轿车防抱死制动系统的维护

轿车防抱死制动系统的故障主要分为制动器故障、制动压力调节器故障、车轮速度传感器故障及ABS/ASR电脑故障.     

诊断ABS故障的技巧和方法

随着国内外新型汽车特别是高级轿车在我国保有量的快速增加,汽车电子化程度呈现出越来越高的趋势.例如:ABS是在制动时可防止车轮完全抱死且制动效果优于普通制动系统的制动装置.它主要由电子控制器即ABS微机、车轮速度传感器和执行器(即压力调节器)3部分组成.工作时,车轮速度传感器对车轮速度进行监测,并将信号传递给ABS微机,ABS微机接收车轮速度传感器传来的信号,经测量比较、放大分析、判别处理后,向压力调节器发出指令,调节器收到指令后对制动力进行调节,使制动性能处于最佳状态.很遗憾,许多驾驶员和维修工至今还不甚了解或很不了解ABS制动系统的特性和故障的诊断方法,以致仍采用传统的操作和维护方法,遇到故障不知从何入手,使问题复杂化.现根据笔者了解的情况和维修经验,介绍几种诊断ABS故障的技巧和方法,供驾修人员参考.     

诊断ABS系统故障的技巧和方法

随着新型汽车特别是高级轿车在我国保有量的快速增加，汽车电子化程度呈现出越来越高的趋势，ABS系统是在制动时可防止车轮完全抱死且制动效果优于普通制动系统的刹车装置。它主要由电子控制器即ABS电脑、车轮速度传感器和执行器（即压力调节器）三部分组成。工作时，车轮速度传感器对车轮速度进行监测，并将信号传递给ABS电脑，ABS电脑接收车轮速度传感器传来的信号，经测量比较，放大分析，判别处理后，向压力调节器发出指令，调节器收到指令后对制动力进行调节，使制动性能处于最佳状态。     

骐达轿车ABS系统检修方法

一、骐达轿车ABS的结构特点东风日产骐达轿车的ABS防抱死制动系统由车轮速度传感器、执行器（制动压力调节器）、ABS电控单元等组成。在4个车轮处各安置一个车轮速度传感器和齿圈，将各车轮旋转速度的信号传递给电控单元ECCS。     

电子控制防抱制动系统的组成与分类

一、电子控制防抱制动系统的组成 目前．虽然世界上生产电子控制防抱制动装备的厂家较多。其产品的型式与结构不尽相同，但一般来说它都主要由车轮速度传感器，电子控制器(ECU)、制动压力调节器和ABS警告灯等组成。     

诊断ABS系统故障的技巧和方法

随着国内外新型汽车特别是高级轿车在我国保有量的快速增加,汽车电子化程度呈现出越来越高的趋势.例如:ABS系统是在制动时可防止车轮完全抱死且制动效果优于普通制动系统的刹车装置.它主要有电子控制器即ABS电脑、车轮速度传感器和执行器(即压力调节器)三部分组成.     

汽车ABS的正确使用和检修

现代汽车的ABS系统一般包括3个部分:传感器、控制器(电子计算机)及制动压力调节器。其基本原理是在车轮上装设传感器,直接测定车轮的状况,然后向电脑发出脉冲信号。当车轮抱死时,立即     

高性能的ABS

在典型的ABS系统中,每个轮毂上装有与车轮速度成比例的磁阻传感器。经过过滤,消除干扰,这个速度信号转换成适合微控制器(MCU)的5V数字信号。MCU是电子控制元件(ECU)的一部分,ECU从所有车轮传感器收集到信息,计算出是否每个车轮在加速或减速,并连续测定液压制动调节器是否需要激励加速、减速或维持一个恒定的制动压力。ECU必须也能保证来自每一调节器的制动压力是均匀的,并能避免出现造成车辆旋转的不平衡的锁住情况。     

汽车防抱死制动系统的结构和故障检测

汽车防抱死制动系统（ＡＢＳ）利用轮速传感器来检测车轮的速度，大大提高了汽车的安全和操纵性，在阐述ＡＢＳ的轮速传感器，压力调节器和电子控制装置的结构和工作大批量的基础上，详细介绍了上述部件的检测及其故障排除的方法。     

电控制原理图排除ABS故障一则

一辆雪佛兰轿车行驶途中。仪表盘中的ABS防抱警告灯闪亮。该车的防抱死系统装置为车轮减速控制式。其工作原理如附图所示：当驾驶员制动时踩下制动踏板，制动总泵将制动液加压。通过调节器分配给各车轮制动分泵，推动制动蹄压紧制动鼓(盘）。完成对汽车的制动。装在前轮及变速器输出轴上的速度传感器，将各车轮的转速信号输给ECU，ECU将这些信号同车速信号一起与储存的最佳制动参数比较．立即向调节器中的电磁阀发出指令。以控制滑移率。     

丰田LAND CRUISER吉普车ABS系统分析

简要介绍ＡＢＳ系统的作用，结合丰田ＬＡＮＤ ＣＲＵＩＳＥＲ吉普车装用的ＡＢＳ系统，详细分析了车轮转速传感器，负加速度传感器，ＡＢＳ ＣＥＵ和油压调节器的结构和工作原理，同时给出了该系统自动故障检测的代码，以及代码的意义。     

Dynamic analysis and control of an anti-lock brake system for a motorcycle with a camber angle

This paper analyses the dynamic response of a motorcycle with an anti-lock brake system (ABS) and camber or steering angle. Most studies have assumed that motorcycles brake in a straight line – that is, without a steering or camber angle. In this work, the performance of an ABS modulator is designed and analysed at first. Then, a controller is designed for motorcycle turning. The controller uses angular acceleration and the pressure value in brake calipers on the front and rear wheels, camber angle and lateral acceleration as commands to control brake pressure on each wheel to prevent wheel locking. The equation of motion for a motorcycle is based on Weir's equations. This motorcycle model combines a mathematical equation of the ABS modulator, tyre model and controller in simulations.     

Experimental investigations on continuous regenerative anti-lock braking system of full electric vehicle

Functions of anti-lock braking for full electric vehicles (EV) with individually controlled wheel drive can be realized through conventional brake system actuating friction brakes and regenerative brake system actuating electric motors. To analyze advantages and limitations of both variants of anti-lock braking systems (ABS), the presented study introduces results of experimental investigations obtained from proving ground tests of all-wheel drive EV. The brake performance is assessed for three different configurations: hydraulic ABS; regenerative ABS only on the front axle; blended hydraulic and regenerative ABS on the front axle and hydraulic ABS on the rear axle. The hydraulic ABS is based on a rule-based controller, and the continuous regenerative ABS uses the gain-scheduled proportional-integral direct slip control with feedforward and feedback control parts. The results of tests on low-friction road surface demonstrated that all the ABS configurations guarantee considerable reduction of the brake distance compared to the vehicle without ABS. In addition, braking manoeuvres with the regenerative ABS are characterized by accurate tracking of the reference wheel slip that results in less oscillatory time profile of the vehicle deceleration and, as consequence, in better driving comfort. The results of the presented experimental investigations can be used in the process of selection of ABS architecture for upcoming generations of full electric vehicles with individual wheel drive.     

Modeling and Analysis of Automotive Antilock Brake Systems Subject to Vehicle Payload Shifting

The steerability and stability of vehicles must be maintained during emergency stopping and evasive driving maneuvers on degraded road surfaces. The introduction of antilock brake and traction control systems (ABS/TCS) has expanded the envelope of safe vehicle operation for the majority of drivers. These mechatronic systems combine an electronic controller with wheel speed sensors, an electro-mechanical hydraulic brake actuator, and in some instances, engine intervention through the engine control unit, to regulate wheel slip. The development of ABS systems has traditionally depended on extensive in-vehicle testing, at cold weather proving grounds, which contribute to lengthy product development cycles. However, recent attention has been focused on the use of simulation and hardware-in-the-loop strategies to emulate test conditions in a controlled setting to shorten product design time and methodically address critical safety issues. In this paper, the effect of transient load shifting due to cargo movement on ABS performance in light-duty vehicles will be investigated. Analytical and empirical mathematical models are presented to describe the chassis, tire/road interface, wheel, brake modulator, and cargo dynamics. Two strategies, a model-free table lookup and model-based discrete nonlinear controller, are presented to regulate the ABS modulator's operation. These vehicle and controller dynamics have been integrated into a simulation tool to investigate the effect of transient weight transfers on the vehicle's overall stopping distance and time. Representative numerical results are presented and discussed to quantify the ABS systems' performance for various loading and operating conditions.     

汽车轮速传感器仿真方法

轮速传感器测量汽车轮速信号,用于制动、发动机及变速箱等众多系统控制,是汽车最关键的部件之一。新车型开发阶段,为了对汽车制动防抱死系统(ABS)及早有效的开发验证,需要对轮速传感器进行仿真模拟。文章针对最常用的主动式轮速传感器进行测试与分析,通过设计信号调理电路,成功搭建了ABS硬件在环仿真平台,既简化了汽车开发阶段的验证与测试,又节省了开发成本。     

Cooperative control of the motor and the electric booster brake to improve the stability of an in-wheel electric vehicle

A cooperative control algorithm for an in-wheel motor and an electric booster brake is proposed to improve the stability of an in-wheel electric vehicle. The in-wheel system was modeled by dividing it into motor and mechanical parts, and the electric booster brake was modeled through tests. In addition, the response characteristics of the in-wheel system and the electric booster brake were compared through a frequency response analysis. In the cooperative control, the road friction coefficient was estimated using the wheel speed, motor torque, and braking torque of each wheel, and the torque limit of the wheel to the road was determined using the estimated road friction coefficient. Based on the estimated road friction coefficient and torque limit, a cooperative algorithm to control the motor and the electric booster brake was proposed to improve the stability of the in-wheel electric vehicle. The performance of the proposed cooperative control algorithm was evaluated through a hardware-in-the-loop simulation (HILS). Furthermore, to verify the performance of the proposed cooperative control algorithm, a test environment was constructed for the anti-lock braking system (ABS) hydraulic module hardware, and the performance of the cooperative control algorithm was compared with that of the ABS by means of a HILS test.     

基于Matlab的ABS不同控制方式的仿真

汽车防抱制动系统（ABS）能实时控制车辆产生最佳的制动力矩,避免产生过大的车轮滑移,从而保持汽车的操纵性和稳定性。文中分别采用PID控制、逻辑开关控制两种方法对单轮汽车模型进行了模拟仿真。然后与没有ABS的情况进行对比,通过对仿真图形曲线的分析,得出ABS的防抱死效果明显。     

MK20型圆ABS的排气加液

MK20型ABS中，由于液压回路中增加了用来调节车轮制动器压力的电磁阀，使得系统的排气加液跟传统的制动系统有所不同。介绍了ABS的真空排气加液过程和ABS常闭阀控制过程，并对真空加液的操作时间节拍进行估算。试验结果表明，其排气加液效果较好。     

基于模糊PID的汽车防抱制动系统控制策略的研究

在基于滑移率的ABS控制策略的基础上,建立了11自由度的汽车急转制动仿真模型。提出了一种参数自整定模糊PID控制算法,并采用了Bang-Bang控制和模糊PID控制分别对汽车ABS进行了仿真,其结果表明:模糊PID控制比Bang-Bang控制可以达到更好的效果。