| 摘要 |
PURPOSE:To improve controllability by determining driving priority order from signals for indicating the switchover of the driving objects of plural ultrasonic motor actuators and carrying out driving in accordance with the order. CONSTITUTION:The output signals of the position sensors 19, 21, 22 of an inside/ outside air switchover door 4 and an inside/outside air switch 23 for setting and switching over the inside/outside air switching door 4, and a mode switch 24 for setting a mode door 12 are inputted into a microcomputer 18. The microcomputer 18 provides priority order based on these inputted signals and outputs a control signal to a switchover circuit 26 to control so that the output signal of a driving signal generating circuit 25 is switched over and outputted to ultrasonic motor actuators 27a-27c in order. Thereby, the switchover circuit 26 drives each of the motor actuators 27a-27c in accordance with a defined order to carry out the opening/closing of the inside/outside air switchover door 4, an air mix door 8, and the mode door 12. By this structure, controllability can be improved. |
