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Integrated Thermal and Dynamic Analysis of Dry Automotive Clutch Linings

Wolfson School of Mechanical, Electrical and Manufacturing Engineering, Loughborough University, Leicestershire LE8 4AA, UK
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Appl. Sci. 2019, 9(20), 4287; https://doi.org/10.3390/app9204287
Received: 23 July 2019 / Revised: 26 September 2019 / Accepted: 9 October 2019 / Published: 12 October 2019
(This article belongs to the Section Mechanical Engineering)
Optimum operation of clutch systems is dictated by their dynamic as well as thermal performance. Both of these aspects are closely related to the interfacial frictional characteristics of the clutch lining material, which also affects the noise, vibration and harshness response of the entire vehicular powertrain system. Severe operating conditions such as interfacial clutch slip and increased contact pressures occur during clutch engagement, leading to generation of contact heat, and higher clutch system temperature. Therefore, any undesired oscillatory responses, generated during clutch engagement, such as take-up judder phenomenon can exacerbate generated heat due to stick-slip motion. The paper presents an integrated thermal, and 9-DOF dynamic model of a rear wheel drive light truck powertrain system. The model also includes experimentally measured clutch lining frictional variations with interfacial slip speed, non-linear contact pressure profile and generated surface flash temperature. It is shown that severe torsional oscillations known as take-up judder lead to an increased overall clutch temperature. It also shows that ageing of clutch lining material alters its dynamic and thermal performance. View Full-Text
Keywords: automotive dry clutch; torsional vibrations; take-up judder; thermal network model; clutch lining temperature automotive dry clutch; torsional vibrations; take-up judder; thermal network model; clutch lining temperature
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MDPI and ACS Style

Gkinis, T.; Rahmani, R.; Rahnejat, H. Integrated Thermal and Dynamic Analysis of Dry Automotive Clutch Linings. Appl. Sci. 2019, 9, 4287.

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