Research on Vehicle Control Unit based on functional safety

In recent years, the number of electronic controllers are equipped in vehicle is on the rise. The reliability requirements for vehicle active safety controller are higher and higher, such as VCU (Vehicle Control Unit) and ABS (Antiskid Brake System). The vehicle must enter the security status that ensures vehicle running at a safe mode, even if the vehicle breaks down. If we want to develop a VCU which is based on functional safety, the most important thing is to design a VCU system architecture which is consistent with functional safety. This paper designs the VCU system architecture that is in accordance with function safety and meets the function safety requirements. It contains a double MCU redundant mechanism, a CAN communication diagnosis mechanism and a signal acquisition mechanism. The safety architecture gives a new scheme with plans and ideas for high safety VCU in the future.