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为了缩短混合动力汽车开发时间,减少开发成本,本文以插电式并联混合动力汽车为研究对象,针对设计指标进行动力系统参数匹配以及使用AMESim软件搭建了整车模型,然后设计了基于门限值的能量管理策略并使用AMESim软件中的Signal,Control库进行搭建。之后对已搭建完成的车辆进行动力性经济性仿真分析,其中经济性分析是在NEDC工况下进行的,验证了本文所搭建策略和整车模型的正确性和可行性。 相似文献
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混合动力汽车的动力耦合系统结构和参数匹配影响整车性能,通过对动力耦合系统的结构选择、参数匹配和控制策略的研究,以传统汽车的差速器作为动力耦合器并建立模型,并对此模型进行参数匹配,通过使用ADVISOR软件中修改控制策略模块,并将修改后的Simulink模型嵌入ADVISOR软件中进行仿真,验证选择方案对于改善汽车动力性和燃油经济性的有效性。 相似文献
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文章研究了重型商用车辆分别采用推荐道路阻力与实测道路阻力对在底盘测功机上进行整车油耗试验的结果差异。结果表明,采用推荐道路阻力不能真实反应出车辆的油耗水平;底盘测功机的阻力设定直接影响车辆的油耗结果,阻力设定值越大,油耗越大,反之越小。 相似文献
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对于广大中国运输企业来说,燃油费用直接关系到车队的盈利能力及竞争实力。据统计,在车队整体运营成本中,燃油费用所占比重高达40%。与此同时,燃油的过分消耗,更是导致资源耗竭、温室效应加剧的幕后元凶。因此,面对居高不下的油价,以及政府节能减排的政策导向,如何既保证运输的安全、效率,又有效降低燃油消耗,正成为越来越多运输企业共同关注的焦点。在大家关注节油的同时,也许很多人会忽视轮胎与油耗的关系。事实上,在车辆的行驶过程中,有将近三分之一的油耗是用于克服轮胎的滚动阻力。那么,该如何从轮胎做起,来降低油耗呢? 相似文献
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文章从汽车管理者的角度探讨如何实现节约车辆油耗。根据汽车的工作原理,分析造成汽车油耗增大的机械因素,从驾驶员不良驾驶习惯分析,由于驾驶员自身的因素造成汽车油耗增大,最后从燃油的正确使用分析造成汽车油耗增大的又一因素,针对造成汽车油耗增大的三个主要因素,从车辆的保养制度的建立与保养质量的监督,到专职驾驶员考核与奖罚制度,逐层分析如何制订有效的管理措施,落实管车、管人的管理手段,通过具体的考核与监督,最终实现车辆油耗有效节约的管理目标。 相似文献
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Pedestrians as compared to vehicular traffic enjoy a high degree freedom of movement even in heavily congested areas. Consequently, there are more alternative links available to pedestrians between a given origin‐destination (O‐D) pair. This paper describes a study done by the University of Calgary to evaluate the factors affecting the choice of route on intra‐CBD trips or trips within the Central Business District (CBD). An origin destination survey conducted in downtown Calgary, Alberta enabled the identification of the most significant factors influencing the choice. These factors were analyzed in relation to the physical characteristics of the location, personal characteristics of the trip maker and the type of the trip. It appears that most people chose the shortest link and factors such as the level of congestion, safety or visual attractions were only secondary. This suggests that the length should be made a major consideration when planning and designing pedestrian links. 相似文献
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《Transportation Research Part A: General》1991,25(6):407-418
The main deficiency of most current modeling approaches to transportation can be identified as neglect of the integration of existing geographical knowledge in regard to the ex ante transport/land use modeling approaches, with its focus on territorial dynamics and theory development. This paper addresses this aspect of the problem by introducing a theoretical and methodological framework for the analysis of the interrelationship between land uses. The analysis attempts to determine to what extent the functional land use in a city can be considered an ordered pattern. The order sought does not rely on purely spatial configurations, but on the correlation of transportation and land use. The first section of this paper focuses on theoretical considerations. It stresses the fact that conventional approaches do not apply in the present context. It then suggests an alternative based on areas of influence and measured in terms of level of attractance of land uses. The second describes a procedure based on this alternative following the remarkable contribution of Hanjoul, Beguin and Thill. An application of this procedure to the analysis of Shanghai is then examined. Finally, an evaluation of the strategies for optimizing the interrelationship between land uses is presented. The paper concludes with a possible research agenda. 相似文献
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介绍了城市轨道交通工程中杂散电流不同的监测系统的构成,分析了集中式、分散式和智能型等监测系统的配置和功能,以及智能型实时在线监测系统的重要意义,为轨道交通工程杂散电流监测系统的选择与应用提供参考。 相似文献
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明确埋地管道防腐保温层的技术评价标准,对埋地钢质管道的安全运行,延长管道使用寿命具有重要意义。为了对埋地管道防腐保温层做出有效评价,从间接检测与开挖检测2个方面,结合现场检测数据,提出了基于防腐保温层的电流衰减率、绝缘电阻率、质量状况与厚度的分级评价标准及基于4种评价指标的综合评判方法。工程实践表明,该评价标准对防腐保温层是否存在失效能做出有效判断。 相似文献
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天然气自动计量系统有多种组态软件,由于软件的不相通性,造成了计量系统数据采集的通用性差、数据传输与入库的时效性差、数据利用的可靠性低.结合各组态软件的实际情况,从设计上充分利用Oracle大数据处理能力以及Partition(分区表)的特性,实现历史数据的存储,应用WebService与COM+数据访问组件提供多层数据访问架构,采用OPC与DDE工业数据交换协议,实现了各站场计量数据的实时上传,为连续数据采集和实时监控提供了可能,节约了改造成本. 相似文献
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Joseph N. Prashker 《Transportation》1979,8(4):329-346
Reliability of travel modes was found to be the most important characteristic of transportation systems in several attitudinal investigations of individual travel behavior. This paper represents the first part of a research effort aimed at gaining a better understanding of the characteristics of reliability of transportation modes in urban travel. In this research, reliability characteristics are identified; their importance relative to each other is assessed, and an insight into possible structure of an objective reliability index is discussed. The research is based on perceived values of reliability, which were identified through a large attitudinal survey conducted in the Chicago metropolitan area. 相似文献
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