Influence of Gasoline Dual Fuel on a Compression Ignition Engine
DOI: 10.14416/j.ind.tech.2020.08.001
Keywords:
Dual fuel; Gasoline; Diesel; Combustion characteristicAbstract
An air pollution problem from automobiles and an unbalanced problem of petroleum fuel consumption between gasoline and diesel have led the researches to apply gasoline in the compression ignition engine. This study investigated the effects of gasoline as the dual fuel on the performance, efficiency, exhaust gas emission and combustion characteristic of a compression ignition engine. A single-cylinder diesel engine had been used throughout the experiment. Diesel fuel was injected directly into the combustion chamber by means of the electronic high-pressure common rail injection system while gasoline (10, 20, 30, 40, 50 and 60 % by energy) was injected into the intake port by a port fuel injection at 3 bars. Gasoline was allowed to evaporate and mix with the air homogeneously before entering into the chamber. Conventional diesel combustion was also tested for the reference. The results found that when using gasoline dual-fuel torque, power, brake mean effective pressure and thermal efficiency increase with the percentage of gasoline. However, with the higher amount of gasoline ratio the performance and efficiency decrease. Finally, the knock has occurred. For exhaust emissions, a small amount of gasoline could reduce CO, THC, NOX and soot simultaneously. Combustion characteristic indicated the short ignition delay and the higher heat release rate during the premixed combustion period when gasoline dual fuel was applied in the diesel engine.
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