Spark ignition engine performance, standard emissions and particulates using GDI, PFI-CNG and DI-CNG systems
نویسندگان
چکیده
Gaseous fuels, e.g., natural gas, biogas, have several advantages over liquid fuels owing to their favorable physical and chemical properties, lower carbon numbers in the fuel composition no issues regarding evaporation. The present study investigated compressed gas (CNG) port injection (PFI) direct (DI) systems compared gasoline (GDI) cases a spark ignition (SI) naturally aspirated single cylinder engine at stoichiometric conditions. tests included usual working points – from 4.5 bar IMEP 9 load different speeds 1500 rpm 2500 rpm. main aim was investigate how gaseous can improve SI efficiency, reduce standard emissions particulates, explain benefits of DI system versus PFI GDI systems. Analysis results showed that rate heat release than fuel. However, stable combustion process DI-CNG gave additional benefits, increased turbulence cylinder, which affected exhaust formation. highest efficiency achieved with same system. iSHC, iSCO, iSCO2 iSNOx reduction low part conditions combustion. Particulates formation gasoline. Additional particulate among three were observed
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ژورنال
عنوان ژورنال: Fuel
سال: 2021
ISSN: ['0016-2361', '1873-7153']
DOI: https://doi.org/10.1016/j.fuel.2021.120454