The rising number of electronic control units (ECUs) in vehicles and the decreasing time to market have led to the need for advanced methods of calibration. A multi-ECU calibration system was developed based on the ex...The rising number of electronic control units (ECUs) in vehicles and the decreasing time to market have led to the need for advanced methods of calibration. A multi-ECU calibration system was developed based on the explicit calibration protocol (XCP) and J1939 communication protocol to satisfy the need of calibrating multiple ECUs simultaneously. The messages in the controller area network (CAN) are defined in the J1939 protocol. Each CAN node can get its own calibration messages and information from other ECUs,and block other messages by qualifying the CAN messages with priority,source or destination address. The data field of the calibration message is designed with the XCP ,with CAN acting as the transport layer. The calibration sessions are setup with the event-triggered XCP driver in the master node and the responding XCP driver in the slave nodes. Mirroring calibration variables from ROM to RAM enables the user to calibrate ECUs online. The application example shows that the multi-ECU calibration system can calibrate multiple ECUs simultaneously,and the main program can also accomplish its calculation and send commands to the actuators in time. By the multi-ECU calibration system,the calibration effort and time can be reduced and the variables in ECU can get a better match with the variables of other ECUs.展开更多
IVECO都灵V型汽车改装为ISG混合动力汽车过程中,需要在原车基础上增加一套ISG电机及其控制器构成的电力驱动系统。因此,ISG电机控制器与原车其他部件控制器构成了混合动力汽车分布式控制系统,而现场总线技术是分布式控制系统的关键技术...IVECO都灵V型汽车改装为ISG混合动力汽车过程中,需要在原车基础上增加一套ISG电机及其控制器构成的电力驱动系统。因此,ISG电机控制器与原车其他部件控制器构成了混合动力汽车分布式控制系统,而现场总线技术是分布式控制系统的关键技术。在分析SAE J1939 CAN(Controller Area Net)通信协议的基础上,制订了ISG控制器CAN通信协议,然后对ISG控制器的硬件电路和软件进行了模块化设计。展开更多
文摘The rising number of electronic control units (ECUs) in vehicles and the decreasing time to market have led to the need for advanced methods of calibration. A multi-ECU calibration system was developed based on the explicit calibration protocol (XCP) and J1939 communication protocol to satisfy the need of calibrating multiple ECUs simultaneously. The messages in the controller area network (CAN) are defined in the J1939 protocol. Each CAN node can get its own calibration messages and information from other ECUs,and block other messages by qualifying the CAN messages with priority,source or destination address. The data field of the calibration message is designed with the XCP ,with CAN acting as the transport layer. The calibration sessions are setup with the event-triggered XCP driver in the master node and the responding XCP driver in the slave nodes. Mirroring calibration variables from ROM to RAM enables the user to calibrate ECUs online. The application example shows that the multi-ECU calibration system can calibrate multiple ECUs simultaneously,and the main program can also accomplish its calculation and send commands to the actuators in time. By the multi-ECU calibration system,the calibration effort and time can be reduced and the variables in ECU can get a better match with the variables of other ECUs.
文摘IVECO都灵V型汽车改装为ISG混合动力汽车过程中,需要在原车基础上增加一套ISG电机及其控制器构成的电力驱动系统。因此,ISG电机控制器与原车其他部件控制器构成了混合动力汽车分布式控制系统,而现场总线技术是分布式控制系统的关键技术。在分析SAE J1939 CAN(Controller Area Net)通信协议的基础上,制订了ISG控制器CAN通信协议,然后对ISG控制器的硬件电路和软件进行了模块化设计。
