Abstract: In order to achieve comprehensive vehicle safety, energy conservation and environmental protection, and break through the current isolated research on the clean energy vehicle and intelligent vehicle, a novel solution-intelligent hybrid electric vehicle (IHEV) is proposed, which integrates the advanced technologies of both clean energy vehicle and intelligent vehicle. Based on the presented IHEV, the adaptive cruise control(ACC) system with hybrid propulsion system is developed. The hierarchical control structure, which is integrated with double mode switch adaptive cruise control, multiple energy management, driving/braking system coordinate control, is proposed and applied to the vehicle control system. To obtain fast and accurate system response, in the top layer, the problem of driving systems’ dynamic characteristics during various hybrid driving modes is studied, and a double modes switch controller with 2 DOF model matching method based on real-time hybrid state feedback is designed. In the middle layer, with the aim of gaining the highest fuel efficiency and lowest emission, a rule based optimal internal combustion engine(ICE) torque and motor & battery efficiency control strategy is applied. In the bottom layer, the engine/motor coordinate control strategy and EVB-hydraulic /motor coordinate control strategy are studied and applied. The simulation and experiment are implemented then, and the results show that, with the hierarchical control structure, IHEV ACC system can not only improve vehicle safety and lower driving fatigue, but also optimal advanced fuel economy and emission performance.

Key words: Active safety, Adaptive cruise control, Hybrid electric vehicle, Intelligent vehicle