Pilot Study of Gas Engines Using GR and G25 Natural Gas
Two types of gas engines with EQ+EGR+TWC and EQ+TWC as the technical route were chosen as the research objects,using GR and G25 as fuel,the cold and hot state WHTC tests were carried out,and the comparison between two fuels of gas engine under the same technical route and two different technical routes of gas engine using the same fuel were carried out.The results show that the gas consumption in the cold state is greater than that in the hot state,the normal emission values of NOx and CH4 in the cold state are grea-ter than that in the hot state,the original emission of the gas engine has no NH3 emission,the NH3 emission is produced when the TWC is converted to the original exhaust,and the NH3 emission in the cold state of WHTC is less than that in the hot state.The combustion pressure and temperature of gas engine using G25 are lower than those using GR,and the original NOx emission of G25 is lower than that of GR.
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