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首页> 外文会议>2011 International Conference on Computer Distributed Control and Intelligent Environmental Monitoring >Numerical Simulation on the Effect of Pilot Injection on Combustion and NOx Emission Characteristics of Light-Vehicle Diesel Engine
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Numerical Simulation on the Effect of Pilot Injection on Combustion and NOx Emission Characteristics of Light-Vehicle Diesel Engine

机译：先导喷射对轻型柴油机燃烧及NOx排放特性影响的数值模拟

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摘要

Based on KIVA-3V code, the numerical simulation on the combustion process and NOx emission of a light-vehicle diesel engine is carried out, using different injection strategies. The results show that compared with the traditional single injection, pilot injection can decline the ignition delay period and the maximum combustion temperature, which leads to the reduction of the NOX emission, as pre-injection mass increases, NOxemission increases. Fuel of pilot injection must be sufficient for preheating the combustion chamber. Otherwise, NOx emission is deteriorated in the condition of excessive amount of pilot injection. For the light-vehicle diesel engine investigated in this paper, when the proportion of pre-injection mass to cycle-injection mass is2.5% and the angle between pilot injection to main injection is15¡ãCA, the NOX emission declines nearly 21.8%.
机译：基于KIVA-3V代码，使用不同的喷射策略对轻型柴油机的燃烧过程和NOx排放进行了数值模拟。结果表明，与传统的单次喷射相比，引燃喷射可以减少点火延迟时间和最高燃烧温度，从而减少NOx排放，随着预喷射质量的增加，NOx排放增加。先导喷射的燃料必须足以预热燃烧室。否则，在引燃喷射量过多的情况下，NOx排放会恶化。对于本文研究的轻型柴油机，当预喷射质量与循环喷射质量的比例为2.5％，且先导喷射与主喷射之间的夹角为15°CA时，NOX排放降低了近21.8％。

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