On the Effect of Clutch Dynamic Properties on Noise, Vibration and Harshness Phenomena 2020-01-1510
Noise, vibration and harshness (NVH) phenomena can manifest themselves during the engagement and disengagement of dry friction clutch systems. Such phenomena can have a negative impact on cabin occupants’ driving experience as well as on others in the immediate vicinity of the vehicle. Typically, unwanted NVH phenomena that pertain to the clutch system include Judder, Chatter, Squeal and Eek. These are recognized by the quality of the radiated noise, as well as the dynamics occurring during clutch actuation. The aim of the current study is to utilize a numerical clutch system model (fully coupling the main motions of the clutch components) to predict clutch dynamics during engagement manoeuvres. The model will be used to assess the effect of various clutch design parameters on mitigating system instability. The clutch model utilizes measured coefficient of friction data from a rotary tribometer at representative slip speeds and friction surface contact pressures. The paper highlights potential NVH issues and demonstrates the improvement of such unwanted behavior through varying clutch system dynamic properties. Improved understanding of the parameters that affect clutch dynamic stability can lead to NVH improvement.
Citation: Minas, I., Morris, N., Theodossiades, S., O'Mahony, M. et al., "On the Effect of Clutch Dynamic Properties on Noise, Vibration and Harshness Phenomena," SAE Int. J. Adv. & Curr. Prac. in Mobility 3(2):1059-1067, 2021, https://doi.org/10.4271/2020-01-1510. Download Citation
Ilias Minas, Nicholas Morris, Stephanos Theodossiades, Martin O'Mahony, Jeronimas Voveris
Loughborough Univ., Ford Motor Company Ltd
11th International Styrian Noise, Vibration & Harshness Congress: The European Automotive Noise Conference
SAE International Journal of Advances and Current Practices in Mobility-V130-99EJ