Modeling And Simulation On Regenerative Braking System Of Hydraulic Hybrid Vehicle Based On AMESim-simulink

With environmental pollution and global energy shortages have becomeincreasingly prominent, hybrid vehicle attracts a universal attention of governments allover the world. Reasonable matching of the engine and the motor can make the engineworking in efficient region，which will improve the fuel economy of the vehicle.Compared with Hybrid-Electric Vehicle (HEV), hydraulic hybrid vehicle (HHV) has abetter fuel economy because accumulators can recover kinetic energy of the brakingvehicle more efficiently. Hydraulic components also have big advantages in price,reliability and easy maintenance，so HHV has a better market prospect while HEV stillhas many issues such as technical difficulties and high cost which can’t be resolved welltoday.Aiming at solving the problem of improving regenerative braking energy recoveryefficiency of the HHV，distributing regenerative braking force reasonably and ensuringthe braking security of the vehicle, hydraulic hybrid car is selected to study in this paper.Model of the vehicle and regenerative braking system is established in the simulationplatform of AMESim, dynamic performance of the key components and system issimulated and analyzed in the software. A new control strategy about coordinatedcontrol of regenerative braking and ABS suit for the condition of wheels locking isproposed, the regenerative braking strategy is established and analyzed inmatlab/simulink. The co-simulation results show that the strategy can improveefficiency of the braking energy recovery effectively under the premise of ensuringbraking safety, and lay the foundation of design and optimization for the regenerativebraking control system of HHV.Regenerative braking system and braking control strategy of HHV are study inthis paper，main researchs show as follow：①Regenerative braking system suiting for hydraulic hybrid passenger vehicle isconfirmed after analyzing characteristic of different HHV power train structure，hydraulic circuit of HHV regenerative braking system is designed，main parameters ofkey compoments in hydraulic regenerative braking system are calculated according tothe performance requirement of passenger vehicle.②Braking dynamics analysis of HHV is accomplished, different kinds of brakingcontrol strategy for HHV are compared and analyzed, a coordinated control strategy about regerative braking system and ABS system suiting for conditions of wheellocking is proposed in this paper according to the advantage of high power density ofHHV regenerative braking system.③Models of HHV which include ABS system、tyre、regenerative braking systemare built in the software AMESim to use its advantage of high-accuracy，dynamicperformance analysis is also accomplished in this software. The model of coordinatedregenerative braking control strategy is finished in simulik，braking performanceanalysis of the HHV is accomplished by AMESim-simulink co-simulation。④Braking process and and performance analysis of HHV is simulated underdifferent braking intensity and conditions，simulation results are analyzed and whichverify the effectiveness of regenerative braking control strategy.