气压盘式制动器制动力矩影响因素分析

制动力矩是气压盘式制动器的关键性能指标,直接关系到车辆的制动效果和可靠性。文章结合多年气压盘式制动器技术开发和应用经验,从技术设计角度出发,通过理论计算和有限元分析,对制动力矩的主要影响因素进行归纳分析;同时,兼顾制动块偏磨、杠杆行程等其它性能指标,为制动力矩的提升提供了方向,可为气压盘式制动器的新产品开发和现有产品的技术改进提供借鉴。     

鼓式制动器制动力矩的计算研究

本文建立鼓式制动器力学模型，用三种方法对该制动器制动力矩进行了计算。通过对计算结果和试验结果进行了对比分析，建立了准确而有产的制动力矩计算方法，在此基础上，研究了制动补片材料摩擦系数等参数对制支力矩的影响。     

气压盘式制动器制动噪声产生的原因及改进

不能仅停留在被动更换摩擦片,应该主动从设计入手,包括制动器的结构设计,制动摩擦偶件的选择等,尽量减少制动噪声,在保障制动安全的基础上,缓解城市噪声污染。     

EQ1061轻型汽车制动器制动力矩指标的确定

介绍了ＥＱ１０１６轻型汽车车轮制动器制动力矩设计设计指标的确定，并对汽车车轮制动器制动力矩设计指标的确定方法进行了讨论与完善。     

解决气压鼓式制动器制动跑偏的方法

制动器是汽车系统中的一个安全部件,气压鼓式制动器有时出现制动轨迹偏离直线行驶方向的现象。鼓式制动器跑偏是一种常见现象,为解决制动跑偏问题,对制动过程中跑偏的故障现象进行了收集整理,研究分析原因,对制动器从设计到制造工艺提出了改进措施。经过批量生产和用户使用证明解决措施取得了很好的效果。     

某轿车盘式制动器设计

基于某轿车制动系统整车匹配进行优化设计,旨在满足相关法规下,简化制动器设计过程。通过将整车性能参数与盘式制动器设计有机结合,制定盘式制动器设计策略。通过计算在制动过程中汽车制动系统各个车轮的最大制动力矩和选定该轿车同步附着系数,确定了盘式制动器的主要部件关键设计参数和材料,并经计算验证了制动器各项性能均符合相关法规要求。最后,应用计算机辅助设计（CAD）软件和UG软件完成主要零件图的绘制和三维建模。从而在满足相关法规要求下,优化了汽车制动器设计流程,同时为后续制动噪声等问题研究奠定基础。     

盘式制动器制动尖叫的研究

制动尖叫是由摩擦耦合诱发和顺各部件的模态参数匹配不当引起的系统不稳定现象，针对一个有尖叫倾向的实际样车，通过有限元方法提取制动器各部件的模态参数，以制动器的每个部件作为一个子结构，应用自由界面法进行模态综合，得到了与实际尖叫情形相符的耦合模型；应用耦合模型，通过分析子结构模态与耦合系统不稳定模态的关系，这量地得到了各子结构模态对制尖叫的影响大小，从而得到了决定尖叫产生与不否的关键因素－支架的第１１     

客车电磁缓速制动器的制动力矩与温升研究

在介绍电磁缓速制动器工作原理的基础上,通过电磁理论推导,得到了电磁缓速制动器制动功率和制动力矩的计算公式,并研究了温度升高对电磁缓速制动器主要参数电导率和相对磁导率的影响。     

汽车电磁缓速制动器制动力矩的分析与计算

介绍汽车电磁缓速器的结构与工作原理,推导其制动力矩的计算公式。该公式反应了各变量之间的关系,可用于电磁缓速器结构设计和性能分析的参考。     

气压盘式制动器的性能优势及应用

本文分析了气压盘式制动器的技术优势和性能，指出了气压盘式制动器具有科技含量高、结构科学、性能稳定可靠的特点，在客车特别是城市公交客车市场有广阔应用前景。     

商用车气压ABS线束的匹配设计

在进行汽车电线束设计时,设计原则应是以最短的电线、最少的电线根数、最合适的电线截面并选择合适的连接器及端子加以正确可靠的连接,从而提高工作的可靠性.     

Investigation of influential factors of a brake corner system to reduce brake torque variation

This paper investigates the brake corner system to reduce brake torque variation in the brake judder problem. A numerical model for determining brake torque variation was constructed using the multi-body dynamics model. Using this model, the brake torque variation for a given disc thickness variation was obtained in the time domain. The multi-body dynamics model was verified by a dynamometer test via the comparison of brake torque variation and load distribution patterns of the pad. To reduce the simulation time and cost required to determine factors that influence the reduction in brake torque variation, a simple mathematical model was constructed and used to determine both the brake torque variation and influential factors. The multi-body dynamics model and dynamometer test were modified on the basis of the results of the simple mathematical model and deformed shape of the multi-body dynamics model. These influential factors were verified to reduce the brake torque variation.     

Development of the brake system design program for a vehicle

It is quite challenging to estimate the braking performance of a vehicle because the brake system is comprised of many parts, including a booster, master cylinder, and caliper. Calculation of characteristics such as braking force through vehicle tests requires much time and money. Therefore, the development of a method to estimate the braking performance of a vehicle using qualitative methods is beneficial. In this study, a program that can analyze the braking capabilities of a vehicle such as pressure, efficiency, and pedal travel is presented. The increase in disc temperature during braking as well as the properties of various boosters can be calculated using the proposed program. Dynamic characteristics of a vehicle equipped with a Load Sensing Proportional Valve (LSPV) were computed more precisely by obtaining the change in valve pressure according to the displacement of a suspension system. Since all input and output files are composed in the Microsoft Excel format, both design data management and database construction can easily completed.     

气室支架失效整改的有效方法

针对顾客抱怨气室支架失效问题。首先对返回的气室支架失效件进行了归类分析,其次运用统计技术科学地将气室支架失效按故障阶段等分析,为明确气室支架失效整改提供了正确决策的依据。最终达到提高了产品的可靠性,进一步保证了产品质量,提高了顾客满意。     

基于遗传算法的盘式制动器多目标优化模型

介绍了盘式制动器混合多目标优化问题数学模型的建立，提出以制动摩擦力矩和制动时间为主要优化目标的多目标函数，为求得全局最优解，引进了遗传算法进行优化，结果表明，方法简便可行。     

Approach to functional safety-compliant ECU design for electro-mechanical brake systems

In this paper, we propose a design approach to a functional safety-compliant ECU for an electro-mechanical brake (EMB) control system or an electronic wedge brake (EWB) control system. Brake actuators in a brake-by-wire (BBW) system such as EMB or EWB are characterized by the safety-critical functions which are now executed by using many electric and electronic devices with application software. Based on hazard analysis and risk assessments of the automotive functional safety standard ISO 26262, the proposed EMB control system should be ASIL-D-compliant, which is the highest ASIL level. To this end, a hardware and a software design method is introduced to implement functionl safety-oriented monitoring functions which are based on an asymmetric dual-core architecture with an external watchdog processor. It is shown by using EMB hardware-In-the-Loop-Simulation (HILS) that the proposed ECU design approach is very effective when a hardware fault or software execution faults occur in the EMB ECU, moreover, this functional safety-compliant design can be well combiled with the sensor fault-tolerant control logic.     

Vibration path analysis and optimal design of the suspension for brake judder reduction

Brake judder is abnormal vibration, which is mainly generated by uneven contact between the brake disc and pad. The abnormal vibration from BTV (Brake Torque Variation) is transferred to the suspension and the steering system during braking. In this paper, judder simulation is carried out using a multi-body dynamic analysis program to analyze the relationship between judder and the transfer mechanism, which consists of the suspension and the steering system. In order to verify the analytical model, test results are compared with the simulation results. A sensitivity analysis is also carried out. In addition, an optimization method is presented for judder reduction, using the design of experiments.     

Structural optimization of a circumferential friction disk brake with consideration of thermoelastic instability

This research suggests a new disk brake design using circumferential friction on the disk of a front-wheel-drive passenger car. The paper compares mechanical performance between the conventional and suggested disk brakes under dynamic braking conditions. Thermoelastic instability is considered in simulation of the test condition. An optimization technique using a metamodel is introduced to minimize the weight of the suggested disk brake. To achieve this goal, the response defined in the optimization formulation is expressed in a mathematically explicit form with respect to the design variables by using a kriging surrogate model, resulting in a simple optimization problem. Then, the simulated annealing algorithm is utilized to find the global optimum. The design results obtained by the kriging method are compared with those obtained from ANSYS analysis.     

某车型前后桥制动器匹配设计

为满足整车制动性能要求,对主机厂提供的参数进行制动力匹配计算,并将计算结果与试验结果进行对比,其制动性能试验结果符合法规GB 12676—1999的相关要求。