基于DeviceNet的摩托车交流底盘测功机电控系统的实现

根据摩托车交流底盘测功机的功能要求和特点,提出了以DeviceNet作为主体的网络平台构架成的用于摩托车测试的现场总线控制系统。给出了电控系统的总体设计方案;具体论述了电控系统的硬件构成及PLC、变频器、上下位工控机等部分的功能;详细阐述了控制系统中的PLC、上下位工控机软件的设计与实现;最后通过比对实验表明本系统与国外同类设备相比,精度满足设计要求,性价比高。     

PLC在摩托车底盘测功机测控系统中的应用

本文根据电机闭环控制变频调速原理，设计了摩托车底盘测功机测控系统，阐述了PLC在该系统中的应用，并设计了硬件结构和软件流程。使系统实现了恒转速工作方式、恒转矩工作方式和自动道路负荷方式运行。     

摩托车交流底盘测功机电控系统的设计与实现

根据摩托车交流底盘测功机的功能要求提出了电控系统的设计方案；具体论述了电控系统的硬件构成及各部分的功能，并详细阐述了控制系统中的PLC、上下位工控机软件的设计与实现；介绍了在提高系统安全性、可靠性和抗干扰能力方面所采取的措施。     

利用比对试验的方法考核"DPC-1型底盘测功机"的精度

本文通过采用同一辆受试摩托车在三种不同摩托车底盘测功机上进行比对试验的方法，考核分析了天津大学科达测控技术公司研发的“DPC-1型底盘测功机”的测试数据的准确性和精度。     

基于当量惯量法的摩托车传动比的快速计算

提出了一种以摩托车传动比确定原则为指导,以功率平衡理论为基础,以当量惯量法为核心的计算摩托车传动比的快速、准确、实用的方法。并对DY125-2两轮摩托车进行了实例计算,计算结果与采用驱动力-行驶阻力平衡的直接计算法,底盘测功机测试,实车道路试验的结果均非常吻合。     

简易瞬态工况底盘测功机控制系统理论设计

参照GB18285—2005中简易瞬态工况法的规定,在对现有的测控系统进行改造的过程中,对简易瞬态工况底盘测功机控制系统进行了理论设计,分析了人机复合控制系统中的硬件设计和相应控制策略,提出了基于自动驾驶系统的测控方案。利用相应的硬件电路实现转矩的快速调节;采用电模拟技术对汽车行驶阻力和惯量进行模拟;综合应用预测控制、模糊控制和解耦控制理论,对底盘测功机力矩进行加载。理论分析与试验结果表明,系统有较快的响应速度。底盘测功机可以按照自动设定的测功机栽荷进行控制。     

摩托车采用VMAS排放测试系统的试验研究

在同一底盘测功机上，采用VMAS排放测试系统和CVS定容取样排放测试系统串联的形式对同一辆摩托车进行瞬态采样测试，并对排放测试结果进行了分析。对多辆摩托车采用同样的方式进行试验，对最终排放测试结果进行比较，找出了两种系统的相关性系数，说明VMAS系统适用于在用摩托车的检测。     

DPC-1型摩托车底盘测功机通过鉴定

天津内燃机研究所、天津大学科达测控技术公司研制的“ＤＰＣ－１型摩托车底盘测功机”于１９９９年９月１６日在天津市科委主持下通过市级鉴定。该测功机是室内进行摩托车整车性能台架试验及按１５工况法测量摩托车排气污染物进行工况循环控制的设备。经鉴定委员会专家认真评审，一致认为：该机在惯量模拟、阻力设定、计算机控制等关键技术上处于国内领先，研制是成功的；主要性能指标优于国标ＧＢ／Ｔ１４６２２９３和行标ＱＣ／Ｔ６０９３的要求；设计水平和测量精度均达到国外同类产品水平；填补了国内空白，属国内首创。建议尽快投…     

基于EtherCAT实时以太网的48英寸转鼓4WD汽车交流电惯量底盘测功机的设计

根据车辆底盘测试技术的特点,将EtherCat总线系统引入到车辆测试中,开发出基于EtherCAT实时以太网的4WD汽车底盘测功机。通过采用实时以太网技术以及多传感器采集和变频控制技术等多技术相融合方式,构建了汽车功率、排放、滑行、加速、动力等不同工况性能测试的平台。实车测试证明,该测试平台测试结果准确、可靠。     

简易瞬态工况法底盘测功机控制系统的开发

论文介绍了简易瞬态工况法底盘测功机控制系统的开发过程,对电涡流测功机的特性进行了分析。设计了控制系统模型,采用人机复合的控制策略,应用反馈预测补偿解耦和动态矩阵控制开发了底盘测功机控制系统。实测结果表明,控制系统控制效果良好,满足应用要求。     

摩托车底盘测功机道路行驶阻力允差设定判据的分析

国标GB 14622-2002、GB 18176-2002中对底盘测功机阻力设定误差作了明确规定,给出了两种设定方法。为了判定哪种方法更加科学准确,在实际操作中是否便于操作,本文结合理论分析和数学推导得出结论,可将道路行驶阻力误差最大值不超过6N作为简明的依据。     

Driving characteristics of a motorcycle fuelled with hydrogen-rich gas produced by an onboard plasma reformer

The driving performance and emission characteristics of a 125 cc motorcycle equipped with an onboard plasma reformer for producing hydrogen-rich gas were investigated. Butane with suitable air flow rate was induced into the plasma reformer to produce hydrogen-rich gas, which was used as supplementary fuel for the internal combustion engine. The motorcycle was run under steady and transient conditions on a chassis dynamometer to assess the driving performance and exhaust emissions.     

Development of engine oil using palm oil as a base stock for four-stroke engines

The use of palm oil as a base stock for an environmentally friendly lubricant for small four-stroke motorcycle engines is investigated. Palm oil was blended with mineral oil at different compositions to the viscosity requirement of commercial lubricant. A liquid additive package was added to improve the viscosity of the lubricant. A blend that meets the viscosity requirement was then chosen for physical and chemical property characterization and subjected to an engine test. The blend consists of 50.6% (wt.) palm oil, 41.6% mineral oil, and 7.8% additive package. The properties evaluated include viscosity, viscosity index, flash point, foaming characteristics, and wear scar. The engine performance and emission tests were carried out with a 125-cc motorcycle on a chassis dynamometer using a Bangkok Driving Cycle. Compared to a mineral-based commercial oil, the palm oil-based lubricant exhibits superior tribological properties, but offers no clear advantage on engine and emission performance.     

低排放摩托车用金属载体催化剂的开发及应用研究

制备了摩托车用金属蜂窝载体催化剂，选取CG、GS及GY6三款典型的125mL发动机，采用在线分析仪和CVS定容测试系统在底盘测功机上按R40工况进行催化剂的整车匹配和排放检测试验，并选取其中的CG款骑式车进行了1万km的催化剂耐久试验。检测和耐久试验结果表明：1）本文介绍的金属载体催化剂经匹配后，摩托车整车3种主要污染物的排放水平均低于排放限值（二阶段）的70％；2）催化剂经1万km耐久试验后基本没有劣化。     

轻型汽车排放开发方法的研究

提出了一种利用发动机台架稳态工况的排放值预测轻型车转鼓试验整车测试循环排放值的方法,利用发动机台架上15个代表工况点的相关排放值、循环当量时间、后处理器效率以及整车冷车启动状态的修正系数4个参数,计算推导出整车冷车启动测试循环的排放值,试验测试结果表明,根据发动机稳态试验结果预测的整车排放结果与整车实测结果基本一致,节省了整车试验成本和轻型车排放开发时间。     

On-road instantaneous speed measurements on powered two-wheelers for exhaust emissions and fuel consumption evaluation

An experimental investigation on instantaneous speed measurements with instrumented motorcycles was performed considering three typical urban trips, divided in twelve sections according to different road classes. The main kinematic parameters obtained by processing experimental values are presented and compared with those referred to standard cycles, confirming that real world driving conditions are hardly reproduced by statutory cycles.Several applications of measured data are then analysed. Exhaust emission and fuel consumption factors were calculated for different motorcycle classes by applying the functions of Copert, Artemis and Progress models and the Artemis traffic situation approach, considering typical average speed levels and the experimental values. Results are then compared in order to highlight the differences between applied functions and methodologies.A selection of speed profiles was also performed in order to define the emissive behaviour of two-wheelers on the chassis dynamometer: experimental emission and consumption factors for a Euro 3 scooter are related to calculated levels, while measured cold and hot exhaust emissions and fuel consumption of a Euro 2 moped are compared with the results obtained on standard and real world driving cycles, proving that the new speed patterns may be useful to define emissions and fuel consumption of these vehicles.     

不同比例甲醇汽油对整车性能影响的试验研究

通过在滚筒式底盘测功机上进行燃烧不同燃料的桑塔纳汽车的测试实验,定量和定性地分析了不同比例甲醇汽油（M15和M85）对整车动力性和经济性的影响。