首页> 外文会议>Proceedings of the 2009 spring technical conference of the ASME Internal Combustion Engine Division >MODEL-BASED ASSESSMENT OF TWO VARIABLE CAM TIMING STRATEGIES FOR HCCI ENGINES: RECOMPRESSION VS. REBREATHING
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MODEL-BASED ASSESSMENT OF TWO VARIABLE CAM TIMING STRATEGIES FOR HCCI ENGINES: RECOMPRESSION VS. REBREATHING

机译:HCCI发动机的两种可变凸轮定时策略基于模型的评估:压缩VS。重新呼吸

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The paper discusses the development and application of a single-cylinder HCCI engine model within the framework of a 1-D engine simulation software (GT-Power~?). The HCCI combustion model includes a predictive burn model based on the in-cylinder conditions, along with methods to estimate in-cylinder NOx production and ringing intensity. The validation of the model was done by comparing simulation results with available experimental data, highlighting the comparison between two different HCCI variable cam timing strategies (recompression and rebreathing). A comparative study of the two valve strategies was carried out with the validated model and the entire operational range of the strategies was compared and analyzed for the constraints that limit further load extension. Recompression was found to be more efficient than rebreathing in the low load operating region. However, the rebreathing strategy was found to span a wider operational range compared to recompression at all speeds.
机译:本文在一维发动机仿真软件(GT-Power〜?)的框架内讨论了单缸HCCI发动机模型的开发和应用。 HCCI燃烧模型包括基于缸内条件的预测燃烧模型,以及估算缸内NOx产生量和振铃强度的方法。该模型的验证是通过将仿真结果与可用的实验数据进行比较来完成的,突出了两种不同HCCI可变凸轮正时策略(压缩和重新呼吸)之间的比较。通过验证的模型对两种阀门策略进行了比较研究,并对策略的整个操作范围进行了比较和分析,以了解限制进一步负荷扩展的约束条件。发现在低负载操作区域,再压缩比再呼吸更有效。但是,与在所有速度下进行再压缩相比,发现重新呼吸策略的运行范围更广。

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