| 摘要 |
PURPOSE:To improve the accuracy in controlling blow-off temperature by configurating a device in such a way that both No.1 and No.2 target openings are set based on thermal load, and then a detected opening is compared with either No.1 or No.2 target opening depending on either an increasing or a decreasing trend of thermal variation so as to control the opening. CONSTITUTION:Signals from an opening detector 13 for an air mix door 10, and for cabin temperature 14, solar radiation 15, outside temperature 16, and set temperature 17 are outputted into a microcomputer 12. Based on these signals, the microcomputer 12 operates thermal load first and operates such items as No.1 target opening, No.2 target opening, and thermal load variation which meet the above said thermal load. If the thermal variation tends to decrease, an opening 13 is compared with No.1 target opening which has been set to be higher than the characteristic line indicating the standard opening of the air mix door 10. If the thermal variation tends to increase, the opening is compared with No.2 target opening which has been set to be lowerer than the characteristic line. Then, the drive control of a mix door actuator 11 is effected based on the resultant of the comparison as described above. This configuration improves the accuracy in controlling blow-off temperature. |
