Research Article

Study on Premixed Combustion in a Diesel Engine with Ultra-multihole Nozzle

Table 7

Engine performance comparison between premixed combustion and original engine.

Operating conditionCombustion wayEGR rate %Excess air coefficient
λ
Boost Pressure kPaInjection pressure MPaInjection starting point
°CA ATDC
Soot g/kW·hNOx g/kW·hHC g/kW·hCO g/kW·hBSFC g/kW·hCA50
 °CA

AConventional combustion04.416.35000.01036.729.2129.71400.515.45−1.2
Premixed combustion802.81090−1.50.00593.1014.8556.44402.016.25.1

BConventional combustion03.59.45000.01037.281.056.20262.216.35−3.3
Premixed combustion801.680110−1.50.00121.495.0821.23274.817.874.1

CConventional combustion02.75135000.02896.890.472.31246.516.3−5.1
Premixed combustion671.41.612000.00991.173.7919.67263.020.33.4

DConventional combustion02.2540.275−20.05588.970.581.46243.919.0−6.8
Premixed combustion281.4131.411030.02912.051.3614.19261.220.950.3