JPH04306389A - Controller of power window - Google Patents

Abstract

PURPOSE:To eliminate the complications of the opening and shutting of a window with manual operation for ventilation by providing an air-pollution sensor sensing smoke or actor inside a car and a window opening and shutting means opening the window when the sensor detects the smorke or the odor and shutting the window when the smoke or the odor is not detected by the sensor. CONSTITUTION:A mode change-over switch 23 is turned ON, and when a detection signal of an indoor smoke sensor 24 is inputted to a micro-computer 1, a detection level of the indoor smoke sensor 24 is compared with reference value set in advance. After that, when the detection level is higher than the reference value, a detection signal from an opening amount detection sensor 26 is compared with the reference value set in advance to decide a current opening amount of the window. Then, when the current opening amount of the window is not wider than the reference value, a window driving device 31 is driven to open the window.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power window control device that detects air pollution in a vehicle and automatically opens the window.

0002

2. Description of the Related Art The cabin of an automobile has a relatively small volume, and cigarette smoke quickly fills the cabin with the windows closed. Therefore, when smoking, it is common to open the windows slightly to ventilate the cabin. Power windows use a motor to open and close the window, but the passenger has to decide whether to open or close the window and manually operate the open/close switch. Ventilation when dirty requires operating an on/off switch each time, which is troublesome.

0003

SUMMARY OF THE INVENTION The present invention has focused on such problems and has been made with the object of providing ventilation automatically when the air becomes contaminated.

0004

[Means for Solving the Problems] In order to solve the above-mentioned problems, the present invention includes an air pollution sensor that detects smoke, odor, etc. inside a car, and a window that opens when this sensor detects smoke, odor, etc. The device also includes window opening/closing means that closes the window when smoke, odor, etc. are no longer detected. Further, a second air pollution sensor that detects smoke, odor, etc. outside the vehicle is provided, and a detection signal of the second air pollution sensor and a detection signal of the first air pollution sensor that detects smoke, odor, etc. inside the vehicle are combined. The window is opened when the amount of dirt detected by the first air dirt sensor is greater.

[0005]

[Operation] When the air pollution sensor detects dirt in the air, the window opens, and when dirt is no longer detected, the window closes. Ventilation is automatically performed without the need for troublesome switch operations. Additionally, by detecting dirt in the air inside and outside the car and opening the windows when the air inside the car is dirtier, the system prevents unnecessary ventilation and ensures proper ventilation.

[0006]

[Embodiment] Next, an embodiment shown in the drawings will be explained. Figure 1
is a block diagram of the main parts of the device, and FIG. 2 is a flowchart of the control procedure. Note that in a normal car, what actually moves when opening or closing is the window glass, but for the sake of convenience, we will refer to it as a "window" in the explanation. In the figure, numeral 1 is a microcomputer of the control section, which includes a CPU 11 that performs various calculations,
ROM1 that stores control programs and data
2. It is equipped with a RAM 13 etc. for temporarily storing necessary data. It should be noted that the microcomputer 1 can be used as it is if it is installed for purposes such as engine control by incorporating the procedures of the present invention into a program.

Reference numerals 21 and 22 are a well-known power window switch and wiper switch, respectively, and 23 is a mode changeover switch. By turning on the mode changeover switch 23, an auto mode for automatically opening and closing the window is selected. 24 is an indoor smoke sensor provided as a first air pollution sensor, 25 is an outdoor smoke sensor provided as a second air pollution sensor, and 26 is an opening detection sensor that detects the position of the window with a potentiometer. . The states of the switches 21 to 23 and the detection signals of the sensors 24 to 26 are input to the microcomputer 1, respectively.

Reference numeral 31 denotes a well-known window drive device equipped with a motor for opening and closing the window, which operates in response to manual operation of the power window switch 21.
This invention can also be used as is for automatically opening and closing windows. 32 is an air conditioner control device, and these devices 31 and 32 operate according to instructions from the microcomputer 1.

Next, the control procedure will be explained with reference to the flowchart shown in FIG. First, when an ignition switch (not shown) is turned on, the microcomputer 1 starts operating, and in step S1, signals from each switch and sensor are detected. Then, in step S2, it is determined whether or not the power window switch 21 has been manually operated, and if it has been operated, the process advances to step S3. In step S3, it is determined whether the power window switch 21 is operated in the open or close direction, and accordingly, the motor of the window drive device 31 is driven to move the window only during the period in which the power window switch 21 is operated. Detection sensor 26
The window position detected in step S1 is stored and the process returns to step S1.

Further, if the power window switch 21 is not operated in step S2, the process proceeds to step S4, where it is determined from the on/off state of the mode changeover switch 23 whether or not the auto mode is selected, and it is determined that the auto mode is not selected. If the current mode is set, the process returns to step S1 via step S5, and if the auto mode is selected, the process proceeds to step S11. In step S5, if the motor is being driven, it is stopped; if it is not being driven, it remains stopped. In step S11, the signals from the indoor smoke sensor 24 and the outdoor smoke sensor 25 are detected, and if at least one of them detects smoke, the process proceeds to step S12, where the detection levels of both sensors are compared and the signal from the indoor smoke sensor 24 is detected. If the level is high, the process advances to step S13; otherwise, the process advances to step S30.

In step S13, the detection level of the indoor smoke sensor 24 is compared with a preset reference value a, and if the detection level is higher than the reference value, the process goes to step S14, and if it is not higher, the wiper switch 2
2 is turned on, the process advances to step S20. Then, in step S20, if the current window opening amount is wider than the preset reference value b, step S20 is determined.
6, the motor is stopped, or left stopped and the process returns to step S1. If the window is not wide, the process proceeds to step S7, where the motor is operated in the direction of opening the window. If the wiper switch 22 is not turned on in step S14, the process proceeds to step S15, where the current window opening amount is compared with a preset reference value c. If the window is wider than the reference value, the process proceeds to step S5 and the motor is stopped, or the motor is left stopped and the process returns to step S1, but if it is not wide, the process proceeds to step S7 and the motor is operated in the direction of opening the window.

[0012] The above reference values b and c are such that b<c, and by following the steps from step S14 onwards, the opening of the window is reduced in case of rainy weather when the wipers are used.
Unless it's raining, the windows are controlled to open wide. In step S30, the detection levels of the indoor smoke sensor 24 and the outdoor smoke sensor 25 are compared, and if the indoor smoke sensor 24 has a lower level, there is no point in ventilation, so the process proceeds to step S8, and the motor is operated in the closing direction. and close the window. If the level of the indoor smoke sensor 24 is not low but almost the same, the process advances to step S6 and the motor is stopped, or the motor is left stopped and the process returns to step S1 to maintain the current state.

On the other hand, in step S11, the indoor smoke sensor 24
If neither of the smoke sensor 25 nor the outdoor smoke sensor 25 detects smoke, the process proceeds to step S40, where the current window opening amount is compared with the window opening amount memorized by the manual operation in step S3, and the window opening amount is determined to be wider than the memorized value. If so, the process proceeds to step S8 to operate the motor in the closing direction to close the window, and if not, the process proceeds to step S41. Then, it is determined whether the current window opening amount is narrower than the stored value, and if it is narrower, the process proceeds to step S9, where the motor is operated in the opening direction to open the window.
If this is not the case, that is, if it is substantially the same as the stored value, the process proceeds to step S10 and stops the motor, or the motor is left stopped and returns to step S1 to maintain the current state.

The above embodiment corresponds to claim 2, and the smoke inside and outside the car is detected and the windows are automatically opened when there is a lot of smoke inside the car, but only the smoke inside the car is detected. If the window is opened in this manner, it becomes an embodiment corresponding to the invention of claim 1. Further, in the embodiment, a smoke sensor is used as the air pollution sensor, but it is also possible to use a sensor that detects other pollution factors such as odor, or to use them together. In addition, in the embodiment, the amount of opening of the window is changed depending on whether it is rainy or not, but the amount of opening may be changed depending on the magnitude of the detection signal of the sensor, for example, and the inside/outside air switching mechanism is linked to allow the window to be fully opened. Sometimes this can be switched to outside air, or the air volume of the air conditioner can be changed at the same time. Furthermore, although the examples only describe opening and closing the windows, ventilation efficiency can be increased by opening diagonally diagonal windows, for example, the right window on the front side and the left window on the rear side at the same time. Can be done.

[0015]

[Effects of the Invention] As is clear from the above-described embodiments, the present invention is capable of opening and closing a window by detecting air pollution such as smoke or odor using an air pollution sensor, and closing the window when dirt is no longer detected. The operation is performed automatically. Therefore, there is no need to manually open and close the windows each time the air becomes dirty, and it becomes easy to maintain a good condition in the interior of the vehicle, which has a relatively small volume and tends to get dirty. In addition, by detecting air pollution inside and outside the car and opening the windows when the air inside the car is dirtier, automatic ventilation prevents pointless ventilation that would take in dirty air from outside. function can be properly demonstrated.

[Brief explanation of drawings]

FIG. 1 is a block diagram of an embodiment of the present invention.

FIG. 2 is a flowchart of a control procedure in the same embodiment.

[Explanation of symbols]

1 Control section 11 CPU 21 Power window switch 23 Mode changeover switch 24 Indoor smoke sensor 25 Outdoor smoke sensor 26 Opening amount detection sensor 31 Window driving device

Claims (2)

[Claims] 1. An air pollution sensor that detects smoke, odor, etc. inside a vehicle, and window opening/closing means that opens a window when this sensor detects smoke, odor, etc., and closes the window when smoke, odor, etc. is no longer detected. A power window control device comprising: 2. A second air pollution sensor that detects smoke, odor, etc. outside the vehicle is provided, and a detection signal of the second air pollution sensor and a detection signal of the first air pollution sensor that detects smoke, odor, etc. inside the vehicle are provided. 2. The power window control device according to claim 1, wherein the power window control device opens the window when the amount of dirt detected by the first air dirt sensor is greater than the amount of dirt detected by the first air dirt sensor.