SET Proceedings 2978-4387 Caravel Press 10.65582/set.2011.067 2011.067 Misfire Reduction Using Hydrogen in an SI Engine CevizM. Akif aceviz@atauni.edu.tr EfeŞükran sefe@bayburt.edu.tr SenAsok K. asen@iupui.edu Department of Mechanical Engineering, Faculty of Engineering, University of Atatürk, Erzurum 25240, Türkiye Department of Mechanical Engineering, Faculty of Engineering, University of Bayburt, Bayburt 69000, Türkiye Richard G. Lugar Centre for Renewable Energy, and Department of Mathematical Sciences, Indiana University, 402 N. Blackford Street, Indianapolis, IN 46202, USA 04092011 10 978-1-995850-03-0 1 8 4 September 2011 © 2011 Copyright WSSET 2011

An investigation was made to study the influence of adding small amounts of hydrogen to gasoline-air mixtures on the number of misfire cycles in an SI engine operating under lean burn conditions. The test engine was run at 2000 rpm and spark timing was set to MBT (minimum spark advance for best torque). A lean mixture with air-fuel ratio of 1.26 was used, and hydrogen was added in the amounts 2.14%, 5.28% and 7.74% by volume. The in-cylinder pressure was recorded over 1000 consecutive engine cycles. From the pressure measurements, the indicated mean effective pressure (imep) time series was calculated. The imep time series revealed that as the amount of hydrogen addition increases, the number of misfire cycles decreases. In particular, with 7.74% hydrogen addition, the number misfire cycles is reduced significantly.

 Alternative Fuels Hydrogen Misfire Cycles SI Engines 4 to 7 September 2011 10th International Conference on Sustainable Energy Technologies SET2011 10 Istanbul, Türkiye