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首页> 外文期刊>RSC Advances >Influence of oxygen enriched hydrogen gas as a combustion catalyst in a DI diesel engine operating with varying injection time of a diesel fuel
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Influence of oxygen enriched hydrogen gas as a combustion catalyst in a DI diesel engine operating with varying injection time of a diesel fuel

机译：在柴油喷射时间不同的情况下运行的DI柴油机中富氧氢气作为燃烧催化剂的影响

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Automobiles emit many pollutants. These pollutants become a big threat to our environment. This study examines the influence of oxygen enriched hydrogen (OEH) gas as a combustion catalyst in a DI diesel engine operating with varying injection times of a diesel fuel. For this study, OEH gas was produced by the process of electro-chemical dissociation of water. The OEH gas at 4.6 litres per minute (lpm) was aspirated into an engine cylinder along with intake air at varied injection times of a diesel fuel. Three injection times were selected. The first was the standard injection time of 23 degrees BTDC (before top dead centre) recommended by the engine manufacturer, the second one was the retarded injection time of 19 degrees BTDC and the third one was the advanced injection time of 27 degrees BTDC. When the OEH gas was inducted at 100% rated load of the engine at the standard injection time, the brake thermal efficiency increased by 16.45% and the emissions of oxides of nitrogen (NOX) increased by 16.9%. All other engine-out emissions, such as carbon monoxide (CO), unburned hydrocarbon (UBHC) and smoke, were reduced by 15.38%, 19.7% and 28.57%, respectively, compared to diesel combustion. At the advanced injection time, the brake thermal efficiency and the NOX emission were increased by 19.03% and 21.42%, respectively. Other engine-out emissions, such as CO, UBHC and smoke, were reduced by 11.53%, 22.72% and 30.95%, respectively. However, at the retarded injection time, the brake thermal efficiency increased by 12.21% and engine-out emissions, such as CO, UBHC, NOX and smoke, were reduced by 7.69%, 12.12%, 9.04% and 19.04%, respectively. From the data, it is evident that the diesel engine can be operated efficiently using the OEH gas as a combustion catalyst with the optimized injection timing of a diesel fuel.
机译：汽车排放许多污染物。这些污染物对我们的环境构成了巨大威胁。这项研究研究了在以不同的柴油喷射时间运行的DI柴油机中，富氧氢气（OEH）气体作为燃烧催化剂的影响。对于本研究，OEH气体是通过水的电化学分解过程产生的。以每分钟4.6升（lpm）的OEH气体与进气在不同的柴油喷射时间下一起被吸入发动机气缸。选择了三个注射时间。第一个是发动机制造商建议的23度BTDC（在上死点之前）的标准喷射时间，第二个是19度BTDC的延迟喷射时间，第三个是27度BTDC的提前喷射时间。在标准喷射时间以发动机的100％额定负载引入OEH气体时，制动器的热效率提高了16.45％，氮氧化物（NOX）的排放量增加了16.9％。与柴油燃烧相比，所有其他发动机熄火排放量，例如一氧化碳（CO），未燃烧的碳氢化合物（UBHC）和烟气，分别减少了15.38％，19.7％和28.57％。在提前喷射时间，制动热效率和NOX排放分别增加了19.03％和21.42％。其他发动机熄火排放，例如CO，UBHC和烟尘，分别减少了11.53％，22.72％和30.95％。但是，在延迟的喷射时间，制动器的热效率提高了12.21％，发动机排出的废气（如CO，UBHC，NOX和烟）分别减少了7.69％，12.12％，9.04％和19.04％。根据这些数据，很明显，通过使用OEH气体作为燃烧催化剂，可以在优化柴油喷射定时的情况下有效地操作柴油发动机。

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