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An Oxygen Balance Method: Fuel Consumption Measurement for Fuel Cell Vehicles based on Exhaust Emissions with No Vehicle Modification 一种氧平衡法:基于无改装尾气排放的燃料电池汽车油耗测量
Pub Date : 2016-10-11 DOI: 10.4172/2167-7670.1000152
E. Kuroda, Masaru Yano, M. Akai, M. Sasaki
For the measurement of fuel consumption of fuel cell vehicles (FCV), ISO 23828 and SAE J2572 standards recommend three methods, the gravimetric, pressure and flow methods. These methods can measure with a high accuracy and have proven its practicability in the fuel economy test, but require the test vehicle to be modified to supply hydrogen from an external, rather than the on-board fuel tank. As these vehicle modifications necessitate technical assistance of the vehicle manufacturer, a simpler no-modification method such as the carbon balance method for gasoline- and diesel-fuelled vehicles is desired. Therefore, the authors have developed new method using only FCV exhaust emissions. This paper describes the principles behind the new method as well as test equipment and results, influence factors in error and issues. As a result, its real-time fuel consumption measurement characteristics were improved by reducing the volume of the gas sampling system and by correcting the time lag in oxygen concentration analysis. Error of the new method was from -3% to +1% as compared with the flow method for the fuel cell system operating in JC08 test cycle.
对于燃料电池汽车(FCV)的油耗测量,ISO 23828和SAE J2572标准推荐了三种方法,即重量法、压力法和流量法。这些方法测量精度高,并在燃油经济性试验中证明了其实用性,但需要对试验车辆进行改造,使其从外部而不是车载燃料箱中提供氢气。由于这些车辆改装需要车辆制造商的技术协助,因此需要一种更简单的无改装方法,例如汽油和柴油燃料车辆的碳平衡方法。因此,作者开发了仅使用燃料电池汽车尾气排放的新方法。本文介绍了新方法的原理、测试设备和结果、影响误差的因素和存在的问题。通过减小气体采样系统的体积和修正氧浓度分析中的滞后时间,改善了其实时油耗测量特性。与JC08试验循环中运行的燃料电池系统的流量法相比,新方法的误差在-3% ~ +1%之间。
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引用次数: 2
Carbon-Monoxide (CO): A Poisonous Gas Emitted from Automobiles, Its Effect on Human Health 一氧化碳(CO):汽车排放的有毒气体及其对人体健康的影响
Pub Date : 2016-10-05 DOI: 10.4172/2167-7670.1000151
Ohwojero Chamberlain
The emission of carbon monoxide CO from automobiles has caused hazard to human health. Human beings are faced with health challenges as they breathe air in their living environment. The breathing in of carbon monoxide has caused reduction of oxygen in take by man; because when carbon monoxide is breathed into the lungs, it sticks to the haemoglobin thereby preventing oxygen flow. This affects the transportation of oxygen by the blood which causes suffocation in man. The cluster of automobiles on roads and streets globally has posed health challenge. Hence this research is focused on finding solution to the effect of carbon monoxide CO on human health. To carry out this study the researcher used two automobiles that have different type of exhaust system. The researcher exposed four English rabbits to the two different exhaust systems in different rooms together with white fabrics in each of the rooms for one week to check for level of carbon deposits on the white fabrics after one week of the experiment. Observations were made in respect to body temperature, weight, nasal discharge, vomiting rate and feeding habits of the four rabbits used in the experiment. Findings were discussed based on observations as shown on records and recommendations were made to guide the researcher in making conclusion.
汽车排放的一氧化碳对人体健康造成了危害。人类在生活环境中呼吸空气,面临健康挑战。一氧化碳的吸入导致人体摄氧量的减少;因为当一氧化碳被吸入肺部时,它会附着在血红蛋白上,从而阻止氧气的流动。这会影响血液中氧气的运输,从而导致人体窒息。全球道路和街道上的汽车集群对健康构成了挑战。因此,本研究的重点是寻找一氧化碳对人体健康影响的解决方案。为了进行这项研究,研究人员使用了两辆具有不同类型排气系统的汽车。研究人员将四只英国兔子放在不同房间的两种不同的排气系统中,每个房间都有白色织物,为期一周,以检查实验一周后白色织物上的碳沉积水平。观察4只实验兔的体温、体重、鼻分泌物、呕吐率和摄食习惯。研究结果是根据记录中显示的观察结果进行讨论的,并提出了指导研究人员得出结论的建议。
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引用次数: 6
Improvement of Full-Load Performance of an Automotive Engine Using Adaptive Valve Lift and Timing Mechanism 利用自适应气门升程和正时机构改善汽车发动机的全负荷性能
Pub Date : 2016-09-30 DOI: 10.4172/2167-7670.1000150
T. Isk, A. Mohamad, A. Rasid
This paper describes an improvement of full-load performance of an internal combustion engine using Adaptive Valve Lift And Timing Mechanism (AVLT). AVLT enables engine power improvement by increasing valve timing and lift at high engine speed and load operating regions. It utilizes engine fluids pressure difference with respect to engine speed to actuate the AVLT mechanism which will make the valve lift higher and longer duration at higher engine speed and loads. Since engine speed and load can be linearly correlated to these pressures, a mechanical sliding arm valve actuation mechanism is constructed based on their transient behavior. Therefore, a continuously dynamic valve lift profile with respect to engine speed can be achieved to increase brake power of the engine. Dynamics analysis performed using MSC Adam software showed that tappet translation increased by 32% from 9.09 mm to 12.01 mm by varying translational skate position between 0o and 10o. The results from this simulation are then set as intake valve profile in Lotus Engineering software simulation. With AVLT, brake power at speed between 5000 and 6500 rpm increased between 2% to 7%. Maximum torque improvement was realized at 7000 rpm while BSFC was reduced by up to 2% at 7000 rpm. The increased in brake power and torque are direct results from volumetric efficiency linear improvement between 1.5 and 6% at speed range of 5000 to 7000 rpm.
本文介绍了采用自适应气门升程与正时机构(AVLT)改善内燃机满载性能的方法。AVLT通过增加气门正时和在高发动机转速和负载工作区域的升力来提高发动机功率。它利用发动机流体相对于发动机转速的压力差来驱动AVLT机构,这将使气门升程更高,在更高的发动机转速和负载下持续时间更长。由于发动机转速和负载与这些压力呈线性相关,因此基于它们的瞬态行为构建了机械滑臂气门驱动机构。因此,可以实现相对于发动机转速的连续动态气门升程曲线,以增加发动机的制动功率。使用MSC Adam软件进行的动力学分析表明,通过在100和100之间改变滑动滑块位置,挺杆平移量从9.09 mm增加到12.01 mm,增加了32%。然后将仿真结果设置为Lotus Engineering软件仿真中的进气门廓形。采用AVLT后,转速在5000至6500 rpm之间时的制动功率提高了2%至7%。在7000 rpm时实现了最大扭矩提升,而在7000 rpm时BSFC降低了2%。在5000至7000转/分的转速范围内,容积效率线性提高了1.5%至6%,直接导致了制动功率和扭矩的增加。
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引用次数: 3
Engineering Design at Concept Stage for a Front Axle Design â A CaseStudy 前桥设计概念阶段的工程设计ÃⅱÂÂ一个案例研究
Pub Date : 2016-08-09 DOI: 10.4172/2167-7670.1000157
M. SubrataKumar, A. Maity, A. Prasad, S. Karmakar, P. Maji
Now-a-days, in an industrial growth, cost and quality production in time as well as quality improvement are of major interest in engineering design. Therefore, in order to make a decision as early as possible and according to the product specifications, mechanical analysis is used more and more, and earlier and earlier in the engineering process. Then, a multitude of mechanical models are elaborated during engineering design, and management difficulties appear with engineering changes or evolution of specifications. Moreover, when the designer is faced with design or modelling options, previous analysis could answer the choice of options for decision making. Then, the reuse of a previous analysis must be envisaged. The paper presented the aim and the different use of mechanical analysis in engineering design. Afterwards, different levels of models handled by the designer during the engineering process are proposed. The present case study will show the utilization of engineering design through 3D CAD at the concept design stage of a highly complicated shaped product for a new system.
在工业发展的今天,成本和质量的及时生产以及质量的改进是工程设计的主要关注点。因此,为了尽早根据产品规格做出决策,力学分析在工程过程中的应用越来越多,也越来越早。然后,在工程设计过程中需要阐述大量的力学模型,并且随着工程的变化或规范的演变出现管理困难。此外,当设计师面临设计或建模选项时,先前的分析可以回答决策的选项选择。然后,必须设想先前分析的重用。本文介绍了力学分析的目的及其在工程设计中的不同用途。然后,提出了设计人员在工程过程中处理的不同层次的模型。本案例研究将展示在一个高度复杂形状产品的新系统的概念设计阶段,通过3D CAD应用工程设计。
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引用次数: 0
Optimization of Fuel Inlet Port Geometry of an Air Assisted Diesel Injector 空气辅助柴油机喷油器进油口几何形状的优化
Pub Date : 2016-08-09 DOI: 10.4172/2167-7670.1000158
G. Tüccar, Erinç Uludamar, Kadir Aydın
Diesel fuel is injected into the combustion chamber by the use of injectors. Atomization process is characterized by directing extremely pressurized fuel into the injector orifices in modern injectors. However, this high pressure level, which exceed 1300 bars in some cases, causes cavitation before discharge nozzle and results in mechanical wear. In air assisted atomizers, pressured air is utilized for atomization. This type of injectors eliminates cavitation erosion by reducing injection pressure and they create finer spray geometry. Mixing process of air and fuel has a vital importance since it directly affects level of atomization in air assisted atomizers. Therefore the aim of this study was determine influence of different inlet port geometries on flow characteristics of a specially designed diesel injector which is developed for diesel fuel atomization, by using computational fluid dynamics techniques.
柴油通过喷油器注入燃烧室。在现代喷油器中,雾化过程的特点是将极压的燃料导入喷油器孔中。然而,这种高压水平,在某些情况下超过1300巴,会导致排气喷嘴前的空化,导致机械磨损。在空气辅助雾化器中,压力空气被用于雾化。这种类型的喷射器通过降低喷射压力来消除空化侵蚀,并产生更精细的喷射几何形状。空气与燃料的混合过程直接影响到空气辅助雾化器的雾化水平,因而具有至关重要的意义。因此,本文采用计算流体动力学技术,研究了不同进气道几何形状对柴油机雾化喷油器流动特性的影响。
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引用次数: 0
Hybrid Energy Source Management Composed of a Fuel Cell and Super-Capacitor for an Electric Vehicle 一种由燃料电池和超级电容器组成的电动汽车混合能源管理
Pub Date : 2016-08-08 DOI: 10.4172/2167-7670.1000156
B. Allaoua, B. Mébarki
Managing the power flow from a dedicated energy source to power the wheels of a motor propulsion system is important to ensure proper operation the displacement of an Electric Vehicle (EV). Is used for our energy source a hybrid system consisting of a Fuel Cell Proton Exchange Membrane (FCPEM) associated with a super-capacitor battery for high power applications connected through DC-DC converters associated with these sources. After a presentation of the architecture of hybrid energy source for our EV, two parallel-type configurations are explored in more detail. For each of them, from a control strategy for effective management of energy flows, validated simulation shows the performance obtained for the traction. The management of hybrid energy source in our VE is based primarily on the intervention of the super-capacitor battery in fugitives schemes such as slopes, speeding and rapid acceleration. Secondly, the steady state of the fuel cell intervenes only to ensure the propulsion system power in permanent regime. Finally, a case study considering energy management for an electric vehicle are presented, illustrating the benefits of hybrid energy sources in terms of EV range. The models can be applied to other vehicles and driving regimes.
管理来自专用能源的功率流,为电机推进系统的车轮提供动力,对于确保电动汽车(EV)的正常运行至关重要。我们的能源是一个混合系统,由燃料电池质子交换膜(FCPEM)和超级电容电池组成,用于高功率应用,通过与这些能源相关的DC-DC转换器连接。在介绍了电动汽车混合能源的结构之后,对两种并联型配置进行了更详细的探讨。对于每一种牵引系统,从有效管理能量流的控制策略出发,通过仿真验证了牵引系统的性能。在我们的VE中,混合能源的管理主要基于超级电容电池在斜坡、超速和快速加速等逃逸方案中的干预。其次,燃料电池的稳态干预只是为了保证推进系统功率处于永久状态。最后,给出了一个考虑电动汽车能量管理的案例研究,说明了混合能源在电动汽车续航里程方面的优势。这些模型可以应用于其他车辆和驾驶制度。
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引用次数: 3
Electrochemical model based fault diagnosis of lithium ion battery 基于电化学模型的锂离子电池故障诊断
Pub Date : 2016-08-07 DOI: 10.4172/2167-7670.1000159
A. F. M. Moshiur Rahman
A Multiple Model Adaptive Estimation (MMAE) based approach of fault diagnosis for Li-Ion battery is illustrated in this paper. Electrochemical modelling approach is integrated with MMAE for fault diagnosis. This real physics based model of Li-ion battery (with Li-Co-O2 cathode chemistry) with nominal model parameters is considered as the healthy battery model. Battery fault conditions such as aging, overcharge and over discharge causes significant variations of parameters from nominal values and can be considered as separate models. Output error injection based Partial Differential Algebraic Equation (PDAE) observers are used to generate the residual voltage signals. These residuals are then used in MMAE algorithm to detect the ongoing fault conditions of the battery. Simulation results show that the fault conditions can be detected and identified accurately which indicates the effectiveness of the proposed battery fault detection method.
提出了一种基于多模型自适应估计(MMAE)的锂离子电池故障诊断方法。将电化学建模方法与MMAE相结合进行故障诊断。这种基于真实物理的锂离子电池模型(具有锂钴氧阴极化学)具有标称的模型参数,被认为是健康的电池模型。电池老化、过充和过放电等故障情况会导致参数与标称值发生显著变化,可以作为单独的模型考虑。基于输出误差注入的偏微分代数方程(PDAE)观测器用于产生剩余电压信号。然后将这些残差用于MMAE算法来检测电池的持续故障状态。仿真结果表明,该方法能够准确地检测和识别故障条件,验证了该方法的有效性。
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引用次数: 3
Performance and Emissions Characteristics of Variable Compression Ignition Engine 可变压缩点火发动机的性能与排放特性
Pub Date : 2016-07-08 DOI: 10.4172/2167-7670.1000146
K. Rt, S. Rao
Variable Compression Ratio engine test rig is used to determine the effect of compression Ratio on the performance and emissions of the engine. The objective is to determine the optimum compression ratio for the better performance and lowering the emissions. In order to determine the optimum compression ratio, experiments were carried out on a single cylinder four stroke variable compression ratios of 16.5, 17.0, 17.5, 18.0 and 19.0 in a Diesel engine. The performance characteristics of the engine namely break power, brake thermal efficiency, brake specific fuel consumption and other parameters are studied and also conducted the emissions test namely Carbon monoxide, carbon dioxide, hydrocarbons, Nitrogen oxides and other emissions at various conditions. It is observed that a significant improvement in the performances and lowered the various emissions also at a compression ratio of 17.0 compared to other compression ratios due to the enhancement of the overall combustion process.
可变压缩比发动机试验台用于测定压缩比对发动机性能和排放的影响。目标是确定最佳的压缩比,以获得更好的性能和降低排放。为了确定最佳压缩比,在一台柴油机上进行了单缸四冲程可变压缩比16.5、17.0、17.5、18.0和19.0的实验。研究了发动机的性能特性,即制动功率、制动热效率、制动比油耗等参数,并进行了各种工况下的排放试验,即一氧化碳、二氧化碳、碳氢化合物、氮氧化物等排放。可以观察到,由于整体燃烧过程的增强,在压缩比为17.0时,与其他压缩比相比,性能有了显著改善,各种排放也有所降低。
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引用次数: 10
Control of Carbon Dioxide and other Emissions from Diesel Operated Engines using Activated Charcoal 使用活性炭控制柴油发动机的二氧化碳和其他排放物
Pub Date : 2016-07-04 DOI: 10.4172/2167-7670.1000149
S. Sameer, P. Vijayabalan, Rajadurai Ms
Carbon dioxide is a major cause of natural calamities and changes in climatic conditions. Of all the sources of emission, the amount of carbon dioxide from automobiles is approximately 65%, which is more than any other sources of emissions. Raise in carbon dioxide content in atmosphere is causing global warming which is evolved from greenhouse gases. To reduce the emission and control of carbon dioxide percentage in atmosphere form automobiles, theoretical and practical methods of adsorption of carbon dioxide using activated charcoal (carbon) in diesel operated engines is conducted. Charcoal is one of the best adsorption material due to its high pours valve and capture capacity, when reacted with other reagents in order of activation, it increases its adsorption capacity than that of regular charcoal. In this project the activation of charcoal is steam activation. The amount of carbon dioxide exhausted from diesel engine in ideal condition and after the reactor chamber is added to the exhaust system the content of carbon dioxide is controlled up to 9.266%.
二氧化碳是自然灾害和气候变化的主要原因。在所有的排放源中,汽车排放的二氧化碳约占65%,这比任何其他排放源都要多。大气中二氧化碳含量的增加导致了由温室气体演变而来的全球变暖。为了减少汽车排放和控制大气中二氧化碳的比例,在柴油发动机上进行了活性炭吸附二氧化碳的理论和实践方法。活性炭具有较高的倾倒阀和捕集能力,是较好的吸附材料之一,当与其他试剂按活化顺序反应时,其吸附能力比普通木炭有所提高。在这个项目中,木炭的活化是蒸汽活化。柴油机在理想工况下的二氧化碳排放量,在排气系统中加入反应器室后,二氧化碳含量控制在9.266%。
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引用次数: 8
Navigating a Driverless World 驾驭无人驾驶世界
Pub Date : 2016-07-04 DOI: 10.4172/2167-7670.1000147
K. K
In the recent years there has been a tremendous advancement in the autonomous sector resulting in development of autonomous car or driverless cars. The research paper focuses on features of this car and on its practical implementation in developing countries. The points taken into account include issues for its implementation in developing countries as they differ from that of developed countries. The paper includes security features of the car, the problems faced due to the geographical conditions among various areas as well as cultural background (social issues), high speed internet connectivity, fully mapped global terrain, ability to fetch real time traffic data through internet, non-availability of standardized road network and weather interference are the key issues that will be reviewed and their solutions suggested in this paper.
近年来,自动驾驶领域取得了巨大的进步,导致了自动驾驶汽车或无人驾驶汽车的发展。研究论文的重点是这款车的特点和它在发展中国家的实际实施。考虑到的要点包括在发展中国家执行《公约》的问题,因为它们不同于发达国家的问题。本文包括汽车的安全特性,由于各个地区之间的地理条件以及文化背景(社会问题)所面临的问题,高速互联网连接,完全映射的全球地形,通过互联网获取实时交通数据的能力,标准化道路网络的不可用性和天气干扰是将被审查的关键问题,并在本文中提出解决方案。
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引用次数: 0
期刊
Advances in Automobile Engineering
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