| 摘要 |
PURPOSE:To make a temperature adjustable range enlargeable, by finding the estimated blowoff temperature from temperature data at the upstream side of a heater core and opening data of an air mix door, while comparing it with the specified blowoff temperature and limiting the door opening to some extent. CONSTITUTION:A temperature operational device 47 inputs temperature TE at the upstream side of a heater core 9 by a temperature detecting device 17 and opening theta of an air mix door 16 by an opening detecting device 33, and finds the estimated blowoff temperature TF from an equation of TF=TE+Ktheta+D with compensation data K and D. And, an opening limit judging device 49 compares the temperature TF with the specified blowoff temperature on the basis of output out of a temperature operating device 47 and judges whether opening of the air mix door 16 is necessary to be limited or not, and according to the judged result, a controlling device 48 controls the opening of the door 16. Therefore, even if blowing temperature varies to some extent, the same blowoff temperature is maintainable all the time, thus a temperature adjustable range is enlargeable. |
