Abstract
An engine with common-rail direct injection diesel uses Hydrogen and hydrogen-enriched CNG to investigate their possible usage. The engine's air intake manifold delivers hydrogen/CNG and hydrogen mixes. Different injection pressures (three) and at higher load are used to test out the different engine output parameters. In dual and single-fuel operations with diesel, dual-fuel operations produce higher in-cylinder pressure (73.39 bar) and shown better combustion. Due to induction of dual fuel, there is large variability in ignition delay and combustion duration compared to pure diesel. Enriching hydrogen reduces specific fuel usage. Significant reduction in engine pollutants is observed in dual fuel mode compared to diesel fuel. Hydrogen substitutes reduce THC and CO2 emissions by 30–35% and 3–4% respectively. Dual-fuel operations emit less smoke (5–10%) in different injection pressure than diesel. At all injection pressure the different combustion parameters, performances (37.2% better than D100) and emissions like NOx, CO2, and smoke are better for all dual-fuel than diesel at rated load for the different fuel approach type two (DFA2).
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