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燃料化学学报 2006
Influence of MTBE addition into gasoline on emission performance of a EFI gasoline engine
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Abstract:
The effect of methyl-tert-butyl ether(MTBE) addition into gasoline on the exhaust emissions from EFI gasoline engine was studied.A four-cylinder HL495IQ engine was used in the experiments.Fuels containing 0,5%,10%,15%,20% MTBE were used in the engine operations,and the exhaust gases were analyzed for CO,HC and NO_x,before and after their catalytic treatment by a three-way catalytic converter.The addition of MTBE into gasoline resulted in a decrease in CO,THC and NO_x emissions only at low speed or light loading.No obvious effect were observed at other conditions.Catalytic conversion efficiencies of CO and THC were inproved to 70% and 99% respectively.But the catalytic conversion rate of NO_x only reached 12%~55%.The efficiency of catalytic converter had relations to speed,load of the engine and the MTBE content in the blended fuels.