探讨汽车变速箱电软轴手动换挡控制系统优化设计方法

在汽车行驶的过程中,特别是启动环节,换挡变速的流程对汽车行驶的安全稳定性至关重要。鉴于此种情形,本文提出了一种汽车变速箱电软轴手动换挡控制系统优化设计方法,能有效地保证汽车在行驶过程中变速箱换挡输出信号正确和快速响应,希望给汽车行驶带来不一样的体验。     

悬浮物直径和含量对岩心渗透率的影响

通过定量滤膜调整现场污水的粒度分布,采取岩心流动试验模拟方法,研究了浓度和直径不同的悬浮物注入水对地层所造成的渗透率伤害。室内岩心流动实验结果表明:岩心的物理特征大致接近时,给定悬浮物粒径,颗粒浓度越大,引起的渗透率损失越大;悬浮颗粒浓度一定时,颗粒粒径越大,引起的渗透率损失越大;以渗透率伤害15%为界,确定渗透率70 m D左右的地层,注入水中悬浮物控制标准为粒度中值2.6μm,含量3 mg/L。     

汽车牌照自动识别系统在公路收费口的应用

最近及未来的几年 ,上海市境内将建成多条高速公路 ,如何提高高速公路的服务质量 ,出入口的通行能力是一条比较重要的衡量标准。汽车牌照自动识别系统利用先进的摄像技术、图像识别技术和计算机技术 ,对抓拍图像进行正确分割和快速处理 ,自动识别出汽车的牌照号码 ,提升了高速公路的服务水平     

RFID中间件技术在汽车装配线中的应用研究

针对现有汽车装配业的生产特点,分析了RFID中间件系统在装配线中的应用需求,构建了一套面向汽车装配线的RFID中间件应用系统架构,描述了RFID中间件的功用及典型结构。对整个装配线系统、RFID读写器管理、数据过滤及消息传送几大关键环节进行了详细的阐述。整个RFID中间件平台中采用JAVA技术开发。     

汽车发动机压装机健康监测系统开发

针对汽车发动机压装过程中压装机工作状态缺乏有效监测的情况,使用C++语言开发一套汽车发动机压装机健康监测系统软件。此系统软件中采用频谱分析、功率谱估计和模态分析等方法对采集到的振动信号进行分析,得到振动信号的幅值谱、功率谱和模态参数列表,实现对压装机工作状态和结构特性的监测。在减速箱实验平台上对系统进行测试,结果显示:此系统能监测减速箱的振动状况,能准确辨别典型故障的频率成分。     

汽车主模型ABS轻量化后地板检测模块的设计制造研究

后地板检测模块在燃油车与电动车内饰切换时拆卸频繁,为操作方便,需将后地板模块轻量化。而传统铝制模块密度大,质量易超标,因此,有必要采用轻量化材料如丙烯腈-丁二烯-苯乙烯共聚物(ABS)塑料来制备后地板检测模块。ABS材料密度小,成本低,但硬度低,强度弱,表面光洁度差。为解决这些问题,采用铝制骨架与ABS模块喷漆相结合的设计方式,通过设计阶段的强度计算,确定了质量轻、强度与表面质量均满足要求的后地板检测模块的设计方法。     

Assessment of the static fit of automobile lap-belt systems on front-seat passengers

While automobile seat belts are recognized as reducing injury in frontal collisions, the lap belt can cause injury to the abdominal contents during impact. A lap belt which is malpositioned, i.e., above the anterior superior iliac spines (ASIS) of the pelvis before impact, is suggested as a causative factor in many of these injuries. A questionnaire was completed by 198 adult passengers on lap-belt fit as well as vehicle, anthropometric and behavioural factors. All measures were self-reported. The fit of automobile seat belts was also investigated in the laboratory to determine some of the factors thought important in the pre-impact position of the lap belt. Seven factors, subject size, subject sitting posture, clothing thickness, vehicle configuration, vehicle seat position, seat back angle and the handling of the belt by the occupant, were assessed on 51 subjects sitting in six simulated vehicles. The sample purposely included a disproportionate number of tall, short, heavy and thin subjects.

The questionnaire responses indicated that a high proportion (49%) of lap belts were found to be malpositioned in a normal sitting posture. Moving around in the seat, especially slouching, greatly increased the proportion of malpositions. It was noteworthy that wearing a heavy winter coat did not cause belt malposition. A high incidence of malpositioned lap belts was also found in the laboratory study with 42% of the belts having their centre-lines above the ASIS and 89% having part of the belt overlying the ASIS in a normal upright seated position with the seat in the middle of its fore/aft movement. Slouching in the seat significantly increased this proportion. The malposition rate was adversely affected by a forward seat position in a significant manner. There was a large increase in the malposition rate when the occupant attached the belt compared to when the experimenter attached it, with malposition rates of 43% and 19% respectively in the rearmost seat position. There was no statistically significant effect of clothing thickness on belt fit. Although statistically significant correlations between belt inclination and malposition were found, no clear-cut belt-angle existed above which satisfactory fit existed.     

反向映射法在双列圆锥滚子汽车轮毂轴承设计中的应用

通过对比分析国内外双列圆锥滚子汽车轮毂轴承产品系列的结构特征和参考目前国内(单列)圆锥滚子轴承设计方法,分析了反向映射法在双列圆锥滚子汽车轮毂轴承结构设计中的应用。     

吉林石化乙丙橡胶在汽车内胎制品上的应用

介绍了吉林石化三元乙丙橡胶(EPDM)在内胎制品方面的研制情况.胶料配方以丁基胶(IIR)为主,并用部分吉林石化J-2070、J-2080.配方最终确定为(质量份):IIR 75;EPDM 25;ZnO 5;硬脂酸0.8;硫磺1.5;促进剂2.0;补强填充剂65;软化剂30°试制的内胎制品各项物性指标性能良好,符合厂家...     

汽车自动挡变速箱换挡离合器装配系统的研发

根据汽车自动变速箱换挡离合器的结构和工艺特点,及生产信息化、网络化和多品种共线柔性化生产的要求,针对汽车自动变速箱换挡离合器的装配和检测,开发出一种具有环形结构的装配系统,并介绍了系统的功能和组成,探讨了该系统的控制方法。该系统已经进入实际应用,可较好地完成换挡离合器的装配和性能检测以及测试后的数据参数存储和分析。