智能网联技术应用于混合动力汽车探析

文章简要介绍了混合动力汽车和智能网联技术的研究现状,阐明了混合动力汽车与智能网联技术相结合的意义。着重论述了在智能网联环境下混合动力汽车进行能量管理的优势以及混合动力汽车实现智能网联的技术要求,最后对未来二者的依托发展进行了展望。     

串联式混合动力公交车的参数选择

根据城市公交车的工作特点,对串联式混合动力公交车动力系统主要部件发动机、电动机、电池组等,提出了选择和设计原则,实现优化匹配,提高动力性、燃油经济性以及降低排放性能.     

基于混合动力城市客车控制策略的研究

介绍了三种典型混合动力城市客车的类型,并描述和分析了其各自控制系统的控制策略.同时对混合动力城市客车的应用及发展前景作了阐述.     

基于主轴转速的并联混合动力环卫车驱动方案设计

传统环卫车在城市环境下燃油经济性不佳且噪声大,混合动力环卫车则有着较好的燃油经济性和较低的噪声。本文从并联混合动力环卫车驱动系统结构与工作特性出发,设计提出并联混合动力环卫车的驱动方案,分析了动力单元工作特性,确定了发动机与电机参数,并通过样车试验反映了驱动方案的合理性。     

层内混杂纤维布约束混凝土柱轴压性能试验研究

试验采用三种纤维(芳纶纤维、聚脂纤维和尼龙纤维)混杂而成的IHFRP布.通过IHFRP布约束混凝土圆柱体、棱柱体的轴压试验,研究了其破坏形态、应力一应变全曲线、峰值应力、极限应变、延性性能.试验结果表明:IHFRP显著提高了柱的承载力,对于相同层数纤维布约束试件随着混杂纤维布中芳纶纤维含量的增加,承载力增长越显著;IH...     

船舶靠帮补给装置可达空间分析及运动学仿真

针对当前海上船舶间靠帮补给装置的不足，提出了一种混联式靠帮补给装置，使用串联式起重臂和并联式补偿装置的组合，可实现目标船甲板的覆盖以及对目标船的姿态补偿。根据设计的补偿装置结构参数，分析了装置的可达空间约束方程，利用工作空间极坐标搜索法结合Matlab软件得到了补偿装置的实际可达空间。使用三维设计软件进行补偿装置的建模，利用Adams软件的运动学分析模块对允许最大海况下满载的装置进行运动学分析，得到各驱动杆组的运动参数，有利于装置的进一步设计与完善。     

Expanding scope of hybrid choice models allowing for mixture of social influences and latent attitudes: Application to intended purchase of electric cars

Recently, policy makers’ expectations about the role of electric cars in reducing emissions have risen substantially. In parallel, academic research on purchase intentions has dramatically increased. Originally, most studies have focused on utility attributes and price. More recently, several hybrid choice models have been estimated to include the impact of attitudes on choice probabilities. In addition, a few studies have caught the attention to social influence. In contributing to this line of research, this paper reports the results of an expanded hybrid choice, which simultaneously estimated all these different effects in a single integrated model of purchase intention. Results indicate that the model performs well. Costs considerations contribute most to the utility of electric cars. Social influence is less important, but there is also evidence that people tend to take it into consideration when there are positive public opinions about electric cars and the market share becomes almost half of friends of their social network. The intention to purchase an electric car is also influenced by attitudes about environmental concerns and technology acceptance.     

Simulation of city bus performance based on actual urban driving cycle in China

This paper establishes the simulation model of a city bus on the basis of the EQ6110 bus prototype and its experimental data. According to the actual urban driving cycle, the fuel economy and the traction performance of the EQ6110 city bus have been simulated, and factors such as the driving cycle, the loss of power to engine accessories, the gear-shifting strategy, the fuel shut-off strategy of the engine, etc., which influence on the bus’s fuel economy, are also quantitatively analyzed. Some conclusions are drawn as follows: (1) driving cycles have a great influence on the fuel economy of a city bus; (2) under the typical urban driving cycle of the public bus in China, the engine fuel shut-off strategy can save about 1 to 1.5 percent of the fuel consumption; and (3) the optimized gear-shifting rules can save 6.7 percent of the fuel consumption. Experimental results verify that the fuel economy for the EQ6110 public bus is improved by 7.2 pecent over the actual Wuhan urban driving cycle of the current public bus in China.     

Transient characteristics of emissions during engine start/stop operation employing a conventional gasoline engine for HEV application

In this paper, we investigate the transient characteristics of combustion and emissions during engine start/stop operations in hybrid electric vehicle (HEV) applications. Hydrocarbon (HC) emissions during the initial 2^nd∼9^th cycles are found to be significantly greater when the engine is quickly started under the original engine calibration mode. Lower intake manifold absolute pressure (MAP) was also found to cause larger residual gas dilution and poor combustion, resulting in a higher HC concentration when the cranking speed was increased. The post-catalyst HC concentration was found in the way of initially decrease and then to increase again as the cranking speed was increased. A lowest concentration value was achieved at a cranking speed of 1000 r/min. Engine shut-down by fuel cut-off was shown to produce lower emissions than shut-down by ignition cut-off as one can avoid misfire of the last fuel injection cycle. The fuel deposited during the stop process seems to impact engine restart enrichment mostly during the initial 0.7 s for this engine, whose performance is dominated by the MAP transition characteristic and the time coefficient for fuel vaporization in this time period     

插电式混合动力汽车高电压部件设计及布置

根据整车设计要求,建立插电式双电机MG1/MG2+行星轮系混合动力汽车高电压系统方案模型。通过理论计算及工程分析确定高压电池组、高电压线缆、双电机MG1/MG2、变频器(转换器/逆变器)、空调压缩机等高电压部件的结构及关键参数。针对高电压部件布置的安全及可靠性提出建议。