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全世界日益严格的排放法规迫使制造商不得不将更多的注意力转向点燃和压燃发动机的排放性能上。发动机电子控制系统可精确控制发动机运行参数,并提供了一种按发动机性能以最低成本的低排放的发动机调整方法。本文旨在定量分析两项调整参数,即喷油始点和废气再循环(EGR)率对现代电控高速直喷式柴油机排放的影响,介绍发动机在两种转速和负荷组合(代表欧洲排放循环期间典型的发动机运转工况)下运行时的排放数据。在每一工况下改变调整策略并观察其结果。研究喷油始点和EGR率的变化对排放和发动机性能的影响,从而发现它们都对发动机效率和排放性能具有重大的影响。
Increasingly stringent emission regulations worldwide force manufacturers to shift their attention to the emission performance of igniting and compression-ignition engines. The engine’s electronic control system provides precise control of engine operating parameters and provides a method of engine tuning with low-cost, low-emission engine performance. The purpose of this paper is to quantitatively analyze two tuning parameters, namely the effect of injection start and exhaust gas recirculation (EGR) rates on the emission of modern electronically controlled high-speed direct injection diesel engines. The introduction of the engine in two speed and load combinations (representing the European emissions cycle Typical engine operating conditions). In each case change the adjustment strategy and observe the results. The effects of changes in injection start and EGR rates on emissions and engine performance were studied to find that they all had a significant impact on engine efficiency and emissions performance.