制动器鸣响如何检查

一谈到盘式制动器的故障时，大多数人都认为制动器鸣响是最常见的故障，如果制动器出现了鸣响，每当踏动制动踏板时，制动器都会发出刺耳的摩擦声，既令人不安又令人讨厌。     

盘式制动器接触界面压力分布研究

采用边界元法对盘式制动器摩擦衬片与制动盘接触界面问题，动态压力分布进行了分析，运用柔度矩阵技术提高了计算的效率，考虑到摩擦接触过程的不可逆性，给出了增量加载过程求的一般格式。最后，地结果进行了讨论，提出了一些对制动器设计和热分析有价值的结果。     

摩托车盘式制动器技术要求与台架试验

摩托车盘式制动器存在着基本性能要求，对国产摩托车盘式制动器与进口同类产品在制动性能、热衰退性、热恢复性、磨合性等性能上进行了台架对比试验，从而验证了摩托车盘式制动器国产化的技术水平。     

制动器鸣响如何检查

一谈到盘式制动器的故障，大多数人都认为制动器鸣响是最常见的故障。制动器出现的鸣响是指每当踏动制动踏板时，制动器发出刺耳的摩擦声。     

都灵—V汽车后轮驻车制动器的特点与维修（与后轮盘式制动器配用）

众所周知，驻车制动是汽车必备的制动装置之一。依维柯二代产品的驻车制动装置，是由驻车制动机械操纵机构与后鼓式制动器组合而成。这样的结构，使后鼓式制动器不仅是行车制动器，而且还起到了驻车制动作用。随着后轮盘式制动器的运用，都灵-V汽车的驻车制动器将会随着后轮制动器动型式而变化。若后轮采用鼓式制动器，则基本维持原二代产品的结构；     

装用ABS车辆的制动器热力学分析

车辆上装用ＡＢＳ后，力图通过控制调节车轮的运动状态，以获取最佳制动效果。制动器的热衰退性能是其制动效能恒定性的重要决定因素。为提高制动效能因素，鼓式制动器上都采用自动增力蹄，但其制动效能的热恒定性确大为下降。本文以鼓式制动器为例，介绍车辆上装用ＡＢＳ后的制动器热力学计算方法，为车辆上装用ＡＢＳ后制动器的设计提供基础，也可由此对制动器使用寿命的影响进行分析。     

汽车制动效能的热衰退

文章分析了汽车制动效能热衰退产生的原因；探讨了提高汽车热衰退能力的措施；通过对不同结构形式制动器抗热衰退能力的比较，提出了制动器的应用趋势。     

被动风冷式鼓式制动器制动特性的台架试验研究

介绍了新型被动风冷式鼓式制动器的结构和降温原理.为检验该制动器的制动效能,在制动器惯性试验台上对该被动风冷式鼓式制动器和普通鼓式制动器对比进行了基准点检验试验、效能点检验试验、热衰退试验及热恢复试验.试验结果表明,被动风冷式鼓式制动器的基准点、效能点检验试验结果与普通鼓式制动器差别不大,但其具有良好的热恢复性能和抗热衰退特性.     

鼓式制动器摩擦片直径及垂直度自动检测系统

介绍了鼓式制动器摩擦片的直径及垂直自动检测系统。该系统除上下料以外，全部实现了自动化。完成一只制动器全部检测只需４０ｓ左右时间，重复精度达到０．０２ｍｍ，满足检测工艺的要求。重点分析了检测原理和微机系统的软，硬件设计。     

盘式制动器热-应力-磨损耦合行为的数值模拟

本文中探讨了盘式制动器制动过程中摩擦片和制动盘之间的热负荷-接触应力-磨损耦合行为的数值模拟方法。首先建立了盘式制动器的有限元模型;然后研究了应力-磨损耦合分析的数值计算方法,并且模拟了摩擦片和制动盘的磨合过程;最后分别对热-应力耦合条件下和紧急制动工况下的摩擦片磨损行为进行了模拟。结果表明,所提出的模拟方法是有效的。     

Brake pad taper wear on brake moan noise

Automotive brake systems today have many factors that can contribute to brake noise. Modern approaches to reduce the propensity of brake noise mostly target high frequency brake squeal. A more difficult constituent of brake noise to address is low frequency moan, which is typically caused when the brake system excites a suspension member with a constrained natural frequency in the range of excitation. Although most modern CAE techniques utilized to diagnose and solve brake noise issues focus on new brake pad condition, this paper will show the benefit of understanding a common wear mechanism “Taper Wear,?and attempt to correlate its effects on brake moan. In order to study this phenomenon, a finite element model of a disc brake is established, and a complex eigenvalue analysis (CEA) of the brake system is performed. The propensity of brake moan noise is evaluated on basis of damping ratio of a dynamic brake system model. By using the finite element model, effects of the brake pad taper wear on brake moan noise is studied. The results show that the brake pad taper wear is a significant factor for generating the instability causing the brake moan noise. The study is performed at various levels of brake pad taper wear. When the brake pad taper wear is more than 0.5 mm, the value of negative damping ratio rapidly increases, and the propensity of brake moan noise is greatly magnified. In this study, the simulation result correlated well with the test result, which provides the theory and guidance for brake moan noise control.     

气制动大客车制动力矩计算分析

介绍气制动大客车制动力以及制动力矩的计算方式,并通过实际气制动客车制动力矩的计算和数据对比.为今后在客车制动系统设计当中,提供有效理论依据.     

辅助制动操作对制动蹄片温度的影响

排气制动和发动机制动是重型载货车使用最广泛的辅助制动,但需要驾驶员熟练掌握辅助制动的方法,本文首先总结了辅助制动的操作方法;然后在高速公路和山区公路上,对某重型载货车采用制动淋水、辅助制动以及辅助制动和制动淋水相结合的三种方式,试验辅助制动对制动蹄温度的影响。     

客车制动力调节分析与优化建模设计

根据对汽车制动过程的受力分析,建立理想制动力I曲线,初步确定前后轴制动力分配比,据ECE制动法规优化建模后,最终确定最佳制动力分配比,进而选定制动阀。     

城市客车制动管路结冰问题的研究

城市客车冬季制动管路经常结冰会导致制动失效,行车有安全隐患,为了解决这个问题,对城市客车制动管路结冰问题进行专项研究。对城市客车的行驶特点、制动系统零部件结构功能和管路安装形式进行了详细介绍,总结出城市客车制动管路结冰的4方面原因。通过理论计算与分析,提出防止制动管路结冰的4项措施,解决了城市客车冬季制动管路结冰这个问题。     

发动机制动、排气制动与缓速器联合作用时的非连续线性控制系统的研究

针对客车发动机制动、排气制动的制动扭矩比较小的问题,提出采用发动机制动、排气制动与缓速器联合作用的持续制动方式,并且针对汽车在山区道路下坡行驶过程中对稳定车速的要求,进行了相应的控制系统设计。模拟分析结果表明:该控制系统可以保证汽车在不采用行车制动器的条件下,利用发动机制动、排气制动与缓速器联合作用的持续制动方式,在各种坡度的坡道上以希望的车速稳定下坡行驶,为汽车在山区道路连续下坡行驶的制动安全性提供了一个合理的解决方案。     

Model-based analysis of the mechanical subsystem of an air brake system

Most commercial vehicles such as buses and trucks use an air brake system, often equipped with an S-cam drum brake, to reduce their speed and/or to stop. With a drum brake system, the clearance between the brake shoe/pad and the brake drum may increase because of various reasons such as wearing of the brake shoe and/or brake drum and drum expansion caused by high heat generation during the braking process. Hence, to ensure proper functioning of the brake system, it is essential that the clearance between the brake shoe and the brake drum is monitored. In this paper, we present a mathematical model for the mechanical subsystem of the air brake system that can be used to monitor this clearance. This mathematical model correlates the push rod stroke transients and the brake chamber pressure transients. A kinematic analysis and a dynamic analysis of the mechanical subsystem of the air brake system were performed, and the results are corroborated with experimental data.     

一种新型增力式车轮制动器

研制了一种利用滚柱并通过楔形结构实现制动增力的新型增力式车轮制动器,该结构可使制动蹄受力合理、磨损均匀,为中、重型汽车采用液压制动提供了有效的途径。介绍了该制动器的结构、工作原理,确立了增力条件,导出了一些关键参数的确定方法。初步试验表明,该增力式车轮制动器增力效果显著,制动力大小仍然可以通过制动踏板进行控制,最大制动力能够达到试验车气压制动的水平。简要分析了存在的问题及解决方法。     

日野ZY240H载货自卸车制动系统

日野ＺＹ２４０Ｈ２０吨自卸车的制动系统采用双回路独立全气压式工作系统，前轮和后轮制动各用一个独立执行气压制动回路，前桥和后桥后轮采用膜片制动气室，后桥前轮设置了弹簧储能复合制动气室，又设置了一套手动控制的制动系统，作为紧急制动系统失效后的第二种制动方法。另外，还有排气缓速装置和机械手制动，详细介绍了该系统的工作原理和主要部件的功用。     

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.