Abstract
In the last decade, there has been a major ascending interest in reducing the polluting concentration and fuel consumption of internal combustion engines. The solution proposed in this research project was to integrate a hydrogen and oxygen mixture \({{\rm H}_{2}/{\rm O}_{2}}\), obtained through an electrolysis process of water, as supplementary fuel, in a 93 cm\({^{3}}\) gasoline engine. Several experimental tests were carried out under different engine loads (0, 20, 50, 80 and 100 %) in order to investigate the effect of \({{\rm H}_{2}/{\rm O}_{2}}\) addition on the engine performance characteristics and the exhaust gas concentration. At engine loads more than 20 %, tests showed that adding \({{\rm H}_{2}/{\rm O}_{2}}\) reduced the brake-specific fuel consumption by an average of 7.8 %. They also showed that the alternative fuel was very efficient in reducing the concentration of pollutant emissions in the exhaust gases: hydrocarbon (HC) concentration diminished by an average of 18 %, carbon monoxide (CO) concentration decreased by an average of 31.8 %, and \({{\rm CO}_{2}}\) concentration decreased up to 30 %. However, at low engine loads, \({{\rm NO}_{x}}\) concentration decreased by an average of 26 %, but it increased significantly with the increase in engine loads (exceeding 80 %).
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Brayek, M., Jemni, M.A., Kantchev, G. et al. Effect of Hydrogen–Oxygen Mixture Addition on Exhaust Emissions and Performance of a Spark Ignition Engine. Arab J Sci Eng 41, 4635–4642 (2016). https://doi.org/10.1007/s13369-016-2228-x
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DOI: https://doi.org/10.1007/s13369-016-2228-x