喷油器结构对柴油机NO_X和碳烟排放影响的研究

发布时间：2018-05-22 13:09

本文选题：柴油机 + 喷油器　；参考：《机械设计与制造》2016年08期

【摘要】：通过对某四缸增压中冷柴油机进行不同工况下的排放对比试验,研究喷油器压力室、喷孔直径、油嘴伸出量和喷油器开启压力对柴油机排放特性的影响,为样机优化提供参考方案。试验表明:无压力室喷油器碳烟的生成量减小但NO_X的生成量会增加;除了2850r/min转速的中高负荷情况下,柴油机的NO_X生成量随着喷孔直径的减小而增大,碳烟的生成量则随着孔径的减小而减小;随着油嘴伸出量的增加,柴油机的NO_X生成量逐渐增大,碳烟的生成量逐渐减小;喷油器的开启压力的增加导致柴油机的NO_X生成量变大,但是碳烟生成量有所减少,并且转速越低,负荷越小时这种影响更明显。通过试验确定喷油器压力室的选择以及最佳喷油器孔径、开启压力、喷油嘴伸出量。
[Abstract]:The effects of injector pressure chamber, injection hole diameter, nozzle outburst and injector opening pressure on the emission characteristics of a four-cylinder turbocharged and intercooled diesel engine were studied. Provides the reference scheme for the prototype optimization. The test results show that the amount of soot produced by the fuel injector in the non-pressure chamber will decrease but the amount of NO_X will increase, except for the moderate and high load of the 2850r/min speed, the NO_X production of the diesel engine increases with the decrease of the diameter of the injection hole. The amount of soot emission decreases with the decrease of aperture; with the increase of the amount of nozzle extension, the amount of NO_X of diesel engine increases gradually, and the amount of soot emission decreases gradually; the increase of the opening pressure of fuel injector leads to the increase of NO_X production of diesel engine. But soot production is reduced, and the lower the speed, the smaller the load. The selection of the injector pressure chamber and the optimum injector aperture, opening pressure and nozzle protruding amount are determined by test.
【作者单位】：江苏大学汽车与交通工程学院;
【基金】：国家自然科学基金资助项目(51476072) 江苏省高校优势学科建设工程资助项目(PAPD)
【分类号】：U464.172

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