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Welcome to Journal of Automotive Safety and Energy,
汽车安全与节能学报

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  • 2013, Vol. 4 No. 2 Published on:25 June 2013 Previous issue    Next issue
    Progress & Prospects
    Innovation in Automotive Engineering: A look into the future
    Henning Wallentowitz
    2013, 4(2):  95-108.  doi:10.3969/j.issn.1674-8484.2013.02.001
    Abstract ( 2258 )   PDF (2391KB) ( 5904 )  
    Several countries’ governments are producing mandatory regulations of automotive engineering
    to reduce CO2 emission and fuel consumption. The electric vehicles are one of the results by engineers'
    special efforts. This paper gives a wider view of innovation of automotive engineering and a look into the
    future. Technology trends include that 1) More Intelligent driver assistance systems can be distinguished
    into safety functions, comfort functions, traffic efficiency improvement and environmental effect reduction; 2)
    Body technology is determined by the used materials with competition between multi-materials, steel, and
    carbon fibres; 3) Chassis technology is improved by integrated vehicle dynamics control, active suspension
    components and material application; 4) Drive trains are converted into hybrid-drives with intelligent solutions
    on the horizon for these hybrid gearboxes, but also for four-wheel drive systems; 5) Electronic control is
    focusing on central control modules, the mobile phone for quite new applications and inventions for car
    lighting.
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    Concept of intelligent environment-friendly vehicle and its recent development
    LI Keqiang, ZHANG Shuwei, LUO Yugong, WANG Jianqiang
    2013, 4(2):  109-120.  doi:10.3969/j.issn.1674-8484.2013.02.002
    Abstract ( 1395 )   PDF (1639KB) ( 2331 )  
    The concept of intelligent environment-friendly vehicle (i-EFV) and recent research progress were annotated to explore the next generation of vehicle. The i-EFV integrates three main components including intelligent information interaction, clean energy powertrain and electrified chassis while employing
    key technologies of structure sharing design, data fusion and control coordination to achieve comprehensive performance, in terms of traffic safety, comfortableness, fuel efficiency and environmental protection. Two typical i-EFV applications including intelligent battery electric vehicle and intelligent hybrid electric vehicle were revealed to prove comprehensive i-EFV advantage with two major foundational research problems in vehicle dynamics and control fields being proposed.
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    Automotive Safety
    Home-development of a technical platform with vehicle intelligent driving control system
    BAI Jie, BIAN Ning, LIU Yonghong, LIU Jifeng, CHEN Gan, ZHOU Jianguang, FANG Chi
    2013, 4(2):  121-129.  doi:10.3969/j.issn.1674-8484.2013.02.003
    Abstract ( 1500 )   PDF (1916KB) ( 3055 )  
    Intelligent driving control technology or advanced driver assistance system (ADAS) is a new trend in automotive electronic control technical development. A function- development technical-platform was established independently by Dongfeng Motor Corporation of China for intelligent driving control systems of vehicle control strategy to be appropriate for drivers' habit in China. The platform is based on Fengshen-A60, a Dongfeng passenger vehicle, using single radar or a stereo camera as the environmental sensor. Based on this platform, some functions of driving control strategies were proposed such as the adaptive cruise control (ACC) and emergency brake assist (EBA) of a cascade control structure with forward control. A control algorithm was used
    to program environment with Matlab/simulink based on the rapid prototyping system. Ground tests validate these functions. Therefore, the platform can be used for development and testing of integrated chassis control systems and vehicle comprehensive control systems in the future.
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    CAE optimization for rear door opening in MDB side impact test for a vehicle
    LI Fei, E Shiguo, QIAO Xin
    2013, 4(2):  130-135.  doi:10.3969/j.issn.1674-8484.2013.02.004
    Abstract ( 1548 )   PDF (1651KB) ( 1754 )  
    Rear door opening took place in an MDB (moving deformable barrier) side impact evaluation test for a vehicle. A simulation model with completely the same conditions as those of the test was established based on CAE (computer aided engineering) simulation to solve this problem, with the model simulated using LS-DYNA software. The simulation results agree well with the test results. The reason for door opening is that the local mount area where the rear door outer handle was located had serve deformation and distortion, resulting in the outer handle opening operation in side impact. The optimized structure test result is the same as the simulation. The optimized structure is obviously improved compared with the original structure. The results show that a well correlated model is the basis for solving the problem. Therefore, CAE correlated optimization analysis ensures the design target and product development plan with less development time and cost, and with less test times.
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    Effect of high-density structural foam on crashworthiness of vehicle front side-rail and its application
    LV Xiaojiang, LIU Weiguo, YAN Xianhua, ZHANG Haiyang, ZHOU Dayong, ZHAO Fuquan
    2013, 4(2):  136-141.  doi:10.3969/j.issn.1674-8484.2013.02.005
    Abstract ( 1509 )   PDF (1393KB) ( 2255 )  
    The crashworthiness of vehicle front side-rails was studied and then improved to reduce occupant leg injuries caused by offset impact. The bending crushing and axial crushing were analyzed with various sections in vehicle front side-rails using a finite element method. Improvement in the front side-rail extension,
    filled with high-density structural foam, was verified in an offset impact test. The results indicate that the deforming mode of the front side-rail extension is effectively controlled after filling high-density structural foam with the intrusion into the occupant cabin significantly reduced. The average load, total energy absorption, energy absorption per mass, and the axial force transmission capability are increased by nearly two times with improved front side-rail bending compared with ordinary front side-rail bending. The driver lower right leg tibia index is reduced from 0.97 to 0.38 with the driver lower leg tibia load obviously decreasing.Therefore, this design maintains the occupant cabin integrity and enhances the vehicle crashworthiness.
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    Design of asymmetric vehicle hood inner for pedestrian head protection
    2013, 4(2):  142-151.  doi:10.3969/j.issn.1674-8484.2013.02.006
    Abstract ( 1646 )   PDF (1388KB) ( 1991 )  
    Engine hoods are a main resource of pedestrian head injuries in vehicle-pedestrian impact. Six tests were made using child pedestrian head impactors, with the corresponding finite element model built and calibrated to improve pedestrian head protection. The energy absorption performances of five types of
    hood inner structures were analyzed using a finite element model (FEM), with an asymmetric vehicle hood inner then designed according to the engine compartment layout of a kind of vehicle. The results show that the head injury criterion (HIC) at several areas of the hood inner is reduced to less than 1300, a few of which to less than 1000. Therefore, the pedestrian head protection is significantly improved using the asymmetric vehicle hood inner.
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    National regulation comparison for special school bus betweens China and US and dynamic tests of school bus seats
    YANG Xin, XU Shucai, ZHANG Jinhuan, MA Chuns heng
    2013, 4(2):  152-160.  doi:10.3969/j.issn.1674-8484.2013.02.007
    Abstract ( 1605 )   PDF (1468KB) ( 2432 )  
    School bus safety has been attracting extensive public attention. China and US national regulations about special school buses were analyzed and compared in vehicle structure crashworthiness and occupant protection. The two countries have different understandings in guaranteeing vehicle living space and effectively reducing the occupant secondary collision injuries. Seat impact tests were carried out 30 times for a China school bus and a US school bus according to the forward resistance test method of the new special school bus regulations of China using an impact sled at the Automobile Crash Laboratory of Tsinghua University. The results show that all the allowed indexes of the dummy can reach the new national technical requirement of China, including the head injury criterion (HIC), the thorax acceptability criterion (ThAC), and the femur acceptability criterion (FAC), with differences existing between US and China in school bus seat framework, manufacturing technique and structure intensity.
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    Automotive Energy Efficiency & Environment Protection
    Influence of sulfur content on the durability of automotive catalytic converters
    GUO Xin, ZHENG Shujia
    2013, 4(2):  161-168.  doi:10.3969/j.issn.1674-8484.2013.02.008
    Abstract ( 1322 )   PDF (1968KB) ( 1704 )  
    This paper studies the impact of the gasoline sulfur content on the durability of vehicle exhaust catalytic converters which can be used to reduce vehicle emission. Thermal aging test and chemical aging test were made separately based on the mechanism of catalytic converters. Engine bench tests were made with an R-FOCUS burner simulation system to evaluate converter durability for 1×105 km using two kinds of fuels with one with sulfur content of 150 μg/g and the other with sulfur content of 50 µg /g, which meet China standards Ⅲ and Ⅳ. The ignition temperatures and oxygen storage capacities of the catalytic converters were measured before and after each test. The results show that the thermal aging has greater impact on the catalytic converters compared with the chemical aging and that high temperature desulfurization process can properly recover the catalytic converter poisoned by sulfur for fuel with sulfur content of 150×10-6.
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    Miniature-Shaker Spectral Tests of Switched Reluctance Motor Stators
    MATHIEU Olivier P. J., ANTHONIS Jan, GYSELINCK Johan, LI Jianqiu, SONG Ziyou, FAID Saphir
    2013, 4(2):  169-177.  doi:10.3969/j.issn.1674-8484.2013.02.009
    Abstract ( 1751 )   PDF (1689KB) ( 1859 )  
    The switched reluctance motor (SRM) benefits from attractive features making it a much suitable candidate for electric vehicle powertrain applications. However, the troublesome acoustic noise, originating from the SRM stator modal deformations, is still to be overcome. The present investigation established a reliable measuremen  procedure to assess the SRM stator structural dynamics. A miniature-shaker spectral test was implemented and compared with the more conventional impulse hammer test. After assessment of the transfer paths reciprocity and modal analysis of the measured frequency response functions (FRFs), a clear mapping of the structural behaviour of an SRM stator was established. The determined modal parameters were correlated
    to previous theoretical and experimental research results. The final outcome is to provide new insights for designers willing to develop the next generations of SRMs.
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    Latest developments of fuel cell vehicles and hydrogen supply infrastructures in American
    WANG Molin, WANG Hewu, OUYANG Minggao, JIANG Fachao
    2013, 4(2):  178-184.  doi:10.3969/j.issn.1674-8484.2013.02.010
    Abstract ( 1310 )   PDF (1122KB) ( 1765 )  
    Fuel cell vehicle commercialization is a goal of automobile enterprises in many countries with only few demonstrational researches made in China. This paper surveys the researches and developments of fuel cell vehicles in the United States, including the research input, mass-production and the commercial demonstration in recent five years and analyzes the market progress of fuel cell buses, light-duty vehicles and forklifts. The results show that a large number of supporting technologies are being researched and developed in the United States, resulting in fuel cell cost rapidly reduced and hydrogen supply infrastructures constructed in perfect order. Fuel-cell-vehicle commercial application becomes valuable for some specific areas such as fuel cell forklifts and buses with light-duty vehicles still not meeting the requirement of commercialization. Suggestions are given for the fuel-cell-vehicle commercialization in China in consideration of the results mentioned above.
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