Experimental study of effects of oxygen concentration on combustion and emissions of diesel engine

Experimental study of effects of oxygen concentration on combustion and emissions of diesel engine
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氧浓度对柴油机燃烧和排放影响的实验研究

DOI:
10.1007/s11431-009-0173-6
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发表时间:
2009-06
期刊:
Science in China Series E-Technological Sciences
影响因子:
--
通讯作者:
Zheng ZunQin
Zheng ZunQin
中科院分区:
其他
文献类型:
--
作者:
Yao MingFa;Zhang QuanChang;Zhang Pang;Zheng ZunQin

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通过试验研究了氧浓度对柴油机燃烧和排放的影响。通过调节CO2来控制进气氧浓度。结果表明,在低氧浓度水平下,通过调节喷射压力、正时和增压压力,可以实现非常低的碳烟和NOx排放水平。然而,CO和HC的排放和燃油消耗量显着增加,在低水平的氧气浓度。结果还表明,NOx排放强烈地依赖于氧气浓度,而碳烟排放强烈地依赖于喷射压力。降低氧气浓度是控制NOx排放最有效的方法。高的喷射压力是必要的,以减少烟雾排放。高喷射压力还可以降低CO和HC排放,提高发动机效率。随着进气压力的增加,NOx和烟度排放均降低。但是,为了获得高效率的低HC和CO排放,需要使用合适的进气压力。
Effects of oxygen concentration on combustion and emissions of diesel engine are investigated by experiment. The intake oxygen concentration is controlled by adjusting CO2. The results show that very low levels of both soot and NOxemissions can be achieved by modulating the injection pressure, timing, and boost pressure at the low levels of oxygen concentration. However, both CO and HC emissions and fuel consumption distinctly increase at the low levels of oxygen concentration. The results also indicate that NOxemissions strongly depend on oxygen concentration, while soot emissions strongly depend on injection pressure. Decreasing oxygen concentration is the most effective method to control NOxemissions. High injection pressure is necessary to reduce smoke emissions. High injection pressure can also decrease the CO and HC emissions and improve engine efficiency. With the increase of intake pressure, both NOxand smoke emissions decrease. However, it is necessary to use the appropriate intake pressure in order to get the low HC and CO emissions with high efficiency.
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发表时间: 2003-09
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影响因子: --
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