MULTIPLEX COMMUNICATION SYSTEM IN HYBRID VEHICLE

摘要

PROBLEM TO BE SOLVED: To prevent errors in data transmission caused by noises generated at an inner or outer part of a hybrid vehicle. SOLUTION: A multiplex communication bus 200 has two-system signal lines, such as a first signal line 200a and a second signal line 200b. A communication controller 105 controls the output of a transmission unit for each electronic control unit(ECU) in such a way that the signal level on the first signal line 200a and the signal level on the second signal line 200b are opposite in relation with respect to a reference signal level. In addition, a differential between the signals from two-system signal lines 200a and 200b is taken to prevent errors in recognition of data.