A Study on Improvement of the Thermal Deformation Robustness of Brake Disc for Braking Quietness of Eco-Friendly Vehicles

Jaehun Shim; Sera Hwang; Gabbae Jeon; ChangSup Kong

doi:10.22680/kasa2024.16.3.032

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2024 Vol.16, Issue 3 Preview Page Next Page

A Study on Improvement of the Thermal Deformation Robustness of Brake Disc for Braking Quietness of Eco-Friendly Vehicles 친환경 차량의 제동 정숙성을 위한 브레이크 디스크의 열변형 강건성 향상에 관한 연구

30 September 2024. pp. 32-37

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Abstract

Braking judder vibration caused by thermal deformation of disc has been a major problem in brake system for a long time and many researchers have analyzed its mechanisms and developed solutions. However, judder vibration still occurs due to harsher vehicle driving conditions like increased power of EV (Electric Vehicle) and various environmental characteristics. In particular, in the case of eco-friendly vehicles such as EV, it is predicted that judder vibration will become a bigger problem due to the quiet driving condition compared to ICE (Internal Combustion Engine) vehicles. In addition, existing studies on judder vibration have been focused on the capacity and thermal deformation of the braking friction surface. So, the influence analysis of thermal deformation on the non-friction surface of the brake disc is relatively insufficient. In this study, we attempt to secure braking characteristics that are insensitive to thermal deformation in terms of the non-friction surface of the disc, focusing on the coning characteristic that occurs during braking thermal deformation. For this purpose, various factors of the non-friction surface of the disc are analyzed using robust design. The design standard for the robustness of the brake disc against judder vibration is proposed through the research results.

Keywords

Judder vibration(저더 진동)

Coning(코닝)

Robust design(강건설계)

Non-friction, Surface(비마찰면)

SN(Signal-to-Noise) Ratio(신호대 잡음비)

References

H. S. Kim, C. B. Kim, and H. J. Yim, 2003, "Quality improvement for brake judder using design for six sigma with response surface method and sigma based robust design," International Journal of Automotive Technology, Vol. 4, No. 4, pp. 193~201.

T. Okamura and H. Yumoto, 2006, "Fundamental study on thermal behavior of brake disc," SAE International, 2006-01-3203.

10.4271/2006-01-3203

B. Krough, L. Dyar, and P. Bary, 2011 "Adapting on-vehicle brake drag testing to a bench dynamometer," SAE International, 2011-01-2376.

10.4271/2011-01-2376

J. M. Kim, M. G. Lee, B. J. Kim, and C. D. Cho, 2013, "A prediction of the relation between the disc brake temperature and the hot judder critical speed," Transaction of KSAE, Vol. 21, No. 1, pp. 61~67.

10.7467/KSAE.2013.21.1.061

Y. K. Chang and J. R. Hwang, 2013, "Numerical model for prediction of brake judder due to wear and dust," International Journal of Automotive Technology, Vol. 14, No. 3, pp. 375~384.

10.1007/s12239-013-0041-z

J. H. Park, T. W. Park, J. H. Lee, and M. H. Cho, 2014, "Hot judder simulation of a ventilated disc and design of an improved disc using sensitivity analysis," International Journal of Automotive Technology, Vol. 15, No. 1, pp. 1~6.

10.1007/s12239-014-0001-2

C. Kim and T. J. Ha, 2016, "Optimization of an automotive disc brake cross-section with least thermal deformation by taguchi method," Transaction of KSAE, Vol. 24, No. 1, pp. 1~9.

10.7467/KSAE.2016.24.1.001

T. S. Jung, B. W. Cha, Y. H. Hong, C. M. Kim, Y. H. Hong, and C. D. Cho, 2016, "An experimental Study for machined patterns of friction surface on disc brake rotor in performance aspect," Transaction of KSAE, Vol. 24, No. 4, pp. 471~479.

10.7467/KSAE.2016.24.4.471

J. H. Shim, U. H. Shin, and G. B. Jeon, 2018, "A study on analysis and test for improvement factors of brake stiffness feeling," Journal of auto-vehicle safety association, Vol. 10, NO. 3, pp. 38~44.

S. C. Han and B. G. Lee, 2018, "A study on convergence contact behavior of friction heat and pad on disk brake," Journal of the Korea Convergence Society, Vol. 9, No. 1, pp. 283~289.

J. H. Shim, U. H. Shin, J. H. Lee, S. R. Hwang, W. S. Yim, and B. C. Kim, 2020, "A study on development of brake system of Light eco-friendly car considering heat load and regenerative braking characteristic," Journal of auto-vehicle safety association, Vol. 12, NO. 2, pp. 7~13.

J. H. Jeong and E. S. Shin, 2022, "Experimental study on the effects of the brake disc thickness variation and run-out on the cold judder," Transaction of KSAE, Vol. 30, No. 5, pp. 397~403.

10.7467/KSAE.2022.30.5.397

Information

Publisher :Korean Auto-vehicle Safety Association
Publisher(Ko) :한국자동차안전학회
Journal Title :Journal of Auto-vehicle Safety Association
Journal Title(Ko) :자동차안전학회지
Volume : 16
No :3
Pages :32-37
Received Date : 2024-03-29
Revised Date : 2024-07-31
Accepted Date : 2024-08-02
DOI :https://doi.org/10.22680/kasa2024.16.3.032

Journal of Auto-vehicle Safety Association ISSN:2005-9396(Print) 자동차안전학회지

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