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Brake Rotor Corrosion and Friction Cleaning Effect on Vehicle Judder Performance
ISSN: 0148-7191, e-ISSN: 2688-3627
Published September 15, 2019 by SAE International in United States
This content contains downloadable datasetsAnnotation ability available
Brake disc corrosion has emerged as an important field of study within the automotive industry due to the wide range of lining materials that are currently used worldwide, and their inherent rust-cleaning properties. The presence of oxide layers irregularly deposited on the cast iron disc surfaces usually leads to a forced, braking-induced vibration that can reach the driver’s position as a pronounced annoyance. Hence, the friction material composition directly impacts on the judder performance during the early corrosion-removal stage.
This study incorporates both dynamometer and vehicle tests into the definition of a predictive methodology that allows corrosion-induced vibrations to be investigated at both system and vehicle levels. The oxide film is artificially generated by means of a salt spray chamber under steady-state climate conditions in order to guarantee a repetitive and robust procedure. The vibration response of the system is objectively evaluated in the form of caliper accelerations and pressure (BPV) / torque (BTV) oscillations throughout a reduced rust-removal test sequence composed of 30 snubs; basic spectral and order analyses are conducted with the gathered data. Furthermore, vehicle-based results are correlated with the subjective ratings that an expert driver gives to the different vibrations perceived at chassis level. The in-service roughness of the oxide layer, on the other hand, is indirectly monitored by using a couple of non-contacting capacitive sensors that measure the variation in disc thickness (DTV).
Ultimately, this paper is intended to characterize the inherent corrosion-cleaning capability of different friction materials -paying special attention to the presence of copper-, as well as revealing their impact on the vehicle judder subsequently induced during the actual removal of the oxide layers.
CitationMolina Montasell, N. and Ferrer, B., "Brake Rotor Corrosion and Friction Cleaning Effect on Vehicle Judder Performance," SAE Technical Paper 2019-01-2115, 2019, https://doi.org/10.4271/2019-01-2115.
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- Jacobsson , H. Aspects of Disc Brake Judder Proceedings of the Inst. of Mechanical Engineers, Part D: Journal of Automobile Engineering 217 6 419 430 2003 10.1243/095440703766518069
- Djafri , M. et al. Effects of Humidity and Corrosion on the Tribological Behaviour of the Brake Disc Materials Wear 321 8 15 2014 10.1016/j.wear.2014.09.006
- Abdul Hamid , M. K. et al. Frictional Characteristics under Corroded Brake Discs Procedia Engineering 68 668 673 2013 10.1016/j.proeng.2013.12.237
- Blau , P. , Truhan , J. , and A Kenik , E. Effects of the Exposure to Corrosive Salts on the Frictional Behavior of Gray Cast Iron and a Titanium-Based Metal Matrix Composite Tribology International 40 1335 1343 2007 10.1016/j.triboint.2007.02.020
- Shin , M. W. , Cho , K. H. , Kim , S. J. et al. Friction Instability Induced by Corrosion of Gray Iron Brake Discs Tribology Letters 37 149 157 2010 10.1007/s11249-009-9503-x
- Suganuma , Y. , Howse , F. , and Thornton , C. Dynamometer Simulation Study for Market Brake Judder SAE Technical Paper 2001-01-3191 2001 10.4271/2001-01-3191
- Park , C. W. , Shin , M. W. , and Jang , H. Friction-Induced Stick-Slip Intensified by Corrosion of Gray Iron Brake Disc Wear 309 89 95 2014 10.1016/j.wear.2013.11.008
- Cho , K. , Han , J. , Jang , H. , Kim , S. et al. Corrosion Induced Brake Torque Variation: The Effect from Gray Iron Microstructure and Friction Materials SAE Technical Paper 2005-01-3919 2005 10.4271/2005-01-3919
- Nukumizu , K. , Makizono , K. , Abe , T. , and Unno , M. Influence of Rust Accumulation on Disk Rotor on Frictional Properties of Disk Brake SAE Technical Paper 2007-01-3937 2007 10.4271/2007-01-3937
- Österle , W. , Prietzel , C. , Kloß , H. , and Dmitriev , A. I. On the Role of Copper in Brake Friction Materials Tribology International 43 2317 2326 2010 10.1016/j.triboint.2010.08.005
- Kim , S. , Lee , J. , Han , J. , Kim , Y. et al. The Role of Copper on the Friction and Wear Performance of Automotive Brake Friction Materials SAE International Journal of Materials and Manufacturing 5 9 18 2012 10.4271/2011-01-2367
- Hu , B. , Luk , S. , and Filip , P. Friction and Wear Responses with Metallic Composite Materials to Replace Copper and Copper Alloys in Brake Pad Formulations SAE Technical Paper 2016-01-1912 2016 10.4271/2016-01-1912
- Gilardi , R. , Alzati , L. , Thiam , M. , Brunel , J.-F. et al. Copper Substitution and Noise Reduction in Brake Pads: Graphite Type Selection Materials 5 2258 2269 2012 10.3390/ma5112258
- ASTM B117-18 2018 10.1520/B0117-18