国内车用摩擦材料行业分析报告

摩擦材料是用于诸多运动机械和装备中起传动、制动、减速、转向、驻车等作用的功能配件。按功能及安装的部位主要分为制动器衬片和离合器面片。摩擦材料在汽车工业中属于关键的安全件,汽车的启动、制动和驻车都离不开摩擦材料,摩擦材料的好坏、优劣直接关系着人民的生命财产安全,其功能地位不言而喻。     

摩擦离合器与制动器的摩擦材料分析

从摩擦学的角度出发，对摩擦离合器与制动器的摩擦材料的性能，特点及失效的原因进行了分析，最后又对摩擦系数稳度这一概念进行了描述。     

摩擦材料的研究现状

摩擦材料的质量直接影响着车辆和动力机械的速度，负荷以及安全性。文章概述了摩擦材料的发展历史，介绍了国内外摩擦材料的研究现状，指出无石棉摩擦材料是摩擦材料的发展方向，并简述了目前几种无石棉摩擦材料各自的优，缺点。     

树脂含量对湿式离合器碳质摩擦材料摩擦磨损性能的影响

探讨了树脂含量对湿式离合器碳质摩擦材料摩擦磨损性能的影响，结果表明：树脂含量在20％－30％之间时，随着树脂含量的减少，摩擦系数的压力稳定性和转速稳定性都提高；当摩擦剂含量相同时，树脂含量对摩擦材料磨损量的影响很小；当树脂含量为20％时，在高转速，高比压条件下，没有出现明显的热衰退现象，摩擦材料的摩擦磨损性能较为理想。     

汽车制动摩擦材料的研究

７０年代中期，世界各发达国家开始禁止汽车使用石棉摩擦片，因此使新型汽车摩擦材料被推向市场。分析了汽车半金属摩擦材料的配方设计时所要注意的问题，并着重分析了汽车制动摩擦材料的摩擦磨损机理，以有其解决的基本方法。     

碳纤维增强汽车摩擦材料的研究

利用D—MS摩擦试验机研究了碳纤维增强汽车库擦材料的摩擦磨损性能。结果表明：碳纤维含量对摩擦材料的摩擦磨损性能影响显著，摩擦材料的摩擦因数和磨损率都随碳纤维含量的增加而减小，碳纤维的质量分数不宜超过5％。SEM分析表明，其摩擦磨损机理亦与碳纤维含量密切相关。     

汽车摩擦材料增强纤维研究综述

对汽车摩擦材料中增强的纤维选用做一综述性总结。探讨了石棉、钢纤维、玻璃纤维等在摩擦材料中应用优缺点及对摩擦材料的影响。     

柴油机HCCI燃烧特点及影响因素

本文简要介绍了发动机均质充量压缩着火(HCCI)燃烧的概念和特点,并进一步着重分析了柴油机HCCI燃烧的特点,以及影响柴油机HCCI燃烧的一些重要因素,如混合气形成方式、进气温度、负荷、废气再循环(EGR)、气门正时及压缩比等因素。     

Lane-following method for high speed autonomous vehicles

This paper presents a steering control method for lane-following in a vehicle using an image sensor. With each image frame acquired from the sensor, the steering control method determines target position and direction, and constructs a travel path from the current position to the target position either as an Arc-path or S-path. The steering angle is calculated from the travel path thus generated, and the vehicle follows the travel path via motor-control. The method was tested using a vehicle dubbed as KAV (Korea Autonomous Vehicle) along an expressway (Seoul Inner Beltway) trajectory with a variety of radii (50 m ∼ 300 m) while traveling at a speed of 60 km/h to 80 km/h. Compared with an experienced human driver, the method showed little much difference in performance in terms of lane-center deviation. The proposed method is currently employed for high speed autonomous driving as well as for stop and go traffic.     

Understanding high coupler forces at metro vehicles

Couplers of motor units connect the wagons mechanically, electrically and pneumatically. Nowadays they are also designed to meet crash requirements. Since the traction and braking forces are distributed along the motor unit, coupler forces occuring during operation are considered to be low. In most cases, this is actually true. However, towing away a defect motor unit by another motor unit can lead to high forces due to longitudinal vibrations, which may ultimately lead to a failure of the coupler or superstructure. Investigations on the behaviour of motor units operating in an European city have been carried out for about 3 years [Kühnel, A., Hecht, M., Udriste-Breazu, I., Geike, T. and Böhme, C., Kräfte beim Bergen liegengebliebener U-Bahnen—ein unterschätztes Risiko. ZEVrail-Glasers Annalen, Tagungsband SFT Graz, 2004, pp. 128–136; Udriste-Breazu, I., Böhme, C., Kühnel, A. and Hecht, M., Behaviour of Motor Unit Couplers in Towing Case. 4th International Symposium on Passive Safety of Rail Vehicles, Okt. 2003, Berlin, Germany, homepage www.ifv-bahntechnik.de.]. The research has always been focussed on the certain parameters and conditions of the motor units under study. Little effort has been made to theoretically study the problem on a general basis. The aim of this paper is to close this gap.     

车身钣金加热过程分析

主要采用ANSYS软件,对钣金进行瞬态热分析。模拟涂装车间在温差作用下,随着时间变化,钣金件出现的能量转移现象,评估车间生产工艺。     

车身钣金加热过程分析

主要采用ANSYS软件,对钣金进行瞬态热分析.模拟涂装车间在温差作用下,随着时间变化,钣金件出现的能量转移现象,评估车间生产工艺.     

车载蓄电池快速充电设备的研究

对传统的汽车电源系统提出了一种改进措施,介绍了一种新颖的车载蓄电池快速充电器,并研究了该充电器的设计方案,从硬件结构、软件编程两方面进行了讨论。实验证明：该充电器的各项指标均达到了设计要求,但在体积和成本方面还需进一步缩减。     

桥梁在车辆作用下空间动力响应的研究

结合公路桥梁的特点，视桥梁与车辆为一个相互作用的整体系统，以模拟桥梁在汽车通过时的空间动态响应。在分析中，桥梁的自振特性先由有限元法得到；车辆采用三维汽车模型，统一列出车桥系统的动力方程。将桥梁的自振模态代入系统，减少桥梁的自由度，采用Ｎｅｗｍａｒｋ－β逐步积分法求解系统方程。由于并不特别限定具体的桥梁形式和构造，可以考虑多车道、多车辆、不同的车速以及不同的车辆参数，车辆模型具有标准化的特点，因此     

电动汽车摩擦制动器的轻量化设计

本文主要对制动器的性能要求,在某一附着条件下所需的制动器制动力,在制动过程中的能量负荷及约束条件进行了描述,并运用遗传算法对摩擦制动器轻量化进行计算和设计     

Road classification for two-wheeled vehicles

This publication presents a three-part road classification system that utilises the vehicle's onboard signals of two-wheeled vehicles. First, a curve estimator was developed to identify and classify road curves. In addition, the curve estimator continuously classifies the road curviness. Second, the road slope was evaluated to determine the hilliness of a given road. Third, a modular road profile estimator has been developed to classify the road profile according to ISO 8608, which utilises the vehicle's transfer functions. The road profile estimator continuously classifies the driven road. The proposed methods for the classification of curviness, hilliness, and road roughness have been validated with measurements. The road classification system enables the collection of vehicle-independent field data of two-wheeled vehicles. The road properties are part of the customer usage profiles which are essential to define vehicle design targets.     

浸水轿车的检修策略

浸水轿车的维修十分困难。本文通过分析轿车浸水时的实际情况和浸水程度,划分其损坏等级,并提出检修策略。该策略可为汽车维修厂提供参考。