Study On Shift Quality Of Mild Hybrid Electric Vehicle Equipped With Automatic Manual Transmission

Hybrid electric vehicle is very feasible, economic and clean by congregating the advantages of conventional vehicle and electric ones. The performance of HEV is influenced by driver's driving habits if it is equipped with manual transmission. Using automatic transmission can reduced the difference between drivers in the same car efficiently. ISG motor can be used to give a support to meliorate the comfort of driving by improving the shift quality.This paper focus on the ISG type mild HEV equipped with AMT, considering about the shifting dynamic performance, driving comforts and parts'durability, have done some research described as following.â‘ The power source simulation model has been established to control it efficiently. The experiment data of engine and battery also has been analyzed to model them by interpolation and matching.â‘¡The shifting actuator structure and shifting process have been studied to estimate the shifting time. The complete vehicle simulation model has been established by combining the power source, clutch, transmission models and so on. Using this vehicle model, the simulation analyze about shift quality can be prosecuted to get the most quality infective process and factors.â‘¢Then the paper aimed at the factors and proposed an optimized control strategy by using ISG motor to reduce the rotating speed difference between clutch's plates to improve the shift quality.â‘£For the sake of feasibility and validity of this new strategy, a hardware-in-loop HEV test bench has been built based on dSPACE. The experiments results were analyzed contrastively and showed a consistency at a certain extent between experiments and simulation.All in all, this paper has done some research on ISG type mild HEV equipped with AMT, and provided basement of theory and testing for AMT sample vehicle research.