Combustion, Performance, Emissions and Energy Analysis of Hydrogen Fuelled Spark-Ignition Engine under Lean Burn Condition

Abstract

<div class="section abstract"><div class="htmlview paragraph">The design and development of a hydrogen powered spark-ignition engine, aimed for installation on a vehicle for on-road application. The experiment was conducted at WOT (Wide Open Throttle) condition at a speed of 4000 rpm with an excess air-fuel ratio of 1.3, 1.5, 2.2, 2.5, 3, 3.75, and 4.0. The ignition timing was optimized for maximum torque at each value of the excess air ratio. The various parameters analyzed such as in-cylinder pressure, Pressure and Volume, Logarithm of Pressure and Volume, Mass fraction burned, Cummulative heat release, Net heat release, Rate of pressure rise, and Mean gas temperature. The results show that there is a profound effect of excess air-fuel ratio on the engine’s mean effective pressure, output power, Brake thermal efficiency, Volumetric efficiency, Brake specific fuel consumption, and NOx emissions. The peak cylinder pressure decreases with an increase in excess air-fuel ratio and NOx emissions are reduced due to reduced mean gas temperature. Also, fuel energy is analyzed to review fuel energy converted to net power, heat lost to exhaust gas and coolant. The aim of researchers is to analyze the engine which is in production and confirm their suitability for meeting future emissions norms with minor modifications to meet Sustainable Development Goals(SDG).</div></div>