This master’s Thesis is part of a project on the modelling and validation of a magneto-rheological fluid brake developed by the IEHV - Innovative Electric and Hybrid Vehicles - Research Group. It’s based on the modelling and validation of a magneto-rheological fluid brake. It is a continuing of the thesis work of I. Giovanni Numerous constraints and negative aspects apply to conventional hydraulic brake (CHB) systems used in the automotive industry, including response delay, braking pad wear. The requirement for auxiliary components (such as hydraulic pump, transfer pipes, and brake fluid reservoir), and increased overall weight because of the auxiliary components.