The Blind Zone for the Driving Car

[交通会议论文数据库] Li Ying Cheng Zhongxian Yang Tingcui Zhao Xiong Zhou Hongwu Luan Hengxin

摘要:inherent blind area and dynamic traffic blind area.The paper analyzes the cause of blind area,and provide engineering

2010中国城市公共交通学会技术专业委员会年会工作报告

[交通会议论文数据库] 冯幸福

摘要:本文总结了2010中国城市公共交通学会技术专业委员会年会上的工作报告，提出进一步加强组织管理工作的建议。

Power-loss Estimationfor Low Voltage Automotive PMSM Inverter

[交通会议论文数据库] Wu Zhihong Su Xiezu ZhuYuan

摘要:system performs well with fast system response and good thermal behavior which will guide real thermal engineering

Research on the Modeling of Anti-lock Braking of Motor in Electric Vehicle

[交通会议论文数据库] Li Qijun Chen Qingzhang Hou Fulai

摘要:　　By the analysis of operation mechanism of Brushless DC motor(BLDC),the electric braking mathematical model of BLDC with full bridge modulation is set up,and in combination with dynamic characteristics during electric braking,the simulation model of motor braking in electric vehicle is established in Matlab/Simulink.Fuzzy control strategy is adopted in the system,and bra king current is controlled by adjusting duty cycle to keep the slip rate within ideal range.The simulation results show that the ABS based on motor braking can be realized by adopting fuzzy control strategy,and the system is stable,with better static and dynamic characteristics.

Power and Emission Characteristics of Hydrogen Internal Combustion Engine

[交通会议论文数据库] Tang Hongyang Sun aigang Liu Fushui

摘要:　　To study the power and emission characteristics of hydrogen internal combustion engine,an experimental study was carried out using a 2.0 L port fuel-injected(PFI)hydrogen internal combustion engine.Test results show the power of hydrogen internal combustion fell 40%comparing to the gasoline ; NOx emission concentration is always higher than 8000ppm when the equivalent fuel-air ratio is larger than 0.8 and lower than 500ppm when the equivalent fuel-air ratio is smaller than 0.5.NOx increases with the increase of the ignition advance angle.When the equivalent fuel-air ratio is larger than 0.5.The test results and the conclusions exhibit a guiding role on hydrogen internal combustion engine optimizations.

交通运输信息化发展思路及展望--在2011年中国公路学会交通工程分会年会上的报告

[交通会议论文数据库] 洪晓枫

摘要:　　作者在2011年中国公路学会交通工程分会年会上的提出自己对交通运输信息化发展的新认识，“十二五”交通运输信息化发展的目标、重点、实施方案以及交通运输行业智能交通发展战略规划。

Automotive Air Conditioning Performance Study

[交通会议论文数据库] Zheng Xin Qi Kai Qiao Xin Kong Fanhua

摘要:　　By conditioning performance test of a model,it found that the mass flow of air conditioning inlet is not enough,resulting in air conditioning performance.This is the first time to optimize the design of the air conditioning inlet,and improve the overall performance of air conditioning,the effect is obvious.This is the first time to deal with the air-conditioning inlet problem using the CFD software,other paper usually used the experiment result.

Harpoon-shift a New Conception to Implement Gearshift in Transmission

[交通会议论文数据库] Fang Yuhong Zhang N. Paul .Walker

摘要:　　Traditional cone clutch synchronizer which is mostly used in vehicle uses friction to implement synchronization to accomplish gearshift.That leads to some disadvantages.In this paper a new mechanism concept named Harpoon-shift is proposed.It is designed as an alternative to the traditional synchronizer in automatic transmission.Harpoon-shift has simpler structure to manufacture than the traditional synchronizer.Additionally,a simpler electromotor control system is used to replace complex hydraulic system to change gears during shifting.Harpoon-shift will offers potential energy economy improvements by improved drivetrain efficiency and better vehicle ac celeration ability.Firstly the mechanical structure of Harpoon-shift is showed as virtual mechanical model designed by ProE.It has 5 main components including one idler gear with integral groove ring,one guide ring,one flexible component between the guide ring and the groove ring,one Harpoon-shift hub one Harpoon shift sleeve.Harpoon-shift makes use of an indirect engagement,which gives a pre-acceleration to the chosen gear to realize the smooth gearshift.The mathematic modeling,simulation and analysis of the new mechanism concept are presented in this paper as a separated part from gearbox.According to that the components of Harpoon shift are on the same shaft and the main motion is rotation.the modeling is built with one DOF.Mechanism engagement is demonstrated in rigid body models with detailed interactional torque models considering the geometrical limitation.to establish its variation over its process.The parameters e.g.mass,stiffness.angles of engagement are variable in simulation model.The parameter studying makes contributions to comparisons and optimization of Harpoon-shift structure.Then an optimized structure is chosen for comparison of torque interrupt with traditional synchronizer.which shows significant advantage of the new concept.

Effects of Two-Stage Injection on Mixture Formation of Opposed-Piston GDI Engine

[交通会议论文数据库] Wang Hao Zhao Zhenfeng Qian Jiance

摘要:　　Increasing the air inflow can reduce the residual exhaust gas coefficient in the cylinder at low-speed and low-load,but would cause mixture too lean in opposed-piston two-stroke(OPTS)gasoline direct injection(GDI)engine.Focusing on this issue,the strategies of two-stage injection for stratified mixture at the typical part load(2000r/min)were studiedwith CFD software.The models for fuel the scavenging process and spray were verified by tests.Simulation results show that,there is an optimal second injection time forproper mixing,with early or late injection resulting in unreasonable mixture distribution,the best second injection time at 60℃ ATDC.Thefuel quantities of the second injection significantly influencesthe mixture formation,the second injection account for a third of total fuel quantities resulting in reasonable mixture distribution in the cylinder.

Vehicle Revenue Improvement Research Based on Value Engineering

[交通会议论文数据库] He Banben Wu Qingguo Gao Bing

摘要:　　This article analyzes how to improve vehicle revenue from the perspective of value engineering.