As one of the most important actuators for gasoline direct injection technology,common rail systems provide the requested rail pressure for fuel injection.Special system characteristics,such as coupled discrete-contin...As one of the most important actuators for gasoline direct injection technology,common rail systems provide the requested rail pressure for fuel injection.Special system characteristics,such as coupled discrete-continuous dynamic in the common rail system,limited measurable states,and time-varying engine operating conditions,impel the combination of advanced methods to obtain the desired injection pressure.Therefore,reducing the pressure fluctuation and satisfying engineering implementation have become noteworthy issues for rail pressure control(RPC)systems.In this study,the benchmark problem and the design specification of RPC proposed by 2018 IFAC E-CoSM Committee are introduced.Moreover,a common rail system model is provided to the challengers,and a traditional PI control is applied to show the problem behaviors.Finally,intermediate results of the challengers are summarized briefly.展开更多
根据电控喷油器各部件的结构特点、耦合关系及物理性质,建立了电控喷油器电磁阀驱动、电磁阀、液力、机械系统耦合的数学模型,完成了仿真计算并获得了各因素对电控喷油器性能影响的空间图谱;系统地研究了电控喷油器结构参数对喷油器动...根据电控喷油器各部件的结构特点、耦合关系及物理性质,建立了电控喷油器电磁阀驱动、电磁阀、液力、机械系统耦合的数学模型,完成了仿真计算并获得了各因素对电控喷油器性能影响的空间图谱;系统地研究了电控喷油器结构参数对喷油器动态响应的影响。以仿真结果为基础,以系统的响应和经济性为目标,建立了系统的多元回归方程。通过多目标规划,对系统的结构参数进行了优化。利用分析结果,设计了相应的零部件。在喷油器动态特性测试台架上,对经过优化设计的喷油器进行了动态响应特性等测试。测试结果与仿真结果有较好的一致性;喷油器针阀开启和关闭响应时间均可达0.2 m s,喷油规律波形与控制脉冲波形基本一致。展开更多
基金the National Nature Science Foundation of China(Nos.61790564,61803173)the Program for Natural Science Foundation of Jilin Province(No.20190103047JH).
文摘As one of the most important actuators for gasoline direct injection technology,common rail systems provide the requested rail pressure for fuel injection.Special system characteristics,such as coupled discrete-continuous dynamic in the common rail system,limited measurable states,and time-varying engine operating conditions,impel the combination of advanced methods to obtain the desired injection pressure.Therefore,reducing the pressure fluctuation and satisfying engineering implementation have become noteworthy issues for rail pressure control(RPC)systems.In this study,the benchmark problem and the design specification of RPC proposed by 2018 IFAC E-CoSM Committee are introduced.Moreover,a common rail system model is provided to the challengers,and a traditional PI control is applied to show the problem behaviors.Finally,intermediate results of the challengers are summarized briefly.
文摘根据电控喷油器各部件的结构特点、耦合关系及物理性质,建立了电控喷油器电磁阀驱动、电磁阀、液力、机械系统耦合的数学模型,完成了仿真计算并获得了各因素对电控喷油器性能影响的空间图谱;系统地研究了电控喷油器结构参数对喷油器动态响应的影响。以仿真结果为基础,以系统的响应和经济性为目标,建立了系统的多元回归方程。通过多目标规划,对系统的结构参数进行了优化。利用分析结果,设计了相应的零部件。在喷油器动态特性测试台架上,对经过优化设计的喷油器进行了动态响应特性等测试。测试结果与仿真结果有较好的一致性;喷油器针阀开启和关闭响应时间均可达0.2 m s,喷油规律波形与控制脉冲波形基本一致。
