汽车制动管路螺纹紧固件的扭矩试验

螺纹紧固件扭矩测试设备是一种确定管路连接件关键特性的工具,可以获得制动管连接系统的关键信息。文章介绍了一种应用汽车管路联接扭矩测试仪分析拧紧力矩、轴向预紧力和转角之间关系的试验方法,通过试验分析和结果验证表明,该测试仪对管路连接拧紧状态的测试结果,确定新的管路连接接头和表面涂层的可靠性,该试验方法提供了保证管路连接有效性的判断依据。     

汽车综合性能测试仪的研制

介绍了一种能测试汽车动力性，制动性，车轮侧滑量和发动机动力性，以及进行车速表校验的新型汽车综合性能试仪。阐述了该测试仪的测试原理与测试参数，测试仪的结构，测试仪控制系统的硬件配置及软件设计。     

商用车和挂车防护及制动力综合测试仪研制

为了提高汽车实验室和仪器设备利用效率及准确性,需研制货车和挂车防护及静态制动力多功能测试仪,检测前和侧后防护装置、车架强度及静态纵向制动力,解决重型汽车静态制动力测量少、设备短缺和昂贵问题,提高汽车轮胎性能和动态安全性;减少投资风险和交通事故率,保证技术员、车辆和危险及贵重运输物资安全。     

车门铰链螺栓静态扭矩计算方法

对螺栓动、静态扭矩进行阐述,采集静态扭矩数据,运用SPC和3Sigma方法确定静态扭矩的控制范围。结合得到的静态扭矩控制范围和实际生产经验,总结出一种计算静态扭矩控制范围的经验方法,并在实际检测中得到验证,可在保证螺栓装配质量的前提下,提高生产效率。     

整车制造过程中总装对试制样车静态扭矩管理

目前总装厂对于试制样车扭矩的管理直接沿用量产车辆的管理标准,导致试制样车静态扭矩检测频繁发生不合格现象,给样车扭矩开发带来极大困扰。文章对试制样车的零件特点、装配方式、扭矩检测方法进行探究,提出采用丰田汽车的扭矩经验公式制定试制样车的静态扭矩标准,以满足总装对试装样车扭矩检测的需求,对整车制造有一定的借鉴意义。     

风动扳手扭矩检测的传感器原理与试验

针对旋转速度高，冲击性强的定扭径风动扳手，采用旋转轴扭矩测量原理，研究改制了一种新型的电刷式集流环传感器，淫以动态检测的扳手的停止扭矩。并利用一元线性回归对传器的静态特性进行了分析。     

动力转向技术与市场发展(三)

六、Prius混合动力汽车的电动动力转向 丰田汽车公司开发的Prius混合动力汽车采用了新型的电动动力转向。图17表示其构成。电动动力转向基本上与通常的电液动力转向系有所相似,它是由电机、减速装置、各种传感器(特别是检测转向轴扭矩的扭矩传感器)及各种功能控制用微机等系统构成。 电动动力转向最重要的部件是齿轮齿条式转向机构,为了使其工作,必须获得来自扭矩传感器、电机、车轮速度传感器的信息。电动动力转向控制用微机计     

拖曳扭矩测试在变速器工厂DCT EOL中的应用

DCT变速箱在运转时,因为传动系摩擦、搅油、打滑等,会产生动力损失。文章通过对DCT动力损失的分析,提出变速箱拖曳扭矩的组成,分析对其测试影响的6大因素,设计其测试和评价方法,完成变速器工厂DCT EOL拖曳扭矩的测试及判定。     

整车状态下发动机瞬态动力输出的测试研究

车辆行驶条件下,发动机运行参数复杂多变,以瞬态工况为主,其瞬态动力输出一般通过CAN线读取,无法精确测量。文章通过对发动机燃烧原理和摩擦理论的研究,提出了通过缸压传感器检测瞬时缸压及建立发动机摩擦扭矩模型来计算发动机瞬态输出扭矩的方法,并使用发动机台架稳态和瞬态两种试验对本计算模型进行验证。试验结果表明:该方法操作简单,精度高,最高相对误差仅为1.65%,具有很高的可行性,为实现整车路试工况瞬态动力性能测试、校正CAN读取的瞬态动力输出值、竞品车整车状态下瞬态动力性能测试提供了理论指导和技术支撑。     

基于振动剂量值和动力中断时间的换档控制优化

针对电控机械式自动变速器(AMT)换档时扭矩卸载和加载速度进行优化。以某插电式混合动力汽车为研究对象,介绍了该混合动力汽车的动力系统结构和换档时扭矩控制过程。提出了基于振动剂量值和动力中断时间的换档品质客观评价指标,以此为基础对换档过程的扭矩控制进行优化。测试结果显示,优化以后的换档品质优于主流AMT车型。     

军用电站AVR检测仪设计

针对AVR在实际中装在电站上进行检测而带来的效率低、磨损等诸多问题,设计了一种可脱离电站工作环境的AVR检测仪。该检测仪通过模拟电站提供的激励信号,配合虚拟三用表和示波器,能够对AVR进行快速的检测和故障诊断。通过实际使用表明,该检测仪节省了检测成本,提高了检测效率。     

汽车制动鼓静平衡微机测试仪的研制

根据力学静平衡原理，采用传感器技术、微机接口技术、计算技术和机电一体化设计，研制成功了汽车制动鼓静平衡测试仪。该测试仪使用灵活、测试精度高。介绍了该测试仪的测试原理、仪器结构和软件流程，并对测量误差进行了分析。     

Methodology for bus structure torsion stiffness and natural vibration frequency prediction based on a dimensional analysis approach

Engineering bus design requires testing of bus structures prototypes in order to guarantee a certain level of strength and an appropriate static and dynamic behavior of the bus superstructure when exposed to road loads. However, experimental testing of real bus structures is very expensive as it requires expensive resources and space. If testing is done on a scale bus model the previous required expenses are considerably reduced. Therefore, a novel methodology based on dimensional analysis applied to bus structure prediction to evaluate the bus structure static and dynamic performance is proposed. The static performance is evaluated attending to torsion stiffness and the dynamic in terms of the natural vibration frequencies and rollover threshold. A scale bus has been manufactured and dimensionless parameters have been defined in order to project the results obtained in the scale bus model to a larger model. Validation of the proposed methodology has been carried out under experimental and finite element analysis.     

轿车后扭梁轴扭杆优化

本文通对某轿车后扭梁轴扭杆的有限元和动力学分析,在保证强度和性能的基础上找出最优的后扭梁轴扭杆方案。     

全承载大型客车车身骨架梁单元与壳单元模型有限元计算对比

建立某款全承载大客车车身骨架梁单元、壳单元有限元模型并分析计算,对比模态、扭转静刚度和静强度分析结果并进行了试验验证。从反映整车性能的模态和扭转静刚度分析结果看,两种模型吻合较好,且与试验结果的相对误差小;从反映整车局部性能的静强度分析结果看,两种模型计算结果存在差异,壳单元模型计算结果与试验结果较吻合,梁单元模型计算得到的应力值普遍低于试验结果。     

某货车驾驶室静刚度试验与分析（续完）

针对某型货车驾驶室,建立了该驾驶室白车身静刚度测试系统。试验和分析结果表明,该测试系统方案合理有效,试验数据重复性和对称性好。通过测试分析该驾驶室扭转和弯曲刚度,得以了驾驶室扭转和弯曲工况下各测点的变形情况和静刚度特征,为该驾驶室的研发建立了基础数据。     

基于虚拟仪器的军用电站谐波测试研究

军用电站的输出电能谐波指标是影响武器装备性能的一个重要指标,本系统将虚拟仪器技术应用于军用电站谐波测试,可以根据国军标的要求对谐波指标（THD）进行测试并得出结论,介绍了基于LabWindows／CVI的军用电站谐波分析仪的硬、软件设计,并详细讨论了谐波测试的算法及实现。     

车用汽油发动机动力性与机械损失功率的快速检测

本文阐述了无外载惯量加速测功原理，指出了国内现有同类仪器存在的问题。提出了采用油门定开度、多次自由加、减速测量在用汽车发动机动力性与机械损失功率的方法，从而提高测量精度，获得重复性的测试结果。     

Investigation of active torsion bar actuator configurations to reduce vehicle body roll

The increasing popularity of sport utility/light-duty vehicles has prompted the investigation of active roll management systems to reduce vehicle body roll. To minimize vehicle body roll and improve passenger comfort, one emerging solution is an active torsion bar control system. The validation of automotive safety systems requires analytical evaluation and laboratory testing prior to implementation on an actual vehicle. In this article, a computer simulation tool and accompanying hardware-in-the-loop test environment are presented for active torsion bar systems to study component configurations and performance limits. The numerical simulation illustrates that the hydraulic cylinder extension limits the active torsion system’s ability to provide body roll angle reduction under various driving conditions. To compare the control system’s time constant and body roll minimization capabilities for different hydraulic valve assemblies and equivalent hose lengths, an experimental test stand was created. For a typical hydraulic pressure and hose diameter, the equivalent hose length was not a key design variable that impacted the system response time. However, the servo-valve offered a quicker transient response and smoother steady-state behavior than the solenoid poppet actuators that may increase occupant safety and comfort.     

Investigation of active torsion bar actuator configurations to reduce vehicle body roll

The increasing popularity of sport utility/light-duty vehicles has prompted the investigation of active roll management systems to reduce vehicle body roll. To minimize vehicle body roll and improve passenger comfort, one emerging solution is an active torsion bar control system. The validation of automotive safety systems requires analytical evaluation and laboratory testing prior to implementation on an actual vehicle. In this article, a computer simulation tool and accompanying hardware-in-the-loop test environment are presented for active torsion bar systems to study component configurations and performance limits. The numerical simulation illustrates that the hydraulic cylinder extension limits the active torsion system's ability to provide body roll angle reduction under various driving conditions. To compare the control system's time constant and body roll minimization capabilities for different hydraulic valve assemblies and equivalent hose lengths, an experimental test stand was created. For a typical hydraulic pressure and hose diameter, the equivalent hose length was not a key design variable that impacted the system response time. However, the servo-valve offered a quicker transient response and smoother steady-state behavior than the solenoid poppet actuators that may increase occupant safety and comfort.