In order to study the effect of different blend fuels on vehicle performance

five test fuels with different olefin and aromatic hydrocarbon characteristics were prepared from 4 kinds of 10% in volume ethanol gasoline and a pure gasoline

and emission test were conducted with a gasoline direct injection(GDI) supercharged passenger vehicle. The test results show that when the vehicle runs according to the new European driving cycle(NEDC)

the use of ethanol gasoline blend fuels will increase the fuel consumption per 100 kilometers of the vehicle

but its equivalent fuel consumption may be lower than the pure gasoline operation

which indicates that the use of ethanol gasoline blend fuels leads to increased thermal efficiency

reduced particulate emissions and good vehicle acceleration performance. As far as physiochemical properties concerned

an increase in the content of aromatics will cause the vehicles fuel consumption

particle numbers(PN) and NOx emissions to rise continuously. In terms of the overall performance of the vehicle

an efficient and clean operation of ethanol gasoline blend fuels can be achieved through fuel optimization. However

compared with pure gasoline operation

the use of ethanol gasoline blend fuels has higher CO and lower HC emissions under low speed and cold start conditions due to a lower engine operating temperature.