HBS Overview

The HBS is meant for electrical vehicle integration, specifically for architectures that consider one electrical motor per wheel. It is a brake-by-wire system as it does not contain a hydraulic link between the brake pedal and individual wheel-braking actuators; instead it includes an electronic redundant bus system that allows for central and local-wheel control units to communicate.

Fig. 1 - HBS Overview


The system is termed "hybrid" as braking is assured by the cooperative effort of frictional Electromechanical Brakes (EMBs) and the In-Wheel Motors (IWMs) from the propulsion architecture. The use of the IWMs to brake gives one of the most interesting features of the HBS: while braking these electrical machines work as generators, transforming the kinetic energy from the wheels into electrical power that is fed to the vehicle's powertrain battery; the result is in an increase of the vehicle's range.