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In this work, experiments were conducted on a homogeneous charge compression ignition (HCCI) engine with acetylene as the sole fuel at different power outputs. Initially, the intake air was heated to different temperatures in order to determine the optimum level at every output. Charge temperatures needed were in the range of 40–110°C from no load to a BMEP (Brake Mean Effective Pressure) of 4bar...
Though hydrogen fueled spark ignition engine can operate at high thermal efficiency with almost zero emission of HC and CO, the high level of NOx poses problems. The high combustion temperature and lean mixtures used are the reasons. In this work, the effect of N2, CO2 and hot EGR gas as diluents in the intake charge to suppress NO emission in a manifold injected hydrogen fueled SI engine was studied...
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