JP2000073655A - Driving controller for power window - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the excess heat generation of a motor, and to obviate the stoppage of the motor as a foreign matter is left as it is pinched. SOLUTION: When the pinching of a foreign matter is sensed, the movement of a window pane is not stopped even when a temperature sensing element (PTC) 6 is at off, and the window pane is moved in the opening direction preferentially for preventing pinching. That is, when the temperature sensing element 6 is at off and reaching a fixed temperature or higher of the atmospheric temperature of a motor 1 for driving from the input potential of an IN1 for a control circuit 2 is detected, a relay switch 3b and a relay switch 4b are left as the relay switch 3b is at off and the relay switch 4b is at on for a period up to the completion of pinching treatment and the movement of the window pane is not stopped during pinching. The shifting of the window panel must be stopped for preventing the excess heat generation of the motor 1 for driving, but the motor is not burnt by the motor driving of a little moving extent in the opening direction for obviating pinching.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power window drive control device capable of preventing a human body or the like from being pinched.

[0002]

2. Description of the Related Art Conventionally, in order to prevent abnormal heating during motor operation, a heat protection sensor (for example, a PTC (Positive Thermal Co.)
efficient) or a bimetal switch), cuts off the current to the motor when the sensor temperature rises and reaches a predetermined temperature with the start of the current to the motor, stops the motor operation, and causes the motor to generate more heat. To prevent FH from happening.

On the other hand, in recent years, when a foreign object such as a part of a human body is trapped during a closing operation of a power window or a sliding roof driven by a motor on a window glass of an automobile, the operation is switched from the closing operation to the opening operation. Those with a pinch prevention function have become widespread. The motor used in the power window system with the pinch prevention function is also provided with a heating protection sensor for preventing the abnormal heating described above inside the motor.

[0004]

However, if a problem occurs in the middle of the foreign object and the motor stops while the foreign object is being inserted, for example, if the heating protection sensor is activated while the foreign object is being inserted. Such a state may occur because the power supply to the motor is cut off.

In such a case, it is conceivable to eliminate the heating protection sensor, estimate the temperature from the number of times of operation, etc., and do not stop the motor if there is a danger of burnout. Atmospheric temperature, addition to the motor, drive voltage, variations in torque characteristics, and the like affect, and it is difficult to obtain a reliable estimated value, which is not preferable. The present invention has been made in view of the above problems, and has as its object to provide a drive control apparatus for a power window that can prevent excessive heat generation of a motor and that does not stop a motor while foreign substances are interposed.

[0006]

In order to achieve the above object, the following technical means are employed. According to the first aspect of the present invention, when the entrapment of the foreign matter is detected,
Even if any problem occurs, the movement of the windowpane in the opening direction by the pinch prevention means is preferentially performed over the stoppage of the movement of the windowpane by the movement stop means.

As described above, the movement of the windowpane is stopped during the sandwiching operation by prioritizing the movement of the windowpane by the sandwiching prevention unit, rather than stopping the movement of the windowpane by the movement stopping unit. You can avoid it. When a problem occurs, the movement of the window glass must be stopped in order to prevent excessive heat generation of the motor.However, if the motor is driven only slightly in the opening direction to prevent pinching, the motor will burn out. Nothing to do.

The movement stopping means stops the opening and closing movement of the window glass by the motor when the motor is overloaded. A device for stopping the opening and closing movement of the window glass when the ambient temperature near the motor is equal to or higher than a predetermined temperature, when the motor is overloaded, or when the ambient temperature near the motor is higher than a predetermined value. If the temperature is equal to or higher than the temperature, a motor that stops the opening and closing movement of the window glass by the motor can be adopted.

According to a fifth aspect of the present invention, a bypass circuit is provided in parallel with the movement stopping means, and when a foreign object is detected, the movement is stopped even at a predetermined temperature or higher through the bypass circuit. The invention is characterized in that the movement of the windowpane in the opening direction by the pinch prevention means is preferentially performed over the stoppage of the movement of the windowpane by the means.

As described above, the bypass circuit is connected in parallel to the movement stopping means, and the movement of the window glass in the opening direction can be preferentially performed through the bypass circuit, rather than the movement stop of the window glass by the movement stopping means. Can be. Thereby, the movement of the window glass can be prevented from being stopped during the sandwiching.

[0011]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing a first embodiment of the present invention. (First Embodiment) FIG. 1 shows a circuit configuration diagram of a drive control device of a power window for a vehicle to which one embodiment of the present invention is applied.

The power window drive control device includes a drive motor 1 for opening and closing a window glass, and a control circuit 2 for controlling the drive motor 1. The control circuit 2 is composed of a microcomputer or the like, and the power window switch UP, D (not shown)
The UP signal or the DOWN signal is input by the DOWN operation. And UP signal and DOW
A signal for moving the window glass in the closing direction (hereinafter referred to as rising) or a signal for moving the window glass in the opening direction (hereinafter referred to as falling) in response to the N signal is output from OUT1 and OUT2. A signal for stopping power supply to the driving motor is output from OUT3.

The control circuit 2 includes a first relay circuit 3, a second relay circuit 4, and a third relay circuit 5 that perform on / off operations based on each signal.
These first to third relay circuits 3 to 5 are provided with transistors 3a, 4a and 5a, respectively, and the connection of each relay 3b, 4b and 5b is switched by sending a signal to the transistor (energizing the transistor). It is configured to be able to do it.

The relay 3b has a power window UP, D
The connection between one end of the drive motor 1 for performing OWN and the power supply B or the ground potential is switched, and the relay 4b is configured to switch the connection between the other end of the drive motor 1 and the power supply B or the ground potential. Have been. The relay 4b is connected to the power supply B
For switching the connection between the power supply B and the first and second relay circuits 3 and 4. When a problem occurs, for example, the driving motor 1
Is configured to stop applying voltage to the drive motor 1 when an overload is applied to the motor.

Hereinafter, the case where the relays 3 to 5 are connected to the power supply B side is turned on, and the case where the relays 3 to 5 are connected to the ground potential side is turned off. In the vicinity of the driving motor 1, between the common terminal 3c of the relay 3b and the driving motor 1, the power supply B is connected to the resistor R1,
A temperature detecting element 6 made of PTC or bimetal is provided so as to connect between the portions divided by R2. The potential at the site divided by the resistors R1 and R2 is input to IN1 of the control circuit 2. The temperature detecting element 6 performs a switching operation when the ambient temperature becomes equal to or higher than a predetermined temperature, thereby changing the potential level of the terminal IN1 and detecting a case where the driving motor 1 is overloaded or high temperature. . The PTC has a very low resistance value at a predetermined temperature or higher, and turns off the circuit by rapidly increasing the resistance value at a predetermined temperature or higher.
The bimetal is made of, for example, two kinds of materials having different coefficients of thermal expansion bonded to each other. When the temperature reaches a predetermined temperature or higher, the contact is turned off by warpage due to the difference in the coefficient of thermal expansion.

Further, a motor rotation pulse accompanying the rotation of the motor is input to the control circuit 2, so that the moving speed of the window glass accompanying the rotation of the motor can be detected based on the motor rotation pulse. ing. Further, the control circuit 2 supplies a detection signal L indicating the actual position of the window glass.
S is input. And the control circuit 2
Then, it is detected whether or not the window glass is at the upper end position (a position where the window glass is closed) by the detection signal LS, and if the window glass is rising and the window glass is not at the upper end position, The rising speed of the window glass is detected based on the motor rotation speed, and if the rising speed of the window glass is not higher than a predetermined value, it is determined that the window glass has caught foreign matter. When such a pinch determination is made, the control circuit 2 generates a signal for reversing the moving direction of the window glass and lowering the window glass.

The basic operation of the power window drive control device configured as described above will be described. The state of each element in this basic operation is shown in FIG. 2 and will be described with reference to FIG. First, a case where the driving motor is not in a high temperature or overloaded state (FIGS. 2A to 2D) will be described.

FIG. 2A shows a case where the window glass is not moved. In this case, the control circuit 2 outputs OUT1,
OUT2 outputs a low level (L) signal, and relay 3
b, 4b are turned off, and the drive motor 1 is stopped. At this time, since the temperature detection element 6 is in the ON state,
The input potential of IN1 of the control circuit 2 becomes low level. FIG. 2B shows a case where the window glass is raised. In this case, the control circuit 2 outputs a high-level (H) signal from OUT1, a low-level signal from OUT2, and a high-level signal from OUT3, turns on the relay 3b, turns off the relay 4b, and turns on the relay 5b. The driving motor 1 is driven in the rotation direction for raising the window glass. At this time, the power supply B is supplied from the control circuit 2
1, the input potential of IN1 becomes high level.

FIG. 2C shows a case where the window glass is lowered. In this case, the control circuit 2 outputs a low-level signal from OUT1, a high-level signal from OUT2,
3, a high level signal is output, the relay 3b is turned off, the relay 4b is turned on, the relay 5b is turned on, and the driving motor 1 is driven in the rotating direction for lowering the window glass. At this time, since the temperature detection element 6 is on, the input potential of IN1 of the control circuit 2 becomes low level.

FIG. 2 (d) shows a case where normal operation is not performed, but a case where both the UP signal and the DOWN signal are input due to a failure of the UP / DOWN switch. In this case, the control circuit 2 turns on both the relays 3b and 4b to equalize the potentials at both ends of the driving motor 1 so that the driving motor 1 is not driven. At this time, the power supply B is applied to IN1 of the control circuit 2 via the driving motor 1, so that the input potential of IN1 becomes high level.

A case where the driving motor is in a high temperature or overloaded state (FIG. 2E) will be described. In this case, since the temperature detecting element 6 is turned off, the input potential of IN1 of the control circuit 2 becomes the middle level (the divided potential of the resistors R1 and R2) as shown in FIG. For this reason, the relays 3b to 4b are turned off irrespective of the state of the other elements, and the energization to the drive motor 1 is stopped. That is, during the inversion DOWN, the relays 3b to 4b are turned off after the window glass is stopped.

Next, the processing executed by the control circuit 2 when performing the above basic operation will be described with reference to the flowcharts of the power window driving processing shown in FIGS. The power window driving process is executed according to the flowchart shown in FIG. First, in step 101, it is determined whether or not the input potential of IN1 of the control circuit 2 is at a middle level. If Yes, the process proceeds to step 102, in which a high-level signal is output from OUT3 to turn on the transistor 5b to connect the first and second relay circuits 3, 4 and the power supply B, and the process proceeds to step 103. Also, No
If this is the case, it means that some problem has occurred, so the process proceeds to step 112 to output a low-level signal from OUT1 to OUT3 and cut off the relays 3b to 5b in order to cut off the connection with the power supply B.

In step 103, the occupant makes a DOWN
It is determined whether or not the switch is turned on, that is, whether or not the DOWN signal is being input. If Yes, the process proceeds to step 104, in which the relay 3b is turned off and the relay 4b is turned on as shown in FIG. Step 105
Then, it is determined whether or not the input potential of IN1 of the control circuit 2 is at a low level. If Yes, it is in a normal state and returns to Step 101. If No, some abnormality has occurred and the process goes to Step 112 to turn off the relays 3b to 5b.

On the other hand, if No in step 103, the flow advances to step 106 to determine whether or not the UP switch is turned on. If yes, step 10
Then, as shown in FIG. 2B, the relay 3b is turned on and the relay 4b is turned off as shown in FIG. At step 108, the I
It is determined whether or not the input potential of N1 is at a high level.
If Yes, the process proceeds to step 109 because the condition is normal. If No, the process proceeds to step 112 because any abnormality has occurred, and the relays 3b to 5b are turned off.

In step 109, a sandwiching process is performed. A flowchart of the sandwiching process will be described with reference to FIG. In step 109a, it is determined whether or not there is a pinch. In this determination, the rising speed of the window glass is detected based on the above-described motor rotation pulse. If Yes, it is determined that there is a pinch, and the process proceeds to step 109b.
b is turned off, the relay 4b is turned on, and the process proceeds to step 109c. If No, it is determined that there is no pinching and the process returns to step 101.

In step 109c, it is determined whether the window glass has dropped by a predetermined amount based on the detection signal LS. If Yes, the relays 3b and 4b are turned off to stop the window glass. If No, the process proceeds to step 109b. Lower the return window glass. This terminates the entrapment process and returns to Step 101. In the entrapment process of Step 109, once it is determined that entrapment is present, the process proceeds until the window stops, and during this time, the temperature detection element 6
Is turned off and the input potential of IN1 of the control circuit 2 becomes a middle level, the energization of the drive motor 1 is not stopped. Thereby, even if the driving motor 1 becomes high temperature or overloaded during the entrapment process,
Since the sandwiching process is given priority and the inversion drive (downward movement of the window glass) of the driving motor 1 is performed, the driving motor 1 is not stopped during the sandwiching process. In addition,
Even if the driving motor 1 is in a high temperature or overloaded state, the driving motor 1 is not damaged for a certain period after the temperature detecting element 6 is turned off. Drive motor 1 even if drive is prioritized
Will not damage.

FIG. 5A is a time chart when the temperature detecting element 6 is turned off during the sandwiching process. As shown in this figure, even if the temperature detection element 6 is turned off during the entrapment process, the inversion drive of the drive motor 1 by the entrapment process is not stopped, and the drive motor 1 is not driven until the inversion ends. Driving is done. As described above, even if the temperature detection element 6 is turned off, the pinching process is prioritized, and the above-described effect is obtained.

For reference, FIG. 5 (b) shows a time chart when the temperature detecting element 6 is turned off while the window glass is rising and no temperature sensor is turned off while the window glass is moving down. ) And (c). As shown in these figures, when the temperature detection element 6 is turned off when the entrapment processing is not performed, the rotation of the drive motor 1 is stopped as soon as the input potential of IN1 of the control circuit 2 becomes a middle level. Work to do. As described above, when the temperature detecting element 6 is turned off, the driving motor 1 is not stopped during the entrapment processing, and the driving motor 1 is stopped at other times.

If No in step 106, the relays 3b and 4b are turned off as shown in FIG. 2A to stop the window glass, and the process proceeds to step 111. In step 111, it is determined whether or not the input potential of IN1 of the control circuit 2 is at a low level. If Yes, the process proceeds to step 109 because the condition is normal. If No, the process proceeds to step 112 because any abnormality has occurred, and the relays 3b to 5b are turned off.

As described above, even if the temperature detecting element 6 is turned off, priority is given to the entrapment processing, so that it is possible to prevent the drive motor 1 from stopping during the entrapment processing. (Second Embodiment) FIG. 6 shows a circuit configuration diagram of a drive control device for a power window for a vehicle in this embodiment. Note that the present embodiment is substantially the same as the circuit configuration of the power window drive control device in the first embodiment. Therefore, the same parts are denoted by the same reference numerals, and only different parts will be described.

In this embodiment, the relay 3b and the relay 4
A temperature detecting element 6 is provided between the terminal on the ground potential side of b and the ground potential. With such a configuration, when the temperature detection element 6 is turned off, the power supply to the drive motor 1 is stopped. Further, a bypass circuit 10 is provided in parallel with the temperature detection element 6, and the bypass circuit 1 is controlled by a third relay circuit 11 controlled by the control circuit 2.
1 can be switched on and off. It should be noted that a current detection resistor 12 is connected in series to the bypass circuit 11. Even when the relay 11 is turned on by the current detection resistor 12, the control circuit 2 detects the ON fault via the amplifier circuit 13. You can do it. When such an ON failure occurs, the control circuit 2 can stop energizing the drive motor 1 by switching off the first and second relay circuits 3 and 4.

The operation of the thus configured drive control device will be described based on the processing performed by the control circuit 2.
FIG. 7 shows a flowchart of a process performed by the control circuit 2. First, in step 201, it is determined whether or not pinching has occurred. This determination is made based on the motor rotation pulse as in the first embodiment. And No
If yes, go to step 202; if yes, go to step 208.

In step 202, it is determined whether or not the operation can be continued, for example, whether or not the above-described ON failure has occurred. If the determination is Yes, the process proceeds to step 203;
b, 4b are turned off, and the motor is stopped. Step 2
At 03, it is determined whether or not an UP input has been made. If yes, the process proceeds to step 204, where the relay 3
b is turned on and the relay 4b is turned off to raise the window glass.

If No, the process proceeds to step 205, and it is determined whether a DOWN input has been made. If Yes, the process proceeds to step 206, where the relay 3
b is turned off and the relay 4b is turned on to lower the window glass. If No, the process returns to step 201. On the other hand, if it is determined in step 201 that pinching has occurred, the process proceeds to step 208, where the relay 3b is turned off and the driving motor 1 is temporarily stopped. And Step 2
09, the relay 11b is turned on, and the bypass circuit 1
Turn on 0. Further, the relay 4b is turned on to drive the driving motor 1 in reverse. This lowers the window glass.

Then, the process proceeds to a step 211, wherein it is determined whether or not the window glass is lowered by a predetermined amount. When the window glass is lowered by a predetermined amount, the process proceeds to step 212, where the relay 3
b, 4b are turned off, and the drive motor 1 is stopped. Thereafter, the process proceeds to step 213, where the bypass relay 11b is turned off, and the process returns to step 201. As described above, the bypass circuit 10 is provided in parallel with the temperature detection element 6, and when the entrapment is detected, the bypass circuit 10 is turned on. The same effect as in the first embodiment can be obtained by preventing the drive motor 1 from stopping.

[Brief description of the drawings]

FIG. 1 is a diagram showing a circuit configuration of a drive control device for a power window according to a first embodiment.

FIG. 2 is a chart for explaining the operation of the drive control device shown in FIG. 1;

FIG. 3 is a flowchart for explaining the operation of the drive control device shown in FIG. 1;

FIG. 4 is a flowchart showing details of a sandwiching process in FIG. 3;

FIG. 5 is a time chart for explaining the operation of the drive control device.

FIG. 6 is a diagram illustrating a circuit configuration of a drive control device for a power window according to a second embodiment.

FIG. 7 is a flowchart illustrating an operation of the drive control device shown in FIG. 6;

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Driving motor, 2 ... Control circuit, 3 ... First relay circuit, 3a ... Transistor, 3b ... Relay, 4 ... Second relay circuit, 4a ... Transistor, 4b ... Relay, 5a ...
Transistor, 5b relay, 6 temperature detecting element (PT
C, bimetal).

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Yoshihisa Sato 1-1-1, Showa-cho, Kariya-shi, Aichi F-term in DENSO Corporation (reference) 2E052 AA09 BA02 CA06 EA14 EB01 EC01 GA10 GB15 GC06 GD03 HA01 KA12 KA13 3D127 AA02 BB01 CB05 DF35 FF05 FF06 FF08 FF18 FF20 5H001 AA08 AC01 AC02 AD00 5H530 AA01 BB17 CC22 CC24 CD30 CF05 DD12 DD19

Claims (5)

[Claims] A driving motor for opening and closing the windowpane; detecting that the windowpane has caught foreign matter while the windowpane is moving in the closing direction; and detecting the entrapment. In this case, a pinch prevention means for moving the window glass by reversing the moving direction of the window glass to the opening direction, and a movement stopping means for stopping the opening and closing movement of the window glass when any problem occurs. In the drive control device for a power window, when the entrapment of the foreign matter is detected, even when the problem occurs, the movement of the window glass is stopped by the movement stop unit, and the movement of the window is prevented by the entrapment prevention unit. A drive control device for a power window, wherein the movement of the glass in the opening direction is preferentially performed. 2. The power window according to claim 1, wherein the movement stopping means stops the opening and closing movement of the window glass by the motor when the motor is overloaded. Drive control device. 3. The apparatus according to claim 1, wherein the movement stopping means stops the opening and closing movement of the window glass when an ambient temperature near the motor is equal to or higher than a predetermined temperature. Power window drive controller. 4. The movement stopping means causes the motor to open and close the window glass when the motor is overloaded or when the ambient temperature near the motor is equal to or higher than a predetermined temperature. The drive control device for a power window according to claim 1, wherein the drive control device is a means for stopping. 5. A drive motor for opening and closing the windowpane, and detecting that the windowpane has caught foreign matter during the movement of the windowpane in the closing direction, and detecting the entrapment. An anti-jamming means for moving the window glass by reversing the direction of movement of the window glass in the opening direction, and opening and closing the window glass by the motor when the ambient temperature near the motor is equal to or higher than a predetermined temperature. A movement stop means for stopping movement, and a drive control device for a power window, comprising: a bypass circuit connected in parallel to the movement stop means, and when the entrapment of the foreign matter is detected, Through the bypass circuit, even when the temperature is equal to or higher than the predetermined temperature, the movement of the window glass is stopped by the movement stopping means, A drive control device for a power window, wherein a movement in an opening direction is preferentially performed.