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介绍变速器副箱气缸使用时漏气故障,通过对气缸加工、装配、设计,运用六西格玛方法进行调查分析,确定失效原因,制定改进方案,并将改进方案应用在实际生产中,跟踪售后数据,改进效果显著,故根据车型设计匹配、加工控制是降低气缸漏气故障的关键。 相似文献
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应用故障树分析方法对轮胎式装载机的主要部件--液力机械变速箱进行了分析,根据该部件的结构以及零部件失效与系统之间的逻辑关系,绘制了该部件的故障树,并通过结构函数表示了零部件状态对系统状态的影响.实践证明,故障树所表示的关系与实际使用中发生故障的情况是一致的. 相似文献
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铁道部四局四处1979年购置了8台日立建机UH14挖掘机,运转16000h后,陆续出现不同类型的故障,经过项修和局部部件国产化替代,又维持使用了5000h,发动机和液压系统频繁出现故障.经济性明显下降,甚至有4台长年爬窝,严重影响施工生产.为解决这个问题,我们通过认真探索,提出了挖掘机整机技术改造方案,充分发掘国产元件技术性能的优势,开辟改造进口机械的新途径. 相似文献
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针对某越野车辆分动箱油冷器侧边支架在整车可靠性路试中出现断裂故障,对其结构进行优化,使用CATIA软件进行三维建模,运用Hypermesh软件创建油冷器和侧边支架的有限元模型,在特定工况下,使用ANSYS软件对其进行约束模态、静强度和频率响应分析,对比改进方案、原方案分析结果,结果显示原方案应力较大处与实物断裂位置相同,并且改进方案满足设计要求。最后,在实车路试上对其进行可靠性验证,结果表明:优化后的侧边支架与新增的橡胶软垫组件组合使用通过了道路可靠性试验,满足整车使用要求。 相似文献
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根据客户提供的多桥重卡使用经验和企业技术研发需求,本设计提出用大流量蝶阀转向器、应急泵、应急阀以及控制系统组成应急安全方案,能够应对特定路况、突发设备故障等故障风险,从而达到保障重型设备能够平稳、可控、安全等指标.本方案设计已经运用于国内军用多桥重卡项目,整体运转效果非常优秀,同时针对部件设计中容易出现失效部位进行应力... 相似文献
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从实际出发,结合实际对汽油发动机和柴油发动机的一些常见故障进行了分析,并总结出了通过观察、接触、声音和气味等4种类型的判断方法,还提出了解决方法,为类似故障判断提供了参考。 相似文献
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《Vehicle System Dynamics: International Journal of Vehicle Mechanics and Mobility》2012,50(5):704-732
A fault classification method is proposed which has been applied to an electric vehicle. Potential faults in the different subsystems that can affect the vehicle directional stability were collected in a failure mode and effect analysis. Similar driveline faults were grouped together if they resembled each other with respect to their influence on the vehicle dynamic behaviour. The faults were physically modelled in a simulation environment before they were induced in a detailed vehicle model under normal driving conditions. A special focus was placed on faults in the driveline of electric vehicles employing in-wheel motors of the permanent magnet type. Several failures caused by mechanical and other faults were analysed as well. The fault classification method consists of a controllability ranking developed according to the functional safety standard ISO 26262. The controllability of a fault was determined with three parameters covering the influence of the longitudinal, lateral and yaw motion of the vehicle. The simulation results were analysed and the faults were classified according to their controllability using the proposed method. It was shown that the controllability decreased specifically with increasing lateral acceleration and increasing speed. The results for the electric driveline faults show that this trend cannot be generalised for all the faults, as the controllability deteriorated for some faults during manoeuvres with low lateral acceleration and low speed. The proposed method is generic and can be applied to various other types of road vehicles and faults. 相似文献
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在汽车制造各生产线中,重大停故障造成生产成本上升,生产效率下降。如何减少重大停故障的产生,是设备管理工作面临的一项挑战。通过集中治理60分钟以上故障,提升保全管理水平[1],开展前期管理,启动重大停应急预案等措施,使重大停发生次数大幅度下降。达到缩小停工时间、降低生产成本、提高生产效率的目的,对汽车制造企业设备管理工作具有一定参考意义。 相似文献
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摘要:故障诊断技术是汽车技术研究的热点之一,由于电动助力转向系统(EPS)和半主动悬架系统(SAS)已成为转向和悬架机构的发展方向,文章基于VB和SQLServer软件平台开发出底盘EPS与SAS故障诊断系统..利用专家系统的智能诊断功能,根据故障现象的观察和信号采集进行问诊操作,快速分析和查明原因并显示出故障原因与解决方法,通过故障诊断实例与实际故障的对比表明,开发的故障诊断系统能够对EPS与SAS的故障进行正确的诊断,从而为汽车底盘系统的故障诊断探索出一种有效和可行的方法。, 相似文献
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This paper presents a fault detection and diagnosis (FDD) method to enhance the reliability and safety for longitudinal control
of an autonomous all-terrain vehicle (ATV). An integrated approach using decentralized and centralized FDD is proposed to
optimize the tradeoff between sensitivity and robustness. While the decentralized approach is suitable for detecting faults
in actuators and sensors directly connected to a single processor, it is sensitive to noises and disturbances and thus may
result in false alarms. On the other hand, the centralized approach is based on information communicated between multiple
processors, and it detects and diagnoses faults through analyzing concurrent computations of multiple hardware modules. However,
its performance is still limited to isolating faults specifically in terms of components in the single hardware. To incorporate
the advantages of both FDD approaches, a two-layered structure integrating both decentralized and centralized FDD is proposed
and allows us to perform more robust fault detection as well as more detailed fault isolation. Finally, the proposed method
is validated experimentally via field tests of an ATV. 相似文献
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针对VDR模型中慢启动规则存在不尽周严的地方并考虑车辆的相对运动情况,提出了考虑车流实际运行状态的一维元胞自动机模型。数值模拟表明,新模型能更好地描述实际车流的运行状态,并达到更高的路段平均速度和流量,而且避免了VDR模型中的不合理停车,使车辆在路段上分布更加均匀。 相似文献
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