Operating Limits for Ammonia Fuel Spark-Ignition Engine
Operating Limits for Ammonia Fuel Spark-Ignition Engine
复制标题
氨燃料火花点火发动机的操作限制
作者：
C. Mounaïm;P. Brequigny;C. Dumand;S. Houillé
本文的目的是提供新的数据的可能性，使用氨作为无碳燃料的火花点火发动机。为了更新文献中主要在CFR发动机中获得的结果，选择了当前的GDI PSA发动机（压缩比10.5：1）。特别注意确定当发动机供应有纯氨或少量H2（取决于发动机速度）时的最低可能负荷极限，以突出冷起动条件期间的限制。可以得出结论，该发动机可以在这些操作条件中的大多数下稳定运行，其中小于10%的H2（总燃料体积）添加到NH3中。对废气污染物，特别是NOx的测量使得可以评估稀释进气的可能性及其在轻微增压条件下用纯H2燃烧期间的限制。总之，10%的稀释极限允许减少高达40%的氮氧化物，同时保证稳定的运行。
The objective of this paper is to provide new data about the possibility of using ammonia as a carbon-free fuel in a spark-ignition engine. A current GDI PSA engine (Compression Ratio 10.5:1) was chosen in order to update the results available in the literature mainly obtained in the CFR engine. Particular attention was paid to determine the lowest possible load limit when the engine is supplied with pure ammonia or a small amount of H2, depending on engine speed, in order to highlight the limitation during cold start conditions. It can be concluded that this engine can run stably in most of these operating conditions with less than 10% H2 (of the total fuel volume) added to NH3. Measurements of exhaust pollutants, and in particular NOx, have made it possible to evaluate the possibility of diluting the intake gases and its limitation during combustion with pure H2 under slightly supercharged conditions. In conclusion, the 10% dilution limit allows a reduction of up to 40% in NOx while guaranteeing stable operation.