This book focuses on the feasibility of operating Spark Ignition engines on hydrogen-ethanol dual fuels. Hydrogen-Ethanol could be the best option of dual fuelling, which not only minimizes all types of exhaust emissions but also has better power outputs, complete and strong combustion and smooth engine operation. However handling, delivery and injection of hydrogen requires additional care.The important improvement of hydrogen addition is to reduce the Specific fuel consumption of ethanol engines.Recent activities on that matter focus on hydrogen blended ethanol engines rather that pure...