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Study on Low Speed Judder of Wave Type Brake Discs for Motorcycles
ISSN: 0148-7191, e-ISSN: 2688-3627
Published November 13, 2006 by SAE International in United States
Annotation ability available
This study discussed the mechanism of the low speed judder for wave type brake disc developed newly for recent motorcycles. Wavy disc was examined to investigate the effect of wave configurations on the BTV (Brake Torque Variation) behavior. Torque amplitude in braking was compared with respect to the revolution order which represented the multiple number of the number of revolutions. To explain the mechanism at the mode showing largest BTV, the elastic deformation of the pad was analyzed by finite element method concerning geometrical nonlinearity with commercial code. This study found that most crucial BTV appeared on low speed judder was observed at the 3 rd peaks on the revolution order. Test data showed that this crucial BTV was related with the number of waves at the disc periphery, and caused by the indentation of the pad into notched part at disc periphery. Finally, current paper proposed an effective model to predict the amplitude at high order of BTV calculating with the indentation of the pad and the line pressure. The amplitude at high order of BTV can be predicted with the indentation of the pad and the line pressure.
CitationObunai, K., Okubo, K., Fujii, T., and Nakatsuji, T., "Study on Low Speed Judder of Wave Type Brake Discs for Motorcycles," SAE Technical Paper 2006-32-0026, 2006, https://doi.org/10.4271/2006-32-0026.
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