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为产生确定的输出运动,对汽车自动变速器行星齿轮机构中的部件而言,必须要有驱动和止动装置.通常,可将为行星齿轮机构部件提供驱动力和止动力的装置,一并称为执行机构.汽车自动变速器所采用的执行机构,一般由湿式多片离合器,湿式多片或带式制动器以及单向离合器等组成. 相似文献
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随着环境污染和能源危机问题日益突出,新能源汽车成为汽车行业新的发展趋势,其中混合动力汽车的动力耦合机构是新能源汽车研究重点之一。文章介绍了一种新的双行星排动力耦合机构,并对其结构和工作模式进行了分析,并用杠杆法与功率流方块简图相结合的方法对该双行星排耦合机构进行功率流分析研究,确定该系统产生功率循环的主要因素,为双行星排动力耦合装置的优化设计提供分析方法和依据。 相似文献
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正丰田油电混合动力系统,既节能减排,且动力十足,科技时尚感强,引领了环保新风尚。凯美瑞作为混联式重混型车型,使用了丰田混合动力THS-II车辆传动桥总成(如图1所示),采用了复合行星齿轮传动机构(如图2所示),包括2个马达发电机(MG1、MG2)、动力分配行星齿轮机构和马达减速行星齿轮机构。一、结构组成原理(如图3所示)1.动力分配行星齿轮机构此机构的太阳轮连接MG1的转 相似文献
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09E自动变速器具有挡位多、变速范围大、燃油经济性好、污染排放量低、结构紧凑、成本低等优点。同时具备增设挡位和扩大变速范围就能有效地提升燃油经济性和降低污染排放量的特点。“Lepelletier”的行星齿轮组是由一个Ravigneaux-双行星齿轮组和一个初级行星齿轮机构组合而成的六挡行星齿轮装置,并且变速器的换挡执行元件含有3个离合器和两个制动器,通过5个换挡执行元件的配合,从而实现换挡。各挡位在换挡执行元件的配合下,分析行星齿轮装置各部件的运动状态,进而分析出变速器各挡位的动力传递过程,并通过联立运动方程计算出相应的传动比。掌握自动变速器行星齿轮装置的结构原理、换挡执行元件及动力传递路线是自动变速器故障诊断的重要依据。 相似文献
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Jongryeol Jeong Namwook Kim Wonsik Lim Yeong-Il Park Suk Won Cha Myeong Eon Jang 《International Journal of Automotive Technology》2017,18(5):891-900
In a hybrid electric vehicle (HEV) system, it is an important issue on how to distribute the output power from multiple power generating components to operate a vehicle more efficiently. Many studies have been conducted on how to manage multiple power sources of a vehicle based on various optimization theories. In this study, an algorithm to calculate the optimization of a series HEV that has three power generating components, engine, battery and ultra-capacitor, is developed based on dynamic programming. Normally dynamic programming is applied to the optimization of power management and components sizing by estimating potential fuel economy for electrified vehicle such as HEV, Plug-in HEV or Fuelcell HEV. In contrast with most objective systems that have only two power generating components, the system in this study has three power sources. Since the system has three power sources, the number of state and control variables of optimization problem increases. Therefore the number of calculations increases unreasonably. To decrease the number and time of calculations, a new electric model that contains the both characteristics of battery and ultra-capacitor is developed with some assumptions. In comparison with the optimization algorithm which follows the theory of DP with no assumptions, the results from the newly developed algorithm has 1.04 % discrepancy in terms of fuel economy, even though the calculation time decreases to 4400 times less. 相似文献
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