The Influence of Intake Atmosphere on Gasoline/PolyMethoxy Dimethyl Ether Combustion
In order to realize the RCCI high-efficiency and clean combustion of Gasoline-Polymethoxy Dimethyl Ether dual-fuel engine,CONVERGE was used to establish a simulation model to study the influence of different intake air temperature and intake pressure on emissions and combustion.The research results have shown that the increase of intake pressure will advance the combustion phase,and the peak heat release rate will increase first and then decrease;with the increase of intake air temperature,the combustion phase will advance,the peak heat release rate will increase,and the combustion duration will be shorter,and when the intake air temperature is greater than or equal to 330K,the heat release rate curve presents a double peak.When the in-take pressure is increased to 240kPa,the maximum load can be expanded to 1.63MPa IMEP,but at this time,the production of the four pollutants is higher.When the intake pressure is 220kPa,although NOx emissions have increased,the emissions of other pollutants are lower.When the intake air temperature is(320～330)K,the power and economy are the best,and the pollutant emis-sion is at a relatively low level.
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