| APPLICATION OF A MODIFIED THERMOSTATIC CONTROL STRATEGY TO PARALLEL MILD HEV FOR IMPROVING FUEL ECONOMY IN URBAN DRIVING CONDITIONS |
| D. B. JUNG1, S. W. CHO1, S. J. PARK2, K. D. MIN1 |
1Seoul National University
2Hongik University |
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| ABSTRACT |
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A modified thermostatic control strategy is applied to the powertrain control of a parallel mild hybrid electric vehicle (HEV) to improve fuel economy. This strategy can improve the fuel economy of a parallel mild HEV by operating internal combustion engine (ICE) in a high-efficiency region. Thus, in this study, experiments of a parallel mild HEV were conducted to analyze the characteristics of the hybrid electric powertrain and a numerical model is developed for the vehicle. Based on the results, the thermostatic control strategy was modified and applied to the vehicle model. Also, battery protection logic by using electrochemical battery model is applied because the active usage of battery by thermostatic control strategy can damage the battery. The simulation results of the vehicle under urban driving conditions show that the thermostatic control strategy can improve the vehicle |
| Key Words:
Urban driving condition, Control strategy, Electrochemical battery model, Fuel economy, Hybrid electric vehicles |
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