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首页> 外文会议>ASME Internal Combustion Engine Division fall technical conference 2010 >EVALUATION OF DIESEL LOW TEMPERATURE COMBUSTION FUEL-INJECTION STRATEGIES AT DIFFERENT ENGINE LOADS
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EVALUATION OF DIESEL LOW TEMPERATURE COMBUSTION FUEL-INJECTION STRATEGIES AT DIFFERENT ENGINE LOADS

机译：不同发动机负荷下柴油低温燃烧燃料喷射策略的评价。

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摘要

High hydrocarbon levels in the exhaust, increased cycle-to-cycle variation and reduced energy-efficiency are typical problems associated with diesel LTC operation. To overcome these challenges, three different fuel injection strategies (late single-injection, early multiple-injections and split-injections) have been investigated on a modified single cylinder common-rail diesel engine. The effects of EGR, boost and injection pressure on the emissions and combustion efficiency have been analyzed. The effect of heavy EGR has been quantified in terms of a trade-off between the combustion phasing and the combustion efficiency. To minimize fuel condensation and wall-wetting with early injections, a criterion for selecting the earliest timing for injection during the compression stroke has also been evaluated. This research is concluded with the formulation of a load management strategy to enable energy-efficient diesel LTC up to 10 bar IMEP.
机译：废气中高碳氢化合物含量，循环间差异增加以及能效降低是柴油LTC运行相关的典型问题。为了克服这些挑战，在改进的单缸共轨柴油发动机上研究了三种不同的燃油喷射策略（后期单次喷射，早期多次喷射和分段喷射）。分析了EGR，增压和喷射压力对排放和燃烧效率的影响。已经根据燃烧定相和燃烧效率之间的权衡来量化重EGR的效果。为了最大程度地减少早期喷射时的燃油凝结和壁润湿，还评估了在压缩冲程期间选择最早喷射时机的标准。通过制定负载管理策略来结束本研究，以使节能柴油LTC达到10 bar IMEP。

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