ディスクブレーキ面内鳴きに対するロータ鋳鉄粉付加の影響

抄録

Brake squeal is a major vibration problem in disc brake. Among the brake squeals, in-plane squeal is a particular suppress problem, so the purpose of this study is to elucidate the mechanism of occurrence of in-plane squeal and to suppress it. In this report, we focused on the disc rotor. We experimentally investigate the difference in the effect on in-plane squeal when mass is added to the rotor and when cast iron powder is added. First, when the natural frequency of the rotor due to mass addition was investigated, it was found that the natural frequency decreased. After that, when a braking experiment was conducted, the in-plane squeal was suppressed. Next, the natural frequency and damping ratio of the rotor due to the addition of cast iron powder were investigated. As a result, it was found that the damping ratio increased even though the natural frequency did not change. After that, when a braking experiment was conducted, in-plane squeal did not occur. Therefore, when mass is added to the rotor, the effect of suppressing in-plane squeal can be obtained by lowering the natural frequency. On the other hand, it was found that when cast iron powder was added, the effect of suppressing in-plane squeal was obtained by the damping effect without changing the natural frequency.