Abstract: Control system has significant influence on Hybrid Electric Vehicles (HEV) acceleration performance, drivability and reliability. In order to ensure system reliability and safety, an elaborate test was done for different performance indexes in the process of system development. Though software-based test has some advantage in testing process and flexibility, it is only able to achieve logical verification on basic function of control strategy. Besides, it does not take into account of the effect of controller hardware, and has some limitation in real-time testing. Instead, hardware-in-the-loop (HIL) can overcome these shortages, can test systematically for controller. HEV test environment was built for hybrid control unit (HCU) based on RT-LAB platform. Matlab-in-the-loop (MIL) test and HIL test was carried out respectively. The test results show HIL has realistically reflect control effect of HCU.

Key words: HIL, HEV, testing system, RT-LAB