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This two-part paper presents the development an ISG diesel hybrid power-train to provide a solution for the city transit buses. The ISG power-train which adopts the ISG parallel configuration which is inserted a thin but powerful motor between the engine and the flywheel is a compact and flexible power-train with high efficiency and sufficient power. The drive demand of Chinese typical city cycle...
This is the second part of the two-part paper to illustrate the control system design and multi-energy strategy, it is the key to fulfill the fuel economy target for ISG hybrid bus. Based on a hierarchical structure, the control system is developed with the HCU (hybrid control unit) as the central controller to coordinate the motor, engine and CAN communication protocol. The multi-energy control strategy...
This paper introduces the principles, construction and application of a novel real-time hardware-in-the-loop simulation (RT-HILS) platform. The RT-HILS consist of a PC to display the simulation result and calculate the model, a HIL board to generate the analogue signals and measure the output of the target ECU, and a USB-CAN card to implement CAN (controller area network) communication. Multi-thread...
The use of simulation packages is essential for software engineers to evaluate a specific control strategy or algorithm. This paper presents an energy management strategy development process of hybrid electric vehicles (HEV) to demonstrate the model-based development methodology. The control algorithms are modeled, simulated and optimized in the environment of Matlab/Simulink/Stateflow. A code generator,...
An adaptive algorithm for battery state of charge (SOC) estimation is presented in this paper to solve the critical issue of calculating the remaining energy of battery in hybrid electric vehicle (HEV). To obtain a more accurate SOC estimation value, both coulomb-accumulation and open-circuit voltage contributions are considered in this study. The extended Kalman filter (EKF) theory which has good...
In order to solve the key technology of electric vehicle (EV), a battery management system (BMS) is proposed here to settle the critical issues. The system includes several common modules: data acquisition unit, communication unit and battery state estimation model. Two additional management units are developed here, one is thermal management and the other is high voltage management which improve...
A turbocharged diesel engine dominated integrated starter generator (ISG) hybrid electric vehicle (HEV) is proposed. In order to achieve good fuel economy and low emissions performance, a cost function which is the function of fuel economy and emissions is defined and the optimal operation line (OOL) of engine is determined through selecting the minimal value of the cost function. The baseline based...
CAN communication between the hybrid vehicle controller and other controllers are very important to realize and implement a reliable control strategy. And the CAN communication protocol has to cooperate with the SAE J1939 protocol to communicate with the engine management system (EMS) and other components already exits which conform to SAE J1939. And because the HEV control system is a distributed...
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