Design Of MR Fluid Base Brake System For Motorcycle

Azmir, Mat Zain (2010) Design Of MR Fluid Base Brake System For Motorcycle. Project Report. UTeM, Melaka, Malaysia. (Submitted)

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Abstract

Conventional hydraulic brake (CHB) systems used in automotive industry have several limitations and disadvantages such as the response delay, wear of braking pad, requirement for auxiliary components (e.g. hydraulic pump, transfer pipes and brake fluid reservoir) and increased overall weight due to the auxiliary components. In this project, the development of a novel electromechanical brake (EMB) for automotive applications is presented. Such brake employs mechanical components as well as electrical components, resulting in more reliable and faster braking actuation. The proposed electromagnetic brake is a magnetorheological (MR) brake. The MR brake consists of multiple rotating disks immersed into an MR fluid and an enclosed electromagnet. When current is applied to the electromagnet coil, the MR fluid solidifies as its yield stress varies as a function of the magnetic field applied by the electromagnet. This controllable yield stress produces shear friction on the rotating disks, generating the braking torque. This type of braking system has the following advantages: faster response, easy implementation of a new controller or existing controllers (e.g. ABS, VSC, EPB, etc.), less maintenance requirements since there is no material wear and lighter overall weight since it does not require the auxiliary components used in CHBs. The design process was started with an analytical model of the proposed MRB. Then, the MRB was designed with a focus on concept of BMX bicycle steering front and rear system, additional disc attachment, working surface area, MR fluid selection and applied current. Disadvantage of MR brake is the brake torque of MR brake produced is not enough to generate the brake torque of motorcycle. Therefore, an improved MR brake will be designed with an increased number of discs and value of current applied and modified the outer and inner radius of disc.

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