Vehicle control device capable of controller area network communication and diagnostic method therefor

摘要

The present invention relates to a vehicle control device that is communicably connected to other control devices so that controller area network (CAN) communication can be performed through a communication bus and a diagnostic method thereof. The vehicle control device includes a CAN data transmission unit that can generate and transmit CAN data, a transmission stop unit that stops transmission of the CAN data transmitted from the CAN data transmission unit to the communication bus when a transmission stop signal is inputted, an abnormality detection unit that outputs the transmission stop signal to the transmission stop unit when detecting an abnormality in the vehicle control device, and a diagnostic unit that causes the abnormality detection unit to output the transmission stop signal regardless of the detection of abnormality, causes the CAN data transmission unit to transmit the CAN data, and diagnoses a transmission stop function that stops the transmission of the CAN data to the communication bus on the basis of a result of comparison between the transmitted CAN data and data on the communication bus.

主权项

1. A vehicle control device that is communicably connected to other control devices so that controller area network communication can be performed through a communication bus, the vehicle control device comprising:
a controller area network data transmission unit that can generate and transmit controller area network data; a transmission stop unit that stops transmission of the controller area network data transmitted from the controller area network data transmission unit to the communication bus when a transmission stop signal is inputted; an abnormality detection unit that outputs the transmission stop signal to the transmission stop unit when detecting an abnormality in the vehicle control device; and a diagnostic unit that causes the abnormality detection unit to output the transmission stop signal regardless of detection of abnormality in the vehicle control device, causes the controller area network data transmission unit to transmit the controller area network data, and diagnoses a transmission stop function that stops the transmission of the controller area network data to the communication bus on the basis of a result of comparison between the transmitted controller area network data and data on the communication bus based on the presence or absence of a bit error in a start-of-frame area, wherein the diagnostic unit determines that the transmission stop function is normal when a bit error occurs in the start-of-frame area, and determines that the transmission stop function is abnormal when a bit error does not occur in the start-of-frame area.