Vehicle-cooling-fan control system and control method therefor

摘要

A fault in a fan motor is detected on the vehicle side with simple wiring. Provided is a vehicle-cooling-fan control system including a fan control unit having a motor control unit that controls a three-phase motor for driving a cooling fan, a vehicle-side ECU that is provided superordinate to the fan control unit and that controls a vehicle, and an air-conditioning-system ECU that controls an air-conditioning apparatus of the vehicle, wherein the fan control unit, the vehicle-side ECU, and the air-conditioning-system ECU are connected so that information can be transferred therebetween via a vehicle network CAN, the fan control unit outputs fault information via a CAN driver in the case where a fault has been detected at a switching device, and the vehicle-side ECU exercises control via the vehicle network CAN to protect the fan control unit and the air-conditioning-system ECU in the case where the importance of the fault information is high.

主权项

1. A vehicle-cooling-fan control system comprising a fan control unit having a motor control unit that controls a three-phase motor for driving a cooling fan to supply air to an on-board heat exchanger, a first control unit that is provided superordinate to the fan control unit and that controls a vehicle, and a second control unit that controls an air-conditioning apparatus of the vehicle,
wherein the fan control unit, the first control unit, and the second control unit are connected to each other via a vehicle network so as to allow transfer of information therebetween, wherein the fan control unit outputs fault information via the vehicle network in a case where a fault has been detected at a switching device provided in the motor control unit, and wherein the first control unit exercises control via the vehicle network to protect the fan control unit and the second control unit in a case where the obtained fault information indicates a fault having a high importance.