汽车产业的发展需要汽车文化的繁荣

汽车文化促进汽车产业的发展,汽车产业的发展需要汽车文化的繁荣。在汽车诞生的百年历史长河中,汽车文化不断积淀,不断丰富。无论是德国,还是日本、美国,各个国家和地区的汽车文化因汽车工业的发展及发达程度,因地域文化和民族特性的一同,而各具特色。我国的汽车工业起步较晚,解放后才真正建立起民族汽车工业。由于受到资源、技术、人才,以及外部环境等方面的制约和影响,我国汽车工业在改革开放之后才获得迅猛发展。近几年来,中国汽车消费增长尤其突出。     

电喷轿车使用时的10个误区

因汽车排放法规逐步严格、燃油价格不断上涨,只有采用汽车电子技术才能够使汽车排放满足最新法规的要求,而另一方面是因以计算机为代表的半导体制造技术、可靠性及成本等也能够满足汽车排放的要求.     

汽车道路试验方法(七)

六、汽车平顺性试验方法(一)试验目的汽车行驶平顺性就是汽车在道路上行驶时,乘员不致因振动而感到不适与疲劳,以及货物、装备等不致因振动而损坏的性能。我厂过去所进行的有限试验中,主要是通过测定影响汽车振动的有关参数和汽车在各种道路上行驶的垂直加速度,以及行驶试验中人的体验来比     

汽车涉水导致发动机产生机械事故的原因及责任分析

近年来，因汽车涉水导致发动机机械事故时有发生。由此也造成汽车产品或维修质量纠分。本文从理论和实践方面分析了因汽车涉水造成机械事故的原因，探讨了事故分析方法步骤，事故责任划分及预防措施。     

汽车，世界将因中国而便宜

随着中国汽车产业的进一步发展,中国汽车必将利用其成本优势大规模走向世界,对世界汽车生产与消费产生重大影响,国际上汽车的价格也将会因中国汽车的出口而走低。     

夏季汽车运行中因高温产生的故障及应对措施

夏季汽车运行中因高温产生的故障 汽车在高温条件下使用,会给汽车运行带来很多故障,尤其是汽车长时间行驶、爬长坡及重车在恶劣道路行驶等,均会不同程度地因高温而出现故障。①夏季高温,冷却系的散热能力相对变差,发动机容易过热,水箱会随之出现“开锅”,或可能发生发动机“拉缸”事故。     

“汽车召回”是怎么一回事?

我们经常在报刊、杂志上看到“××汽车公司因××原因召回已销售的××万辆汽车”。如1999年“汽车与配件”第34期每周要闻中提到“戴姆勒——克莱斯勒公司16日宣布,公司因安全原因召回210万辆在美国销售的汽车”。     

汽车安全对本土汽车企业的影响

我国汽车产业在国民经济中占有相当比重,然而本土汽车企业的发展现状却不尽如人意。以交通状况为例,业内人士十分清楚,我国每年因道路交通事故死亡的人数居高不下,导致消费者和汽车企业开始高度重视汽车安全。本文以阐述汽车安全在汽车市场中的重要性为出发点,分析汽车安全对国     

沃尔沃卡车羊城套装上市

因首届中国(广州)国际汽车展览会的开幕,广州成为汽车媒体关注的热点.     

高速公路汽车爆胎的原因与预防

爆胎原因及危害 爆胎是因轮胎某一局部的机械强度受到严重削弱而突然爆破。爆胎一旦发生,轻则汽车将发生侧滑、甩尾;重则汽车将连续地翻滚。这样,不仅危及爆胎汽车自身的安全,而且会使来往车辆因躲避不及而发生连续相撞,造成重大交通事故。引发爆胎的原因很多,现归纳分析如下:     

实测道路载荷谱在新开发车型车身疲劳分析中的应用

根据新研发车和现有车型具有相同底盘平台的特点,提出一种利用现车道路载荷,快速进行新车车身疲劳分析和评估的方法。建立新车多体模型,放大现车道路载荷并结合轮胎接地位移为输入。根据车轮力传感器(WFT)载荷测量特点,正确地对模型加载激励,仿真得到车身载荷谱。选用合理疲劳分析方法预测车身寿命,以现车车身的疲劳分析损伤为目标,对不合格局部进行合理优化,最终新车车身达到设计耐久目标。     

Improvement of Vehicle Maneuverability by Direct Yaw Moment Control

This paper deals with a study to theoretically formulate an effective method of improving vehicle performance, particularly, its characteristics in the nonlinear region, and to verify the feasibility of the proposed method by calculations and examinations. In order to analyze vehicle characteristics in the nonlinear region, a new method of analysis was developed for determining yaw moment and side force of the vehicle with a parameter of the side slip angle at the center of gravity when its center of gravity point was fixed. The study with this new method found that direct yaw moment control by proper distribution of traction and braking forces on the right and left tires could provide a very effective means of stabilizing vehicle characteristics, specifically for acceleration and deceleration, and enlarging the limit of vehicle maneuverability.     

Improvement of Vehicle Maneuverability by Direct Yaw Moment Control

SUMMARY

This paper deals with a study to theoretically formulate an effective method of improving vehicle performance, particularly, its characteristics in the nonlinear region, and to verify the feasibility of the proposed method by calculations and examinations. In order to analyze vehicle characteristics in the nonlinear region, a new method of analysis was developed for determining yaw moment and side force of the vehicle with a parameter of the side slip angle at the center of gravity when its center of gravity point was fixed. The study with this new method found that direct yaw moment control by proper distribution of traction and braking forces on the right and left tires could provide a very effective means of stabilizing vehicle characteristics, specifically for acceleration and deceleration, and enlarging the limit of vehicle maneuverability.     

整车供电系统的设计

较系统地介绍整车供电系统的设计方法,分析整车供电系统相关零部件的设计要求以及产品的验证要求,在某新车型的开发中运用该设计方法,整车顺利通过耐久试验并投产,证明设计可靠。     

Bootstrap法在车辆故障检测中的研究及应用

介绍Bootstrap方法的原理并将Bootstrap方法应用于检测车辆中存在的故障,通过计算不同故障下的车辆样本之间均匀Kullback-Lcible距离的均值以及在给定置信度下的置信区间等特征值来反映被测车辆的故障种类。给出一种新的随机数产生器用在Bcotstrap法重采样中产生新的随机序列。以车辆卜的驱动桥为检测对象对该算法进行了验证,结果表明该算法能准确检测出驱动桥所存在的故障。     

电动汽车分级预充电回路及预充电阻选型匹配方法研究

为提高新能源电动汽车动力与安全,本文通过分析新能源电动汽车的预充电过程,介绍预充电阻的选型匹配方法。并提出一种分级预充的控制电路及其控制方法,避免因短路或较小阻性负载故障,导致预充电过程中预充电压始终上不去(电压始终降在预充电电阻R上)、预充电失败、后续主接触器不接通、无法继续工作等系列问题,增加电动车辆安全性。     

燃料电池轿车开发项目风险管理

燃料电池轿车将是今后新能源汽车的重要发展方向之一,这一全新的汽车开发项目随之产生的不同于传统汽车的风险将是决定项目成败的决定性因素之一.根据其特征,有针对性地开展项目风险管理,通过管理的内容及方法,将有效降低项目风险水平,达到项目预期目标.     

Sliding window method for vehicles moving on a long track

The rail is modelled as a simply supported beam in the vehicle–track coupled dynamics. The beam is formulated by a partial differential equation that is transformed into an ordinary differential equation by the method of mode superposition for numerical calculation. However, the size of the matrix that is formed by the mode-superposition method increases significantly with track length, which limits the calculation efficiency. Some methods have been developed to solve this calculation issue, but they diminish the merits of the vehicle–track coupled dynamics, which would systematically investigate the dynamics of a vehicle and a track from the entire vehicle–track system. A new method is developed to resolve this contradiction. First, a theory based on a sliding window is established to improve the computational stability with respect to the length and the window-movement ratio. Then, two methods, namely finite element method analysis and an analytical solution, are used to verify the accuracy of the new method, which is highly efficient when used in a vertical half-vehicle–track coupled model to calculate the vehicle response when the vehicle moves on a long track. The results of the vehicle response calculated with and without the sliding window show good consistency.     

A yaw-moment control method based on a vehicle's lateral jerk information

Previously, a new control concept called ‘G-vectoring control (GVC)’ to improve vehicle agility and stability was developed. GVC is an automatic longitudinal acceleration control method that responds to vehicle lateral jerk caused by the driver's steering manoeuvres. In this paper, a new yaw-moment control method, which generates a stabilising moment during the GVC command and has positive acceleration value and the driver's accelerator pedal input is zero, was proposed. A new hybrid control, which comprises GVC, electric stability control and this new control, was constructed, and it was installed in a test vehicle and tested on a snowy surface. The very high potential for improvement in both agility and stability was confirmed.     

汽车防抱制动系统性能试验研究与分析

ABS系统与车辆的匹配是一个亟待解决的课题。为了优化针对ABS系统性能的试验方法,通过一系列不同道路附着系数、不同车辆行驶速度及车辆负荷的工况下,做了相关道路试验,以验证ABS系统的性能,并根据对车辆制动减速度和车轮转速的监测结果,验证试验方法的规范性,提出了增加车辆横摆角度和横摆角速度以评价车辆制动性能的建议。