Pressure Oscillations as a Factor Affecting the Management of the Fuel Injection Process in the Combustion Chamber of a Diesel Engine

2019 Systems of Signals Generating and Processing in the Field of on Board Communications Pub Date : 2019-03-01 DOI:10.1109/SOSG.2019.8706808

M. Shatrov, L. Golubkov, A. Dunin, P. Dushkin

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引用次数: 8

Abstract

Fuel injection causes considerable oscillations of fuel pressure at the injector inlet. One of the reasons is hydraulic impact originating when closing the injector nozzle needle. Evidently, these oscillations influence the fuel supply process in case of multiple injections: the previous injections would influence on the following ones. The influence of the interval between the impulses of a double injection on the injection rate value of the second portion was investigated. The superposition of waves in case of multiple injection may result both in amplification and damping of oscillations process. It is shown that with multiple injection, the controllability of fuel supply deteriorates, therefore, either a special design study of the fuel system for multiple injection or the introduction of additional electronic correction of control pulses by the diesel control system is required. On the other hand, it is shown how multiple injection can produce a stepwise injection characteristic, which can serve as a means of reducing nitrogen oxides and noise.

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影响柴油机燃烧室燃油喷射过程管理的压力振荡因素

燃油喷射在喷油器入口引起相当大的燃油压力振荡。其中一个原因是关闭喷油器喷嘴针时产生的液压冲击。显然，在多次喷射的情况下，这些振荡会影响供油过程:前一次喷射会影响后一次喷射。研究了二次注射脉冲间隔对第二部分注射速率值的影响。在多次注入的情况下，波的叠加会导致振荡过程的放大和阻尼。结果表明，多次喷射会使供油的可控性变差，因此，需要对多次喷射的燃油系统进行专门的设计研究，或者在柴油控制系统中引入额外的控制脉冲电子校正。另一方面，它显示了多次注入如何产生逐步注入特性，这可以作为减少氮氧化物和噪声的手段。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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2019 Systems of Signals Generating and Processing in the Field of on Board Communications

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