Nedunuri, K., Patnaik, V., Lalasure, S., Rajakumar, K. et al., "Vehicle Sway Prediction in Hydraulic Circuit Failed Condition on 4 Wheeled Vehicle with ‘X’ Split Brake Configuration," SAE Technical Paper 2017-26-0344, 2017, doi:10.4271/2017-26-0344.
A 4 wheeled vehicle with X-split brake configuration, in hydraulic circuit failed condition will have a behavior of induced sway due to braking force variation in the front and rear diagonally. With increasing vehicle speed, engine power & customer expectations, the situation becomes more critical and challenging in designing a brake system which caters in meeting the homologation requirement at an expense of vehicle sway within controllable limits of driver / customer.This paper proposes a novel approach & methodology to overcome the above situation by predicting the effect of brake force distribution variation on the vehicle swaying behavior during circuit failed braking condition. This study will quantify vehicle sway, caused due to imbalance in brake force distribution during a circuit failed braking event on X Split configuration vehicles. This study will also aid in forecasting the vehicle sway capacity of a given vehicle and do necessary corrective design amendments to reduce the sway behavior during initial development phase of system / vehicle.It briefly discusses on a case study about most feasible solution to reduce the vehicle sway by altering the brake force distribution in circuit failed condition alone, without having any change in brake force distribution during service brake condition without altering any vehicle architecture / parameters. It also provides good correlation on sway tendency through actual vehicle testing.