Bus system analysis: FlexRay

With a maximum data transfer rate of 10 MBit/s per channel, FlexRay is significantly faster than the data buses employed so far in the areas of body and powertrain/suspension in motor vehicles. The central gateway module sets up the link between the various bus systems and the FlexRay. Depending on the equipment fitted in the vehicle, the ZGM has one or two so-called star couplers, each with four bus drivers. The bus drivers forward the data of the control units across the communication controller to the central gateway module (ZGM). The deterministic data interchange ensures that each message is transferred in the time-controlled section in real time. Real time means that the transmission takes place in a specified time.