Simulation Research On HEV Regenerative Braking And ABS Coordinated Control

Energy saving and environmental protection is the theme of the world nowadays, people hope to improve their quality of life by improving the environment. In recent years, the fog haze, PM2.5((particulate matter) gradually become the topic of discussion. However, people begin to focus on the vehicle exhaust. Pure electric vehicles doesn’t have emissions, however, short mileage, high price and short battery life limit its development.Hybrid electric vehicle uses the traditional internal combustion engine and battery to drive the vehicle, its mileage is relatively long and can reduce the emission of exhaust. Braking energy recovery is a characteristic of hybrid electric vehicle. however, the addition of regenerative motor will certainly affect the braking force distribution of the vehicle, then affect the braking safety and stability of the vehicle. Now anti lock brake system(ABS) is widely used, regenerative braking and ABS will control vehicle together. But the motor and ABS may have the contradiction, even lock the wheels.In order to ensure the braking stability and safety of vehicle, recycle braking energy as far as possible and solve the contradiction of the regenerative braking and ABS, this paper has carried on the following several aspects of work:First, through the analysis braking force distribution of traditional car and HEV, this paper determines the range of braking force distribution and the peak torque of motor, then establishes HEV braking force control strategy based on ECE braking regulations.Second, in order to solve the contradiction of regenerative braking and ABS, this paper based on logic threshold control strategy set two threshold and control signal in advance, then establish a integrated control strategy of regenerative braking and ABS.Finally, based on the MATLAB / Simulink environment, this paper establishes the braking force distribution model and imitate through the ADVISOR software. Simulation results show that the strategy can not only ensure the braking stability and security but also recycle more braking energy, reduce emissions and fuel consumption. It also solved the contradiction between regenerative braking and ABS.