A turbocharged lean burn natural gas engine was upgraded to operate on a blend of hydrogen and natural gas (HCNG). Tests were carried out to determine the most suitable H2/NG blend for H2 fractions between 20 and 32 vol%. A 20 vol% H2 content was found to provide the desired benefits when taking into consideration the engine and vehicle performance attributes. A full engine map was developed for the chosen mixture, and was verified over the steady-state AVL8 cycle. In general, the HCNG calibration included operation at higher air-fuel ratios and retarded spark timings. The results indicated that the NOx and NMHC emissions were reduced by 50% and 58% respectively, while the CO and CH4 emissions were slightly reduced. The HCNG engine torque, power and fuel consumption were maintained the same as for the natural gas fuel. The chassis dynamometer transient testing confirmed large NOx reduction of about 56% for HCNG operation. The buses have successfully completed the 24,000 miles field trials and their performance was found very satisfactory.


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    Titel :

    Hydrogen Blended Natural Gas Operation of a Heavy Duty Turbocharged Lean Burn Spark Ignition Engine


    Weitere Titelangaben:

    Sae Technical Papers


    Beteiligte:
    Nedelcu, C. (Autor:in) / Lynch, F. (Autor:in) / Dixon, G. (Autor:in) / Harris, J. (Autor:in) / Williams, J. (Autor:in) / Frailey, M. (Autor:in) / Nine, R. (Autor:in) / Wayne, S. (Autor:in) / Munshi, S. R. (Autor:in) / Edwards, T. (Autor:in)

    Kongress:

    2004 Powertrain & Fluid Systems Conference & Exhibition ; 2004



    Erscheinungsdatum :

    25.10.2004




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




    Hydrogen blended natural gas operation of a heavy duty turbocharged lean burn spark ignition engine

    Munshi,S.R. / Nedelcu,C. / harris,J. et al. | Kraftfahrwesen | 2004


    Improved Spark Ignition Engine Efficiency through Lean Turbocharged Operation

    Schmid, K. R. / Johnson, R. T. | SAE Technical Papers | 1983


    Improved Spark Ignition Engine Efficiency through Lean Turbocharged Operation

    Johnson,R.T. / Schmid,K.R. / Univ.of Missouri Rolla,Mech.Engng.Dep.,US | Kraftfahrwesen | 1983