著者

倉迫 涼一 大日方 五郎 鳥谷 和史

出版者

一般社団法人 日本機械学会

雑誌

日本機械学会論文集C編 (ISSN:18848354)

巻号頁・発行日

vol.79, no.800, pp.991-1002, 2013 (Released:2013-04-25)

参考文献数

13

被引用文献数

1 1

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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.

著者

倉迫 涼一

出版者

一般社団法人 日本機械学会

雑誌

日本機械学会論文集C編 (ISSN:18848354)

巻号頁・発行日

vol.78, no.786, pp.462-473, 2012 (Released:2012-02-25)

参考文献数

6

被引用文献数

2 1

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Demands to vehicles performance from environmental view points are growing these days. Lightening each part is needed as one method to improve the Fuel Economy of the car. The main role of brakes is to transfer the kinematic energy of the vehicle to the dissipative thermal energy, and accordingly to lead the deceleration of the vehicle. On the other hand, a steady braking performance is important because it drives comfortably. The appropriate design of brakes for the stable performance requires the understanding of the temperature distribution based on the analysis of heat transfer. The friction force in a brake system is generated by making contact of the pad with the rotor. This study presumed that the friction force is depending upon the temperature of the surface where the pad and rotor come in contact. This study proposed a calculation method for estimating the temperature of the friction surface. Moreover, this study conducted the experiments to compare with the estimates from the proposed method. The experimental results agree with the estimations calculated from the proposed method. Based on the temperature distribution calculated by this method, considering how the shapes of the pad have an influence on the generated brake force.