Thermal analysis of magnetorheological brake for automotive application

Researchers are exploring potential of magnetorheological (MR) brakes for automotive applications. These are superior to conventional hydraulic brakes in terms of response time. However, the technology has not yet matured. This article presents thermal analysis of MR brake (MRB) proposed for an e-bicycle in order to estimate the temperature rise of MR fluid on account of braking manoeuvre. The temperature of MR fluid in the brake is required to be within the operating range of the same. Details of FEA model of proposed MRB and analysis methodology have been presented. The transient analysis is based on IS brake fade test for two wheelers as well as real world cycle typifying Indian urban conditions. The analysis shows that the temperature of MRB remains within operating range of MR fluid and hence the brake satisfies the thermal requirements. The analysis findings have also been supported with experimental results.