湿式多盘制动器制动噪声机理研究

为了减弱和消除湿式多盘制动器的制动噪声，针对湿式多盘制动器的工作特性，建立了湿式多盘制动器制动时的数学模型，并应用模态分析方法推导出影响制动噪声产生的理论公式，研究了湿式多盘制动器制动噪声的产生机理，分析了湿式多盘制动器产生制动噪声的主要因素，提出了防治湿式多盘制动器制动噪声的具体措施。     

国外重型挂车车桥--装有盘式制动器的挂车车桥及结构特点

一、盘式制动器 长期以来独霸汽车制动器领域的鼓式制动器，自从1996年戴一克装有Schmilz公司制造的盘式制动器的Actros货车问世以来，受到了严重的挑战，已面临被淘汰的危险，盘式制动器以重量轻，麻损小，便于维修的特点闻名于世。为了降低自重和经营成本。盘式制动器不仅用于主车的前、后桥     

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；     

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。     

国外装有盘式制动器的重型挂车车桥产品及其结构特点

1 盘式制动器 长期以来独霸汽车制动器领域的鼓式制动器，自从1996年世界汽车之父戴姆勒一克莱斯勒装有Schmitz公司制造的盘式制动器的Actros卡车问世以来，受到了严重的挑战，已面临被淘汰的危险，盘式制动器以重量轻、磨损小、便于维修的特点闻名于世。为了降低自重和经营成本，盘式制动器不仅用于主车的前后桥上，而且也装配在挂车车桥，2000年，国外装配盘式制动器的桥已占到了所有桥总成的一半以上。     

鼓式制动器摩擦副压强不均匀性分析与评价

定义了鼓式制动器摩擦片压强的两种不均匀度指数，推导了现有的不同机构型式的鼓式制动器的摩擦副压强不均匀度指数的计算公式，并分析了其变化特性。以这两种压强不均匀度指数作为新的评价指标，对各种型式的鼓式制动器进行了评价，揭示了一些型式的鼓式制动器所固有的缺点。提出了改进传统鼓式制动器的技术方向和途径。     

汽车制动器

影响行车安全的有很多种因素，其中汽车的制动系统可谓是汽车安全性能中首要的系统，汽车的制动器就是这个系统中的主要执行器，其作用是显而易见的。目前汽车制动器有两种形式，彭式制动器和盘式制动器。这两种各有千秋，但随着车辆车速的不断提高，近来年采用盘式制动器的轿车日益增多，尤其是中高级轿车，一般都采用了盘式制动器。     

重型汽车用盘式制动器的结构性能分析

介绍了四种常见的盘式制动器的结构及其特点，从制动减速度、制动时制动器起作用的时间、制动器的效能与摩擦系数的关系及迟滞量等方面对盘式制动器与鼓式制器进行对比、分析，说明盘式制动器在制动效能、制劝效能的稳定性以及制动时汽车的方向稳定性上比鼓式制动器具有明显的优势，理论和试验表明盘式制动器与ＡＢＳ、ＡＳＲ、ＥＢＳ等系统匹配时可简化系统结构、优化系统结构，并地重型汽车装用盘式制动器带来的制动系统的相关关系     

盘式制动器总成气密性工艺试验台研制及应用

介绍一种用于汽车盘式制动器总成气密工艺试验机，该试验机采用一种新型的工艺试验方法，即对盘式制动器总成做近似于定量的气密性试验，其先进性远远超过了行业中现行的定性的气密性试验。该工艺检测同用于生产后保证了制动器总成质量，消除了盘式制动器在整车上的渗油现象，并填补了国内在盘式制动器生产制造过程中的定量气密性检测的空白。     

汽车制动器衬片"热膨胀"原因分析及控制研究

为了解决汽车制动器衬片的“热膨胀”问题，分析了产生“热膨胀”的主要原因，并对影响“热膨胀”的因素进行了试验及分析。提出了控制或减轻制动器衬片“热膨胀”的措施。通过试验表明，无石棉制动器衬片的摩擦磨损性能、热膨胀率均优于传统配方半金属基无石棉制动器衬片和传统工艺无石棉制动器衬片。     

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.     

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.     

双级制动踏板机构性能分析

建立了一种双级制动踏板机构的运动性能、力传动性能和人机工程学分析模型,并根据此模型对两种轿车双级踏板机构性能进行了分析,提出了将双级踏板机构力传动比等效转化为单级踏板机构的计算方法。研究了制动过程中人体各关节运动角的变化,并依据此参数对踏板机构人机工程学进行评价。提出了双级踏板机构初始位置的设计方法,可保证制动踏板实际使用的最大行程点位于踏板总设计行程的中间位置,此时制动踏板比可达最大值。     

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.     

新型电控机械制动系统制动效能分析

在建立了汽车制动过程的动态分析模型、传统的液压制动器模型和新型的电控机械制动器模型基础上,通过计算机仿真对比分析了它们的制动效能。研究结果表明新型电控机械制动器比传统液压制动器具有响应速度快、制动效能高等优点。     

优化设计在汽车零部件轻量化中的应用

简述了优化设计的理论基础.建立了某车型驻车手柄组件有限元模型.并进行了该组件横向刚度校核和静强度校核,结果表明其横向刚度和静强度均满足标准要求.为实现该驻车手柄组件轻量化,分别对其支架和手柄进行拓扑优化和形貌优化.优化结果表明,新结构驻车手柄组件在满足横向刚度和静强度标准要求的同时使新结构支架质量减轻了3.5%.     

具有迟滞模拟记忆功能的奥迪盘式制动器可变线性模型

本文以奥迪１００盘式制动器为研究对象，建立了一种可模拟制动压力－力矩响应迟清点特性的可变线性模型，首先，介绍在ＪＦ－１３２型汽车制动器试验台上进行防抱制动器模拟试验的方法，其次，在获得大量试验数据的基础上，运用曲线拟合和优化技术，建立制动压力－力矩关系的线性模型，心滞模型为线笥模型，最后，在相同制动压力输入的前提下，把模型的理论计算民试验结果进行对比分析了模型的有效性和精确性。     

鼓式制动器低频振动的分析与改进

针对鼓式制动器低频振动严重的普遍问题,建立了鼓式制动器三维非线性动力学模型,并运用动力学仿真软件ADAMS进行了刚柔耦合仿真分析.基于领从蹄式制动器的结构特点,提出了前推模型,并与目前常用的后推模型进行对比分析,得出了前推模型的振动稳定性优于后推模型的结论.     

试验构建鼓式制动器的摩擦模型

针对鼓式制动器在高制动初速、高气压下制动力矩的台架试验值与设计值存在较大偏差的问题，对试验测量的制动器制动力矩进行二元线性回归分析，建立了鼓式制动器的幂函数摩擦模型。进行了显著性检验和失拟性检验，检验结果验证了所建立的摩擦模型有效，可提高整车制动效能模拟计算精度。     

Model-based control of an electropneumatic brake system for commercial vehicles

A properly functioning brake system is critical for ensuring the safe operation of any vehicle on roadways. Commercial vehicles such as trucks, tractors-trailers and buses are equipped with an air brake system that uses compressed air as the energy transmitting medium. This paper presents a model-based control scheme for an electropneumatic brake system for use in commercial vehicles. A mathematical model for an electropneumatic brake system was developed and corroborated with experimental data. A control scheme was developed based on this model and was used to regulate the pressure of air inside the brake chamber according to a desired pressure trajectory. This control scheme was implemented on an experimental test bench, and its performance was studied for various values of the controller parameter. The control scheme was tested for various desired pressure trajectories reflecting actual brake operation.