| Prediction of Transient Internal and External Temperatures in Shock Absorbers Under Different Force Levels |
Fatih Aydemir1,2
, Özgür Karaoğlan1, Hüseyin Pehlivan2 |
1Chassis Technology Core Engineering, ZF Sachs, Sahabettin Bilgisu Street, G.O.S.B, Gebze, 41400, Kocaeli, Turkey
2Mechanical Engineering, Sakarya University, 54050, Sakarya, Turkey |
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Received: July 11, 2025; Revised: July 11, 2025 Accepted: October 8, 2025. Published online: December 19, 2025. |
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| ABSTRACT |
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In this study, a thermal mathematical model is presented to predict the transient temperature differences between the inner surface of the pressure tube and the outer surface of the outer tube under damping forces in twin-tube shock absorbers used in the automotive industry. The experimental setup uses the different setting of Hydraulic Rebound Stop (HRS) to produce different damping forces. The HRS feature increases the hydraulic resistance by reducing the pressure tube volume during the rebound stroke, thus providing additional hydraulic resistance and causing more heat generation compared to standard shock absorbers. This additional energy dissipation is converted into heat, leading to a higher internal temperature increase. The developed model allows the temperature evolution on both the inner and outer surfaces to be predicted over time. The experimental setup uses different settings of the Hydraulic Rebound Stop (HRS) to generate different damping forces. |
| Key Words:
Heat transfer · Temperature rise · Termal model · Mathematical model · Twin-tube shock absorber |
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Corresponding Author.
Hüseyin Pehlivan , Email. 
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