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首页> 外文会议>FISITA World Automotive Congress >THE INFLUENCE OF INJECTION PRESSURE, BOOST PRESSURE AND EGR ON EMISSIONS AND FUEL CONSUMPTION OF A HEAVYDUTY DIESEL ENGINE
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THE INFLUENCE OF INJECTION PRESSURE, BOOST PRESSURE AND EGR ON EMISSIONS AND FUEL CONSUMPTION OF A HEAVYDUTY DIESEL ENGINE

机译：注射压力，提升压力和EGR对重型柴油发动机排放和燃料消耗的影响

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One of the great challenges in meeting future emission restrictions affecting H.D. diesel engines is the simultaneous reduction of Nox and soot emissions, without worsening fuel consumption. Among the different available strategies, the optimization of the injection parameters, combined with the efficient management of intake air and the use of exhaust gas recirculation (EGR), seems to have still a huge potential of improvement. With the aim to explore the effects of injection pressure, boost pressure, and EGR on soot, Nox, and BSFC, a study was conduced in a diesel engine fitted with a common-rail injection system. The study combined performance and emissions measurements together with heat release law analysis. Tests were done at high load modes from the European Steady state test Cycle (ESC), because approximately 70% of the Nox produced during the ESC emissions test is produced at high load. The results of the studies have been ultimately evaluated by using the parameters object of optimisation. These have been, mainly, Nox and soot emissions and BSFC. Other secondary parameters have been also calculated, and have been employed in the evaluation, at least only to ensure that no excessive limits were surpassed, as in the case of CO emissions. Results have shown that the targeted emission levels can be attained with EGR and a moderate increase of boost pressure and an important increase in injection pressure.
机译：满足影响H.D的未来排放限制方面存在巨大挑战之一。柴油发动机是同时减少NOx和烟灰排放，而不会使燃料消耗恶化。在不同的可用策略中，注射参数的优化，与进气空气的有效管理以及废气再循环（EGR）的使用似乎仍然具有巨大的改进潜力。旨在探索注射压力，升压压力和EGR在烟灰，NOx和BSFC上的效果，在配备共同轨道注射系统的柴油发动机中沟入研究。研究组合性能和排放量与热释放法分析。从欧洲稳态测试周期（ESC）的高负荷模式下进行测试，因为ESC排放试验期间大约70％的NOx在高负荷下产生。通过使用优化的参数对象，最终已经最终评估了研究结果。这些主要是NOx和SOOT的排放和BSFC。还计算了其他次要参数，并且已经在评估中采用，至少仅确保不超过过度限制，就像在共同排放的情况下一样。结果表明，靶向发射水平可以通过EGR获得和增量增加的增压压力和注射压力的重要增加。

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