浅析汽车电气电路技术检测维修关键技术

汽车行业在经济以及科学技术高速发展的今天有着良好的发展势头,不过汽车在日常的运行过程中,其内部的电气电路也会存在或者产生一定的问题,从而会影响人们的正常出行,甚至严重可能会引起较为严重的交通事故,因而一定要对汽车电气电路的检测与维修技术予以重视。为此,通过对汽车电气电路的基本构成以及相关资料的分析,整理出汽车电气电路的一些常见故障,从而指出汽车电气电路检测过程中可以使用的关键技术以及维修过程中的技术和注意事项。     

基于CAN总线电传动车辆辅助电气系统设计分析

电传动自卸车辆的辅助电气主要完成车辆仪表、灯光、雨刮、液压逻辑等控制功能以及为整车弱电设备提供电源,主要采用点对点模式,原理简单但存在着整车线束数量多、检修困难、难以维护保养等诸多弊端。针对存在的问题,提出分布集中式的辅助电气模式;对系统布线进行设计,根据各部分功能和布置的不同,采用分布式和传统点对点连接方式相结合的方法,降低整车线束的复杂程度;对辅助电气系统进行设计,设计控制器和端口程序,并对主控制器线路和液压控制器线路进行设计,使其满足整车的使用需求;对辅助电路进行仿真实验,选取机油压力检测和整车紧急双移线试验进行各辅助电路测试。结果可知:机油泵转速、机油温度和机油压力的检测准确度高,误差小于1%;整车实际运行轨迹与理想双移线运行轨迹有较好的吻合;辅助电路能够实现设计的控制机理,顺畅的信号流,CAN总线的网络能够保证正确的通信,准确性和实时性得到实现;为此类设计提供参考。     

汽车电气电路技术检测维修关键技术应用分析

随着社会经济的快速发展,人们物质生活水平的不断提高,汽车也慢慢进入到到了人们的生活中,成为了日常出行、交通运输的重要工具。但随着汽车数量的不断增加,故障问题也越来越多,为了保证汽车运行安全,就需要加强对其的检测维修。基于此,本文对汽车电气电路组成及常见故障进行了分析,并提出了检测维修的关键技术,希望能够对汽车电气电路故障检修提供一些参考。     

汽车电气电路技术检测维修关键技术分析

汽车的使用给人们的生活带来了很多便利,人们的生活水平在日益提升,我国汽车拥有量呈现出急剧增长趋势,这也是导致城市交通压力不断加大的重要原因。如今,人们对汽车使用要求在不断提高,许多先进新型的智能化技术被广泛应用在汽车研发方面,例如无人驾驶汽车技术。汽车的整体配置水平得到了切实的提升,但是汽车在长期使用后常常会出现各种故障问题,很有可能威胁到驾驶和乘坐人员的安全。在这种背景下汽车的检测维修工作变得日趋重要。基于此,这篇文章主要对汽车电气电路技术检测维修关键技术的相关内容进行了分析。     

工程机械电路熔断器的选型与设置

电路在短路或超负载时，其电流会超过额定电流，此称为过电流。过电流会对用电器、线束等产生致命损伤，严重时可引起火灾。对电路的保护，按过电流产生的原因可分为短路保护和过载保护2种。对电路进行保护，正确选择熔断器是关键，本文主要介绍熔断器的选型与设置问题。     

基于燃油经济性评价标准的混动汽车电气零部件检测方法研究

针对混合动力汽车燃油经济性的问题,对电气零部件的节能指标检测方法进行研究,分别提出了针对驱动电机、控制器和动力电池检测台架的设计方案。对国内外相关检测标准进行了总结,简述了适用于各零部件节能指标的检测方法。对混动汽车整车节能技术进行了分析,指出了零部件检测试验中存在一些项目与整车燃油经济性密切相关,同时对驱动电机和动力电池在不同工况中的节能指标进行了探讨。利用零部件检测台架分别对电机和电池进行了相关试验,分析了试验结果对整车燃油经济性方面的影响。研究结果表明,混动汽车电气零部件检测对提高整车燃油经济性具有促进作用。     

汽车电气电路技术检测维修关键技术研究

本文首先简要分析了汽车电路的组成和常见缺陷,然后运用汽车电路的基本维护和检测技术,希望本文的研究有助于延长汽车的使用寿命。     

线束虽小兹事体大

在汽车上，汽车线束。特别多，电子控制系统与线束有着密切关系。汽车线束是汽车电路有着密切关系。汽车线辢 是汽车电路网络主体，连接汽车的电气电子部件并使之发挥功能，没有线束也就不存在汽车电路。随着人们对舒适性、经济性、安全性要求的不断提高，     

汽车线束保险丝匹配流程浅析

本文主要阐述汽车线束保险丝的匹配方法,适用最靠近用电器的1级保险。通过举例详细阐述阻性负载、感性负载等用电器保险丝、电线的匹配流程及结果记录模式。     

电气网络检测在指控系统中的应用

介绍一种基于电气网络检测技术的检测仪.网络检测仪用于测量某指控系统中各电路板之间的网络连接关系。网络检测技术可用于电路板开、短路测试.还可对未知原理图电路和未知系统间的网络连接关系进行提取。     

Scoring tests of aircraft transmission lubricants at high speeds and high tem peratures

Aircraft engines contain gears that have to be lubricated under conditions of high speeds and extremely high temperatures, In this field of application scoring damage can occur. In Europe and partly also in the USA the scoring load capacity of gear oils is expressed in terms of FZG Scoring Load Stage; the FZG Gear Test Rig is described. The normal test procedure A/8.3/90 as standardised in DIN 51 354 using A-type gears at a pitch line velocity of v = 8.3 m/s and a starting oil temperature of 90°C is presented. A modified procedure at double speed and increased oil temperature A/16.6/140 is discussed. The scoring load capacity of aircraft transmission lubricants is expressed worldwide in Ryder Gear Test results. Because of the high costs and problems with the availability of test gears a modified FZG Ryder Test was developed. The method is presented and comparative results of typical aircraft engine oils in the FZG, the FZG-Ryder and the original Ryder Gear Test are shown. From this experience it becomes obvious that alternative test methods for the evaluation of scoring load capacity of aircraft transmission lubricants can be available in the near future.     

Identification of bearing load by three section strain gauge method: Theoretical and experimental research

Reasonable bearing load distribution is important for the safe and reliable operation of rotating machinery. However, it is difficult to measure bearing load in field. This paper puts forward a bearing load identification method based on the measured three section strain values. Shaft is divided into several sections at strain gauge locations. The force and moment equilibrium equations are set up and assembled to form bearing load solving equations. This method can reduce the modeling error, especially for the machines with irregular rotating parts. It can also be applied for the entire shaft system bearing load distribution study with high accuracy and fault tolerant. Test was done on a rotor-bearing system rig. Bearing load distribution in different shaft alignment states is identified and analyzed. Test results show that the bearing load distribution varies sensitively and linearity to the change of bearing elevation. Further research shows that the accuracy of the method depends on the strain gauge locations. It would be best to place the strain gauge at location where the bending moment is sensitive to the change of bearing load. Moreover, mounting the strain gauge further from the bearing reduces the relative error due to the exact reaction point location is not known, which influences the accuracy of beading moment arm from the strain gauge location to the reaction point.     

Experiences with the master axis method for measuring spindle error motions

In this paper, the master axis method of machine tool spindle measurement is described. This method allows spindle measurements to be carried out at speed and under load. For example, a radial load representing the cutting force in a turning operation can be conveniently applied during characterization of a lathe spindle. The synchronous and asynchronous error motions have been observed to vary in both magnitude and shape with changes in load. Test results from both static and dynamic loads during testing are shown to demonstrate the utility of the method.     

某发射转台的结构设计仿真与验证

介绍了某跟踪制导雷达发射转台结构设计的难点,给出了实现发射转台结构仿真和优化设计的手段,用应力应变电测法对发射转台进行了应力测试,用模拟载荷进行了静态变形测量.测试结果表明采用仿真手段可以更高效地提高设计质量,降低产品研制成本和风险.     

高压消解-原子荧光光谱法测定牛初乳中硒的研究

建立了用氢化物原子荧光法测定牛初乳中的硒,考察了前处理方法和原子荧光仪器对实验结果的影响,最后确定了消解试剂6：2：：1的硝酸：过氧化氢：超纯水,用高压消解法处理牛初乳样品,消解温度130—140℃,时间2—3小时;原子荧光的还原剂为14g/l的硼氢化钾,载流液为5％的盐酸。得到硒的检出限0．1ng／ml,相对标准偏差为0．16％-1．61％,回收率范围为88％-102％。     

Buckling limit evaluations for reactor vessel of ABTR

We evaluated the buckling limit of a conceptually designed reactor vessel of the Advanced Burner Test Reactor (ABTR) for a horizontal safe shutdown earthquake (SSE) seismic load. In this evaluation, both seismic isolation and non-isolation designs were considered for thin reactor vessels subjected to elevated temperature services. For calculating the buckling load, two kinds of methods, a numerical simulation method using finite element analysis and an evaluation formula driven from a theoretical basis, were used. To consider the material aging effect caused by a 60-year design lifetime and 510°C normal operating temperature, an isochronous stress-strain curve corresponding to these conditions was used for the nonlinear elastic-plastic buckling analysis method. From the evaluation results of the buckling load, it was found that plasticity behavior significantly affects the buckling strength, but that the initial geometrical imperfections have little effect. Also, the non-seismic isolation design does not satisfy the buckling limit rules of the ASME BPV Section III, Subsection NH, but the seismic isolation design does satisfy it with sufficient margins.     

反推齿轮胶合临界温度可靠性的试验研究

本文提出了用闪温准则反推齿轮胶合临界温度的计算方法，进行了大量齿轮抗胶合承载能力试验，根据试验结果对５０号机械油的临界温度进行了反推计算，分析和对比结果表明，该计算方法是可靠的，试验方案设计是合理的，为确定各类油品润滑时齿轮胶合临界温度奠定了基础。     

J55不加厚油管螺纹滑脱失效计算分析

对某采油厂油井作业中的27／8in不加厚J55型油管失效进行了试验和分析,通过强度计算以及分析可知,油管的饥械性能、化学成分满足要求,失效主要原因是油管悬挂载荷超出设计载荷且螺纹扣在开始旋合时就已经损坏,造成失效破坏。     

Force balanced transducer based on electromagnetic lever with improved linearity

The elastically sensitive element nonlinearity and the signal–noise ratio are the limitation of the traditional force transducer, which makes the precision is rarely higher than 0.02%. This study proposes a force transducer with electromagnetic force balance lever structure. The transducer utilized a controllable electromagnet that generated the controllable electromagnetic force to offset the load while the load value is obtained by the coil voltage, which solves the signal–noise ratio problem. Analyzing the electromagnetic force curves under different temperatures by the piecewise linearization method acquires the high linearity electromagnetic force, which solves the nonlinearity problem. Test results indicated that the transducer linearity was 0.001%, and its precision was 0.003%.     

Comparison of the effects of surface texture on the surfaces of steel and UHMWPE

Surface texture has been well studied for metals and ceramics. For the tribo-pair consisted of soft and stiff materials, in order to find out which side is better for texturing, friction tests between steel and UHMWPE were performed to evaluate the effect of dimple patterns at different load–speed conditions.At a light load of 100 N, surface texture on either steel or UHMWPE can reduce friction, but their optimum area densities are different. However, at a heavy load of 700 N, only the pattern textured on UHMWPE can effectively reduce friction. Test results are further analyzed in terms of contact stress.