Influence of clutch tribodynamics on drivetrain noise, vibration and harshness, (NVH), phenomena
journal contributionposted on 2018-06-18, 08:53 authored by Ilias Minas, Nick MorrisNick Morris, Stephanos TheodossiadesStephanos Theodossiades, M. O'Mahony
Limiting problematic Noise, Vibration and Harshness (NVH) phenomena in the modern automotive drivetrain is a task of critical importance. The result of such phenomena is the aggravation of the driver, which results in a reduced perception of vehicle quality. Each phenomenon can be characterized by a distinct frequency range. The aim of the current study is to assess the influence of the interfacial frictional behavior of the dry friction clutch components on the drivetrain dynamic behavior. The dynamics of the system (in terms of its stability) are studied. Surface data from the clutch components are critical to understanding the complex engagement process. The coefficient of friction was measured using a rotary tribometer at representative slip speeds and contact pressures. To aid the analysis infinite focus microscopy was used to measure the geometric properties of the constituent components of the drivetrain. The current approach allows for improved understanding of the drivetrain’s dynamic behavior. The improved understanding of the coupling between tribological characteristics and drivetrain system dynamics can lead to the mitigation of future NVH issues.
The authors would like to express their gratitude to the Engineering and Physical Sciences Research Council (EPSRC) for the sponsorship of this research (EP/N509516/1). Thanks are also extended to Ford Motor Company for the support that was provided for this research.
- Mechanical, Electrical and Manufacturing Engineering