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- W2348187892 abstract "Comparing with single fuel injection,the superiority of multi-injection combined with high exhaust gas recirculation(EGR)rate and intake boost in reducing emissions and increasing indicated thermal efficiency of diesel premixed charge compression ignition(PCCI)combustion is studied experimentally and numerically.It is found that EGR can delay the start of hot temperature reactions,reduce the reaction speed at higher load.EGR can also reduce NOx emissions.There are no significant differences in emissions and indicated thermal efficiency using single and multi-injection at IMEP around 0.4 MPa due to the small quantity of the fuel injected,and the mixture formed just before ignition distributes within φ2.At approximately 10% oxygen concentration,when increasing the fuel mass injected,more fuel will enter the side clearance,where rich mixture with φ2 is formed.As a result,the soot,CO and UHC emissions are increased using both injection modes.However,at IMEP of 0.7 MPa around,CO and UHC emissions using multi-injection are much lower than those using single injection.The mechanism is that,more lean and homogenous mixture is formed and the amount of the local rich mixture is reduced using multi-injection.At high EGR rate,combined multi-injection with increasing boost pressure,the mixture formed is further improved,high efficiency and low emissions are simultaneously achieved at higher engine load." @default.
- W2348187892 created "2016-06-24" @default.
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- W2348187892 date "2012-01-01" @default.
- W2348187892 modified "2023-09-23" @default.
- W2348187892 title "Mechanism of Multiple Injections on Clean and High Efficiency Diesel PCCI Combustion" @default.
- W2348187892 hasPublicationYear "2012" @default.
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