改善乘用车低转速振动的动力总成控制优化策略  

Optimal strategy of passenger car powertrain control for improving vibration at low engine speed

作　　者：张学锋 刘治文 陈国栋 杨云波 李守魁 ZHANG Xuefeng;LIU Zhiwen;CHEN Guodong;YANG Yunbo;LI Shoukui(R&D Institute,China FAW Co.,Ltd.,Changchun 130011,China)

机构地区：[1]中国第一汽车股份有限公司研发总院,长春130011

出　　处：《汽车安全与节能学报》2021年第2期193-200,共8页Journal of Automotive Safety and Energy

基　　金：国家重点研发计划资助(2020YFB2010300)。

摘　　要：为解决搭载自动变速器的乘用车在高挡低转速加速行驶时,车内存在振动并同时伴随低频轰鸣的问题,从振源、传递路径、发生机理等方面进行分析,论证了飞轮惯量、半轴刚度、扭转减振器刚度、动力吸振器、动力总成软件控制策略等方面对解决车内振动和轰鸣问题的效果。在综合评估项目周期、改动成本以及可实施性等因素后,通过一种动力总成标定控制的优化方案,来解决此振动问题。进行了实车噪声—振动—声振粗糙度(NVH)试验。结果表明:采用此优化策略的乘用车在高挡位、低转速加速行驶时,车内振动幅值综合减小44%,改善效果明显。The vibration source,transmission path and occurring mechanism were analyzed inside a passenger car equipped with automatic transmission accelerating at high gear and low engine speed to solve the problems of vibration accompanied with low frequency roar.The effect on solving the vibration and roar problems inside the car from the aspects of flywheel inertia,half shaft stiffness,torsional damper stiffness,dynamic vibration absorber and powertrain software control strategy were demonstrated.A way was adopted through powertrain calibration control after evaluating comprehensively the factors such as project cycle,modification cost and practicability,to optimize the vibration problems.A series of noise-vibration-harshness(NVH)experiment was conducted on real vehicle.The results show that the vibration amplitude inside the car can be decreased by 44%comprehensively driving at high gear and low engine speed with the optimization strategy.Therefore,the improvement effect is significant.

关 键 词：汽车舒适性 动力总成 振动轰鸣 滑摩控制 标定策略 

分 类 号：U467.1[机械工程—车辆工程]