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Methodology: Automatic transaxle lash study for park disengagement clunk

机译:方法论:公园脱离丛生的自动变速帽睫毛研究

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The purpose of this paper is to explain a methodology for diagnosing noise and vibration of internal components of the automatic transaxle and particularly for park disengagement clunk. The method for determining contributing lash is three-fold. First the lash values are physically measured. Secondly, in-vehicle test data is taken using accelerometers, microphones, and stress gages. The data is taken at a baseline condition and then when various lash interfaces are set at zero. Thirdly, component impact testing can be done to identify noise contributing parts. For the condition of park disengagement clunk this method helps to diagnose the source of the noise. When a vehicle is parked on an incline and the transaxle put in park, there is an energy transfer of the weight of the vehicle through the transmission and onto the suspension of the vehicle. When the transmission is pulled out of park, the released energy results in a loud clunk. The clunk has a high and low frequency content. This study shows how the higher frequency responses of the transaxle internals can be identified. The suggestion that this method makes of grouping components together to find particular NVH contributors is significant for reducing costs and test time. The result is an opportunity for reducing the specific lash(es) that contribute to automatic transaxle noise and vibration. The methodology is demonstrated on the park disengagement clunk problem and can also be used for other transaxle NVH phenomena such as tip-in and back out clunk. It can be used to diagnose noise and vibration for rear-wheel-drive transmission applications as well.
机译:本文的目的是解释用于诊断自动变速帽的内部部件的噪声和振动的方法,特别是对于公园脱离隧道。确定贡献睫毛的方法是三倍。首先,睫毛值物理测量。其次,使用加速度计,麦克风和应力计进行车载测试数据。数据以基线条件拍摄,然后当各种睫毛接口设置为零时。第三,可以进行组件冲击测试以识别噪声贡献部件。对于Park Disengagement Clunk的条件,此方法有助于诊断噪声源。当车辆停放在斜坡上并且横桥放入公园时,通过传动和车辆的悬架能够传递车辆的重量。当传输被拉出公园时,释放的能量导致喧闹的速度。跨越具有高频率内容。本研究表明,如何识别跨桥内界的较高频率响应。该方法将组件分组为查找特定的NVH贡献者的建议对于降低成本和测试时间来说是显着的。结果是减少有助于自动转桥噪声和振动的特定睫毛和振动的机会。该方法在公园脱离封闭问题上展示了,也可以用于其他转桥NVH现象,如提示和退出码头。它也可用于诊断后轮驱动传输应用的噪声和振动。

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