乘用车动力总成瞬态振动的分类

Farzan Barin, Kourosh Heidari Shirazi, Hamid M. Sedighi
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引用次数: 0

摘要

这项工作是对车辆传动系统在顶入/释放/顶出节流阀期间的瞬态振动行为的研究。考虑的车辆是一辆乘用轿车,前轮驱动,前置发动机配备四冲程四缸SI发动机和5速手动变速箱。发动机的模型遵循均值模型,包括动力学和燃烧参数(包括歧管/发动机体积、空气与燃料比、火花提前/延迟和RPM)对其瞬态指标和制动扭矩行为的影响。考虑了多级离合器非线性离合器弹簧模型和齿轮间隙对怠速和啮合齿轮的影响,建立了十四自由度集中参数扭振传动系统的初级模型。该模型被简化为六自由度模型。采用刚性二维模型和魔式公式对车辆-轮胎-道路动力学相互作用进行建模。利用整体模型,研究和总结了驾驶风格、发动机动力学和纵向车路动态交互在产生和加剧洗牌、哐当声和分流中的作用,作为本研究的重点。虽然研究结果验证了非线性刚度、齿隙和齿轮齿碰撞等非线性参数对振动冲击响应强度的重要性,但也证明了发动机的动力学/燃烧参数(如发动机体积、进气歧管体积、火花提前正时)和驾驶方式以及轮胎-路面参数(如摩擦系数和路面坡度)对振动冲击响应的加剧有重要作用。例如,(a)发动机越小,shuffle的振幅越大;(b)运动驾驶方式加重了碰撞和洗牌;(c)起跑时路面越滑,洗牌效果越强。驾驶员/发动机/传动系统/轮胎/道路整体模型的结果为更好地理解传动系统的振动冲击响应提供了更多的知识。
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Classification of transient vibration of passenger cars powertrain
This work is a study on transient vibrational behaviour of a vehicle driveline system during tip-in/released/tip-out throttle. The considered vehicle is a passenger sedan, front-wheel drive, front-engine equipped with a four-stroke four-cylinder SI engine and a 5-speed manual transmission. The engine's model follows the mean value model including the effects both dynamics and combustion parameters including manifold/engine volume, air to fuel ratio, spark advance/retard and RPM on its transient indicator and brake torque behaviour. A primary fourteen-degrees-of-freedom lumped parameter torsional driveline model including, a multi-staged clutch with nonlinear clutch springs model and the gear backlash effect on idle as well as engaged gears is considered. This model is reduced to a six-degrees-of-freedom model. A rigid 2D model and magic formula are used for modelling of vehicle-tyre-road dynamics interaction. Using the overall model, the role of the driving style, the engine dynamics and longitudinal vehicle-road dynamic interaction in creating and intensifying the shuffle, clonk, and shunt, are studied and summarized, as the particular focus of this study. Although the results verify the other related researches on the importance of nonlinear parameters such as nonlinear stiffness, backlash and gear teeth impact, on the intensity of vibro-impact responses, they prove that engine's dynamics/combustion parameters such as engine volume, intake manifold volume and spark advance timing as well as driving style and also tyre-road parameters such as coefficient of friction and road grade have significant role in intensifying the vibro-impact responses. For example, (a) the smaller the engine, the larger amplitude the shuffle; (b) the sport driving style intensifies the both the clonk and the shuffle and (c) the more slippery road in time of the tip-out, the more strengthen the shuffle. The results of the overall driver/engine/driveline/tyre/road model provide more knowledge towards better understanding of vibro-impact response of the driveline.
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来源期刊
CiteScore
4.10
自引率
11.10%
发文量
38
审稿时长
>12 weeks
期刊介绍: The Journal of Multi-body Dynamics is a multi-disciplinary forum covering all aspects of mechanical design and dynamic analysis of multi-body systems. It is essential reading for academic and industrial research and development departments active in the mechanical design, monitoring and dynamic analysis of multi-body systems.
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