A series-parallel hydraulic hybrid system applied to public buses is put torwaro, ano parameters of key components are analyzed and determined. Energy management strategy based on logic thresh- old is designed which i...A series-parallel hydraulic hybrid system applied to public buses is put torwaro, ano parameters of key components are analyzed and determined. Energy management strategy based on logic thresh- old is designed which is aimed at efficient operation of the overall system considering the operational characteristic of the components and taking the curves of engine, hydraulic pump/motor and hydrau- lic pump as the main design basis; regenerative control strategy which makes regenerative brake sys- tem and frictional brake system work harmoniously is designed to raise recovery rate of regenerative brake energy. System dynamic modeling and simulation results show that the energy control strategy designed here is able to adapt system to changes of working condition and switch the operating mode reasonably. The regenerative braking control strategy is effective in raising the utilization of energy and improving fuel economy.展开更多
Simple and efficient energy management strategy is the key to ensure hybrid vehicle performance. Based on hybrid dynamical system theory and the concept of finite state mechanism,power split hybrid connected structure...Simple and efficient energy management strategy is the key to ensure hybrid vehicle performance. Based on hybrid dynamical system theory and the concept of finite state mechanism,power split hybrid connected structure hydraulic hybrid system was proposed and described. In order to meet the demand for driving,the layered advanced control strategy was proposed in this paper,which referred to vehicle driving experience. Using Matlab /Simulink /Stateflow hybrid modeling method, the economy performance and the acceleration performance of the vehicle under the typical city driving cycles were carried on the simulation analysis. The results show that the proposed topology and control strategy can obviously improve engine output characteristic,effectively enhance the vehicle's instantaneous power performance and economy,and also has a better adaptability in different traffic environments.展开更多
分析了以超级电容和ISG(integrated startergenerator)电机组成辅助动力源、电机驱动回转为特征的并联混合动力挖掘机系统;提出了发动机双模式转矩均衡控制策略,以负载工况与超级电容SOC(state of charge,荷电状态)为决策依据,实现发动...分析了以超级电容和ISG(integrated startergenerator)电机组成辅助动力源、电机驱动回转为特征的并联混合动力挖掘机系统;提出了发动机双模式转矩均衡控制策略,以负载工况与超级电容SOC(state of charge,荷电状态)为决策依据,实现发动机工作点的自适应调节.在特定工作点下,以转矩均衡控制策略替代传统的转速感应控制,系统转速更加稳定.ISG电机可以均衡发动机转矩,使其工作于高效率区.另外,利用回转驱动电机实现回转势能的再生利用.建立并联混合动力挖掘机系统的Simulink仿真模型.结果表明,该控制策略适用于挖掘机并联混合动力系统,具有显著的节能性.展开更多
分析了以电容器为蓄能装置的液压挖掘机并联混合动力系统的结构,在此基础上,针对液压挖掘机的工况,提出了以发动机工作点和电容器荷电状态(state of charge,SOC)值为优化变量的控制策略,并建立了试验系统对该控制策略进行试验研究。研...分析了以电容器为蓄能装置的液压挖掘机并联混合动力系统的结构,在此基础上,针对液压挖掘机的工况,提出了以发动机工作点和电容器荷电状态(state of charge,SOC)值为优化变量的控制策略,并建立了试验系统对该控制策略进行试验研究。研究结果表明,采用该控制策略后,改善了发动机工作点的分布区域,抑制了电容器SOC的变化幅度,且基本不影响系统的响应性能。展开更多
基金Supported by the National Natural Science Foundation of China(No.50875054)Weihai Science and Technology Development Plan Project(No.2012DXGJ13)
文摘A series-parallel hydraulic hybrid system applied to public buses is put torwaro, ano parameters of key components are analyzed and determined. Energy management strategy based on logic thresh- old is designed which is aimed at efficient operation of the overall system considering the operational characteristic of the components and taking the curves of engine, hydraulic pump/motor and hydrau- lic pump as the main design basis; regenerative control strategy which makes regenerative brake sys- tem and frictional brake system work harmoniously is designed to raise recovery rate of regenerative brake energy. System dynamic modeling and simulation results show that the energy control strategy designed here is able to adapt system to changes of working condition and switch the operating mode reasonably. The regenerative braking control strategy is effective in raising the utilization of energy and improving fuel economy.
基金National Natural Science Foundation of China(No.51275123)
文摘Simple and efficient energy management strategy is the key to ensure hybrid vehicle performance. Based on hybrid dynamical system theory and the concept of finite state mechanism,power split hybrid connected structure hydraulic hybrid system was proposed and described. In order to meet the demand for driving,the layered advanced control strategy was proposed in this paper,which referred to vehicle driving experience. Using Matlab /Simulink /Stateflow hybrid modeling method, the economy performance and the acceleration performance of the vehicle under the typical city driving cycles were carried on the simulation analysis. The results show that the proposed topology and control strategy can obviously improve engine output characteristic,effectively enhance the vehicle's instantaneous power performance and economy,and also has a better adaptability in different traffic environments.
文摘分析了以超级电容和ISG(integrated startergenerator)电机组成辅助动力源、电机驱动回转为特征的并联混合动力挖掘机系统;提出了发动机双模式转矩均衡控制策略,以负载工况与超级电容SOC(state of charge,荷电状态)为决策依据,实现发动机工作点的自适应调节.在特定工作点下,以转矩均衡控制策略替代传统的转速感应控制,系统转速更加稳定.ISG电机可以均衡发动机转矩,使其工作于高效率区.另外,利用回转驱动电机实现回转势能的再生利用.建立并联混合动力挖掘机系统的Simulink仿真模型.结果表明,该控制策略适用于挖掘机并联混合动力系统,具有显著的节能性.
文摘分析了以电容器为蓄能装置的液压挖掘机并联混合动力系统的结构,在此基础上,针对液压挖掘机的工况,提出了以发动机工作点和电容器荷电状态(state of charge,SOC)值为优化变量的控制策略,并建立了试验系统对该控制策略进行试验研究。研究结果表明,采用该控制策略后,改善了发动机工作点的分布区域,抑制了电容器SOC的变化幅度,且基本不影响系统的响应性能。
