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Development of an empirical correlation for combustion durations in spark ignition engines

机译：火花点火发动机燃烧持续时间的经验相关性的发展

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摘要

Development of an empirical correlation for combustion duration is presented. For this purpose, the effects of variations in compression ratio engine speed, fuel/air equivalence ratio and spark advance on combustion duration have been determined by means of a quasi-dimensional SI engine cycle model previously developed by the authors. Burn durations at several engine operating conditions were calculated from the turbulent combustion model. Variations of combustion duration with each operating parameter obtained from the theoretical results were expressed by second degree polynomial functions. By using these functions, a general empirical correlation for the burn duration has been developed. In this correlation, the effects of engine operating parameters on combustion duration were taken into account. Combustion durations predicted by means of this correlation are in good agreement with those obtained from experimental studies and a detailed combustion model.
机译：提出了燃烧持续时间的经验相关性的发展。为此目的，借助于作者先前开发的准尺寸SI发动机循环模型已经确定了压缩比发动机转速，燃料/空气当量比和火花提前量的变化对燃烧持续时间的影响。根据湍流燃烧模型计算了几种发动机工况下的燃烧持续时间。燃烧持续时间随从理论结果获得的每个运行参数的变化用二阶多项式函数表示。通过使用这些功能，已经开发出燃烧持续时间的一般经验相关性。在这种关联中，考虑了发动机运行参数对燃烧持续时间的影响。通过这种相关性预测的燃烧持续时间与从实验研究和详细的燃烧模型获得的燃烧持续时间非常一致。

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