Vehicle stability control for a 4 wheel drive hybrid electric vehicle is investigated using the regenerative braking of the rear motor and electro-hydraulic brake. A fuzzy rule based control algorithm is proposed, which generates the direct yaw moment to compensate the errors of the sideslip angle and yaw rate. Performance of the stability control logic is evaluated for ISO lane change. It is found from the simulation results that the regenerative braking at the rear motor is able to provide improved stability compared with the vehicle performance without any control. It is found that better performance can be achieved by applying the regenerative braking plus the electro-hydraulic brake (EHB) control. In addition, the optimal distribution ratio of the EHB force is presented to minimize the EHB power consumption. The simulation results show that the required torque level by the optimal EHB distribution ratio control is much lower than that of the fixed distribution ratio while providing the almost same control performance. It is expected that the vehicle stability control algorithm suggested in this study is able to offer an additional improvement of the fuel economy owing to the regenerative braking as well as the improved vehicle stability.
Vehicle stability enhancement control for a 4WD hybrid electric vehicle
Verbesserung der Fahrzeugstabilitätsregelung für ein Hybridelektrofahrzeug mit Vierradantrieb
2005
13 Seiten, 10 Bilder, 10 Quellen
Aufsatz (Konferenz)
Datenträger
Englisch
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