| 摘要 |
PURPOSE:To enable the easy opening of window glass to a desired extent via simple constitution without fitting any special switching mechanism by applying the constitution wherein a motor speed is reduced in an window glass opening operation when an automobile speed is increasing. CONSTITUTION:A motor speed calculator 11 in CPU for controlling a motor for lifting window glass for an automobile operates the current number of motor revolutions. Also, a window glass operation speed setting device 12 sets the target speed of the motor for a current automobile speed. Furthermore, a revolution number control device 13 sends a control signal 13a to a logical device 14 so that a difference between output values from the calculator 11 and the setting device 12 will be nil. On the other hand, an operation discriminator 10 judges the lift operation of the window glass, and upon detection of the occurrence of a lift demand signal 6a or AVTO signal 6c, sends a detected signal 10a to the logical device 14. And the logical device 14 makes the control signal 13a invalid upon occurrence of the detected signal 10a and sends the control signal 13a to a drive circuit D upon non-occurrence of the detected signal 10a, thereby making rotation control. When an automobile speed increases, therefore, it is possible to determine easily a window glass position with an operation switch A for opening the window glass to ventilate a cabin. |
