SAE 2020-01-1508.pdf (867.39 kB)

On predicting automotive clutch torsional vibrations

Download (867.39 kB)
conference contribution
posted on 19.11.2020, 15:49 by T Gkinis, Ramin Rahmani, Homer Rahnejat
© 2020SAE International. All Rights Reserved. Automotive clutches are prone to rigid body torsional vibrations during engagement, a phenomenon referred to as take-up judder. This is also accompanied by fore and aft vehicle motions. Aside from driver behaviour in sudden release of clutch pedal (resulting in loss of clamp load), and type and state of friction lining material, the interfacial slip speed and contact temperature can significantly affect the propensity of clutch to judder. The ability to accurately predict the judder phenomenon relies significantly on the determination of operational frictional characteristics of the clutch lining material. This is dependent upon contact pressure, temperature and interfacial slip speed. The current study investigates the ability to predict clutch judder vibration with the degree of complexity of the torsional dynamics model. For this purpose, the results from a four and nine degrees of freedom dynamics models are compared and discussed. Subsequently, the predictions are compared with the acquired data from an automotive driveline test rig. It is shown that the complexity of the dynamic model, intended for the study of a clutch system, can be as important as the thermo-mechanical and frictional properties of the clutch friction lining material.

History

School

  • Mechanical, Electrical and Manufacturing Engineering

Published in

SAE Technical Paper

Issue

2020

Source

11th International Styrian Noise, Vibration & Harshness Congress: The European Automotive Noise Conference

Publisher

SAE

Version

AM (Accepted Manuscript)

Rights holder

© SAE

Publisher statement

This paper was accepted for publication in the journal SAE Technical Paper and the definitive published version is available at https://doi.org/10.4271/2020-01-1508

Acceptance date

30/09/2020

Publication date

2020-09-30

Copyright date

2020

ISSN

0148-7191

eISSN

2688-3627

Language

en

Location

Graz, Austria

Event dates

3rd November 2020 - 3rd November 2020

Depositor

Dr Ramin Rahmani. Deposit date: 16 November 2020

Article number

2020-01-1508