KIVA燃油喷雾多维模型的研究

KIVA程序是一功能比较齐全的内燃机缸内过程模拟数值计算的大型程序，它代表了目前多维模型的最新进展。本文论述了KIVA程序中喷雾模型的发展历程和进展，最后指出了燃油喷雾多维模型研究的发展趋向。     

金属蜂窝载在汽车工程中的应用(上)

一.概述 　　近几十年来,汽车工程师一直致力于降低汽车排放技术的研究开发,并不断有诸如电动车、混合动力车及燃料电池车等低排放(LEV)或零排放(ZEV)车辆技术推陈出新.事实上,现今机动车辆的动力载体仍以汽油或柴油内燃机为绝对主体,只有降低内燃机汽车的排放才能真正缓解和逐步解决现行汽车排放污染的问题.降低汽车排放污染的课题主要分为如下三个分支,即内燃机燃烧技术(机内净化)、燃油品质及废气处理(机外控制).……     

浅析国内电动汽车产业发展现状

本文阐述了国内电动汽车发展历程、技术现状以及发展所面临的挑战,并指出从发展路线看,纯电动汽车和插电式混合动力汽车产业化虽是当前重点工作,但同时还应普及非插电式混合动力汽车、节能内燃机汽车,以提升我国汽车产业整体技术水平。     

一位汽修老前辈的修车心得

内燃机的构造与发展 内燃机是汽车的“动力心脏”，100多年来它的技术是日新月异的。内燃机的发展又因燃油品质的提高而改进，上个世纪由于汽油是70号（辛烷值），汽油发动机的压缩比为6：1，如今汽油品质已经提高到97号和98号，     

金属蜂窝载体在汽车工程中的应用(上)

一.概述 近几十年来,汽车工程师一直致力于降低汽车排放技术的研究开发,并不断有诸如电动车、混合动力车及燃料电池车等低排放(LEV)或零排放(ZEV)车辆技术推陈出新。事实上,现今机动车辆的动力载体仍以汽油或柴油内燃机为绝对主体,只有降低内燃机汽车的排放才能真正缓解和逐步解决现行汽车排放污染的问题。降低汽车排放污染的课题主要分为如下三个分支,即内燃机燃烧技术(机内净化)、燃油品质及废气处理(机外控制)。 采用催化转化器是净化汽车尾气的重要手段之一,     

且看涡轮增压如何拯救内燃机的未来

正假如未来纯燃油汽车真的禁售,那么在混合动力汽车中,内燃机仍将长期存在。本刊记者采访了博格华纳涡轮增压系统中国区及泰国区副总裁兼总经理倪广山,就博格华纳在涡轮增压这一领域目前关注和研发的创新产品和先进技术给读者带来解读。新能源汽车的发展已是大势所趋,尤其是2017年以来,多个国家相继传出燃油汽车禁售时间表,似乎在宣告传统内燃机汽车很快就将走向消亡。大多数业内人士的看法是:假如未来纯燃油汽车真的禁售,那么在混合动力汽车中,内燃机仍将长期存     

高增压汽油机动力总成系统的整体优化

目前，降低燃油耗乃至达到法规所规定的二氧化碳排放限值是动力总成创新的主要推动力，这促使研发人员需根据不同的汽车市场和发动机等级采用不同的解决方案。除了在极度小型化的情况下，采取一些机内措施以获得可靠的燃烧过程之外，还讨论了选择哪种变速箱方案及不同的混合动力结构型式。Bosch公司为汽油机动力总成系统在沟通内燃机、变速箱...     

DPF尾气处理原理解析及保养方法

<正>随着汽车工业的发展和汽车保有量的持续增加,汽车给我们日常生产和生活带来了极大的便利。对于使用内燃机作为动力源的车辆,在内燃机工作过程中,燃油燃烧会留下有害的残留物（例如炭烟微粒等）。为此,欧洲甚至全球均颁布了非常严格的发动机尾气排放标准,促使工程师们必须不断降低有害微粒排放量。     

二十一世纪的汽车迎接挑战之三——燃油经济性和节能汽车（下）

本文就内燃机的发展及其面临的挑战作了详细的阐述，分析了发动机能量转换过程中的能量损失以及内燃机的负荷特性和燃油经济性，并全面介绍了提高发动机燃油经济性的新途径。     

博世节能减排安全等领域创新技术

内燃机技术改造(节能减排) 内燃机是近期主要驱动方式,而电动出行是长期发展方向. 博世公司在内燃机节能减排方面有不少创新科技. 1.新一代起动/停止系统 当汽车在城市遇上红灯或交通堵塞时,起动/停止系统使发动机停止运转,不消耗燃油,进一步降低油耗和CO2排放.在不同驾驶习惯下,新一代起动/停止系统可额外节省10％左右的燃油.第一代起动/停止系统在2007年开始量产.     

The improvement of the efficiency of fuel cells against the elimination of harmful emissions from the internal combustion engines

There are many candidates as the prime mover of vehicles for the 21st century. Fuel cells, advanced gasoline engines, advanced diesel engines or other systems including combinations of various combustion engines with the electric motor. Overviews of the pros and cons for these prime movers are explained and the compression ignition combustion system of premixed mixtures is positively reviewed as the most promising system.     

Emissions simulation in a 7000 kg-grade diesel hybrid electric vehicle

Hybrids combine a combustion engine with an electric motor and battery. The two technologies can be combined to reduce fuel consumption and exhaust emissions. This paper presents the concept of hybrid electric vehicles (HEVs) applied to truck or van vehicles with diesel engines. The simulation results from the advanced vehicle simulator (ADVISOR) demonstrate that the required power may be properly shared between the internal combustion engine and electric motor. The simulation can also be used to prove that the technique is useful for improvements in driving performance; additionally, the technique is suitable for hybrid electric vehicles, allowing for good fuel economy and low emissions performance.     

氢在车用发动机上的应用

氢是一种清洁可再生能源,燃烧后不会产生CO2、CO、HC等有害物质,是理想的石油替代产品。介绍了国内外氢发动机的发展与现状,对氢作为燃料在发动机上的应用方式、实现途径进行了阐述。针对氢发动机在发展过程中存在的氢制取和储运难、早燃、回火、功率密度低、NOx排放高等问题进行分析并给出了相应的解决措施。     

汽车排放控制技术发展趋势

介绍了日本和欧美等国制订的限制汽车排放污染的法规及其发展趋势。为了法规的实施，本文又介绍了在发动机内控制排放污染的各项技术和在机外采用的各种控制排放污染的装置及其再生技术。还介绍了燃料的改进、代用燃料等方面，以及最新的控制技术。     

Kriging assisted on-line torque calculation for brushless DC motors used in electric vehicles

Torque is one of the most important control factors for a vehicle’s motion. Compared with internal combustion engines, electric motors can have a more accurate torque feedback which brings a lot of advantages to vehicle dynamics and stability control. However, motors used in electric vehicles are facing more difficult conditions than those in conventional applications, such as extreme high/low temperature changing, vibration, aging, etc. The variation of motor parameters due to harsh working conditions can lead to serious problems for motor torque estimation and thus dynamic control of electric vehicles. In this paper, a new method using kriging to estimate the back EMF and thus accurately calculate motor torque in an on-line fashion is presented. With motor speed and rotor position as inputs, kriging predicts back EMF as the output that is used to calculate the motor torque with three phase currents. Using this novel method, motor torque can be accurately calculated even facing high/low temperatures or aging conditions. Experimental tests under the high temperature have been conducted to verify the applicability of the proposed method.     

电动汽车—未来的先进交通工具

介绍了电动汽车的发展史，电动汽车的技术发展状况及电动汽车关键设备的结构特点，指出找国汽车行业应加速电动汽车技术的开发，迎接未来无污染汽车法规的挑战。     

Exhaust nanoparticle emissions from internal combustion engines: A review

This paper reviews the particle emissions formed during the combustion process in spark ignition and diesel engine. Proposed legislation in Europe and California will impose a particle number requirement for GDI (gasoline direct injection) vehicles and will introduce the Euro 6 and LEV-III emission standards. More careful optimization for reducing particulate emission on engine hardware, fuel system, and control strategy to reduce particulate emissions will be required during cold start and warm-up phases. Because The diesel combustion inherently produces significant amounts of PM as a result of incomplete combustion around individual fuel droplets in the combustion zone, much attention has been paid to reducing particle emissions through electronic engine control, high pressure injection systems, combustion chamber design, and exhaust after-treatment technologies. In this paper, recent research and development trends to reduce the particle emissions from internal combustion engines are summarized, with a focus on PMP activity in EU, CARB and SAE papers and including both state-of-the-art light-duty vehicles and heavy-duty engines.     

垃圾填埋气内燃机的研制与试验

阐述了开发垃圾填埋气内燃机的重要性,分析了垃圾填埋气中CO2成分对垃圾填埋气内燃机有关参数的影响。以2190T天然气发动机为基础,采用提高压缩比、调整点火提前角、预燃室式燃烧室、进气增压等技术措施,初步开发出2190垃圾填埋气内燃机。试验结果表明,采用上述技术措施,可改善和提高垃圾填埋气内燃机的性能指标。     

21世纪的汽车发动机

从降低排放，改善燃油经济性两个方面，论述了２１世纪车用汽油机和车用柴油的发展趋势，经分析指标出，两种发动机在改善性能，降低排谚方面可以取长补短，相互相借鉴其新技术。     

谈减轻我国汽车发动机排气污染的实用技术

从我国的汽车保有状况、道路状况、汽车产品质量状况等方面，谈了治理汽车排气污染的迫切性。分别分析了汽油机、柴油机的排气污染物生成机理，分别从几个方面阐述减轻车用汽油机、柴油机排气污染的实用技术。