超重车辆过桥措施的探讨

本文论述了桥梁实际承载能力方法确定及超重车辆过桥的一般要求;同时阐述了桥梁加固措施.     

商用汽车发展趋势探析

分别从商用汽车的发动机技术和结构、变速器结构型式、行走机构型式和驾驶室结构等方面进行了阐述,并对其发展趋势进行了展望。     

SISUNA-140全道路车加装灭火装置的研制

通过对我国引进的ＳＩＳＵＮＡ １４０全道路车进行技术改造，使之更加适合我国东北林区森林消防的需要．整套灭火装置由水箱、管路系统、水泵几大部分组成，在不破坏原车结构、不改变原车行驶性能的前提下，加装灭火装置，可组成一台森林消防车；卸下灭火装置，又可恢复原车的功能．灭火装置结构合理，装拆方便快捷，灭火效率高，具有推广应用价值．     

纯电动汽车用动力电池性能评价方法研究

通过分析纯电动汽车用动力电池的放电特性,指出了目前对纯电动汽车用动力电池性能采用恒流放电方式进行评价不能较好地反映动力电池的实际使用性能.以ECE循环工况作为纯电动汽车常用工况,计算了EVERY电动汽车的放电电流特性,并与实验结果进行对比,表明计算结果与实验结果基本一致.在ECE循环工况时,动力电池的放电特性能够基本上反映纯电动汽车在实际使用工况下的放电特性,以该方法建立非恒流放电方式替代目前采用的恒流放电方式对纯电动汽车用动力电池的实际使用性能进行评价将更为有效.     

车辆气压制动安全保护装置的试验研究

采用气压制动装置的车辆,气压低是造成事故的主要原因之一。为保证车辆的安全运行,在气压制动系统中施加安全保护开关,控制发动机的点火电路(汽油机)或熄火电磁阀电路 (柴油机),可实现低气压时的自动保护。     

一种新型公路划线车的专用喷涂系统

简要介绍了一种新型公路划线车专用喷涂系统的设计特点和使用功能。     

Vehicles Scheduling Decision Support System

Under traffic conditions and vehicle capacity constraints, in view of commercial grou Plarge-scale vehicles Scheduling question characteristic, it proposes a solution framework. First, the customers are segregated into districts. Then the customer districts are assigned to vehicles using the vehicle scheduling model and heuristic algorithm. Third, the vehicle mutes are determined as a Traveling salesman problem. With the solution framework and by taking the a Chongqing commercial grou Pas the case, the authors designs the decision support system.     

Researching and Developing a Hybrid Electrical Vehicle

There are more than two power source in Hybrid Electrical Vehicle(HEV). By using of assist accelerating, power regeneration, Idle stop and power management, HEV gains more acceleration performance and more fuel economy and better gas emission than Conventional Vehicle(CV). With Integrated Starter and Generator(ISG) as a auxiliary power source, batteries and battery control module and power manage module as a Load leveling Device (LLD), two prototype HEV separately equipped Manual Transmission (MT) and Continuously Variable Transmission (CVT) was successfully developed.     

Electric Vehicle of Direct Torque Control System Based on TMS320LF2407 Controller

A fully digitized electric vehicle direct torque control system with DSPTMS320LF2407 controller is described. The system hardware and software structures are presented. The performance of the direct torque control system is studied by simulation with MATLAB. Based on the simulation of the induction motor, waveform of current, speed, torque and flux are obtained. The testing results are also presented. Experimental results show that the design is feasible.     

Maximum slat width for cooling efficiency of horticultural produce in wooden crates

The influence of wood package design on airflow distribution was investigated for forced-air cooling using horticultural produce simulators. The position of grooves on the container walls was tested using slat width of 100–200 mm and airflow rates ranging from 0.0005 to 0.003 m³ kg⁻¹ s⁻¹. The package opening configurations were compared based on their impact on the energy added to the system using a methodology previously developed. For this purpose, apples and sweet corns were taken as examples of produce from two different extremes in the respiration activity range. For airflow rates as low as 0.0005 m³ kg⁻¹ s⁻¹one groove at the bottom of the container produced a cooling process more uniform than the other one-groove configurations and even two grooves because of natural convection effect. If packing low respiration rate produce, increasing airflow rate could compromise the process energy efficiency because of air circulation obstruction for less vented containers. For high respiration rate produce enlarging open area above 2.4% would be recommended rather than increasing airflow rate to enhance cooling energy efficiency.