汽车电动软轴式玻璃升降器系统及其运动仿真

介绍了汽车玻璃升降器的分类，电动式软轴玻璃升降器的组成及其工作原理。用UGII软件对某轿车车门板的曲率进行分析，根据分析结果和车门结构，设计了相应的电动玻璃升降器。介绍了仿真时升降器的机构约束方法，并用UGUII软件对其运动过程进行了仿真。     

绳轮式轿车电动玻璃升降器机构及设计要点分析

通过介绍电动玻璃升降器的结构及设计,尤其是对绳轮式电动玻璃升降器结构及设计要点的分析,重点讲述了玻璃升降器的结构设计过程和A面质量对升降器设计的影响。     

浅论汽车玻璃升降器的结构与发展

叙述了汽车玻璃升降器的基本工作原理和分类，在此基础上分别介绍了臂式玻璃升降器，柔式玻璃升降器和电动玻璃升降器的结构，特点及技术特性，最后给出了国内外车辆玻璃升降器的使用和发展状况。     

升降系统布置以及零件设计

随着科技的进步,人们消费观念的改变,消费水平的提高,玻璃升降系统已经变成汽车的一项标准配置。玻璃升降器经历了由手动到电动的转变。随着电动玻璃升降器大量普及,侧门由纯机械部件变成机电一体化的部件。升降系统作为一个系统部件,涉及呢槽、侧门钣金、玻璃、升降器、导轨等结构的设计及布置。本文重点阐述升降器原理及结构,常见问题处理方法,以期实现理论对工程实践的指导。     

电动玻璃升降器及其发展概况

介绍电动玻璃升降器的组成和基本工作原理，论述电动玻璃升降器的发展历史及目前技术水淮，并对其常见故障进行了分析。     

汽车电动玻璃升降器试验台的设计

介绍汽车电动玻璃升降器试验台(LB-1)的基本结构、工作原理及软硬件设计方案。此试验台能够满足汽车电动玻璃升降器的基本性能测试和耐久性能测试,并对测试结果进行储存和打印。     

汽车电动玻璃升降器的计算机辅助设计

介绍了齿条式电动玻璃升降器的结构及工作原理，利用Pro/Engineer2000i进行产品建模和运动分析。     

读者E-mail

软轴式——电动机驱动小齿轮旋转,并带动软轴在轴套内滑动,从而使玻璃托架在导轨上运动,完成玻璃升降的目的。 电动玻璃升降器与传统手摇式升降器相比,具有运行平稳、调节方便、遥控自如等特点。随着越来越多的智能系统在汽车中     

电动玻璃升降器过流保护分析及措施

在对汽车电动玻璃升降器过流保护问题的分析过程中，提出一种基于PPTC器件的过流保护措施。并在某车型的电动玻璃升降器上进行了PPTC器件过流保护措施的实施、测试和验证，其失效故障得到了有效解决。     

电动玻璃升降器

车门附件主要包括车门玻璃升降器、门锁、内外手柄、门锁操纵机构、门铰链及门限位器等。在中高级轿车上大部分采用电动式玻璃升降器，并逐步扩展到各种车型上。其主要目的是为了提高舒适性和安全性。     

Investigating the influence of rail grinding on stability,vibration, and ride comfort of high-speed EMUs using multi-body dynamics modelling

ABSTRACT

High-speed electric multiple units (EMUs) have been popularised rapidly all around the world and have become a major transportation method. Increases in running velocity and wheel-rail deterioration lead to excessive vibration and reduced ride comfort, which are common issues encountered in the operation of high-speed EMUs. While built-in sensors on a car body are able to detect abnormal vibrations in the car body itself, they cannot effectively reflect the ride comfort of passengers. Wheel-rail profile matching can improve the wheel-rail interaction, and rail grinding has thus been introduced as a practical solution to alleviating the aforementioned problems. Nonetheless, the working mechanism of rail grinding has not been investigated theoretically. This study develops flexible car body and human body models based on the rigid-flexible coupled method to systematically study the effects of wheel-rail wear and rail grinding on passenger ride comfort. Case studies show that the proposed models can predict the ride comfort of passengers accurately. It is also demonstrated that rail grinding can significantly alleviate excessive vibration and improve passenger ride comfort in the long term. A long-term investigation reveals that rail grinding can improve the smoothness of the rail surface and reduce the damage to the rail.     

汽车电动玻璃升降器耐久试验台设计

文章介绍了一款可以实现耐久试验及基本性能检测功能的电动玻璃升降器试验台。该试验台采用了可编程终端及PLC相结合的人机界面控制系统，能实现1台机器对4个车门进行耐久试验和基本性能的测试。通过实际工程项目，验证了试验台设计的正确性及其工作的可靠性，对同类型试验台的设计具有很好的参考价值。     

车门电动玻璃升降失效原因分析及改进

本文简要介绍了自制的汽车玻璃升降器耐久试验台。以某品牌轿车为例,分析了试验中绳轮式电动玻璃升降失效的主要原因、提出了改进措施,为今后电动玻璃升降系统的开发工作提供宝贵经验。     

柴油机共轨电控燃油喷射技术

电子控制技术是车用柴油机燃油喷射系统发展的必然趋势,而目前开发的共轨电控燃油喷射系统是发展的主流,其分为高压共轨系统和中压共轨系统两类,本文介绍该两类系统的基本结构和原理,并阐述共轨系统的现状及发展方向。     

Numerical modeling and dynamic simulation of automotive power window system with a single regulator

Door glass position errors that occur when an automobile door glass goes up and down not only reduce the basic performance of the door glass in terms of sound- and water-proofing, but also decrease the life span of the glass run and belt. Thus, there is a need for understanding the dynamic behavior of a door glass in order to reduce these errors. In this research, we analyzed the door glass behavior by developing a dynamic numerical analysis model for a single rail regulator type of door glass lifting system. We modeled the glass run and belt lip load as a non-linear spring-damper system to reflect changes in the lip load caused by door glass position errors in the analysis. We also introduced local coordinate systems to find door glass position errors during the lifting process. By using our model, the time spent on the up and down motions, the current, and the lifting resistance could be predicted with 4 %, 11 %, 3 % and 4 % of error, respectively, comparing with the test data. We confirmed the effects of imbalances and boundary conditions in the load and moment which occur during the door glass lifting process. We also found that the lip reaction force, coefficient of friction, overlap length and position of the lift line cause door glass position errors.     

Effects of FTP-75 mode vehicle fuel economy improvement due to types of power steering system

This paper focuses on fuel economy improvement according to the type of power steering system. Usually, a conventional power steering system is directly driven by the crankshaft of the engine with a belt, known as HPS (hydraulic power steering). However, there is some inefficiency with this system at high engine speeds. To improve this inefficiency, automobile makers have developed two power steering systems: EHPS (electro-hydraulic power steering) and MDPS (motor-driven power steering) or EPS (electric powered steering). However, there has been insufficient study of effects of the type of power steering system on fuel economy. In this paper, the effect of the type of power steering system on fuel economy is studied experimentally, and calculations of the effect on vehicle fuel economy are presenting using computer simulation with AVL cruise software. The results demonstrate that a 1% vehicle fuel economy improvement can be achieved in a vehicle with an electro-hydraulic power steering system compared to a vehicle with a hydraulic power steering system. In addition, a 1.7% vehicle fuel economy improvement can be achieved using a full electric power steering system in a FTP-75 driving cycle. These results could be used to choose a power steering system.     

共轨蓄压式电控喷油系统的喷油正时研究

介绍了共轨蓄压式电控喷油系统的工作原理。共轨蓄压式电控喷油系统喷油正时的控制采用开环控制方案，喷油正时的控制精度主要取决于喷油延迟时间的准确度，而喷油延迟时间主要受共轨油压和发动机转速的影响。具体分析了通过优化喷油延迟角MAP图来实现共轨蓄压式电控喷油系统喷油正时精确控制的方法。     

重汽国Ⅳ柴油机SCR系统介绍

汽车的节能环保已作为一个世界性的课题在全球范围内为人们所重视,我国随着国Ⅳ排放法规的全面实施,选择性催化还原(简称SCR)技术也逐渐应用于我们的生活和生产中。电控高压共轨+SCR技术是中国重汽实现国Ⅳ技术的主要路线,本文详细介绍重汽国Ⅳ车辆上配装的SCR系统的组成结构、工作原理及系统使用时的注意事项。     

电控发动机外置油门控制器

针对部分专用车辆装配电控高压共轨柴油发动机后,常规外置油门控制方法已无法使用的现象,研究设计出新型的电控外置油门控制器。本文主要介绍其技术要求及控制原理。     

Simulation of curving at low speed under high traction for passive steering hauling locomotives

The traction control in modern electric and diesel electric locomotives has allowed rail operators to utilise high traction adhesion levels without undue risk of damage from uncontrolled wheel spin. At the same time, some locomotive manufacturers have developed passive steering locomotive bogies to reduce wheel rail wear and further improve locomotive adhesion performance on curves. High locomotive traction loads in curving are known to cause the loss of steering performance in passive steering bogies. At present there are few publications on the curving performance of locomotive steering with linkage bogies. The most extreme traction curving cases of low speed and high adhesion for hauling locomotives have not been fully investigated, with effects of coupler forces and cant excess being generally ignored. This paper presents a simulation study for three axle bogie locomotives in pusher and pulling train positions on tight curves. The simulation study uses moderate and high traction adhesion levels of 16.6% and 37% for various rail friction conditions. Curving performance is assessed, showing forced steering bogies to have considerable advantages over self steering bogies. Likewise it is shown that self steering bogies are significantly better than yaw relaxation bogies at improving steering under traction. As the required traction adhesion approaches the rail friction coefficient, steering performance of all bogies degrades and yaw of the bogie frame relative to the track increases. Operation with excess cant and tensile coupler forces are both found to be detrimental to the wear performance of all locomotive bogies, increasing the bogie frame yaw angles. Bogie frame pitching is also found to have significant effect on steering, causing increased performance differences between bogie designs.