Optimal brake force distribution in motorcycle for straight-line braking

Abstract

Commercial motorcycles and scooters incorporate independent mechanisms for brake actuation. But due to the significant contribution of dynamic load transfer in the event of braking, there is a need to distribute brake force and apply this force combined instead of independent actuation. This paper presents an analysis of the available braking options and their effect on the stability of the motorcycle. A simple motorcycle model was developed in Simulink for analyzing the basic phenomenon that occurs during braking and considering the testing requirements as per the standard for straight-line braking. The braking maneuver is analyzed along with its effect on sprung and unsprung mass over the range of possible deceleration rates for independent braking (only front or only rear) and combined braking. Finally, the strategy for optimal distribution of braking force is applied and its effect on the suspension system is analyzed. It is found that with the application of the proposed brake strategy higher braking force and deceleration can be achieved along with reduced suspension travel compared to the independent braking strategy.