共查询到18条相似文献,搜索用时 156 毫秒
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汽车悬架用空气弹簧的开发与设计 总被引:7,自引:1,他引:7
中介绍的SYS300型空气弹簧为自由膜式空气弹簧,其主要部件是橡胶囊,它一般由内橡胶层,帘布层和外橡胶层以及成型钢丝圈硫化而成,密封方式采用压力自密封,帘线布是橡胶囊的主要承载部件,帘线角是空气弹簧设计中的一个重要参数,帘线角的不同选择会导致橡胶囊充气后最大外径有较大的变化,同时也会对胶囊强度即铺层应力造成较大的影响,非线性有限元数值分析技术,可为空气弹簧的设计提供一种较为可靠的手段。 相似文献
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空气弹簧由于其良好的振动特性,在车辆中有着广泛地应用,研究其刚度特性意义重大。本文首先通过工程热力学理论推导空气弹簧的力学模型,然后以某轻型商用车前悬架为研究对象,利用Matlab软件计算获得膜式空气弹簧在不同初始气压下垂向刚度特性曲线。结果表明:该膜式空气弹簧呈现明显的变刚度特性,并随着初始压力的增加,承压能力也增强、同时,初始压力越大,非线性特性也越明显。 相似文献
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汽车用膜式空气弹簧的非线性有限元分析 总被引:2,自引:0,他引:2
简述空气弹簧在汽车空气悬架使用中的优点,采用非线性有限元分析技术分析空气弹簧的非线性特性,得到不同帘线角的空气弹簧在不同载荷作用下的形变特性。 相似文献
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空气弹簧主要以橡胶囊式或膜式为主~([1]),笔者注意到几乎没有对气缸空气弹簧的研究。论文设计了一种带附加气室的刚度可调节的气缸空气弹簧。以热力学和流体力学相关知识,建立气缸的输出力和阻尼力理论计算公式,基于Matlab/simulink建立气缸空气弹簧的数学模型,得出了气缸弹簧模型刚度非线性特性,并分析了不同附加气室容积下的固有频率,随着容积的不断变大,固有频率逐渐减小。分析了不同节流孔开度对阻尼作用的影响。建立了四分之一空气悬架模型,验证气缸作为空气弹簧的可行性。并与被动悬架作比较,仿真结果表明气缸可以作为空气弹簧且优于被动悬架。 相似文献
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Jerzy Ejsmont Stanislaw Taryma Grzegorz Ronowski Beata Swieczko-Zurek 《International Journal of Automotive Technology》2018,19(1):45-54
Temperature is a very important factor controlling rolling resistance of road vehicle tyres. There are at least three different temperatures that may be considered as important factors controlling thermal conditions of the rolling tyre. The most common measure of the thermal conditions during tyre rolling is ambient air temperature. The other two are: pavement temperature and “tyre” temperature. Tyre temperature is the most difficult to establish, as temperatures of different parts of rolling tyres differ considerably, thus there is a problem to obtain representative values. In the authors’ opinion, air temperature is the most universal and reliable parameter to measure. The article presents results obtained in the Technical University of Gdańsk during laboratory and road measurements of different car tyres rolling on different pavements. The knowledge of rolling resistance characteristics is important for modelling car dynamics as well as fuel consumption. It is also necessary to establish proper test conditions in the future standardized on-road method of measuring rolling resistance. The results indicate that generally each tyre and pavement combination is influenced by the air temperature in a unique way, but at the same it is possible to propose some general influence factors that may be used to normalize measurements to the standard temperature of 25 °C. 相似文献
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测定汽车滑行阻力系数的方法 总被引:10,自引:1,他引:10
从汽车滑行运动微分方程入手,经过积分推导出滚动阻力系数和空气阻力系数与滑行初速度、滑行总时间和滑行总距离之间的关系,用滑行过程中3个瞬时点的记录参数组成方程组,再用MATLAB求方程组的数值解,即可求出汽车的滚动阻力系数和空气阻力系数。本方法只需一次滑行试验,既方便易行,又比较准确。 相似文献
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为了分析沥青混合料降温特性及其影响因素,通过室内测试密级配沥青混合料AC-13和大空隙沥青混合料OGFC-13的降温曲线,分析在不同试件厚度、深度、环境温度和空隙率下的降温特性,并计算有效碾压时间。结果表明:沥青混合料降温速率随着试件厚度、深度与环境温度的增加而逐渐降低,有效碾压时间也随之增长;密级配沥青混合料的降温速率、有效碾压时间与空隙率的关系不大,而大空隙沥青混合料的降温速率与有效碾压时间则与空隙率密切相关;建立了以厚度、气温、空隙率作为变量的沥青混合料有效碾压时间的预估模型。 相似文献
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汽车轮胎气压电子实时监测系统 总被引:9,自引:0,他引:9
轮胎气压不足,将增大轮胎的弯曲变形,加快轮胎的磨损,增大车轮的滚动摩擦阻力,从而导致油耗显著增加,特别是当汽车高速行驶时,更会削弱轮胎的承载能力,导致轮胎破裂漏气。以北美市场及德国BERU公司的产品为例,介绍了轮胎压力电子实时监测系统的技术和市场方面的最新发展趋势。 相似文献
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Myeong Jun Kim Tae Won Park In Kyeong Hwang In Chul Sung Hyoung Seok Kim Sang Do Na Sung Pil Jung Tae Hee Lee Kyung Up Mah Jae Yun Lee 《International Journal of Automotive Technology》2017,18(6):973-981
Worldwide, the tire market requires safe and eco-friendly tires. In this study, a self-inflating tire (SIT) was studied and manufactured. Self-inflating tire refers to a technique for maintaining appropriate tire pressure. An internal regulator senses when tire inflation pressure has dropped below the set air pressure. The tire boosts air through the valve when rolling and compressed air enters into the tire. This procedure keeps the tire air pressure at an appropriate level and increases tire safety. In this study, a regulator was used as a negative-pressure system. A check valve was selected the minute flow check valve depending on the shape of the configured system. In addition, the material of the tube was developed with excellent physical properties and resistances (elastic rebound, working temperature, etc.) owing to its complete compression and restoration. A tube performance tester was developed and a computer aided engineering (CAE) model was modeled for comparison with the test results. Using the tester and model, it was possible to optimize the shape of the tube and regulator. Finally, the reliability of the study was verified through the prototype test. The developed equipment and systems can be used for the manufacture of high-performance and safe tires. 相似文献
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