Abstract
This paper presents results of utilization of gasohol E5 and E10 fuels on in-used motorcycle and car regarding performance and exhaust emissions of the engines. It is a collaborative research between Green Field Joint Stock, a bioethanol production company and Laboratory of Internal Combustion Engine, Institute of Transportation Engineering, Hanoi University of Technology. Findings of the research on the testing motorcycle and car showed that, using E5 and E10 fuels the air-fuel mixing process and the combustion inside the combustion chamber were improved on account of better evaporation and due to the presence of oxygen of ethanol. The stoichiometric air fuel ratio was decreased thanks to the available oxygen in the fuel. These helped improve engine power, fuel consumption and exhaust emission components such as CO, HC, while NOx emission increased significantly because of the better combustion and high combustion temperature. Acceleration ability of the testing car and motorcycle was improved with bioethanol E5 and E10 fuels compared with market gasoline RON92. In addition, the improvement in acceleration ability of the testing car is better with E10, while of the testing motorcycle, the acceleration ability is better with E5 fuel. The findings contributed remarkably to the challenge of wide application of bioethanol on vehicles in Vietnam.
Keywords: Bio-fuels, gasohol E5, E10, exhaust emissions.