Coordination of data sensors with the use of a time synchronisation in a controller area network system with a plurality of buses

摘要

It is a method is provided in order for the time in a not synchronized controller area network system of a motor vehicle to synchronize. A master control unit receives a global time of a time synchronization source. The main control unit estimates a respective time delay in the transmission of messages by means of electronic control units on each controller area network. The time delay is a difference between a point in time at which a message from a respective electronic control unit for transmission on a respective controller area network bus is produced, and a point in time at which the message on the respective controller area network bus is transmitted. The global time, for each respective controller area network bus on the basis of the estimated time delays adjusted, the associated with each respective controller area network bus are. Global time messages from the main control unit are transmitted to each electronic control unit, which the adjusted global times for an associated controller area network bus contain.