抄録
Lightening each part is needed as one method to improve the Fuel Economy of the car. On the other hand, a certain amount of mass is required for the brake rotor as thermal capacity because the main role of the brake is to convert the kinematic energy of the vehicle into the frictional thermal energy for decelerating the vehicle. Therefore, the appropriate heat design becomes important aiming at lightening brake parts. Many thermal analyses to design the strength and the cooling performance concerning the brake rotor are done. However, there are a few papers that treat the relation between the thermal analysis and the brake friction force. Authors have been developed the simple calculation method of the temperature on the friction surface where the pad and rotor come in contact. Then, it is found that contact form is one of factors in fluctuating brake friction force from the bench test data and the calculated friction surface temperature. In this paper, the calculation method of two dimensional temperature distribution of the rotor is proposed. The calculated results are effective to confirm the detail of radial temperature distribution of the rotor as a short time under braking. The tested pads and rotors were analyzed by EPMA on the friction surface. These results show that a detectable amount of tin is difference. It is found that the fluctuating brake friction force has affected by the relationship between the friction surface temperature and the melting point of tin.
