不同烃族组分柴油对压燃式内燃机燃烧和排放的影响

The test was conducted on a 6-cylinder four stroke, turbocharged and intercooled heavy-duty diesel engine that met the China VI emission standards. In this experiment, based on Chambroad Petrochemical diesel, the design and preparation of diesel with different hydrocarbon group compositions (alkanes, cycloalkanes, and aromatics) were carried out according to the currently available China VI diesel fuel, Beijing 6b diesel fuel, and world fuel standards or recommended values. While maintaining consistent engine conditions, the impacts on the performance of diesel engines were studied. The fuel prepared in the experiment met the Beijing 6b standard. The results showed that the six Chambroad test fuels had little difference in the combustion process in the cylinder compared to the commercially available 0 # and -20 # diesel, and B1 # and B5 # had greater effectiveness in the effective work. B1 #, B3 #, and B6 # test fuels had the better stability. Under the full load operating conditions, in the first part, the quality fuel consumption of -20 # diesel fuel was the lowest, while the volume fuel consumption of B2 # test fuel was the lowest, with a maximum decrease of 1.3% compared to -20 # diesel fuel. In the second part, B5 # test fuel had the lowest quality fuel consumption, with a maximum decrease of 1.7%. In terms of volumetric fuel consumption, 0 # diesel fuel was the lowest. Under the WHSC test cycle, the effective fuel consumption of B5 # and B6 # were relatively low, with decreases of 0.49% and 0.19% compared with 0 # diesel fuel, respectively. In terms of emissions, the weighted NOx emissions of B4 # and B6 # were relatively low, with a maximum decrease of 9.62%. The soot emissions of B5 # were relatively low, with a decrease of 22.73% compared to 0 #. Under the constant speed test cycle, the effective fuel consumption of B5 # and B6 # were relatively low, with a maximum decrease of 1.39%. The weighted NOx emissions of B5 # and B6 # were relatively low, with a maximum decrease of 8.09%. The weighted soot emissions of B1 # and B4 # were relatively low, with a decrease of 34.64% and 36.36%, respectively.