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《Vehicle System Dynamics: International Journal of Vehicle Mechanics and Mobility》2012,50(4-5):365-376
SUMMARY This paper presents a fuzzy control system for the clutch engagement of an automated manual transmission. The servomechanism is assembled with a three-port pneumatic pressure-proportional valve and a position-sensing cylinder which control the release-lever displacement of 25 mm within the position preciseness of 0.1 mm against maximum spring load of 2kN. The fuzzy system is skillful to estimate the driver's will from the accelerator pedal operation. The servomechanism is mounted on a commercial vehicle with 4-ton pay-load. The system parameters are set up by bond graphs simulation and empirical performance tests are carried by using an oil-hydraulically operated engine-vehicle testing rig with a maximum torque capacity of 400 Nm. 相似文献
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Hirohisa Tanaka Professor Hideyuki Wada Researcher 《Vehicle System Dynamics: International Journal of Vehicle Mechanics and Mobility》1995,24(4):365-376
This paper presents a fuzzy control system for the clutch engagement of an automated manual transmission. The servomechanism is assembled with a three-port pneumatic pressure-proportional valve and a position-sensing cylinder which control the release-lever displacement of 25 mm within the position preciseness of 0.1 mm against maximum spring load of 2kN. The fuzzy system is skillful to estimate the driver's will from the accelerator pedal operation. The servomechanism is mounted on a commercial vehicle with 4-ton pay-load. The system parameters are set up by bond graphs simulation and empirical performance tests are carried by using an oil-hydraulically operated engine-vehicle testing rig with a maximum torque capacity of 400 Nm. 相似文献
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带同步器的手动变速器常规的机械设计和功能尽管多年来没有变化,但是诸如齿轮、轴承、密封、同步器,以及润滑油等所有组成部分都在不断地改进,产品的质量持续提高。本文研究的,是润滑油对同步器材料摩擦和磨损性能的影响。最近几年,同步器的材料已经多样化,从黄铜、钼基产品到烧结材料,每种合成物提供给设计者不同的磨损和耐久特性。尽管烧结铜是像黄铜一样的铜合金,但润滑油的反应却未必相同。因此,需要不断地修正润滑油成分,以获得匹配同步器材料的最佳效果。为了使变速器系统综合功能最佳,润滑液的流变性和化学特性处于平衡状态是必须的,氧化和密封性能也应该表现优异。 相似文献
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同步器是手动变速箱中最重要的零部件,其好坏直接影响到变速箱的换挡功能和换挡品质.为了提高工程技术人员在应用领域对同步器失效模式的深入理解,做到设计和零件质量控制上的提前预防,文章总结了在工程实践领域同步器系统常见的失效模式——打齿和挂挡困难,对失效模式的原因进行了分析,提前做到制造预防,避免不必要的成本损失. 相似文献
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对手变挡机构进行简化,建立了变挡机构力学物理模型;再对建立的物理模型根据理论力学进行力学分析,建立力学方程组进行方程变换,并利用MATLAB提供的优化算法fmincon函数,对建立的力学方程组进行最优求解,最后以某型号发动机变挡机构为实例进行计算,验证了该理论的正确性和可行性,为手变挡机构的设计计算提供了借鉴和理论依据。 相似文献
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机械式自动变速器微机控制系统 总被引:4,自引:0,他引:4
为了简化汽车的操纵 ,改善汽车的燃料经济性和动力性。开发了一种由干式离合器、齿轮变速器及电控系统构成机械式自动变速器。文中介绍了基本工作原理,重点说明了微机控制系统的设计,最后给出了实验结果。 相似文献
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2014年4月22日,为期一天的"2014中国汽车论坛"在北京召开。该论坛由工业和信息化部主办,中国汽车工业协会(CAAM)承办,堪称国内汽车行业高规格、全球化的论坛。从2011年开始本论坛已举办三届,时间都在北京、上海两大车展期间,地点也相应地设在北京或上海。"中国汽车论坛"有两个特色:一是顶级、高端,每届论坛开幕的前一天,中国政府部门、汽车业界大佬、论坛重要来宾都会举行一场闭门峰会,峰会没有记者出席,参会嘉宾倡议中国汽车行业政策、发展等重大问题;另一个是全球化,由中国汽车工业协会出面,该论坛每年都会邀请一些国外汽车组织的负责人,包括达沃斯经济论坛的专家等,论坛现场用中英文进行同声传译,论坛主题一般围绕中国和世界汽车产业的发展,具有全球视点。本届论坛的主题是"绿色驱动,合作共赢",主要探讨"新经济转型下的中国和世界汽车产业——趋势、挑战、策略"。上午主论坛发言嘉宾依次是:工业和信息化部部长苗圩、中国汽车工业协会会长徐建一、中国汽车工业协会秘书长董扬、世界汽车组织主席Patrick Blain、世界经济论坛美国分部资深总监John B.Moavenzadeh、清洁运输国际委员会乘用车项目、负责人Anup P.Bandivadekar、北京汽车集团有限公司总经理张夕勇。《汽车科技》作为重要支持媒体出席"2014中国汽车论坛",并进行全程报道。现将嘉宾精彩发言摘录如下,以飨读者。 相似文献
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《JSAE Review》1997,18(4):393-399
The motor units of hybrid electric vehicles (HEVs) have been developed with the aim of achieving good fuel economy and low emissions. We have developed a system for evaluating the performance of an HEV motor unit under various driving patterns. We review the function and performance of this system. 相似文献
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手动变速器是使用手拨动变速杆改变变速器内的齿轮啮合位置,进而改变传动比,改变发动机传到驱动轮上的转速和转矩,完成原地起步、爬坡、转弯、加速等功能.而六档的设置不仅可以提升换挡和行驶的平顺性、降低汽车的燃油消耗量、提升发动机的使用寿命,还能够更好地适应现代城市道路的实际交通现状和车主高速道路行驶的客观愿望等,因此六档(前... 相似文献
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R. Dosthosseini A. Z. Kouzani F. Sheikholeslam 《International Journal of Automotive Technology》2011,12(6):943-950
Hybrid electric vehicles are powered by an electric system and an internal combustion engine. The components of a hybrid electric
vehicle need to be coordinated in an optimal manner to deliver the desired performance. This paper presents an approach based
on direct method for optimal power management in hybrid electric vehicles with inequality constraints. The approach consists
of reducing the optimal control problem to a set of algebraic equations by approximating the state variable which is the energy
of electric storage, and the control variable which is the power of fuel consumption. This approximation uses orthogonal functions
with unknown coefficients. In addition, the inequality constraints are converted to equal constraints. The advantage of the
developed method is that its computational complexity is less than that of dynamic and non-linear programming approaches.
Also, to use dynamic or non-linear programming, the problem should be discretized resulting in the loss of optimization accuracy.
The propsed method, on the other hand, does not require the discretization of the problem producing more accurate results.
An example is solved to demonstrate the accuracy of the proposed approach. The results of Haar wavelets, and Chebyshev and
Legendre polynomials are presented and discussed. 相似文献
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双面离合器和双重离合器的机械式自动变速器比较 总被引:4,自引:0,他引:4
为使驾驶员有与驾驶自动变速器车辆同样的感觉.手动变速器正在向机械式自动变速器(AMT)演变。目前,有两种与传统中间轴式手动变速器结构截然不同的先进的机械式自动变速器.分别是双面离合器(DSCT)和双重离合器(DCT)的形式。比较了这两种机械式自动变速器,并分析了其主要优缺点。 相似文献