12 m氢燃料电池城市客车电电混合动力系统设计方案

介绍一款12m氢燃料电池城市客车动力系统的设计方案,论述其电电混合动力系统构型、液冷动力锂电池系统、整车控制系统等设计及整车性能仿真分析。     

浅议汽车混合动力系统的布置

由于电池技术的制约，纯电动汽车的发展受到了重重的阻碍，复式动力汽车结合传统汽车和纯电动汽车二者的优点，达到了提高燃油经济性和减少排放的目的，因而很具发展前景，本文阐述了汽车混合动力系统的各种布置方案。     

福特汽车公司的混合动力车

目前，福特汽车公司展示了其第一辆插电式燃料电池混合动力车。该车结合了车载氢燃料电池发电机和锂离子蓄电池，每100km燃用5．74L燃料而排放为0。它以一种灵活的动力系统结构为基础，只需对燃料和驱动技术稍加更新而不必重新设计车辆及其控制系统。     

马自达氢转子混合动力车在日本投入商用

3月31日，马自达正式启动Mazda5氢转子发动机混合动力车的商业租赁。首批用于商业租赁的车辆已于3月25日在日本获得车牌。Mazda5氢转子发动机混合动力车搭载了由氢转子发动机和电动马达组成的串联式混合动力系统，续航里程为200km，最大输出功率达110kW。该车还采用双燃料系统，可在氢燃料不足时转换为汽油驱动。     

燃料电池城市客车电电混合动力系统研究

对电电混合燃料电池城市客车在不同工况下的输出性能和匹配特性进行分析,研究电电混合动力系统在各种工况下的能量管理策略。表明动力电池可以保障燃料电池系统在平稳状态工作,显著延长燃料电池工作寿命,节约成本,提高整车可靠性。     

氢燃料电池增程式混合动力系统概念设计

设计一种氢燃料电池增程式混合动力系统,阐述其基本构造和工作原理,并对该系统的控制策略进行分析,最后对该系统进行主要参数计算和总体布置。     

丰田混合动力车销量突破50万辆

截至2005年10月底，丰田汽车公司的节能环保型混合动力汽车的累计销售量已达到51.33万辆。该公司还计划从2006年开始将第二代混合动力系统配备在部分高档车上，使更多的消费者有机会选用这种节能环保轿车。     

完美集成的经济型混合动力车

混合动力系统现在可以安装在已有的车辆之上，这种技术提供了一种切实可行、成本可以接受、底盘改动较小的清洁车辆方案     

传统轿车搭载混合动力系统整车技术

结合混合动力车工作原理,从动力系统、底盘、整车电子电器等方面,详细说明传统轿车改制成混合动力车所涉及到的整车技术。     

通向氢燃料未来的桥梁--氢发动机和其混合动力车

在开发氧动力领域，当今国际车坛的主攻方向是燃料电池车并取得了丰硕的成果，新车款不断涌现。从氢能的利用角度看，宝马则认为开发氢发动机更具现实主义。近年来，除宝马在各大车展上率先展示了装载氢发动机的多款轿车外，福特的氧发动机混合动力车和马自达的氢转子发动机跑车也先后推出。这些多种形式氢发动机车的成功开发向人们呈现出氢能广泛利用的美好前景。     

混合动力汽车动力总成试验台研究

基于混合动力汽车有串联、并联和混联等多种结构形式的特点,提出以模块化设计思想来搭建混合动力汽车动力总成试验台的方法,从而达到了在比较短的时间内、以尽量小的改动适应不同混合动力汽车动力总成结构形式组合需要的目标。根据研究需要,首先完成了混合动力汽车动力总成试验台并联形式的建设,并利用该试验台对所研制的混合动力城市客车多能源动力总成控制器进行了初步调试,验证了该控制器的软硬件设计和并联电动助力型控制策略。同时,所完成的发动机台架试验和电机台架试验也充分证明了试验台模块化设计思想的可行性和有效性。     

Extended-Kalman-filter-based regenerative and friction blended braking control for electric vehicle equipped with axle motor considering damping and elastic properties of electric powertrain

Because of the damping and elastic properties of an electrified powertrain, the regenerative brake of an electric vehicle (EV) is very different from a conventional friction brake with respect to the system dynamics. The flexibility of an electric drivetrain would have a negative effect on the blended brake control performance. In this study, models of the powertrain system of an electric car equipped with an axle motor are developed. Based on these models, the transfer characteristics of the motor torque in the driveline and its effect on blended braking control performance are analysed. To further enhance a vehicle's brake performance and energy efficiency, blended braking control algorithms with compensation for the powertrain flexibility are proposed using an extended Kalman filter. These algorithms are simulated under normal deceleration braking. The results show that the brake performance and blended braking control accuracy of the vehicle are significantly enhanced by the newly proposed algorithms.     

Performance analysis of a CVT clutch system for a hybrid electric vehicle

In this study, the performance of a CVT clutch system for a hybrid electric vehicle was investigated. To analyzed the vehicle performance at restart, the restart delay and driveshaft torque was investigated by simulations and experiments. It was found from the simulation results that the vehicle restart response depends on the clutch pressure buildup time to the point where the clutch torque begins to overcome the vehicle road load, and driving comfort at restart is directly related to the rate change of the clutch pressure.     

混合动力电动汽车技术现状及发展前景

混合动力电动汽车（HEV）已经成为当前汽车行业研究的热点。介绍了混合动力电动汽车的发展状况、动力系统的类型及特征,详细论述了混合动力电动汽车的关键技术,并对混合动力电动汽车的发展前景进行了探讨。     

ISG hybrid powertrain: a rule-based driver model incorporating look-ahead information

According to European regulations, if the amount of regenerative braking is determined by the travel of the brake pedal, more stringent standards must be applied, otherwise it may adversely affect the existing vehicle safety system. The use of engine or vehicle speed to derive regenerative braking is one way to avoid strict design standards, but this introduces discontinuity in powertrain torque when the driver releases the acceleration pedal or applies the brake pedal. This is shown to cause oscillations in the pedal input and powertrain torque when a conventional driver model is adopted. Look-ahead information, together with other predicted vehicle states, are adopted to control the vehicle speed, in particular, during deceleration, and to improve the driver model so that oscillations can be avoided. The improved driver model makes analysis and validation of the control strategy for an integrated starter generator (ISG) hybrid powertrain possible.     

Development of an auxiliary mode powertrain for hybrid electric scooter

This paper proposes a design and implementation of an auxiliary mode, hybrid electric scooter (HES) by means of more cost-effective way for improving scooter’s performance and efficiency. The HES is built in a parallel hybrid configuration with a 24V 370W auxiliary power electric motor, a 24V 20AH battery, and an electronically controlled fuel injection internal combustion engine (ICE) scooter. In contrast to hybrid electric vehicles (HEVs), the issues concerning cost, volume, and reliability are even more rigorous when developing hybrid electric scooters (HESs). Therefore, the drive topology and control strategy used in HEV cannot be applied to HES directly. In order to hasten the developing phase and achieve the parametric tune-up of the HES component, a dynamic simulation model for the HES is developed here. Because the powertrain system is complex and nonlinear in nature, the simulation model utilizes mathematical models in tandem with accumulated experimental data. The method about the mathematical model construction, analysis and simulation of the hybrid powertrain used in a scooter are fully described. The efficacy of the model was verified experimentally on a scooter chassis dynamometer and the performance of the proposed hybrid powertrain is studied using the developed model under a representative urban driving cycle. Finally, Simulation and experimental results confirm the feasibility and prosperity of the proposed hybrid HES and indicate that the designed hybrid system can improve the fuel consumption rate up to 15% compared with the original scooter.     

Development of fuel cell hybrid powertrain research platform based on dynamic testbed

An experimental research platform based on a dynamic testbed is developed and applied for fuel cell hybrid powertrain integration and control. A driver brake model is added to the dynamic testbed to simulate the braking process of an electric vehicle. Sub-systems of the fuel cell hybrid powertrain are tested, and characteristic parameters are obtained. A simulation platform is constructed in LabVIEW environment, and its validity is verified by dynamic test results. A real time control system is developed with an embedded PC for the function of rapid control prototyping. Using this platform, fuel cell battery hybrid and fuel cell supercapacitor hybrid configurations are investigated. This platform provides a powerful tool for fuel cell powertrain research and development.     

Vehicle dynamics control of an electric-all-wheel-drive hybrid electric vehicle using tyre force optimisation and allocation

ABSTRACT

Hybrid Electric Vehicles (HEV) offer improved fuel efficiency compared to conventional vehicles at the expense of adding complexity and at times, reduced total power. As a result, HEV generally lack the dynamic performance that customers enjoy. To address this issue, the paper presents a HEV with electric All-Wheel-Drive capabilities via the use of torque vectoring electric rear axle drive (TVeRAD) to power the rear axle. The addition of TVeRAD to a front wheel drive HEV improves the total power output. To improve the handling characteristics of the vehicle, the TVeRAD provides torque vectoring at the rear axle. A bond graph model of the drivetrain is developed and used in co-simulation with CarSim. The paper proposes a control system which utilises control allocation to optimise tyre forces. The proposed control system is tested in the simulation environment with a high fidelity CarSim vehicle model. Simulation results show the control system is able to maximise vehicle longitudinal performance while avoiding tyre saturation on low mu surfaces. More importantly, the control system is able to track the desired yaw moment request on a high speed double lane change manoeuvre through the use of the TVeRAD to improve the handling characteristic of the vehicle.     

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.     

电动汽车电气绝缘检测方法的研究

为了达到一定功率要求,电动汽车需要多个蓄电池串联使用,电池组的总电压一般高于100V,纯电动大型客车的电压高达500V,并且电动汽车的使用环境比较恶劣,由于振动、冲击、温度以及电池腐蚀性液体的影响。一旦因为绝缘性能下降导致高压系统出现问题,影响电动汽车的正常使用,文章从电动汽车的构成出发,探究绝缘性能下降的原因,并提出如何检测电气绝缘的方法。