Effect of Bio-Additives on Gasoline Fuel Economy and Exhaust Emissions

One bio-additive extracted from a tropic plant can be taken as a gasoline additive.The bio-additive is added into the super-clean gasolines with 93 octane number and ethanol-gasoline respectively.Through engine bench tests,the fuel economy and emission quality with and without the bio-additive were compared and analyzed.The results showed that when the engine used the fuel added with the bio-additive,the fuel economies of all kinds of gasoline were improved remarkably,especially for ethanol-gasoline.With the bio-additive,the fuel economy of ethanol-gasoline can be matched with almost the same level of the normal gasolines without ethanol.For all kinds of super-clean gasolines with 93 octane number added with the additive,the engine emissions like carbon monoxide(CO)and nitric oxide(NOx)were reduced,only with the excepion of unburned hydrocarbon(HC)which is increased slightly.What's more,the bio-additive shows its remarkable characteristic that can decrease CO2 emissions from gasoline engines.For the ethanol-gasoline,when adding the bio-additive,the HC and CO2 have been increased slightly when compared with the basic fuel.