Browse Publications Technical Papers 2018-01-1537
2018-06-13

Influence of clutch tribodynamics on drivetrain Noise, Vibration and Harshness, (NVH), phenomena 2018-01-1537

In the modern automotive drivetrain limiting problematic Noise, Vibration and Harshness (NVH) phenomena is a critical task. The result of such phenomena is the aggravation of the driver and in turn a reduced perception of vehicle quality. Each phenomenon is characterised by a distinct irritable frequency range. The aim of the current study is to assess the influence of the surface characteristics of the dry friction clutch components on the drivetrain dynamic behaviour. The dynamics of the system are studied numerically. Surface specific data from the clutch components are critical to understanding the complex engagement process. The coefficient of friction was measured using a pin on disc rig at representative slip speeds, contact pressures and temperatures. To aid the analysis a coordinate measuring machine and infinite focus microscope were used to measure the geometric properties of the constituent components of the drivetrain. The current method allows for an improved understanding of drivetrain dynamic behaviour. The improved understanding of the coupling between tribology characteristics and drivetrain system dynamics can lead to the mitigation of NVH issues.

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