Abstract
The use of gasoline fuel in passenger cars has become popular once again due to the pollutants (oxides of nitrogen and particulate matter) diesel engines emit. In addition, research and development have been going on regarding the use of alternative and environmental fuels, such as biogas and hydrogen fuel, in passenger cars. In this study, a numeric engine model that was empirically validated with the engine test was used. Then, the effects of biogas and biogas + hydrogen fuels on fuel consumption and emissions in the Worldwide Harmonized Light Duty Test Cycle and New European Driving Cycle were analysed. Based on the findings, it was concluded that positive results in terms of emissions and fuel consumption could be obtained with a low ratio of hydrogen (5% as molar) added to biogas fuel. With the addition of hydrogen, 16.3% increase in fuel consumption with the use of biogas alone decreased to 12.1% and the increase in CO emissions decreased from 21.6% to 11.7% during NEDC cycle.
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