浅谈丰田雷克萨斯LEXUS ES300型轿车的ABS失效故障排除

本文主要针对一台丰田雷克萨斯LEXUS ES300型轿车的ABS系统,根据客户反映,ABS系统开始工作正常,但在行驶的过程中紧急制动后,ABS警告灯突然会亮,ABS系统明显不起作用,制动踏板感觉有不寻常的抖动,而且发硬,制动效果减弱。根据故障现象,结合该车ABS系统的结构和原理,对这一故障进行了比较深入的分析和讨论,并加以排除。     

汽车离合器打滑故障诊断与维修

汽车制动防抱死系统ABS,是汽车制动过程中,防止车轮抱死,提高汽车方向稳定性和转向操纵能力,缩短制动距离的一种安全装置。ABS系统在频繁使用中会产生许多故障,本文以本田雅阁ACCORD2.2EX轿车为例,着重分析了ABS系统故障的检测和排除过程。     

关于ABS防爆死系统的几点思考

ABS,即防爆死制动系统,在汽车进行紧急制动和在易打滑的路面上进行常规制动时,对确保汽车方向的稳定性、制动可靠性和行驶安全性具有重要作用。讲述汽车ABS系统的基本组成及工作过程,ABS系统出现故障时,正确的方法检修故障,使驾驶员能正确的认识和使用汽车ABS系统。     

气压制动式ABS的故障诊断与检修

简述气压制动式ABS特点及组成,介绍了气压制动式ABS各零件的布置,详细阐述了气压制动式ABS系统故障诊断及各部件故障检修。     

汽车防抱死制动系统浅析

汽车防抱死制动系统(antilock braking system,ABS)是在汽车制动的过程中,通过控制车辆的滑移率在适当的范围内,防止车轮制动时抱死滑移而造成重大安全事故。本文从汽车制动防抱死系统的工作过程出发,论述了汽车防抱死系统的组成结构、制动过程和工作原理,并且论述了ABS系统的使用和维护,梳理了防抱死系统的常规检查,进而分析故障的诊断与排除。     

金龙客车ABS故障诊断

客车作为载客量大的交通工具其安全问题非常重要,在车辆的使用过程,如果ABS系统出现故障就会影响到车辆的制动效果,应该及时进行检修排除,本文以金龙KLQ6109客车为例说明金龙客车ABS系统故障码的读取方法及故障码的含义,并说明故障的诊断方法,对于其他类型的金龙客车ABS系统的故障诊断具有借鉴之处。     

防抱死制动系的使用与检修

制动系统是汽车的一个重要组成部分,他直接影响汽车的安全性。据有关资料介绍,在由于汽车本身造成的交通事故中,制动故障引起的事故占事故总量的45%。可见,制动系统是保证行车安全的极为重要的一个系统。ABS(防抱死制动系统)作为一种主动安全装置,在现代汽车上广泛运用。     

凯越1.8L ABS灯故障维修

故障现象:车主反映该车ABS灯有时会亮。维修过程:1.工单上注明该车多次检查ABS灯亮故障,经查维修记录获悉该车此前因此故障已更换过ABS总泵。2.此次检修时该车ABS灯并未启亮,用TECH2检测发现存有2个历史故障码:B0665 ABS警告灯故障和C0232制动警告灯故障。3.查阅维修资料:     

ABS工作原理简介

ABS(车轮防抱死系统)依靠装在各车轮上的高灵敏度轮速传感器实现计算机控制的自动调节制动压力的刹系统。在制动过程中,当车轮接近抱死时,电控单元按照"降压"、"保压"、"升压"这三个模式对各分泵进行控制,直至车辆停止。     

奥迪A6轿车电子防抱死制动系统的自诊断及故障排除方法

本文通过对奥迪A6汽车ABS制动防抱死系统的组成、功用、自诊断原则等进行了简单的叙述,最后通过六个典型的故障现象进行原因分析并给出了故障的诊断步骤。通过本文的浏览,可以初步的了解当代轿车上采用的ABS技术的控制原理、正常的保养和使用方法。     

Nonlinear control of an antilock braking system in the presence of tire–road friction uncertainties

An Antilock Braking System (ABS) is characterized by nonlinear dynamics, which render more difficult the design of a controller for high performance. The problem is even harder due to the uncertainties on the parameters appearing in its dynamics. In this paper, an ABS laboratory setup is considered, which mimics a quarter car model. A super–twisting controller is proposed to overcome the problem due to parameter uncertainties. This controller is designed in order to impose a reference value of the tire slip. Two cases are considered: in the first, nominal ABS parameters are used in the controller, whereas in the second the controller embeds an estimator of the tire–road friction coefficient, which is one of most critical parameters. The friction coefficient is estimated in finite–time by means of a high–order sliding mode differentiator. The original contributions of the paper are the real–time implementation of the super–twisting controller for the laboratory setup under study, and the use of a super–twisting estimator to provide a finite–time estimation of the friction coefficient between the tire and the road, along with a comparison with classical PI–like and super–twisting controllers, available in the literature. The ABS laboratory setup allows checking experimentally the performance of the proposed nonlinear dynamic controller, showing a considerable increase of the efficiency of the control system.     

轿车温度传感器分析

近年来,随着轿车智能化程度愈来愈高,轿车上的电气设备也愈来愈多。轿车上的传感器少至几十个,多至一百多个,豪车上甚至装有几百个传感器。单单一辆车上的温度传感器可能就有四至十个之多。文章从类型、位置与用途、故障分析以及故障检测案例四方面对轿车上常见的温度传感器进行分析。     

分离路面上的汽车制动性能仿真研究

利用虚拟样机软件ADAMS/CAR,建立了整车模型和分离路面模型,并在Matlab/Simulink环境下建立了ABS的控制模型。在此基础上对带有ABS的车辆进行了联合仿真,分析其在分离路面上的制动性能,最后与不带ABS车辆的制动性能进行了对比。联合仿真结果表明:带ABS的车辆在制动效果、行驶方向稳定性上具有明显优势,同时也说明了ABS联合仿真具有较高的可行性与有效性,可为ABS的研究提供一定依据。     

制动力大小警示系统的研究与开发

介绍了一种以单片机为控制核心的制动力大小警示系统的研究与开发:采用制动油压传感器,以LED数码显示器在车内向驾驶员告知制动油压具体值,检测制动系统是否正常工作;以LED红色警示灯在后窗,向后面行车驾驶员提供制动力参考,使其控制合适车距,避免追尾。     

宝来汽车发动机怠速抖动故障的检修

宝来汽车的发动机电控系统,因为凸轮轴调节机构故障导致发动机工作不良,最后更换凸轮轴调节机构修复。     

基于光电信号的主动式路径传感器设计

本文介绍一种基于光电信号的主动式路径传感器设计。简要概述了路径检测在全国大学生智能汽车竞赛中的重要性,阐述了智能车比赛赛道的路径识别原理,路径传感器的发光电路设计,接收电路设计以及传感器的安装和信号的处理。通过和普通的反射式光电传感器对比,表明该路径检测方式优于传统的光电路径检测方式。     

汽车典型安全气囊碰撞传感器分析

人们对汽车的安全性能要求越来越高,同时,汽车安全技术也得到了快速发展。文章主要介绍汽车安全技术的重要组成部分--安全气囊碰撞传感器。文章先概述碰撞传感器的作用类型,接着重点介绍滚球式与电阻式两种典型碰撞传感器,然后讲述连接电路,最后简述国内发展现况。     

点火系统引起发动机抖动故障诊断实例

本文着重论述了电控系统故障诊断基本流程、正确的诊断步骤等内容,实例介绍一汽丰田卡罗拉1.6L GL AT轿车发动机怠速抖动、发动机动力不足且发动机故障灯点亮的故障诊断流程,为正确快速地解决发动机电控系统故障提供了良好的思路,使初学者更容易理解发动机电控系统的故障特点及解决方法,减少他们在实践中的误判。     

ABS测试设备设计

简要介绍了ABS的组成及其工作原理,并结合自身情况,设计了测试ABS信号的设备,并投入使用。     

Biopiracy: Crying wolf or a lever for equity and conservation?

Access and benefit sharing (ABS) is a central approach to address biopiracy – the misappropriation of genetic resources and traditional knowledge without consent or compensation, often tied to patenting. Benefit-sharing agreements comprise a core element of ABS and are intended to leverage greater social and economic justice, create incentives for biodiversity conservation, and strengthen the rights of indigenous and local communities. However, emerging evidence suggests otherwise. Through review of four cases of biodiversity commercialization in South Africa – Hoodia gordonii, Aspalathus linearis (rooibos), Sceletium tortuosum (kougoed) and Pelargonium sidoides, each with histories of biopiracy charges and associated benefit-sharing agreements, this paper aims to explain this apparent contradiction. The cases reveal that while ABS has succeeded in recognizing holders of traditional knowledge, the wider political and economic struggles faced by communities remain neglected. Power relations and economic disparities have not changed, and control remains vested in land, with ownership remaining highly skewed towards industry partners who have market dominance; and intellectual property, the benefits of which are disassociated from traditional knowledge holders and biodiversity custodians. ABS processes have also led to a clamor for representation, favoring groups that are politically connected, well organized and resourced, while excluding more marginalized groups who are less capacitated. Moreover, despite significant biodiversity concerns in each case, there are few conservation benefits. Such trends, combined with new forms of “digital biopiracy” and opportunities opening through the post 2020 Global Biodiversity Framework, emphasize the need to reconceptualize ABS to leverage more equitable and sustainable outcomes.