The impact of fuel and injection strategy on combustion characteristics, emissions and efficiency in gasoline compression ignition operation
نویسندگان
چکیده
Gasoline compression ignition in diesel engines has been proposed order to meet increasingly stringent emission regulations without sacrificing efficiency. In this study, a six-cylinder heavy-duty engine was operated mixing controlled gasoline mode investigate the influence of fuels and injection strategies on combustion characteristics, emissions, thermal efficiencies. Fuels, including ethanol (E), isobutanol (IB), diisobutylene (DIB), were blended with fuel form E10, E30, IB30, DIB30 based volumetric fraction. These four blends along formed five test fuels. With these fuels, three injections investigated, late pilot injection, early port injection/direct injection. The impact moderate exhaust gas recirculation nitrogen oxides soot emissions examined determine most promising fuel/injection strategy for reduction. addition, first second law analyses performed provide insights into efficiency, loss, exergy destruction various at low medium load conditions. Overall, output, performances found be similar their differences are modest under E30 port/direct obtained peak brake efficiency (46.9%) gross indicated (52.2%) 14 bar. At 7 bar, (44.2%) (52.5%) also belonged strategy. analysis revealed that mostly influenced by type not bar operating However, opposite trend observed case. combination oxygenated helpful suppress operation recirculation.
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ژورنال
عنوان ژورنال: Fuel
سال: 2022
ISSN: ['0016-2361', '1873-7153']
DOI: https://doi.org/10.1016/j.fuel.2022.123548