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Thermal Efficiency Analysis On Lean Burn Spark Ignition Engine, Joshua Patrick Jayaseelan

Electronic Theses and Dissertations

Advanced spark ignition (SI) engines can operate under lean conditions in order to improve the efficiency and reduce the emissions. Under extensive lean conditions, the ignition and complete combustion of the charge mixture is a challenge, because of the reduced cylinder charge reactivity, leading to combustion instabilities, thus making the empirical investigations in the vicinity of and beyond the lean limit of current engines, unviable. With further improvements to the ignition and combustion control, the lean operation limit may be extended in future engines. To circumvent this limitation to an extent, in this work, the potential of extremely lean mixtures …