共查询到19条相似文献,搜索用时 156 毫秒
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五、B7XA电控自动变速器 (一)B7XA电控自动变速器的结构特点 B7XA电控自动变速器为前轮驱动型自动变速器,它具有四个前进档和一个倒档。该自动变速器主要由液力变矩器、定轴式齿轮变速机构、液压控制系统和电子控制系统等四大部分组成。其主要特点是齿轮变速机构为定轴式,这与一般车辆广泛采用的行星齿轮变速传动机构有所不同。 B7XA电控自动变速器的结构如图68(a)、(b)所示。 相似文献
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目前在汽车上广泛使用的自动变速技术是将液力变矩器和行星齿轮系组合的自动变速器技术,但是液力变矩器和行星齿轮系的组合有着明显的缺点:传动比不连续,只能实现分段范围内的无级变速;液力传动的效率较低,影响了整车的动力性能与燃料经济性;增加变速器 相似文献
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液力自动变速器的齿轮变速机构,除少数(如本田轿车的液力自动变速器)采用定轴式齿轮变速机构外,大多采用行星齿轮变速机构.行星齿轮变速机构安装在变矩器后面,其作用是改变并将发动机的动力增扭后传给行星轴,其结构如图1所示. 相似文献
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由PSA集团和雷诺公司共同设计的AL4自动变速器,装备于雪铁龙Xantia中档轿车上。该变速器具有智能化程度高、换挡品质好、扭矩覆盖面大及结构紧凑等特点。该变速器采用带锁止离合器的扁平型三元件液力变矩器,行星齿轮变速机构采用的是CR-CR(辛普森2型)机构,换挡操纵机构采用推拉软轴式操纵机构。 相似文献
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按照结构及原理,自动变速器可以分为4种类型,分别是液力自动变速器(AT)、无级自动变速器(CVT)、电控机械自动变速器(AMT)、双离合器自动变速器(DCT)。液力自动变速器(AT)液力自动变速器的传动部分主要由液力变矩器和多排行星齿轮组成,它仍然分多档、几速,实际上是能实现局部无级变速的有级变速器。液力变矩器除了起离合器的作用,还具有无级连续变 相似文献
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二、行星变速系统 行星变速系统体积小、结构紧凑,便于实现自动换档,因此自动变速器多采用行星变速系统,4T65-E自动变速系统采用双排行星机构。 4T65-E自动变速器双排行星变速系统见图4。它通过双排行星变速系统不同组合提供了四个前进档和一个倒档,然后通过差速器最终驱动齿轮将扭矩传给前驱动轴。 相似文献
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1 概述 液力变矩器的无级变速性能虽然很好,但从经济性考虑它不能完全满足车辆改变速度和变化动力两方面的要求,故需与齿轮传动串联或并联,以扩大其传动比与高效率工作范围。齿轮传动有旋转轴式(行星齿轮系)与定轴式两种。虽然,人们熟悉的定轴式机械变速器工艺性好、成本低,但由于行星齿轮传动易于实现自动化、结构紧凑、质量轻,特别是其具有与液力变矩器可实现功率分流的长处,故目前AT中多为此型。显然机械传动在AT中属于辅助地位,故又称其为辅助变速器,这样完整的AT是由3部分组成(图1):液力变矩器、辅助变速器、自… 相似文献
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Torque control of engine clutch to improve the driving quality of hybrid electric vehicles 总被引:1,自引:0,他引:1
H. S. Hwang D. H. Yang H. K. Choi H. S. Kim S. H. Hwang 《International Journal of Automotive Technology》2011,12(5):763-768
As a powertrain for hybrid electric vehicles (HEVs), the automatic transmission (AT) is not only convenient for the driver
but also reduces hybridization costs because the existing production line is used to produce the AT. However, it has low fuel
economy due to the torque converter. To overcome this disadvantage, this paper studies HEVs equipped an AT without a torque
converter. In this case, additional torque control is needed to prevent the driving quality from deteriorating. This paper
suggests three different torque control methods and develops a simulator for an HEV that can simulate the dynamic behaviors
of the HEV when the engine clutch is engaged. The HEV drive train is modeled with AMESim, and a controller model is developed
with MATLAB/Simulink. A co-simulation environment is established. By using the developed HEV simulator, simulations are conducted
to analyze the dynamic behaviors of the HEV according to the control methods. 相似文献
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《Vehicle System Dynamics: International Journal of Vehicle Mechanics and Mobility》2012,50(5):283-295
Abstract In this work three first-order nonlinear, nonstationary differential equations describing a hydraulic torque converter in a power transmission system are used. A linear model is obtained on the basis of these equations. This model is verified both theoretically and by an experimental test. On the basis of the calculations the torsional damping was determined. This permitted the damping performance of a power transmission system with a hydraulic torque converter to be defined and established. 相似文献
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《JSAE Review》1999,20(2):281-287
A new belt-drive continuously variable transmission (CVT) has been developed and installed in a 2-liter class vehicle for the first time in the world. This paper describes the technical features of this high torque capacity transmission, the need for a torque converter, the importance of electronic control and the driving modes achieved. This new CVT provides better driving performance and fuel economy than current CVTs and 4-speed automatic transmissions. 相似文献
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C. Szczepaniak A. Kesy Z. Kesy 《Vehicle System Dynamics: International Journal of Vehicle Mechanics and Mobility》1991,20(5):283-295
In this work three first-order nonlinear, nonstationary differential equations describing a hydraulic torque converter in a power transmission system are used.
A linear model is obtained on the basis of these equations. This model is verified both theoretically and by an experimental test. On the basis of the calculations the torsional damping was determined. This permitted the damping performance of a power transmission system with a hydraulic torque converter to be defined and established. 相似文献
A linear model is obtained on the basis of these equations. This model is verified both theoretically and by an experimental test. On the basis of the calculations the torsional damping was determined. This permitted the damping performance of a power transmission system with a hydraulic torque converter to be defined and established. 相似文献
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自动变速器技术的最新动态和发展趋势 总被引:7,自引:0,他引:7
随着车辆自动变速器理论与设计制造技术的不断完善,其应用范围越来越广泛。文中指出,自动变速器技术的发展方向是多挡化、电控化,液力变矩器自锁区域的低速化以及其传动部件的小型化、大容量化和高强度化;而无级变速器技术的发展则呈现轻量小型化、大容量化和控制最佳化的趋势。 相似文献
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自动变速器液力变矩器的专用生产解决方案有助于提高装配精度,节约时间,降低成本,还为员工创造了一个更健康的工作环境。 相似文献