Simulation of HEV Multi-objective Optimization Based on Variable Logic Threshold

为实现混合动力汽车的动力性、燃油经济性以及模式切换平顺性,以基于CVT的插电式混合动力汽车为研究对象,针对混合动力汽车的多目标优化问题,提出一种可变逻辑门限控制策略.整车控制过程中根据功率需求进行模式切换,其中行驶需求功率根据车速和节气门开度计算得到,切换门限根据整车参数实时计算.以发动机和电机的输出特性、电池的SOC为主要依据计算工作模式切换的可变逻揖门限值.通过电机助力保证整车具有较好的动力性能,通过不同模式下驱动功率的一致性实现模式切换平顺,通过小功率需求时仅可能多用纯电动来提高燃油经济性.在MATLAB/Simulink平台下建立混合动力汽车前向仿真模型,并在NEDC工况下进行仿真.仿真结果表明:整车动力性能得到了提高,实现了模式切换平顺性,节油40％.     

混联式混合动力汽车控制策略开发与仿真研究

阐述了切换式混联混合动力汽车系统特点和控制模式。对该种混合动力汽车起步工况、正常行驶工况、减速工况和故障工况等工作模式进行了分析。利用PSAT软件建立了仿真模型,对整车性能仿真分析。通过与串联式ZK6108HGD混合动力客车进行对比,验证了仿真模型的准确性。     

沃尔沃研发插电式混合动力客车

日前，沃尔沃客车正在开发一款插电式混合动力客车。该客车单靠电力便可长途行驶，且噪音低、零排放。在欧盟的支持下，三辆插电式混合动力客车将在瑞典哥德堡进行测试。其核心技术与目前的沃尔沃混合动力客车基本相同，即对制动能量进行回收并用于电机供电。不同之处在于该车使用了一种新型电池和充电装置，     

沃尔沃插电式混合动力客车节省油耗81%

<正>沃尔沃插电式混合动力客车技术特点:·客车安装了—个锂电瓶驱动的电机,它还有—个小型柴油机。·客车通过安装在车顶的能源储存单元从电源充电,充电耗时5-6分钟。·该客车在电能驱动下能行驶7公里,无任何噪音和排放。在哥德堡场地试验的结果显示,沃尔沃插电式混合动力客车超过了预期,每100公里消耗燃油不到11L,比同款的柴油客车的油耗要少81%。包括柴油和电能的总体能耗,与相应的欧5柴油客车相比,插电式混合动力客车的能源节省达到61%。哥德堡的场地试验于2013年6月开始,涉及三台插电式混合动力客车,     

插电式混合动力车前景光明

什么是插电式混合动力车? 插电式混合动力车是一种在常规情况下可从非车载装置中获取电能的、优先在纯电动模式下行驶的混合动力的电动汽车. 插电式混合动力车就驱动原理和驱动单元而言,都与传统燃油动力与电驱动结合的混合动力汽车相差无几,然而它有如下突出的特点: 1.插电式混合动力车蓄电池包可以直接从外接电源(包括家用220V电源)充电.从这点上看,它像一辆纯电动汽车,通常优先在纯电动模式下独立行驶,一般由外接公共电网电源充电补充电能.     

插电式混合动力客车电能消耗阶段控制策略的研究

在分析了插电式混合动力客车不同的运行模式的基础上,根据单轴并联的插电式混合动力结构形式,提出一种插电式混合动力客车电能消耗阶段的能量管理(包括能量分配和换挡规律协调)控制策略。采用遗传算法对换挡协调控制参数进行优化,得到最优的能量分配和换挡系统控制策略,通过台架测试和仿真分析,验证了控制策略的可行性。     

插电式混合动力电动城市客车的最佳纯电动模式续驶里程研究

分析插电式混合动力电动城市客车在不同纯电动模式续驶里程下的油耗、能耗与排放,指出其最佳纯电动模式续驶里程,为科学地设计插电式混合动力电动城市客车提供参考。     

伴随发动机起动的混合动力模式切换控制

插电式混合动力客车有两种动力源,不同动力源之间切换会导致纵向冲击,影响车辆的动力性和舒适性。以同轴并联混合动力客车为研究对象,分析了其从纯电动模式向混合驱动模式的动态切换过程,基于状态空间理论将模式转换过程划分为4个子状态,设计了动态协调控制策略。以整车运行纵向冲击度和模式切换时间为评价指标,通过台架实验对所提出的动态协调控制策略进行验证,并与传统的电机转矩补偿策略进行对比,实验结果表明,所设计的控制策略有效抑制了转速波动,缩短了模式切换时间,减小了整车纵向冲击度,改善了驾驶性能。     

新政驱动插电式混合动力汽车开拓未来

随着我国社会经济的不断发展,石油的过度消耗和环境问题日益突出,发展新能源汽车将逐渐成为我国汽车的发展趋势.文章分析了插电式混合动力汽车的市场情况、国家新能源政策支持、性能优势以及国内插电式混合动力客车的技术领先水平,同时阐述了我国发展插电式混合动力汽车的可行性和发展前景.     

插电式混合动力汽车双离合动力系统发动机启动优化分析

针对插电式混合动力汽车动力系统双离合器的结构特点,对纯电动工作模式切换到发动机单独驱动模式的过程进行力学特性研究。在Matlab/Simulink平台建立动力学仿真模型,以变速器速比、目标结合转速、发动机启动特性为变量着重分析离合器的接合特性以及冲击度,通过调节发动机在不同初始工况下的启动特性优化插电式混合动力汽车工作模式切换的平顺度。结果表明,提出的发动机启动特性能够有效提高工作模式切换的平顺度,降低离合器的冲击度。     

Powertrain system optimization for a heavy-duty hybrid electric bus

This research concerns the design of a powertrain system for a plug-in parallel diesel hybrid electric bus equipped with a continuously variable transmission (CVT) and presents a new design paradigm for the plug-in hybrid electric bus (HEB). The criteria and method for selecting and sizing powertrain components equipped in the plug-in HEB are presented. The plug-in HEB is designed to overcome the vulnerable limitations of driving range and performance of a purely electric vehicle (EV), and it is also designed to improve the fuel economy and exhaust emissions of conventional buses and conventional HEBs. Optimization of the control strategy for the complicated and interconnected propulsion system in the plug-in parallel HEB is one of the most significant factors for achieving higher fuel economy and lower exhaust emissions in the hybrid electric vehicle (HEV). In this research, the proposed control strategy was simulated to prove its validity using the ADVISOR (advanced vehicle simulator) analysis simulation tool.     

Economic value and utility of a powertrain system for a plug-in parallel diesel hybrid electric bus

This research is the first to develop a design for a powertain system of a plug-in parallel diesel hybrid electric bus equipped with a continuously variable transmission (CVT) and presents a new design paradigm of the plug-in hybrid electric bus (HEB). The criteria and method for selecting and sizing powertrain components equipped in the plug-in HEB are presented. The plug-in HEB is designed to overcome the vulnerable limitations of driving range and performance of a purely electric vehicle (EV) and to improve fuel economy and exhaust emissions of conventional bus and conventional HEBs. The control strategy of the complicated connected propulsion system in the plug-in parallel HEB is one of the most significant factors in achieving higher fuel economy and lower exhaust emissions of the HEV. In this research, a new optimal control strategy concept is proposed against existing rule-based control strategies. The optimal powertrain control strategy is obtained through two steps of optimizations: tradeoff optimization for emission control and energy flow optimization based on the instantaneous optimization technique. The proposed powertrain control strategy has the flexibility to adapt to battery SOC, exhaust emission amount, classified driving pattern, driving condition, and engine temperature. The objective of the optimal control strategy is to optimize the fuel consumption, electricity use, and exhaust emissions proper to the performance targets. The proposed control strategy was simulated to prove its validity by using analysis simulation tool ADVISOR (advanced vehicle simulator).     

插电式四驱强混汽车整车控制策略开发

在介绍和分析四驱强混系统架构和零部件功能特性的基础上,系统地提出了插电式四驱强混汽车的整车控制策略开发方法,包括考虑整车舒适性的减振控制、整车经济性的再生制动控制和整车驱动模式的切换、AMT换挡控制等策略。由Matlab/Simulink搭建整车控制策略模型并生成代码,目前策略已在奇瑞自主开发的整车控制器上得以实现,并完成了在整车仿真平台上的仿真验证和在插电式混合动力样车上的试验验证,通过对试验数据的分析,验证了该控制策略的可行性。     

From Offline to Adaptive Online Energy Management Strategy of Hybrid Vehicle Using Pontryagin’s Minimum Principle

This paper details the development of an energy management strategy (EMS) for real-time control of a multi hybrid plug-in electric bus. The energy management problem has been formulated as an optimal control problem in order to minimize the fuel consumption of the bus drivetrain for a typical day of operation. Considering the physical characteristics of the studied hybrid electric bus and its well-known daily tour, the Pontryagin’s minimum principle (PMP) is firstly used as the mean to obtain offline optimal EMS. Afterward, in order to adapt the proposed strategy for real-time implementation, the proposed control parameters are adapted online using feedback from the battery state of energy (SOE) which allows us to accurately control the battery SOE in the presence of wide range of uncertainties. The work proposed in this paper is conducted on a dedicated high-fidelity dynamical model of the hybrid bus, that was developed on MATLAB/TruckMaker software. The performance evaluation of the proposed strategy is carried out using a normalized driving cycles to represent different driving scenarios. Obtained results show that among the investigated methods, it is reasonable to conclude that the proposed adaptive online strategy based on PMP is the most suitable to design the targeted EMS.     

插电式并联混合动力客车建模及仿真

基于Advisor软件中并联混合动力客车仿真模型,建立插电式并联双离合器混合动力客车仿真模型,并对发动机、电机、传动系和电池等进行参数匹配;分析电力辅助控制策略,利用正交设计对其控制参数进行优选研究。仿真结果表明,动力系统主要参数及整车控制策略设计合理,满足整车性能要求。     

Control strategy for clutch engagement during mode change of plug-in hybrid electric vehicle

The plug-in hybrid electric vehicle (PHEV) has various driving modes used in both internal combustion engine and electric motors. The EV mode uses only an electric motor and the HEV mode uses both an engine and an electric motor. Specifically, when the PHEV of a pre-transmission parallel hybrid structure performs mode changing, its engine clutch is either engaged or disengaged, which is important in terms of ride comfort. In this paper, to enhance the mode changing process for the clutch engagement, a PHEV performance simulator is developed using MATLAB/Simulink based on system dynamics and experiment data. Vehicle driving analysis is carried out of the control logic and properties of the mode changing. A compensated torque is applied during the mode change. This results in the rapid speed synchronization with the clutch although the trade-off relationship of the mode change. In addition, the mode changing is conducted through the transmission shifting process to rapidly synchronize with speed. The control strategy implemented in this study is shown to improve the drivability and energy efficiency of a PHEV.     

Simulation of a powertrain system for the diesel hybrid electric bus

The plug-in hybrid electric bus (HEB) is designed to overcome the vulnerable driving range and performance limitations of a purely electric vehicle (EV) and have an improved fuel economy and lower exhaust emissions than those of a conventional bus and convention HEBs. The control strategy of the plug-in parallel HEB??s complicated connected propulsion system is one of the most significant factors for achieving a higher fuel economy and lower exhaust emissions than those of the HEV. The proposed powertrain control strategy has flexibility in adapting to the battery??s state of charge (SOC), exhaust emissions, classified driving patterns, driving conditions, and engine temperature. Simulation is required to model hybrid powertrain systems and test and develop powertrain control strategies for the plug-in parallel HEB. This paper describes the simulation analysis tools, powertrain components?? models and modifications, simulation procedure, and simulation results.     

混合动力客车与充电式混合动力客车仿真对比研究

为了降低客车排放,提高其燃油经济性,研究了混合动力客车的燃油消耗率。开发了柴油机模型和公交道路循环模型。以燃油消耗率和排放为主要评估指标,在ADVISOR软件中利用新开发的模型分别对混合动力客车和充电式混合动力客车进行了仿真。仿真分析的结果表明：在公交路况下,充电式混合动力客车的燃油经济性优于混合动力客车,油耗降低62％。     

混合动力客车循环工况下燃料经济性分析

在分析某混合动力客车的多种工作模式和循环工况的统计特性的基础上,给出最大能耗节约率计算方法.通过建立等效燃料消耗率的概念,详细分析各典型工况对该车燃料经济性的贡献率.最后提出混合动力城市客车控制策略制定的若干建议.     

HFF6140K07CHEV插电式混合动力客车整车开发

简要介绍HFF6140K07CHEV插电式混合动力客车整车的开发、驱动控制系统的设计及整车动力电池组布置技术方案。