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首页> 外文期刊>Mechatronics, IEEE/ASME Transactions on >An On-Board Calibration Scheme for Map-Based Combustion Phase Control of Spark-Ignition Engines
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An On-Board Calibration Scheme for Map-Based Combustion Phase Control of Spark-Ignition Engines

机译：基于地图的火花点火发动机燃烧阶段控制的车载标定方案

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摘要

To improve the transient-state combustion phase control performance and adapt to the shift of engine dynamics, this paper presents an on-board calibration scheme to control the combustion phase of spark-ignition (SI) engines. First, taking a crank angle of 50% of the mass fraction burnt (CA50) as the combustion phase indicator, the relationship between CA50 and SA is studied, and the influences of two other important factors, engine speed and load, are regarded, as the parameters need calibration or update. Second, a bilinear interpolation algorithm is employed to depict the polynomial influence function of speed and load on CA50, which is also used for the CA50 control later. Then, the on-board calibration issue is converted to a parameters identification problem, and a stochastic gradient descent algorithm is utilized to identify model parameters by iterative updates, which reduces computational complexity and the use of memory space for the embedded control system. Finally, the proposed strategy is verified on a gasoline SI engine and is applied to the combustion phase control in the feedforward channel, which can significantly improve the performance at a transient-state operating condition.
机译：为了提高瞬态燃烧阶段的控制性能并适应发动机动力学的变化，本文提出了一种机载校准方案来控制火花点火（SI）发动机的燃烧阶段。首先，以燃烧质量分数（CA50）的50％的曲柄角作为燃烧阶段指标，研究了CA50与SA之间的关系，并考虑了发动机转速和负载这两个其他重要因素的影响，参数需要校准或更新。其次，采用双线性插值算法来描述速度和负载对CA50的多项式影响函数，该函数随后也用于CA50控制。然后，将机载校准问题转换为参数识别问题，并使用随机梯度下降算法通过迭代更新来识别模型参数，从而降低了计算复杂性并降低了嵌入式控制系统的存储空间。最后，该策略在汽油SI发动机上得到了验证，并应用于前馈通道中的燃烧阶段控制，可以显着提高瞬态工况下的性能。

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