东风EQ1061系列汽车制动系的使用和维修

分析了东风ＥＱ１０６１系我汽车制动系的特点和工作原理，以及易出现的故障和排除方法，并阐述了该制动系的调整，使用和维修方法。     

汽车制动系故障诊断

本文对液压，气压制动系的制动失效，制动不灵，制动托滞，制动跑偏等常见故障以及真空增压器和真空助力器的诊断及排除方法做了介绍。     

真空增压制动系统的发展与应用

真空增压制动是中，轻型载货汽车普遍采用的制动助力结构。我国最早采用的真空增压制动是仿日本五十铃ＴＤ系列的结构，为单制动总泵与单真空增压器及安全缸相结合的结构，随后又采用了串联制动总泵加双真空增压器的结构，这两种结构形式在可靠性，安全性，合理性等方面存在着不同强度的缺陷，因此，现在已采用一种新型的真空增压器为增压制动主要结构，以满足制动系统的结构，性能方面的多重要求。     

制动防抱死系统及其正确使用

简要论述了制动防抱死系统（ABS）的基本组成和工作原理，着重阐述了其正确使用方法以及制动防抱死系统和传统液压制动系相互配合的关系。     

汽车制动系故障诊断与排除

制动系技术状况的变化直接影响行车的安全性，对制动性能的检测和故障诊断尤为重要。制动系常见的故障是制动效能不良、制动施滞、制动跑偏等。制动系故障不仅在于制动装置本身，而且还与车架和悬架装置有很大联系。下面以真空助力液压制动为例，介绍其故障现象、原因和诊断过程。     

汽车列车制动系代作制点分析

本文分析了汽车列车单管路放气制动系的工作缺点及其存在的问题，而采用双管路充气制动系，可以提高汽车列车制动的稳定性和可靠性。     

柴油机排气辅助制动系结构性能分析

排气辅助制动系广泛用于柴油车上。它可使汽车下长坡时保持稳定车速，并减轻或解除行车制动系的负荷。分析了柴油车排气制动系的结构、原理及性能，提出了排气辅助制动系的操作、使用应注意的事项及其特点。     

液压制动系制动力不足或制动失灵浅析

现代轿车、客车及轻中型运输汽车几乎都采用双回路人力液压嗣动系。这种制动系在使用中由于机件磨损及损坏等原因，技术状态逐渐变坏，将导致汽车的制动效能降低，严重影响行车安全。其中，制动力不足或制动失灵是液压制动系的常见故障。熟悉此故障的现象及其原因并掌握其排除方法，对预防和减少交通事故是非常必要的。     

汽车防抱制动装置对制动系可靠性的影响

汽车制动系的可靠性是指汽车在所有能够行驶的各种条件下制动成功的概率，汽车防抱装置对提高汽制动时的安全性。尤其是冰雪路面上的制动时的安全性和可靠性有显著的作用，为了探讨装置对制动系统可靠性的影响，提出了一种评价方法 。     

国产斯太尔1491重型汽车气压制动回路

介绍了国产斯太尔１４９１／（６×４）、１４９１／（６×６）型两种车型的气压制动回路。该系列车型是我国重型汽车的主力车型，具有双回路气压式行车制动系，弹簧储能式驻车与应急制动系，并且采用排气缓速式辅助制动系及双管路挂车制动系。     

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。     

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.     

飞机牵引车全液压制动系统动态性能分析

分析了全液压制动系统的动态性能,并建立了全液压制动系统的数学模型.基于数学模型,应用Matlab/Simulink仿真程序,对全液压制动系统的动态特性进行仿真.并将仿真结果与气压制动系统和气顶液制动系统进行了分析对比,证明全液压制动系统具有良好的制动性能.     

“日野”EF100发动机烧瓦的原因

“日野”ＨＨ４４０车是一种操纵灵活轻便，视野宽阔，速度较高的４０ｔ半挂拖车。该车使用的是ＥＦ１００型八缸Ｖ型水冷四冲程柴油发动机，发动机经过几次大修，烧瓦后再修复，常常行驶不了几十公里甚至没下热磨合试验台，就出现烧瓦现象，产生此故障既有使用上的原因，又有修理上的原因，在分析故障原因的基础上，提出了正确的修理方法。     

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.     

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.     

Analysis of automotive disc brake squeal considering damping and design modifications for pads and a disc

The squeal noise occurring from the disc brakes of passenger cars has been analyzed by using the complex eigenvalue method numerically. The contact between a disc and two pads was analytically modeled as many linear springs and dampers in an effort to develop the improved equation of motion derived on the basis of Lagrange’s equation and the assumed mode method. The finite element modal analysis results for disc brake components constitute an eigenvalue matrix in the analytical equation of motion. The complex eigenvalue analyses based on the equations of motion are able to examine the dynamic instability of a brake system, which is an onset of squeal, by considering the disc rotational effect. Numerical analyses showed that the modes unstable in an undamped analysis became stable in a damped case, which illustrates the important effect of damping on the squeal instability in a brake squeal simulation. Then several modified brake models were suggested and investigated how effectively they suppressed the occurrence of squeal noise. The brake parts such as a pad chamfer and a disc vane were modified and the influence of pad chamfer and vane shapes on squeal occurrence was proved to be significant. The numerical results showed that proper structural modification of a disc brake system can suppress the brake squeal to some extent.     

制动减速度与制动响应时间的匹配设计及优化分析

制动减速度和制动响应时间作为商用车制动系统两项重要技术指标,直接影响车辆行车安全.本文通过对某款8×8车型的制动减速度与制动响应时间进行匹配设计、测试分析及设计优化,最终使制动减速度达到理想状态,制动响应时间大幅缩短,制动性能得到了大幅提升,进一步提高了整车的安全性.     

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.     

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.