基于Matlab的并联混合动力汽车性能指标估算

本文结合混合动力汽车理论和反向仿真思想，利用Matlab软件建立了并联混合动力汽车的仿真模型，实现了对混合动力汽车能量效率、动力性和经济性评价指标的估算，为国内进行并联混合动力汽车性能指标估算提供了参考。同时本文提出的关于混合动力汽车能量效率的定义和估算方法，可以利用仿真模型方便地实现该评价指标的估算，该估算方法具有一定的实用性和方便性。     

双排行星齿轮机构在混合动力汽车上的应用研究

提出动力复合装置应用于混合动力汽车所应具有的功能,分析表明一种双排行星齿轮机构可以工作在混合动力汽车的多种工作模式下,建立此行星齿轮机构的动力学方程,基于ADVISOR进行仿真,仿真结果表明双排行星齿轮机构能有效的实现两种动力的复合。     

并联式混合动力汽车自动变速耦合器设计

为满足研发需要,设计了一种新型的混合动力汽车(HEV)自动变速耦合器。从耦合装置的功能分析入手,确定动力总成耦合方案,对关键零部件进行选材和尺寸参数设计,完成耦合器的Pro/E建模并给出三维实体模型,最后进行了强度校核分析。结果表明,设计的HEV自动变速耦合器结构紧凑、体积小且质量轻,集动力耦合功能和自动变速功能于一体,能够满足设计需求。通过三维模型与计算分析的有机结合,加快了HEV零部件的研发进程,有效降低了研发成本。     

基于上海市区道路行驶工况的混合动力汽车性能仿真研究

文章基于上海市区道路行驶循环进行了混合动力汽车的燃油经济性能仿真研究。具体内容包括动力部件的选型、控制策略的制定以及对混合动力汽车性能仿真结果的研究分析。在理论上阐述了改善混合动力汽车燃油经济性的方法以及混合动力汽车相对于传统燃油汽车的显著优势,为控制策略的具体制定奠定了基础。     

混合动力汽车行驶工况的仿真分析

汽车的实际行驶条件对汽车性能具有直接影响。对于混合动力汽车,其部件的选型以及控制策略的制定都与道路行驶工况密切相关文章对汽车行驶工况做了相应的分析．利用GT—DRIVE软件对某微型混合动力汽车进行了建模与仿真仿真结果表明,在经济性方面混合动力汽车比传统汽车有明显的优势．如何更好地分配混合动力汽车功率将是混合动力汽车研究的重点.     

混合动力汽车动力系统设计及仿真

对混合动力汽车的驱动系统选型设计进行了详细的研究,合理地制定了整车控制策略.通过仿真软件Advisor2002,基于常用城市工况CYC-NEDC对该混合动力汽车进行了仿真.结合仿真结果,对其动力性能、排放性能以及电池的充放电状态进行了研究分析.     

混合动力电动汽车性能试验与仿真

混合动力汽车因其兼有电动车的低排放优点与内燃机汽车的高比能量优点而越来越受到关注，成为竞相研发的新型车辆之一，本通过在一款富康款车上并用混合动力的实例，对汽车的各项性能指标与能量消耗的各项试验数据与车辆仿真程序计算结果进行了详细的分析，提出了锂电池混合动力电动汽车在中国城市内运行的可能性。     

混合动力车用飞轮电池可行性分析及性能仿真

通过对飞轮电池能量特性的研究计算并综合考虑其使用成本,分析了其在混合动力汽车上应用的可行性.基于MATLAB/Simulink建立飞轮电池模型并仿真,根据飞轮电池的能量特性将飞轮转速限制在低能量损耗区间内.仿真结果表明,飞轮电池的能量特性适用于混合动力汽车,相关储能状态参数的引入使飞轮电池的能量储存状态可以通过对飞轮瞬时转速的测量进行精确计算,从而更加有利于混合动力系统的综合控制.     

混合动力汽车发动机启动过程研究

随着汽车行业的不断发展,传统燃油汽车已经逐渐无法满足市场的发展需求,混合动力汽车在汽车市场中不断占据着越来越多的市场销售份额。发动机启动是混合动力汽车双驱动系统运行的关键,通过对混合动力汽车发动机启动过程中的相关参数数据进行研究调整能够有效的提高发动机启动效率。因此本文将通过混合动力汽车发动机启动过程、阻力矩特性、混合动力汽车发动机启动仿真模型以及影响因素等几个方面内容对其进行具体的研究分析。     

串联式混合动力公交车动力系统控制策略仿真研究

本文针对目前国内外混合动力汽车的发展现状,结合城市路况和城市客车运行的特点,对混合动力公交车动力总成的控制策略进行了分析和研究,运用混合动力电动汽车仿真软件ADVISOR对串联混合动力城市客车控制方案进行了整车性能仿真分析,结果表明,该控制策略对于提高汽车燃油经济性具有积极作用。     

Component Sizing of Parallel Hybrid Electric Vehicle Using Optimal Search Algorithm

In designing a parallel hybrid electric vehicle, it is essential to select the optimal capacity of power sources and the optimal gear ratio of the torque coupler. The capacity of the power sources and the gear ratio of the torque coupler should be optimized simultaneously. However, since this process is excessively time-consuming, previous studies have selected the gear ratio of the torque coupler and then selected the capacity of power source. However, this approach cannot guarantee global optimization. In this paper, a feasible region is defined to satisfy the required performance of vehicle such as maximum speed, hill-climbing. and feasible points are selected inside the feasible region. In the conventional technique, the global optimal solution is obtained by simulating all feasible points. In the optimization technique, optimal points are simulated within the feasible region using several optimal search algorithms, such as the golden section search algorithm and the hillclimbing search algorithm. And using these algorithms, the number of simulations is reduced and the capacity of the power source and the gear ratio of the torque coupler are optimized simultaneously. Finally, the validity of the component sizing results is verified by comparing the global optimal solution obtained by applying the conventional technique with the solution obtained by applying the proposed optimization technique.     

4WD汽车应用粘性联轴器分析

粘性联轴器这一新装置以其独有的特性在四轮驱动汽车上得到广泛应用，粘性联轴器一经确定结构，即可通过转速差自动调节传递转矩的特性，分析了四轮驱动汽车采用粘性联轴器的可能性，介绍了采用粘性联轴器连接的四轮驱动形式和工作原理，阐述了汽车速度，轮胎滑移率对粘性联轴器转速差的影响。     

新型混联式混合动力系统的动力合成装置

混联式混合动力最重要的技术是结构紧凑、高效率的动力复合装置,文章介绍一种新的集离合、动力合成、变速功能于一体的双离合自动变速动力耦合器。     

Freight cars shunting impacts analysis using an improved dynamic model of friction draft gear

In this study, simulations of shunting impacts for groups of freight cars that include up to six cars are considered. The simulation technique employs a white-box improved dynamic model of friction draft gear considering all its components and detailed finite element models of the freight cars. The key differences between the one-to-one shunting impact and the impact of long groups of cars in terms of features of the draft gear deflections and the coupler force time history are discussed. We present an example of dynamic finite element analysis for the car body using the coupler force time history obtained from the shunting impact simulation.     

Modelling polymer draft gears

This paper developed a new and simple approach to model polymer draft gears. Two types of polymer draft gears were modelled and compared with experimental data. Impact characteristics, in-train characteristics and frequency responses of these polymer draft gears were studied and compared with those of a friction draft gear. The impact simulations show that polymer draft gears can withstand higher impact speeds than the friction draft gear. Longitudinal train dynamics simulations show that polymer draft gears have significantly longer deflections than friction draft gears in normal train operations. The maximum draft gear working velocities are lower than 0.2?m/s, which are significantly lower than the impact velocities during shunting operations. Draft gears’ in-train characteristics are similar to their static characteristics but are very different from their impact characteristics; this conclusion has also been reached from frequency response simulations. An analysis of gangway bridge plate failures was also conducted and it was found that they were caused by coupler angling behaviour and long draft gear deflections.     

The stability and mechanical characteristics of heavy haul couplers with restoring bumpstop

To investigate the stability and mechanical characteristics of a type of heavy haul coupler with restoring bumpstop, the geometry and force states of couplers were analysed at different yaw angles and the longitudinal forces. The structural characteristics of this coupler were summarised. To aid in the investigation, a multi-body dynamics model with four heavy haul locomotives and three detailed couplers was established to simulate the process of emergency braking. In addition, the coupler yaw instability and lateral forces were tested in order to investigate the effect of relevant parameters on the locomotive's wheelset lateral forces. The results show that only when the bumpstop force exceeds half of the coupler longitudinal compression force, can the follower be rotated and the yaw angle of the coupler increase. The bumpstop preload is the most important stabilising factor. The coupler lateral force is constant when the coupler longitudinal force is smaller than the critical values of 2000, 1400 and 1150 kN at coupler free angles of 7°, 8° and 9°, respectively, for operation on straight track. The coupler free angle and the locomotive's lateral clearance of the secondary stopper are important in decreasing the wheelset lateral forces of the locomotive. It is advised that a smaller locomotive's secondary lateral suspension stiffness, a free clearance of 35 mm and an elastic clearance of 15 mm from the secondary lateral stopper be selected. If the coupler's free angle is less than the self-stabilising angle which is 5.5° for operation on straight track, the coupler is stable no matter how great the longitudinal force is. The wheelset lateral forces are allowed at the coupler longitudinal force of 2500 kN when the free angle is 6°. These studies establish meaningful improvements for the stability of couplers and match the heavy haul locomotive with its suspension parameters.     

汽车信号灯监测装置的设计

以8031单片机为控制系统,采用金属式应变片传感器和光电耦合器作为检测元件,将检测信号传送到由8031单片机,外加2732芯片构成4KB的外扩展程序存储器和74IS373作为地址锁存器所构成的单片机控制系统,监测汽车信号灯的工作状态.当汽车信号灯出现故障时,通过LED发光二极管和小功率电喇叭发出报警信号.     

The stability mechanism and its application to heavy-haul couplers with arc surface contact

To investigate the stability mechanism of a type of heavy-haul coupler with arc surface contact, the force states of coupler were analysed at different yaw angles according to the friction circle theory and the structural characteristics of this coupler were summarised. A multi-body dynamics model with four heavy-haul locomotives and three detailed couplers was established to simulate the process of emergency braking. In addition, the coupler yaw instability was tested in order to investigate the effect of relevant parameters on the coupler stability. The results show that this coupler exhibits the self-stabilisation and less lateral force at a small yaw angle. The yaw angle of force line is less than the actual coupler yaw angle which reduces the lateral force and the critical instability. An increase in the friction coefficient of the arc contact surfaces can improve the stability of couplers. The friction coefficient needs to be increased with the increase in the maximum coupler longitudinal compressive force. The stability of couplers is significantly enhanced by increasing the secondary suspension stiffness and reducing the clearance of the lateral stopper of the locomotives. When the maximum coupler compressive force reaches 2500 kN, the required friction coefficient reduces from 0.6 to 0.35, which notably lowers the derailment risk caused by the coupler. The critical instability angle of the coupler mainly depends on the arc contact friction coefficient. When the friction coefficient is 0.3, the critical instability angle was 4–4.5°. The simulation results are consistent with the locomotive line tests. These studies establish meaningful improvements for the stability of couplers and match the heavy-haul locomotive with its suspension parameters.     

混合动力汽车用行星齿轮机构的理论研究与仿真分析

对差动行星齿轮动力分配装置进行了详细的计算分析,确定了分析计算行星排特征参数p的一般方法。从混合动力汽车特点出发,定量计算动力部件同行星齿轮系统中3个构件的6种不同连接关系,确定其作为动力分配装置的最佳型式。在此基础上,分析了混合动力汽车各动力部件的性能特征,分别对发动机、电动机、发电机和蓄电池进行了选型及建模,并完成了仿真计算。     

Effect of arc surfaces friction coefficient on coupler stability in heavy haul locomotives: simulation and experiment

The heavy haul coupler/buffer system equipped with arc surfaces on the coupler tail and the follower is widely applied to connect the locomotives and wagons. As one of the most important parameters, arc surfaces friction coefficient plays a key role in coupler instability, which threatens the safety of trains. To investigate the effect of arc surfaces friction coefficient on coupler stability, a simulation model adopting the latest modelling methods is established and field tests employing the locomotives equipped with different friction coefficients are conducted. The results show that the friction coefficient of arc surfaces can affect the coupler yaw angle remarkably. Increasing the friction coefficient can improve the coupler stability. However, under severe compressive force condition, the increased friction coefficient can be reduced quickly, which calls for further attention.