EOL Solution For Electronic Controlled Diesel Common Rail System

Electronic controlled diesel common rail system (DCRS) is regarded as the most promising Technology in the diesel field. As for the fuel economy, power safety and environmental protection, DCRS is more and more popular with the automobile industry.Interiorly, FAW Wuxi Fuel Injection Equipment Research Institute and Zhejiang University have jointly development DCRS which owns complete-independence intellectual property rights. At present, this system is confronted with a series of technologies for industrialization. In this paper a solution is brought up and it meets the specific requirements of the system industrialization.As a key technology of the DCRS, EOL solution includes the download management of programs and basic data, the development of the discrete characteristic data, realization of communication, diagnosis and calibration functions.The programs and the basic data are downloaded based on the CAN Bootloader of the XC167 microcontroller. The CAN Bootloader takes advantage over serial bootloader on both the speed and anti-jamming performance. In this paper, a detailed development is described. In addition, the development of USB-CAN bus interface exchange is also introduced.An EOL flow together with related database designing is given according to the demands of DCRS industrialization. In this paper, trims for compensating fuel injectors and some key sensors are discussed. Furthermore, the power calibration is introduced as well as related arithmetic and calibration flow.As a popular and high-performance protocol, J1939 is adopted as the communication protocol for the purpose of EOL specific calibration and diagnosis. The paper describes the architecture of the J1939 development and the brief development of the diagnostic layer. After that, the realizations of EOL function as downloading system specific data, specific data calibration, and the system diagnosis are developed and described.The research and development of EOL solution and related systems resolve many technical problems as code download, database management, calibration and diagnosis, etc. This satisfies the EOL managements for the electronic controlled unit, and it paves the way for the industrialization of the DCRS.