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1.
Summary A flat track tire testing machine developed by the IMMa group is described. It permits the simulation and study of the dynamic behavior of a great variety of tires under controllable and repetitive highly dynamic realistic working conditions in the laboratory for a diversity of vehicles, from motorcycles to light trucks. The machine incorporates: – a hydraulically operated tire support and loading system with wide operating ranges; – a computer controlled brake system to simulate braking maneuvers with ABS systems; – a complete sensorial system; – a data acquisition and control system continually monitoring and acting on the experimental variables, i.e., tire and belt speed, longitudinal slip, slip and camber angles, tire pressure, tire normal force, etc. As an application example, results are presented that adjust the parameter of the magic formula for a standard 175/70 R14 passenger vehicle tire. Accurate mathematical tire models are recognized as essential for the prediction of vehicle dynamic performances using simulation tools.  相似文献   

2.
汽车轮胎的早期磨损和爆胎   总被引:1,自引:0,他引:1  
李婷 《天津汽车》2010,(4):60-61
1汽车轮胎早期磨损的原因 1)轮胎气压不足或超载。轮胎长期在气压不足的情况下行驶,能加速胎体帘线的疲劳损坏,造成外胎爆破。胎壁擦伤,多系双胎并装,因气压不足或超载引起胎侧变形较大,使两胎间接触发生摩擦。  相似文献   

3.
轮胎模态试验分析的研究   总被引:5,自引:0,他引:5  
管迪华  彭会  范成建 《汽车工程》2005,27(6):691-695
为寻求对轮胎高阶模态参数的提取,对一子午线轮胎分别进行了单、双点激振模态试验分析的研究,并用LMS Cada—X中的FDPI方法及LMS Test.Lab中的PolyMAX方法进行了分析比较。结果表明,FDPI方法只能识别出低频范围的模态参数,而PolyMAX方法对高频段难以识别出的模态参数也可给出较好的结果。对轮胎这种具有很好的对称性的结构,双点激振可给出很好的重根模态。  相似文献   

4.
"犀牛盾轮胎安全防漏降噪技术"是由国内一批专家从1992年投入研究,1997年在广东地区试应用,随后的几年里,不断地通过实验、改进后,直到J2000年正式投入汽车售后市场使用,并且申请了美国专利技术和中国重点开发的新项目.  相似文献   

5.
汽车爆胎是一种极其危险的工况,通过数学公式难以准确表达爆胎轮胎的力学特性,试验研究难度较大。文章以Carsim软件中的205/45 R17型轮胎为载体,通过对爆胎轮胎参数进行修正,建立了Carsim内置轮胎爆胎模型。通过仿真计算,车辆发生爆胎会导致汽车偏离预期道路,车身向爆胎轮胎侧偏转,爆胎轮胎纵向力及侧偏力剧烈变化,导致受爆胎影响最大的轮胎纵向力变大3.5倍,侧偏力变大10.5倍,仿真结果为爆胎车辆稳定性控制研究提供了基础。  相似文献   

6.
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8.
The lateral tyre force versus slip angle and vertical load is obtained through specific tests on the single tyre or with a theoretical-empirical analysis with physical models. This study is about the possibility to use a third way: Executing a particular handling test, known as Force-Moment test, using a Flat Track Roadway Simulator (the Fiat-Elasis MTS FTRS). The understanding and the project of vehicle handling is strongly based on the knowledge of lateral tyre force response [1, 2, 3, 7].  相似文献   

9.
The lateral tyre force versus slip angle and vertical load is obtained through specific tests on the single tyre or with a theoretical-empirical analysis with physical models. This study is about the possibility to use a third way: Executing a particular handling test, known as Force-Moment test, using a Flat Track Roadway Simulator (the Fiat-Elasis MTS FTRS). The understanding and the project of vehicle handling is strongly based on the knowledge of lateral tyre force response [1, 2, 3, 7].  相似文献   

10.
自动变速器试验台的研制   总被引:6,自引:0,他引:6  
介绍自动变速器试验台的组成,研制工作中要解决的主要问题;较详细地介绍试验台传动系统、动力系统和控制系统的设计,尤其对控制系统的硬件组成和功能要求作了介绍。  相似文献   

11.
随机不平路面上的汽车强化试验研究   总被引:2,自引:0,他引:2  
虞明  赵济海 《汽车工程》1993,15(1):42-53
本文讨论了由载荷功率谱估算强化系数的方法,还研究了路面平整度、路面铺装和行驶车速等试验条件因素对汽车强化试验的影响,发现只有试验车速与实际使用常用车速接近,才能保证汽车构件上的载荷功率谱与实际使用相似。  相似文献   

12.
为提高汽车试验的精度和自动化程度,试验过程中可以采用机器视觉来提高试验效率和试验结果的准确性。试验中采用摄像机对被测量物体进行图像采集,由计算机对所采集的图像进行相关处理得到试验结果。试验过程能够实现自动化测量和自动记录试验数据,试验结果的准确性要高于传统的人工测量方法。因此,基于机器视觉的测量方法在汽车试验领域能够得到广泛的应用和发展。  相似文献   

13.
A radial-spring tire model was developed to envelop irregular features of a rigid terrain and redefine the terrain as an “equivalent ground plane” reflecting both the elevation and slope characteristic of the original terrain contacting the tire. Three different methods were proposed for defining the maximum deflection of the tire, thereby locating the “equivalent ground plane” and defining the radial tire force. Errors in the maximum tire deflections resulting from approximations in the solution procedure could be maintained below 3 per cent of the actual tire deflections when the tire model was tested on a rigid planar surface.  相似文献   

14.
可靠性和耐久性是汽车的重要使用性能之一,在汽车试验工作中占据十分重要的地位和很大的工作量. 可靠性试验是为了提高或确认产品、装置及零件的可靠性进行的试验的总称.可靠性试验的目的大体可分为:研制新产品、发现其弱点以改进设计;确认产品和零件的设计任务书;接受产品和保证产品质量;审查制造工艺的好坏等.  相似文献   

15.
简要地分析了常规拖滞扭矩试验机存在的问题,并对试验机的设计思路、基本结构、主要技术参数、试验方法进行了阐述。  相似文献   

16.
本文介绍了半自动化气密试验的构成、分类及工作原理。针对发动机泄露测试问题,提出了一种发动机总成试漏机的设计方法,并对其结构及工作流程做了简单介绍。最后,阐述了该技术对我国发动机行业发展的意义。  相似文献   

17.
轮胎翻新产业已经显示出强劲的增长势头。2009年1月1日,中国颁布了循环经济促进法,更为翻新轮胎产业带来了无限曙光。  相似文献   

18.
于自清 《路基工程》2006,(2):99-100
株六复线施工中河砂极度匮乏,采用机制山砂替代河砂。介绍机制山砂的物理性能指标与标准值的比较分析后认为,机制山砂代替河砂可以满足规程要求。通过机制山砂与河砂的应用比较,表明机制山砂拌制的砼坍落度大、和易性好,强度提高;通过掺入SWR减水早强剂,解决了机制山砂含泥量大的问题,既保证了工程质量,又收到良好的经济效益。  相似文献   

19.
陈杰 《汽车与配件》2010,(52):26-29
<正>苏州金龙以中型客车起家,想当年有中巴王的称号,海格客车也逐渐成为中国名牌。从2002年开始,海格在大型客车领域崭露头角,旗下S系列和Ⅴ系列在市场上的表现普遍较好,如果用户不刻意追求时尚,  相似文献   

20.
The use of advanced dynamic friction models can improve the brush-type tire friction models. This paper presents a 3D dynamic brush model based on the LuGre friction model. The model describes the dynamics of longitudinal and lateral tire friction forces, as well as the self aligning torque dynamics. It has been originally derived in a distributed-parameter form, and then transformed to a simpler lumped-parameter form with only three internal states. Both uniform and non-uniform normal pressure distributions are considered. The model has analytical solution for steady-state conditions. The steady-state behavior is validated with respect to “magic” formula static model, which served as an “ideal” benchmark. The lumped model dynamic behavior is validated by comparing its time-responses with original distributed model responses. The model parameterization with respect to normal force and other tire/road parameters is considered as well.  相似文献   

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