핀부트 홀 직경 축소와 브레이크 래틀노이즈의 상관 관계 분석 = Correlation Analysis between Pin-Boot Hole Diameter Reduction and Brake Rattle Noise

다국어 초록 (Multilingual Abstract)

Caliper rattle noise is mostly caused by vibrations applied to the wheel when the vehicle drives on an unpaved road or a paved road with continuous steps. This can be attributed to loosely fitted components, such as rubber or spring in the caliper. In this paper, we studied the relationship between reducing the size of the pin-boot hole and the brake rattle noise of a two-piston floating caliper. After analyzing the sound sources of the rattle noise, we controlled the tightening force of the pin-boot to improve rattle noise characteristics. This was achieved by reducing the diameter of the pin-boot seating hole in the torque member. The results of our study showed a high correlation between the reduction of the pin-boot seating hole and improvement in rattle noise, as the caliper body and the torque member can vibrate under a more integrated condition.
However, as an adverse effect, caliper sliding resistance may increase, leading to high drag and accelerating pad wear. Thus, we are proposing an optimal improvement design range after considering the trade-off relationship between caliper rattle noise and sliding resistance.