A Control Strategy for Fuel Cell Hybrid City Bus

Abstract

Fuel Cell Hybrid Electric Vehicle has recently become one of the focuses in the development of electric vehicles. China has launched a large project-Fuel Cell City Bus. The City Bus is a series Fuel Cell hybrid electric vehicle. All the components of the power-train have their own Electronic Control Unit (ECU). They communicate with the Vehicle Control Unit (VCU) through the Controller Area Network (CAN). VCU is the core of the power-train, it makes decisions according to the information from the driver and other ECUs. The control strategy of the VCU is one of the key technologies. In this paper, the design of the control strategy is divided into two main modules and many blocks. Some of the blocks are presented in detail. The control strategy is tested and calibrated on the hybrid power-train test bench. The test results show that the control strategy can meet the request of the City Bus.