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1.4 蹄块式自动离合器的结构、原理蹄块式自动离合器又称重锤自动离合器,离合器的结合与分离由发动机转速自动控制。且转速越高,蹄块的离心力越大,离合器传递的转矩越大。在无级自动变速机构中,离合器装在前无级变速和后 相似文献
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本田车采用平行轴式自动变速器,其变速机构的工作原理与手动变速器基本相同,不同点只在于它由液压离合器来控制不同挡位齿轮的啮合。倒挡是靠多啮合一个中间齿轮实现的,倒挡伺服机构通过拨动啮合套,使倒挡齿轮与输出轴啮合。在本田自动变速器中,只有离合器,没有制动器。也有些型号的自动变速器内部还有一个单离合器, 相似文献
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克莱斯勒300C车装备的42RLE型自动变速器是4速自动变速器,自动变速器的液力系统包括自动变速器油、油道、液压阀和各种主油路压力控制部件。使用的输入离合器总成容纳了降速挡离合器、超速挡离合器和倒挡离合器。42RLE型自动变速器还使用了分立的保持离合器——2/4挡保持离合器和低/倒挡保持离合器。 相似文献
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本文通过对自动离合器的结构、控制原理、执行机构、结合规律及影响因素等方面的介绍,分析了自动离合器的发展现状与前景。 相似文献
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针对机械自动变速汽车自动离合器的非线性、易受外部干扰和参数不确定性等特点,采用基于新型指数趋近规律的变结构控制实现自动离合器的有效控制。建立了自动离合器执行机构的动力学模型,并对其进行仿真。结果表明,与常规PID控制相比,这种新型指数趋近规律的变结构控制具有更好的控制性能。 相似文献
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Meng Li Michael Khonsari Ruzhou Yang 《International Journal of Automotive Technology》2018,19(3):473-488
The torsional vibration generated during clutch engagement directly affects the shifting quality of automatic transmissions, where the noise source stems from both the clutch and the gear set. To predict the dynamical response and driveline oscillation, a comprehensive mathematical model of the vehicle powertrain equipped with automatic transmission is developed with consideration of nonlinearities in the clutch and the planetary gear set. For the clutch, the dynamics of stickslip is described for the transition between the slipping to locked states. The gear backlash model is used to analyze the rattle noise of the planetary gear set. Based on extensive powertrain simulations for the clutch engagement process, the magnitude of vibration propagation in the driveline are predicted to identify the primary factors of noise generation. 相似文献
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This paper is a continuation of a previous paper titled ??Modeling and Model Predictive Control for Hybrid Vehicle?? published on IJAT/2011 describing a mathematical model and design for a model predictive controller for tracking speeds and simulations. The present paper further describes a fuzzy logic controller for the smooth and quick engagement of an automatic clutch. The described controller uses both fuzzy logic and slip control algorithms to enable automatic clutch engagement. Clutch engagement and comprehensive simulations for the hybrid vehicle are conducted in MATLAB R2009s. The research described herein offers theoretical solutions for how to better control clutch slip and engagement within realistic parameters used for hybrid vehicles. Algorithms and operations of this fuzzy logic controller can be implemented in electronic control units for automatic clutch engagements and gear-shifting processes. 相似文献
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