| 摘要 |
<p>A control unit takes in a set temperature, a vehicle-internal temperature, an ambient temperature, an engine-water temperature, an sun load and a vehicle speed from a means for setting a temperature of the air inside a vehicle and sensors (S1). The control unit determines whether a failure has occurred in the internal-air-temperature sensor and the external air temperature sensor respectively (S2, S3). If a failure is determined in any of the sensors, the control unit fetches a substitute value registered in advance in the substitute-value table (S10, S11). Then, the flow of the procedure goes on to a step S4 and an outlet temperature and as well as a difference between the vehicle-internal temperature and the set temperature are found from the signals generated by the sensors, and a driving voltage of the FAN motor and switching position of the outlet flap is computed (S5, S6). Then, the control unit determines whether a failure has occurred in any of the internal-air-temperature sensor and the external air temperature sensor (S7). If a failure is determined, the flow of the procedure goes on to a step S9 at which an opening of the air-mix flaps is found. <IMAGE></p> |
