现代汽车电控巡航系统控制原理浅谈

介绍了巡航电控技术的作用、特点、类型、控制原理,其中着重介绍巡航电控系统两种执行器的控制原理.     

Improvement of circulatory circle design method forautomobile hydraulic torque converters

A design method to reduce the circulatory circle axle size for automobile hydraulic torque converters is proposed. According to the beam flow theory, the variety of the axle size has little effect on the characteristics of torque converters. Based on analyzing traditional design method, it’s found that the basic reason for oversize of axle is the unreasonable semi-empirical expression of the first and third arc radius. An improved design semi-empirical expression is proposed for passage car torque converters based on the analysis of several foreign mature torque converters, and an improved design method is established. The improved method is used to design a torque converter, and the results show that the circulation circle axle size reduces about 26% in the condition of keeping the same characteristics of the traditional method. It means the improved design method can better meet the design requirement of automobile torque converters.     

汽车气压ABS模糊控制应用研究

以汽车气压ABS为研究对象，利用Matlab／Simulink软件建立了两通道三传感器气BiABS的仿真模型。设计了针对气压ABS的自适应模糊控制器．通过横拟仿真，证实了自适应模糊控制气压ABS在壤小汽车制动距离、防止车轮抱死方面有明显的教果，分析了滞后时间、汽车总质量、汽车质心位置、路面附着系数和制动初始速度辱因素对气压ABS效果的影响．提出了“采用电-气制动方式减少滞后时间，取消传统制动总阀，增大前轮制动器因数和加装减速度传感器”等改进建议．     

电磁式汽车机油预热装置设计

通过对发动机机油预热及电磁加热方式的研究,开发设计了一套便捷、快速的非车载机油预热装置。本装置采用外接220V电源使电磁线圈通电并产生高频交变磁场,以达到预热发动机机油的目的;采用液压升降装置调节预热装置与发动机油底壳之间的高度,使该装置可适用于不同车型。本装置可以解决汽车在冷启动时发动机磨损严重和由于外界环境温度过低导致的启动困难等问题。     

拖拉机汽车电器单总线控制系统的研究

通过单片微机编译码控制拖拉机汽车电器，可使其电器大为简化，当单片微机检测到电器主令开关信号后，通过HSO输出相应的编码，再经译码器译码控制挂在同一总线上的负载使其接通或断开电源，从而达到以单总线控制多个负载的目的。     

“琴海”号和“民海”号小型沿海车／客滚装船总体设计

介绍了小型车／客滚装船“琴海”号和“民海”号的主要要素、特征和设计过程,通过对该姐妹船在营运中的调查和来自使用者的反馈意见,对该船的各项性能做出了比较全面和客观的评价,以便为以后同类型船舶的论证和设计工作提供参考。     

采用主付钢板弹簧的汽车悬架偏频

采用主付钢板弹簧的汽车悬架系统是非线性的,本文按非线性振动理论讨论前后悬架不能分开成单自由度系统的汽车悬架偏频的计算问题,分别给出了后悬架只有主簧单独工作和主付簧一起工作时汽车的悬架偏频计算公式。     

Objective evaluation methods of automobile riding comfort

There is much difference between GB4970 1996 Method of random input running test Automotive ride comfort and international evaluation methods, and the characters of automobile riding comfort is not discussed in detail. The measurement and evaluation methods are discussed. The ten axis vibrations exposed to human body in automobile are measured throughout road testing, and then the characteristic of automobile riding comfort is analyzed. An objective measurement and evaluation method of automobile riding comfort are presented. The results show that the difference generated by frequency weighting factors ωk and ωb is very little. The crest factor of vibration in automobiles is about 4~8 by time domain analysis. The percentage of each axis vibration is calculated, the results show that vertical vibration (z axis) at seat surface, horizontal vibration (x axis) at backrest and pitch vibration (rx axis) at seat surface are most important for comfort. The evaluation method in GB4970 1996 underestimates the vibration expose on the human body about 3 dB, which should be revised. Based on the results, a simple and convenient method for measuring vibration on automobiles is presented.     

汽车气压ABS模糊控制应用研究

以汽车气压ABS为研究对象,利用M atlab/S im u link软件建立了两通道三传感器气压ABS的仿真模型,设计了针对气压ABS的自适应模糊控制器.通过模拟仿真,证实了自适应模糊控制气压ABS在减小汽车制动距离、防止车轮抱死方面有明显的效果,分析了滞后时间、汽车总质量、汽车质心位置、路面附着系数和制动初始速度等因素对气压ABS效果的影响,提出了“采用电-气制动方式减少滞后时间,取消传统制动总阀,增大前轮制动器因数和加装减速度传感器”等改进建议.     

在用车尾气排放ASM检测系统的研究与设计

随着汽车保有量的增加,汽车的排气污染物造成的环境污染也日趋严重。介绍了国内外汽车尾气检测技术的发展过程、现状及趋势。对比了现行的几种在用车尾气排放检测方法的优劣。并在理论上对稳态加载试验法进行论证。论述了在用车尾气排放 ASM 检测系统的优越性,分析了 ASM 系统的工作原理,说明了 ASM系统的硬件组成,并依此开发设计出 ASM 检测系统及其控制系统。该系统可满足 ASM 稳态工况法检测的需要。