东风4型内燃机车铸钢轮心裂纹的分析及提高轮心使用寿命的途径

分析东风。型内燃机车铸钢轮心裂纹位置及裂纹产生的原因。针对裂纹产生的原因,建议改进轮心结构,加大轮心探伤检测的力度,并逐步实现轮心的寿命管理。     

Control of energy regeneration for electric vehicle

To extend electric vehicle (EV) running distance, the vehicle energy regeneration (ER) method and vehicle control strategy were designed based on the original vehicle braking system. The ER principle of direct current (DC) brushless motor was studied, the motor mathematical model and PI control method with torque close-loop were built. This control method was applied to pure EV and the real road tests were evaluated.The ER control does not make any significant uncomfortable influence brake feeling and can save about 10% battery energy based on 3 times economic commission for Europe (ECE) driving cycles.     

Torque distribution strategy for integrated starter/ generator hybrid bus implemented by fuzzy algorithm

A torque distribution strategy was designed by using fuzzy logic to realize the optimal control. Thevehicle load zones were dynamically divided into several zones by several torque lines to indicate the driversdemand and the high or low efficient operating areas of the diesel engine. The fuzzy logic controller withtrapezoid membership function and Mamdani rule reference mechanism was utilized. There are over 100 rulesused in this fuzzy-based torque distribution strategy which are sorted into four rule-bases. The fuel economyand acceleration tests were designed to test and validate the integrated starter/generator (ISG) bus perfor-mance using fuzzy-based torque distribution strategy. The fuel economy is improved 7.7% compared with therule-based strategy. Finally the road test results reveal that there is about 157% improvement of fuel economy.And the 0-50 km/h acceleration time is 9.5% shorter than the original bus.     

智能公交系统运营优化数据库建立方法探讨

城市公共交通运输是城市客流运输的主要形式之一,智能公交系统是公共交通的发展趋势.在分析智能公交系统数据处理流程和公共交通客流采集技术的基础上,研究了智能公交客流基本数据采集技术,探讨了常规公交、轨道交通和出租车交通客流的筛选分析方法.     

汽车客运站公共关系研究

探讨了汽车客运站公共关系的内涵,指出汽车客运站公共关系由客运站企业、传播媒介、旅客公众三个要素构成;汽车客运站公共关系经营活动应遵循以事实为基础、以社会效益为依据、以满足公众需求为出发点的原则。     

新型混联式混合动力客车动力系统分析

分析了新型混联式混合动力客车动力系统的结构特点和总体布置,介绍了该系统的主要控制策略.根据汽车动力学原理,计算出了该混联式混合动力客车动力系统的基本参数,并分析了该方案在中国典型城市工况下的动力性能;建立了车辆的仿真模型,计算了车辆的动力性和经济性.仿真结果表明,采用该方案的车辆动力性较原车有一定程度提高,燃油经济性较原车有明显改善.     

从“青兰山”30万吨原油码头工程总承包谈设计单位的总承包管理

分析"青兰山"30万吨原油码头设计施工总承包(EPC)的一些特点,指出了以设计为主体的总承包管理模式的优势和弱点,提出了相应对策措施。     

车辆——轨道耦合系统随机振动分析

将轨道高低不平顺视为平稳各态历经随机过程,利用车辆－轨道耦合动力有限元计算模型,对车辆－轨道系统垂向随机动做了计算,在时域和频域内对系统响应作了分析。     

学习、贯彻修改后的产品质量法保证交通运输、工程建设质量

提高产品质量是一项复杂的社会系统工程,公路和水运工程建设质量、运输服务质量对国家、对人民都是至关重要的,交通系统的各级领导和员工应为此做出贡献。     

欧洲标准：道路标线材料—道路标线的使用性能（prEN1436：1997）

1范围 该标准规定了白色和黄色道路标线的使用性能,如在日光和路灯下的反光,辆前灯照射下的逆反射,颜色和防滑性等.