Abstract:

In this paper,first,the structure of the electro- hydraulic braking system was analyzed,and the advanta-ges and disadvantages of coupled and decoupled schemes were respectively compared.Next,the distribution strate-gy of the braking force loaded on the front- rear axle,the regenerative braking force and the hydraulic braking forcewas investigated,and three coordinated control schemes were proposed and compared.Then,based on the vehicleparameters and the test data,a co- simulation model of the electro- hydraulic braking system was constructed withSimulink- AMESim.Moreover,two indexes,namely the regenerative energy efficiency and the estimated consis-tence with the driver's intention,were defined to evaluate the coordinated control schemes.Finally,a simulation ofthe schemes was carried out under NEDC and SC03 driving cycles.The results show that the decoupled brakingscheme is superior to the coupled one in terms of regenerative energy efficiency and estimated consistence,and thatit helps to achieve a regenerative energy efficiency of more than 50% under both NEDC and SC03 driving cycles.

Key words: electric vehicle, decoupled scheme, electro- hydraulic braking system, regenerative energy efficiency