TY - JOUR
T1 - Effect of Various Diesel Injection Tunings on Combustion, Efficiency and Emissions by Using the Double-row Nozzle with Narrow and Wide angles in a 6 L Diesel Engine
AU - Oh, Sechul
AU - Oh, Junho
AU - Jang, Hyeongjun
AU - Lee, Seokhwan
AU - Lee, Sunyoup
AU - Kim, Changgi
AU - Lee, Jeongwoo
N1 - Publisher Copyright:
Copyright © 2023 KSAE.
PY - 2023/1
Y1 - 2023/1
N2 - It is important to make better premixed combustion engines to reduce harmful engine emissions, such as nitrogen oxides(NOx) and smoke, by enhancing thermal efficiency in the internal combustion engines(ICEs). Specifically, since diesel compression ignition(CI) engines are based on the auto-ignition function of diesel fuel in the co-existence of some premixed combustion and most of diffusive flame, homogeneity between air and fuel must be improved. To solve this problem, multi-holes and narrow injection angles for the diesel injector are recommended. If the number of holes in the injector is increased, it could help air utilization and shorten diesel spray penetration. Also, a narrow injection angle could help reduce wall impingement of the diesel spray, when the diesel injection timing is advanced, compared to conventional conditions. Therefore, in this research, the effect of a double-row nozzle was verified in a 6 L diesel engine under low load condition by varying the diesel injection timings from top dead center(TDC) to 70 ° before TDC(BTDC) in the intervals of 10 degrees. All the results were compared with original single-row nozzle cases. The result emphasized that the benefits of a double-row nozzle on reducing NOx and smoke improved thermal efficiency under premixed combustion regimes when diesel injection timing was advanced earlier than 40° BTDC.
AB - It is important to make better premixed combustion engines to reduce harmful engine emissions, such as nitrogen oxides(NOx) and smoke, by enhancing thermal efficiency in the internal combustion engines(ICEs). Specifically, since diesel compression ignition(CI) engines are based on the auto-ignition function of diesel fuel in the co-existence of some premixed combustion and most of diffusive flame, homogeneity between air and fuel must be improved. To solve this problem, multi-holes and narrow injection angles for the diesel injector are recommended. If the number of holes in the injector is increased, it could help air utilization and shorten diesel spray penetration. Also, a narrow injection angle could help reduce wall impingement of the diesel spray, when the diesel injection timing is advanced, compared to conventional conditions. Therefore, in this research, the effect of a double-row nozzle was verified in a 6 L diesel engine under low load condition by varying the diesel injection timings from top dead center(TDC) to 70 ° before TDC(BTDC) in the intervals of 10 degrees. All the results were compared with original single-row nozzle cases. The result emphasized that the benefits of a double-row nozzle on reducing NOx and smoke improved thermal efficiency under premixed combustion regimes when diesel injection timing was advanced earlier than 40° BTDC.
KW - Brake thermal efficiency
KW - Compression ignition
KW - Diesel injection timing
KW - Double-row nozzle
KW - Narrow angle nozzle
KW - Nitrogen oxides
UR - http://www.scopus.com/inward/record.url?scp=85148018583&partnerID=8YFLogxK
U2 - 10.7467/KSAE.2023.31.1.061
DO - 10.7467/KSAE.2023.31.1.061
M3 - Article
AN - SCOPUS:85148018583
SN - 1225-6382
VL - 31
SP - 61
EP - 70
JO - Transactions of the Korean Society of Automotive Engineers
JF - Transactions of the Korean Society of Automotive Engineers
IS - 1
ER -