom given by a variable nozzle area eases this constraint.


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    Titel :

    The challenges of worldwide fuels on modern Diesel common rail systems


    Weitere Titelangaben:

    Herausforderungen an moderne Common Rail Einspritzsysteme beim Einsatz weltweiter Kraftstoffe


    Beteiligte:
    Schoeppe, Detlev (Autor:in) / Hardouin, Ghislain (Autor:in) / Monnier, Franck (Autor:in) / Lacey, Paul (Autor:in) / Lafon, Vincent (Autor:in) / Rossi, Anna (Autor:in) / Orlovic, Aleksandar (Autor:in) / Zuelch, Stefan (Autor:in)


    Erscheinungsdatum :

    2007


    Format / Umfang :

    19 Seiten, 10 Bilder, 3 Tabellen, 8 Quellen


    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




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