喷氢正时及喷氢脉宽对于缸内直喷氢气发动机混合气形成及燃烧特性的影响
Effects of Hydrogen Injection Timing and Pulse Width on Mixture and Combustion Characteristics of In-cylinder Direct Injection Hydrogen Engine
为研究喷氢策略对于缸内直喷氢气发动机燃烧特性的影响，利用三维仿真软件建立了氢气发动机单缸仿真模型，不同喷氢脉宽、喷氢正时对于缸内混合气形成以及燃烧的影响。结果表明：随着喷氢脉宽的增长，缸内峰值压力逐渐上升，但同时其缸内湍动能也会有所上升，更易发生异常燃烧现象，当喷氢脉宽从65℃A延长至85℃A时，平均每延长5℃A，缸内峰值压力提高11.2%，同时，发动机在80℃A喷氢脉宽下有着较好的燃烧特性；当喷氢正时较早时，气缸内易产生爆震等异常燃烧现象，当喷…查看全部>>
In order to study the effect of hydrogen injection strategy on the combustion characteristics of the in-cylinder direct injection hydrogen engine, a single-cylinder simulation model of the hydrogen engine was established by using three-dimensional simulation software, and the effects of different hydrogen injection pulse widths and injection timing on the in-cylinder mixture formation and combustion were investigated. The results show that: with the growth o…查看全部>>
评论