STUDY ON EFFECTS OF E5RON95 AND E10RON95 FUELS ON PERFORMANCE AND EMISSIONS OF A PASSENGER CAR

Abstract

Gasoline-ethanol blends have been widely used in many countries around the world to reduce dependence on fossil fuels and reduce environmental pollution. Along
with that trend, in Vietnam, E5RON92 has replaced conventional gasoline RON92, and has been distributed widely since 2018, in parallel with gasoline RON95. However,
E5RON92 which has Octane value of 92, is only used for old vehicles, but not suitable for high compression ratio engine of new vehicles. Therefore, the share of E5RON92
consumption is still small as compared to that of gasoline RON95, then the advantages of gasoline-ethanol blend have not been shown clearly in large scale. In order to
expand the use of gasoline-ethanol blends for high compression ratio vehicles, this paper evaluates the effects of E5RON95 and E10RON95 on performance and emissions of
an 11,5-compression ratio passenger car manufactured in 2015. The test was carried out on a chassis dyno test bench at steady speed, acceleration and idling modes.
Compared with gasoline RON95, on average at full load, the maximum power at wheel of the vehicle increased by 3.7% and 5.9%, the fuel consumption reduced by 3,6%
and 2.4%, HC decreased by 21.7% and 30.2%, CO decreased by 14.4% and 19.3%, NOx increased by 7.6% and 18.3%, whereas CO2 was almost unchanged when using
E5RON95 and E10RON95, respectively. The trend of emissions at idle mode was similar to that at full-load. The vehicle's acceleration was also improved, the acceleration
time reduced by 14.6% and 18.7% in case of E5RON95 and E10RON95 whereas the ability to start engine was almost the same.