A control strategy for braking energy distribution and regenerative braking in a 4WD hybrid electric vehicle

Based on the braking theory of conventional vehicles and high efficient energy recovery and security braking,a control strategy for braking energy distribution and regenerative braking of a 4WD hybrid electric vehicle was proposed.Considering limiting factors,such as motor and battery efficiency,a simulation model of a regenerative braking system was built and a simulation of typical braking conditions was conducted.The simulation result shows that the highest energy recycle ratio can reach 87.5%,47.8%,and 28.6% when z is 0.1,0.3,and 0.5,respectively,at 30 km/h.The control strategy for braking energy distribution and regenerative braking can satisfy demand for vehicle braking and obtain high regenerative energy.