Design and experimental validation of a model-based injection pressure controller in a common rail system for GDI engine
Design and experimental validation of a model-based injection pressure controller in a common rail system for GDI engine
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DOI：
10.1109/acc.2011.5990940
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发表时间：
2011-08
期刊：
影响因子：
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通讯作者：
A. Gaeta;G. Fiengo;A. Palladino;V. Giglio
中科院分区：
文献类型：
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作者：
A. Gaeta;G. Fiengo;A. Palladino;V. Giglio
车辆排放要求的逐步降低迫使汽车工业投资于替代控制策略的研究和开发。所有控制功能和资源都在电子控制单元中永久激活，确保在污染物排放和功率密度以及驾驶性能和诊断方面的最佳性能。实现这些目标的一种方法是采用汽油直喷（GDI）发动机技术。为了辅助发动机管理系统的设计，通过更好的性能的缸内直喷发动机和共轨（CR）系统，在这项工作中，喷射压力调节，以稳定在CR燃油管路的燃油压力，提出并通过实验验证。所得到的控制策略是由一个反馈积分行动和一个静态的基于模型的前馈行动，其增益被调度为基本植物参数的函数。闭环性能的调整，然后支持的相位裕度和灵敏度函数的分析。初步的实验结果证实了控制算法的有效性，在调节平均值轨压力独立于发动机工作条件，即发动机转速和喷射时间，有限的设计努力。
Progressive reductions in vehicle emission requirements have forced the automotive industry to invest in research and development of alternative control strategies. All control features and resources are permanently active in an electronic control unit, ensuring the best performance in terms of pollutant emissions and power density, as well as driveability and diagnostics. A way to attain these goals is the adoption of Gasoline Direct Injection (GDI) engine technology. In order to assist the engine management system design, through a better performance of GDI engine and the Common Rail (CR) system, in this work an injection pressure regulation to stabilize the fuel pressure in the CR fuel line is proposed and validated via experiments. The resulting control strategy is composed by a feedback integral action and a static model-based feed-forward action whose gains are scheduled as function of fundamental plant parameters. The tuning of the closed loop performance is then supported by an analysis of the phase margin and the sensitivity function. Preliminary experimental results confirm the effectiveness of the control algorithm in regulating the mean value rail pressure independently from engine working conditions, i.e. engine speed and time of injection, with limited design effort.