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International Journal of Automotive Technology > Volume 12(5); 2011 > Article
International Journal of Automotive Technology 2011;12(5): 763-768.
TORQUE CONTROL OF ENGINE CLUTCH TO IMPROVE THE DRIVING QUALITY OF HYBRID ELECTRIC VEHICLES
Hyun-Soo Hwang1, Dongho Yang2, Hyeonki Choi2, Hyunsoo Kim2, Sung-Ho Hwang2
1Korea Automotive Technology Institute
2sungkyunkwan university
ABSTRACT
As a powertrain for hybrid electric vehicles (HEVs), the automatic transmission (AT) is not only convenient for the driver but also reduces hybridization costs because the existing production line is used to produce the AT. However, it has low fuel economy due to the torque converter. To overcome this disadvantage, this paper studies HEVs equipped an AT without a torque converter. In this case, additional torque control is needed to prevent the driving quality from deteriorating. This paper suggests three different torque control methods and develops a simulator for an HEV that can simulate the dynamic behaviors of the HEV when the engine clutch is engaged. The HEV drive train is modeled with AMESim, and a controller model is developed with MATLAB/Simulink. A co-simulation environment is established. By using the developed
Key Words: Hybrid electric vehicle (HEV), Engine clutch, Driving quality, Drive shaft torque, Torque control, Engine control, Motor control
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