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Global Electric Vehicles Market to Grapple with Economic Uncertainty in Near Term, Resurgence anticipated post-COVID-19 全球电动汽车市场将在短期内应对经济不确定性,预计将在新冠疫情后复苏
Pub Date : 2020-01-01 DOI: 10.35248/2167-7670.20.9.192
Nikhil Kaitwade, S. Ingale
The scope and market attractiveness for electric vehicles (EVs) has been surging since the past several years. This is in response to growing calls for environmental sustainability and reduction in carbon footprint. Presently, there are five million electric vehicles on the world’s roads. China dominates the global electric vehicles market, followed by Europe and the United States. Technological advancements have paved the way for substantial price cuts in battery prices, key stimulators being research and development in battery chemistry and burgeoning battery production for electric vehicles. The fall in battery prices is attributed to increased economies of scale generated by the EV market. Unfortunately, the novel coronavirus outbreak, commonly known as COVID-19, has crippled the entire world. With the number of cases rising exponentially every day, the international community is finding it exceedingly difficult to seek treatment for the infected patients. The rate of infections is asymmetrically distributed. While countries such as Singapore are witnessing a resurgence, Western Europe has reached a plateau, thus debating whether they should reopen their economies or not.
在过去的几年里,电动汽车的范围和市场吸引力一直在飙升。这是对日益增长的环境可持续性和减少碳足迹的呼吁的回应。目前,全球道路上有500万辆电动汽车。中国在全球电动汽车市场占据主导地位,其次是欧洲和美国。技术进步为电池价格的大幅下降铺平了道路,关键的刺激因素是电池化学的研究和开发以及电动汽车电池生产的蓬勃发展。电池价格下降的原因是电动汽车市场产生的规模经济增长。不幸的是,通常被称为COVID-19的新型冠状病毒爆发使整个世界陷入瘫痪。随着病例数量每天呈指数级增长,国际社会发现为受感染患者寻求治疗极其困难。感染率是不对称分布的。在新加坡等国家见证经济复苏的同时,西欧已经达到了一个平台期,因此他们正在争论是否应该重新开放经济。
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引用次数: 0
Predictive Model Based Low-Speed Adaptive Cruise Control for Autonomous Vehicles 基于预测模型的自动驾驶汽车低速自适应巡航控制
Pub Date : 2020-01-01 DOI: 10.35248/2167-7670.2020.9.194
O. Alankuş, Elif Toy Aziziaghdam, Kaan Cakin
European Union confirmed the “Vision Zero” objective in June 2019, as to achieve zero deaths and serious injuries by 2050. This can only be attained through connected and autonomous vehicles integrated into intelligent transport systems and a sustainable mobility system. This requires a cost-effective, fast,and efficient development process for advanced connected and autonomous vehicle functions. In this article, a methodology to develop low-speed Adaptive Cruise Control (ACC), which is one of the most important functions of an autonomous vehicle, is explained. Vehicle tracking at slow speeds is a problem especially for conventional vehicles with high levels of nonlinearities in the powertrain system. As a part of a university-industry collaboration project “SAE level 3 autonomous bus development”, a flexible and realistic discrete plant model including longitudinal vehicle and powertrain model has been developed and discrete low-speed ACC is designed. The plant model aims to perform detailed and realistic software tests of autonomous features, which interfaces with the vehicle controllers. OKAN_UTAS autocorrectedmulti-parameter longitudinal model is integrated. For engine modeling via shaft dynamometer the 3D map of the engine is reproduced. The transmission characteristics were prepared through the road tests. To increase the reliability of the developed functions, Software in the Loop (SIL) and Model in the Loop (MIL) simulations were conducted before the on-road vehicle tests. Finally, C code with the MISRA C standard of ACC is generated and embedded into a real-time platform. The plant model, ACC design, and Model in the Loop test results are presented.
欧盟于2019年6月确认了“零愿景”目标,即到2050年实现零死亡和零重伤。这只能通过连接和自动驾驶车辆集成到智能交通系统和可持续移动系统中来实现。这需要一个经济、快速、高效的开发过程,以实现先进的联网和自动驾驶汽车功能。本文介绍了自动驾驶汽车最重要的功能之一——低速自适应巡航控制(ACC)的开发方法。车辆在低速下的跟踪是一个问题,特别是对于动力系统高度非线性的传统车辆。作为“SAE 3级自动驾驶客车开发”校企合作项目的一部分,开发了一种灵活、现实的离散工厂模型,包括纵向车辆模型和动力系统模型,并设计了离散低速ACC。工厂模型旨在对自动驾驶功能进行详细和现实的软件测试,这些功能与车辆控制器接口。整合OKAN_UTAS自校正多参数纵向模型。发动机建模通过轴测功机的三维地图的发动机是再现。通过道路试验制备了传动特性。为了提高所开发功能的可靠性,在道路车辆试验之前进行了环中软件(SIL)和环中模型(MIL)仿真。最后,根据ACC的MISRA C标准生成C代码,并将其嵌入到实时平台中。介绍了工厂模型、ACC设计和模型在环试验结果。
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引用次数: 0
3D FE model for the acoustic analysis of an automotive muffler with glass wool 玻璃棉消声器声学分析的三维有限元模型
Pub Date : 2018-10-08 DOI: 10.4172/2167-7670-c1-012
pVirginia Silva Araujo Monteiro, Ivan Menezesp
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引用次数: 0
A possible collision safer device for automobile vehicles 一种可能的汽车碰撞安全装置
Pub Date : 2018-10-08 DOI: 10.4172/2167-7670-C1-010
H. Pan
A new collision safer device is proposed to divert the collision force in the automobile collisions and partially convert the harmful force into non-harmful force, therefore, it will substantially reduce the harmful impact force on the people and on the vehicles during the collisions, lives can be saved and property damage can be reduced. The proposed collision safer device has one free rotation wheel installed horizontally at the vehicle lower front left and right corners, respectively. The wheels will be the first contact of the vehicle in non-perpendicular forward collisions, the collision force component parallel to the collision surface will cause the wheel rotating and make the vehicle rolling slide along the direction of the parallel force component, therefore, the collision will be softer and less harmful, so lives could be saved and property damage could be reduced. The collision test with mini 3D printed models shows that the collision safer device will significantly extend the moving distance after the vehicle collides into a roadside crash barrier in the relatively small collision angle and give the vehicles behind more time and distance to slow down, so the severity of the rear-end collision will be reduced, lives will be saved, even the collision can be avoided. This collision safer device is simple, low cost and can be added to the current design of all types of common vehicles without major modification of the structures.
提出了一种新的碰撞安全装置,将汽车碰撞中的碰撞力进行分流,将部分有害力转化为非有害力,从而大大减少碰撞过程中对人和车辆的有害冲击力,挽救生命,减少财产损失。所提出的碰撞安全装置有一个自由旋转的轮子,分别水平安装在车辆的下前、左、右拐角处。在非垂直向前碰撞中,车轮将是车辆的第一个接触点,与碰撞面平行的碰撞力分量将引起车轮的旋转,使车辆沿平行力分量的方向滚动滑动,从而使碰撞更柔和,危害更小,从而可以挽救生命,减少财产损失。通过迷你3D打印模型的碰撞试验表明,碰撞安全装置在车辆以相对较小的碰撞角度撞上路边防撞护栏后,会显著延长行驶距离,给后面的车辆更多的减速时间和距离,从而降低追尾事故的严重程度,挽救生命,甚至避免碰撞。这种碰撞安全装置简单,成本低,可以添加到所有类型的普通车辆的现有设计中,而无需对结构进行重大修改。
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引用次数: 0
Experimental Investigation of Performance and Emission Characteristics of Diesel-Bio Diesel (CSOME) with Nano Additive Blends in CI Engine 纳米添加剂混合柴油-生物柴油(CSOME)在CI发动机上的性能和排放特性试验研究
Pub Date : 2018-01-01 DOI: 10.4172/2167-7670.1000176
S. Deepankumar, R. Gobinath, S. Balachandran, M. Boopathi
Increasingly stringent emissions regulations and environmental concerns have caused interest in the development of alternative fuels for internal combustion engines. Recently biobutanol, bioethanol and biodiesel emerged as an alternative fuel due to their oxygenated nature. This paper investigates the physical stability of ethanol-diesel blends using Cottonseed oil methyl esters diesel emulsifier as additives, subsequently analysis of physio-chemical properties. Furthermore, experimental tests were carried out to study the performance (fuel consumption, thermal efficiency, power, exhaust gas temperature) and emissions (CO, NOx, HC and Smoke) of Direct Injection (DI) engine fuelled with the various blends compared with those fuelled by diesel. The blends used for this study were D50B50, D60B30E10, D60B20E15DEE5 And D40B40E10DEE10.
日益严格的排放法规和环境问题引起了人们对内燃机替代燃料开发的兴趣。近年来,生物丁醇、生物乙醇和生物柴油因其含氧特性而成为替代燃料。本文以棉籽油甲酯柴油乳化剂为添加剂,考察了乙醇-柴油共混物的物理稳定性,并对其理化性质进行了分析。此外,还进行了实验测试,研究了使用各种混合燃料的直喷发动机与柴油发动机的性能(油耗、热效率、功率、排气温度)和排放(CO、NOx、HC和Smoke)。本研究使用的共混物为D50B50、D60B30E10、D60B20E15DEE5和D40B40E10DEE10。
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引用次数: 3
Development of a Mechatronic Control System for a Mechanical Fuel Injection System of a Four Cylinder Automotive Diesel Engine 四缸车用柴油机机械式燃油喷射系统机电控制系统的研制
Pub Date : 2018-01-01 DOI: 10.4172/2167-7670.1000177
M. Kortam
The aim of this paper is developing a mechatronic control system to replace mechanical fuel injection system of a four-cylinder automotive diesel engine, to study what are the important electronics fuel injection parameters which have the highest effect on the engine performance. All the paper work performed on Isuzu engine 4HF1 which is 4 cylinder diesel engine working with fully mechanical fuel injection system. To develop mechatronics fuel system, must install crank sensor which measure the engine speed in rpm and specify the piston position, cam sensor which specifies the injection order, common rail fuel injection system which includes electronic injectors, high pressure pump and common rail, ECU which control all the system inputs and outputs, and injectors driver controller which responsible for delivering the required high voltage for the injectors with high speed switching. ECU software will be developed from scratch to develop injection quantity, injection time and injection order output signals to be compatible with the common rail fuel system. Mathworks tools (Matlab-Simulink-Stateflow) will be used for developing ECU software application layer which divided into many models as crank shaft speed model, crankshaft sensor piston position, cam sensor injection order model,pedal speed model, injectors model, torque model and final model which collect all the previous models. Embedded coder toolbox will be used for generating C code which will be integrated with the microcontroller layer and uploaded to the selected ECU.
本文的目的是开发一种机电控制系统,以取代四缸汽车柴油机的机械燃油喷射系统,研究哪些重要的电子燃油喷射参数对发动机的性能影响最大。所有的文书工作都是在五十铃发动机4HF1上进行的,这是一款4缸柴油发动机,采用全机械燃油喷射系统。为了开发机电一体化燃油系统,必须安装曲柄传感器,以rpm为单位测量发动机转速并指定活塞位置,凸轮传感器指定喷射顺序,共轨燃油喷射系统,包括电子喷油器,高压泵和共轨,控制所有系统输入和输出的ECU,以及喷油器驱动器控制器,负责为高速开关喷油器提供所需的高压。ECU软件将从零开始开发,以开发与共轨燃油系统兼容的喷射量、喷射时间和喷射顺序输出信号。使用Mathworks工具(Matlab-Simulink-Stateflow)开发ECU软件应用层,该层分为曲轴转速模型、曲轴传感器活塞位置模型、凸轮传感器喷油顺序模型、踏板转速模型、喷油器模型、扭矩模型和最终模型。嵌入式编码器工具箱将用于生成C代码,这些代码将与微控制器层集成并上传到所选的ECU。
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引用次数: 2
Design of Energy-Absorbed Structures and Materials with Graded Configurations in the Automotive Body 汽车车身梯度构型吸能结构与材料设计
Pub Date : 2018-01-01 DOI: 10.4172/2167-7670.1000178
Fengxiang Xu, Suo Zhang, Kunying Wu
In the past years, there has been an unremitting pursuit of lighter and safer energy-absorbing structural elements in the automotive body structure for better fuel economy, less gas emission and passenger safety. Recently, crashworthiness of advanced structures and materials with graded effects raised enormous concerns [1-3]. Graded structures/ materials could considerably reduce weight and improve performance by making reasonable designs of the gradient parameters.
多年来,为了更好的燃油经济性、更少的气体排放和乘客的安全,汽车车身结构一直在不懈地追求更轻、更安全的吸能结构元件。近年来,具有梯度效应的先进结构和材料的耐撞性引起了人们的极大关注[1-3]。通过合理设计梯度参数,梯度结构/材料可以显著减轻重量,提高性能。
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引用次数: 0
Application of Grey Neural Network in Vehicle Vibration Prediction 灰色神经网络在汽车振动预测中的应用
Pub Date : 2018-01-01 DOI: 10.4172/2167-7670.1000180
Zhendong Zhao, R. Yin
Considering the theoretical characteristics of grey system method and neural network, a grey neural network prediction method was proposed by combining the grey prediction model and the neural network in order to improve the accuracy of vehicle vibration prediction. On the purpose of verifying the proposed model, the vibration data of several measuring points under different traveling speed of a pick-up truck were both tested in an experimental way and predicted in a theoretical way. The results show that it is feasible to apply the proposed grey neural network prediction method to calculate the vehicle vibration data, which improves the prediction accuracy effectively.
针对灰色系统方法和神经网络的理论特点,提出了一种将灰色预测模型与神经网络相结合的灰色神经网络预测方法,以提高车辆振动预测的精度。为了验证所提出的模型,对皮卡在不同行驶速度下的几个测点的振动数据进行了实验测试和理论预测。结果表明,将所提出的灰色神经网络预测方法应用于车辆振动数据计算是可行的,有效地提高了预测精度。
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引用次数: 0
Analysis of Safety Compliance and Accident Impacts on Lost time Performance of Small Scale Automotive Maintenance Workshops in Calabar, Nigeria 尼日利亚Calabar小型汽车维修车间安全符合性及事故对损失时间绩效的影响分析
Pub Date : 2018-01-01 DOI: 10.4172/2167-7670.1000186
Inah Oi, Nwankwojike Bn
The objective of the present research is twofold; first to assess the level of safety compliance practices among artisans and secondly, to measure the impacts of unplanned lost time emanating from accident on time performance of small-scale auto maintenance firms. Ninety different auto-maintenance jobs executed by automobile, heavy duty, generator and panel beater auto firms between, Januarys to December, 2016 were analyzed using direct observation. Furthermore, primary data collected were analyzed using MS Excel 2013 and Minitab 17 software. Results revealed the mean performance rating of workshops on the availability and usage of personal protective equipment as 143.9 and 154.7. While 224.2 and 302.7 constitutes respective poor usage rate and non-availability of personal protective equipment in the respective workshops. Results further revealed 58.2% as average productive lost time rate resulting from accident occurrence. Conversely, regression analysis revealed that a unit increase of 659.2, 63.5 and 82.8 in accident, severity and lost time index, caused a decreased of -150.8 in overall productivity lost factor. With a coefficient of determination (R2 ) of 72.01% at p-value less than 0.005. Hence, a positive and significant relationship between accident and auto mechanics time performance exist. Therefore, sensitization of stakeholders in this sector on the usage of personal protective equipment and the need to make safety their priority as well as regular inspection for safety compliance by regulatory bodies are recommended to build customers trust and improve productivity in this sector
本研究的目的是双重的;首先,评估工匠的安全合规实践水平;其次,衡量意外事故造成的意外损失时间对小型汽车维修公司时间绩效的影响。采用直接观察的方法,对2016年1月至12月期间汽车、重型、发电机和面板加热器汽车公司执行的90种不同的汽车维修工作进行了分析。使用MS Excel 2013和Minitab 17软件对收集到的原始数据进行分析。结果显示,各车间在个人防护用品可得性和使用方面的平均绩效评分分别为143.9分和154.7分。而224.2和302.7则分别构成了各自车间个人防护装备使用率低和无法获得的情况。事故造成的平均生产损失时间率为58.2%。相反,回归分析表明,事故、严重程度和损失时间指数分别增加659.2、63.5和82.8个单位,导致整体生产力损失因子下降-150.8个单位。在p值< 0.005时,决定系数(R2)为72.01%。因此,事故与汽车修理工时间绩效之间存在显著的正相关关系。因此,建议提高该行业利益相关者对个人防护装备使用的敏感性,并将安全作为优先事项,以及监管机构定期检查安全合规性,以建立客户信任并提高该行业的生产力
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引用次数: 1
Applications of a New Method for the Engineering of Endless Fiber Reinforced Body in White Components 一种新方法在白色构件无极纤维增强体工程中的应用
Pub Date : 2018-01-01 DOI: 10.4172/2167-7670.1000179
Fang Xf, M. Grote
For development of efficient and economic car bodies, high performance lightweight materials such as endless fiber reinforced plastics (FRP) have gained importance. However, the systematic engineering and design with composite materials and hybrid combinations of FRP and metallic materials are extremely challenging. Therefore, the whole design process has to be supported with new methods, which should be applied in the early stage of body design to avoid wrong decisions.
为了开发高效经济的汽车车身,高性能轻质材料如无尽纤维增强塑料(FRP)变得越来越重要。然而,复合材料和玻璃钢与金属材料混合组合的系统工程和设计是极具挑战性的。因此,在整个设计过程中必须有新的方法来支持,这些方法应该在车身设计的早期应用,以避免错误的决策。
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引用次数: 0
期刊
Advances in Automobile Engineering
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