In response to the 1998 promulgation of locomotive emissions regulations (effective in 2000) by the United States Environmental Protection Agency (EPA), GE embarked on the development of the GEVO engine. This new engine platform was developed to address future emissions requirements of the US EPA and other regulatory agencies as well as address customer requirements for high reliability and low operating cost. With over 2000 Tier 2 Evolution Series Locomotives delivered since being launched in 2005, the GEVO engine has proven to be a very reliable and efficient product. Designed to meet Tier 2 emissions, the performance of this highly successful engine has recently been extended to meet US EPA Tier 3 Locomotive Emission requirements. Through a combination of improved injection strategies, reduced lube oil consumption and improved air handling, a 50% reduction in particulate matter has been demonstrated, while holding NO(x) emissions constant and without a negative affect on fuel economy. The PM reduction was achieved through a combination of lube oil consumption reduction and injection control strategies. The oil consumption reduction was accomplished through the employment of a more aggressive piston ring pack and liner surface finish optimization. To quantify the impact of various power assembly design features and down select to the final power assembly configuration, an instantaneous lube oil consumption measurement system was employed. This system yielded significant insight into the oil transport mechanisms associated with different operating conditions (i.e., low load, transient and high load). Further reductions in particulate emissions were achieved by implementing a new high pressure, common rail fuel injection system that enabled greater flexibility in the scheduling of fuel injection and control of injection pressure. Specific fuel consumptions penalties were offset through a combination of turbocharger efficiency improvements, the adoption of early intake valve closure and optimization of injection strategies. The final configuration was validated through extensive test bed and field endurance testing. This paper will discuss the development process and design features of GE's next generation diesel locomotive engine.


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    Titel :

    Design and development of the GE Tier 3 locomotive diesel engine


    Beteiligte:
    Blythe, Neil X. (Autor:in) / Glenn, W. Doug (Autor:in)


    Erscheinungsdatum :

    2010


    Format / Umfang :

    9 Seiten, 16 Bilder, 10 Quellen


    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Datenträger


    Sprache :

    Englisch




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