Prior research studies have investigated a wide variety of gasoline compression ignition (GCI) injection strategies and the resulting fuel stratification levels to maintain control over the combustion phasing, duration, and heat release rate. Previous GCI research at the US Department of Energy’s Oak Ridge National Laboratory has shown that for a combustion mode with a low degree of fuel stratification, called “partial fuel stratification” (PFS), gasoline range fuels with anti-knock index values in the range of regular-grade gasoline (~87 anti-knock index or higher) provides very little controllability over the timing of combustion without significant boost pressures. On the contrary, heavy fuel stratification (HFS) provides control over combustion phasing but has challenges achieving low temperature combustion operation, which has the benefits of low NOX and soot emissions, because of the air handling burdens associated with the required high exhaust gas recirculation rates. This work investigates HFS and PFS combustion, efficiency, and emissions performance on a single-cylinder, medium-duty engine with a regular-grade gasoline (91 research octane number) at 1,200 rpm, 4.3 bar, and 3.0 nominal gross indicated mean effective pressure operating points with boost levels similar to those in a medium-duty diesel application. Authority of combustion phasing with main injection timing sweeps for HFS and second injection timing sweeps and fuel split sweeps for PFS are shown. In addition, this work is discussed in the context of previous findings with a light-duty diesel platform, and next steps and future direction for this work are presented1.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Fuel Stratification Effects on Gasoline Compression Ignition with a Regular-Grade Gasoline on a Single-Cylinder Medium-Duty Diesel Engine at Low Load


    Additional title:

    Sae Int. J. Adv. and Curr. Prac. in Mobility


    Contributors:

    Conference:

    SAE Powertrains, Fuels & Lubricants Digital Summit ; 2021



    Publication date :

    2021-09-21


    Size :

    14 pages




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English






    Investigation of Gasoline Compression Ignition (GCI) Combustion in a High Compression-Ratio Heavy-duty Single-Cylinder Diesel Engine

    Cung, Khanh / Bitsis, Daniel Christopher / Miwa, Jason et al. | British Library Conference Proceedings | 2021


    Investigation of Gasoline Compression Ignition (GCI) Combustion in a High Compression-Ratio Heavy-duty Single-Cylinder Diesel Engine

    Moiz, Ahmed Abdul / Michlberger, Alexander / Morris, Andrew et al. | SAE Technical Papers | 2021


    Influence of Engine Speed on Gasoline Compression Ignition (GCI) Combustion in a Single-Cylinder Light-Duty Diesel Engine

    Hawkes, Evatt / Goyal, Harsh / Chan, Qing Nian et al. | SAE Technical Papers | 2017