Secondary fuel injection is applied to facilitate active soot management of the particulate filter within diesel aftertreatment systems, avoiding concerns with fuel delivery via in-cylinder post-injection. System performance is dependent on the thermo-fluid interactions of the injected fuel with the exhaust stream, with the intent of having more fully vaporized fuel and a well-mixed air-fuel mixture at the inlet of the oxidation catalyst for uniform thermal distribution as it exothermically reacts. Pre-heating the fuel with a diesel vaporizer prior to its delivery into the exhaust enables improved system performance, reducing droplet sizes and mixing demands. A diesel vaporizer is applied within the exhaust of a medium duty truck application, and the response of the catalyst is characterized across a variety of conditions. Cross-sectional measurements at the catalyst and filter outlet are described, including gas velocity, temperature, and HC concentration, and the effect of poor fuel vaporization is demonstrated. The system is installed in a medium-duty truck with a 4.8L engine and characterized on a chassis dynamometer across various steady-state and transient conditions. Performance is measured while applying closed loop fuel dosing control algorithms, demonstrating control capabilities similar to injectors. Adequate thermal distribution is achieved with minimal HC slip, and recommendations are offered to further demonstrate system integration benefits and risks of diesel vaporizers.


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    Titel :

    Secondary Fuel Injection Characterization of a Diesel Vaporizer for Active DPF Regeneration


    Weitere Titelangaben:

    Sae Int. J. Engines


    Beteiligte:
    Kotrba, Adam (Autor:in) / Bright, Andrew (Autor:in) / Hein, Eric (Autor:in) / Inclan, Tobias (Autor:in)

    Kongress:

    SAE 2014 World Congress & Exhibition ; 2014


    Erschienen in:

    Erscheinungsdatum :

    01.04.2014


    Format / Umfang :

    7 pages




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




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    Amon, Bernd / Alano, Eduardo / Jean, Emmanuel | SAE Technical Papers | 2010


    Simulation of Catalyzed Diesel Particulate Filter for Active Regeneration Process Using Secondary Fuel Injection

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    Fuel vaporizer: alternative solution for DPF regeneration

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    Simulation of Catalyzed Diesel Particulate Filter for Active Regeneration Process Using Secondary Fuel Injection

    Abdalla, Aniseh / Wang, Guoyang / Zhang, Jun et al. | British Library Conference Proceedings | 2017