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51141.甲醇混合气自燃的压力振荡特性研究
[汽车制造业] [2015-09-10]
以一台增压中冷压燃式发动机为试验样机,在其第1缸进行甲醇混合气自燃试验,分析甲醇自燃的压力振荡特性,研究超级爆震中破坏性压力波形成的规律。研究结果表明:随着过量空气系数的减小,甲醇自燃的概率有上升的趋势;而在同一过量空气系数下,上止点前着火的循环最高燃烧压力和压力振荡幅度远大于上止点后着火的循环,振荡频率也较高,并且随着着火时刻靠近上止点,最高燃烧压力和压力振荡的幅度与频率均增大;自燃时刻位于上止点前附近时,压力振荡的破坏性最大;甲醇自燃与超级爆震类似,具有间歇性。
关键词：甲醇；自燃；压力振荡；超级爆震
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51142.基于EEMD形态谱和KFCM聚类集成的滚动轴承故障诊断方法研究
[汽车制造业] [2015-09-10]
针对滚动轴承的故障诊断问题,提出了一种基于集总经验模态分解(EEMD)、形态谱特征提取和核模糊C均值聚类(KFCMC)集成的故障诊断新方法。首先,对实测的滚动轴承振动信号进行EEMD分解,得到若干个代表不同振动模态的内禀模态函数(IMF);其次,基于峭度、能量和均方差三个评价指标,从分解得到的若干个IMF分量中选出含有故障特征信息最丰富的3个IMF分量作为诊断用的数据源;然后在选定尺度范围内提取每个IMF分量的形态谱平均值,将三个形态谱平均值构成一个三维特征向量,作为一个样本,形成样本集;最后,利用KFCMC完成对滚动轴承不同故障的分类识别。此外,为了对比说明该方法的识别效果,还将振动信号用经...
关键词：故障诊断；滚动轴承；集总经验模态分解；形态谱；核模糊C均值聚类
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51143.基于Cruise的燃料电池增程式电动汽车再生制动转矩分配策略研究
[汽车制造业] [2015-09-10]
以锂电池SOC、车速和制动强度为约束条件,提出2种针对燃料电池增程式电动汽车再生制动转矩的分配策略。基于Cruise/Simulink联合仿真平台,对2种制动转矩分配策略进行了对比分析。结果表明,与并联再生制动系统相比,在4种典型工况下串联再生制动系统的锂电池单独驱动续驶里程增加率最大达11.66%,总续驶里程增加率最大达12.08%,制动能量回收率均增加了29%以上。
关键词：燃料电池增程式电动汽车；再生制动；转矩分配；联合仿真
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51144.全球汽车离合器市场报告（2015-2019年）
[汽车制造业] [2015-09-09]
An automotive clutch is an integral part of the automotive drivetrain system. It transfers an engine’s power to the gearbox, ensuring uninterrupted running of the engine. It also ensures continuous transmission while changing the gears. The enactment of stringent emission norms and the growing need for fuel-efficient cars have forced automotive clutch and transmission manufacturers to develop improved clutch and transmission systems like dual-clutch transmission (DCT) systems. In addition, the rising demand for automobiles in India, China, South Korea, and Japan will boost market growth. Cars equipped with automated manual transmission (AMT) systems are also gaining popularity in countries like India, as they are less expensive than cars with automatic transmission (AT) systems.
关键词：汽车离合器；汽车传动系统；发动机；变速箱；离合器变速器（DCT）系统
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51145.全球汽车主动安全市场报告（2015-2019年）
[汽车制造业] [2015-09-06]
Automotive active safety refers to safety systems that are active or activate prior to an accident to reduce the chances of an accident. Most of these active safety systems are classified as ADAS (advanced driver assistance systems). These systems may range from BA to ABSs to ESC and NVSs. The global automotive active safety market is expected to grow rapidly at a CAGR of 19.2% during 2014-2019. APAC dominated the market in 2014 and is expected to be the fastest-growing region during the forecast period.
关键词：汽车主动安全；活跃或激活；安全系统；减少事故；高级驾驶辅助系统；ABSS；ESC；NVSS
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51146.美国低排放汽车市场报告（2015-2019年）
[水利、环境和公共设施管理业,汽车制造业] [2015-09-06]
Among the vehicles that run on alternative energy sources, FFVs account for the highest volume and are the most practical in terms of vehicle performance, reliability, and stability. FFVs are designed to run on a blend of gasoline and ethanol (E85). Henry Ford introduced the concept of flexible fuel engines in 1920. However, this idea could be transformed into a practical and feasible technology only by 1990s.
关键词：替代；能源运行车辆；灵活燃料汽车；最实用；车辆性能；稳定性；灵活燃料汽车
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51147.全球赛车轮胎市场报告（2015-2019年）
[汽车制造业,橡胶和塑料制品业] [2015-09-06]
Racing tires are a range of high-performance tires that are customized for usage in racing vehicles. Production of racing tires is capital-intensive, requiring a significant degree of hi-tech equipment coupled with highly trained and skilled manpower dedicated to the purpose of engineering and manufacture. Racing tires are designed to deliver superior performance, and therefore undergo various quality, durability, and speed tests. Besides natural and synthetic rubber as the primary raw material, textile reinforcements like rayon, aramid, nylon, and polyester are also used to manufacture racing tires.
关键词：赛车轮胎；高性能轮胎；资本密集型；高科技设备；优越性能；质量；耐用性；速度测试
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51148.全球汽车NVH材料市场报告（2015-2019年）
[汽车制造业] [2015-09-06]
Automotive NVH materials reduce unwanted noise, vibrations (oscillations due to automobile mechanics), and harshness (the level of discomfort) in automobiles. Noise in vehicles may be caused by the engine, road, brakes, exhaust system, cooling fans, or external wind noise. Automotive NVH materials perform either acoustic absorption or acoustic insulation functions to absorb the noise and prevent it from entering the inside of the vehicle, thereby enhancing the overall driving comfort.
关键词：汽车；NVH材料；振动；粗糙度；吸声；隔音功能；提高；驾驶舒适性
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51149.全球装甲车辆升级和改造市场报告（2015-2019年）
[铁路、船舶、航空航天和其他运输设备制造业,汽车制造业] [2015-09-06]
Armored vehicles include ground combat and transportation vehicles used by landbased military forces for operations such as transporting cargo and military personnel, as well as for operating in active combats. These vehicles are protected by armor and in many cases armed with weapons. Armored vehicles provide significant strength to a country’s army and are used in large numbers by military forces around the world.
关键词：装甲车；陆基地面作战；运输车辆；活性搏斗操作；装甲保护
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51150.全球汽车凸轮轴市场报告（2015-2019年）
[汽车制造业] [2015-09-06]
Internal combustion engines are the most popular and commonly used engines in the automotive industry. During the process of combustion, a mixture of fuel and air is supplied into the cylinder chamber of the vehicle through an intake valve. The left-out emission is pushed through the exhaust valve after combustion, which is disposed through the tailpipe. Camshaft is one of the most vital components of the vehicle, also known as the heart of the vehicle, which monitors and controls this inlet of fuel and air mixture and emission of exhaust particles from the vehicle’s cylinder chamber.
关键词：内燃机；发动机；汽车行业；燃料和空气；凸轮轴；控制燃料
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