JP3256308B2 - Power window drive control device - Google Patents

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 for moving a door glass of a vehicle up and down by a driving force of a motor.

[0002]

2. Description of the Related Art Generally, in a vehicle equipped with a power window,
On the driver's seat side, a manual switch and an auto switch are provided as power window switches.

In the auto switch, when the up or down side contact is turned on, the motor continues to be driven even if the hand is released, and the door glass is moved until it is fully closed or fully opened. Here, when the door glass is fully closed, for example, the movement is prevented by the window frame or the like, so that the driving current of the motor increases. When the driving current exceeds a predetermined value, the driving of the motor is stopped.

In the case where foreign matter is present on the ascending movement trajectory of the door glass, an abnormal current (an abnormal current due to overload of the motor) due to the foreign matter is detected, and the driving of the motor is stopped or stopped. It is considered to reverse. In this case, a fully-closed switch for detecting that the door glass is in the vicinity of the fully-closed state may be provided in order to distinguish from a current rise at the time of the fully-closed state.

[0005] In addition, there is another type in which the overload state of the motor is detected by monitoring the motor rotation speed instead of the motor current, and the entrapment of foreign matter is detected.

[0006]

However, it is important to set a threshold value (threshold level) for detecting foreign object entrapment.

That is, if the threshold value is too high, the detection of the foreign substance is not detected until the tightening load is increased to a certain degree or more, which adversely affects the foreign substance or the glass.
On the other hand, if the threshold is too low, door installation, aging,
Although there is no foreign matter due to adhesion of dust, etc., the rise of the door glass is hindered, and the door glass does not close completely,
This is because the same operation as that performed at the time of detection of foreign object entrapment is repeated at a position where the door glass is raised.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described circumstances, and has as its object to provide a method for effectively preventing unnecessary entrapment detection while effectively preventing the occurrence of erroneous entrapment. It is an object of the present invention to provide a power window drive control device that can perform the following.

[0009]

The present invention SUMMARY OF] is a door glass of a vehicle to a power window driving control device for vertical movement by a driving force of the motor, the drive current of the motor when the door glass increased by the driving of the motor and the motor drive current detection means for detecting a drive control means for stopping after a predetermined time reversing the motor when the detected driving current by the motor drive current detection means exceeds a threshold value, can be operated from the outside, at the time of operation and inhibiting means for inhibiting the makes the chromophore at the distal end over motor reversal stop control by the drive control means, a position detecting means for detecting the position of said door glass when said drive current exceeds a threshold value, said inhibiting means is operated The door glass is positioned near the position detected by the position detecting means.
The threshold when the threshold value is exceeded
Change it to a value larger than the dynamic current and move it to the position of the door glass.
And threshold changing means for generating a corresponding new threshold value, said Xin
Generates an alarm when the threshold exceeds a predetermined judgment level
Alarm generating means for performing the driving control means,
The operation of the prohibition means is released, and the motor drive current is detected.
The drive current detected by the means exceeds the new threshold
The motor is stopped after reversing the motor for a predetermined time.
Sign.

[0010]

According to the power window drive control device having the above-described structure, the drive current of the motor when the door glass is raised is detected by the motor drive current detection means, and the detected drive current is set to the threshold value.
When the value is exceeded, the motor is reversed by the drive control means for a predetermined time and then stopped. As a result, when a foreign object is caught, this is detected and the door glass is lowered to a position (including a position when fully opened) and stopped. Here, by setting the threshold value relatively low, it is possible to sufficiently detect the entrapment of foreign matter.

When the threshold value for detection of entrapment is set relatively low as in this case, the same operations as those performed when the entrapment of foreign objects is detected are performed by installing the door, aging, and the like.
Alternatively, it may occur due to attachment of dust or the like. Therefore, according to the present invention, when the same operation as that at the time of detection of foreign object entrapment is performed even though there is no foreign object due to such a construction of the door, the user first operates the prohibition means from outside. Accordingly, the prohibition means prohibits the motor reversal stop control by the drive control means. For this reason,
If the door glass cannot be completely closed due to installation of the door, aging, or adhesion of dust, the door glass can be forcibly completely closed.

When the prohibiting means is operated by the user, the motor reversal stop control by the drive control means is prohibited by the prohibiting means, and the door glass is forcibly closed, the position detecting means causes the drive current to exceed the threshold value. The position of the door glass is detected, and the threshold value near the detected position is
It is changed to value greater than the driving current by the threshold changing means. Then, the alarm generating means determines whether or not the new threshold value after the change is equal to or lower than a predetermined determination level , and
Raise an alarm when the threshold exceeds a certain judgment level
You.

Accordingly, when the door glass is lowered and the window is opened, the operation of the prohibiting means is released, and the door glass is raised again, if the driving current does not exceed the changed threshold value, However, the motor reversal stop control at the time of motor overload by the drive control means is not performed. On the other hand, the drive control means
The drive current detected by the drive current detection means is set to the new threshold value.
When the value is exceeded, the motor is stopped after reversing for a predetermined time.
Let Thereby, unnecessary pinch detection operation is avoided.

[0014]

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS.

FIG. 1 is a circuit diagram of a power window drive control device 10 according to this embodiment.

In FIG. 1, both ends of a motor 12 for driving a power window are provided with a first relay circuit 14 (two contacts) provided for raising the door glass and a second relay provided for lowering the door glass. Circuit 16 (2 contacts)
Are connected to the respective common terminals 14A and 16A.

The first contacts 14B and 16B of these relay circuits 14 and 16 are both small resistance values (about 10
(mΩ) via a shunt resistor 18 for current detection. In addition, these relay circuits 1
Each of the second contacts 14C of 4 and 16 is commonly connected to the power supply line 20.

The first relay circuit 14 constitutes a first relay together with the first coil 22. When the first coil 22 is not energized, the first contact 14B
Side, and when the first coil 22 is excited, it switches to the second contact 14C side.
Similarly, the second relay circuit 16 constitutes a second relay together with the second coil 24. When the second coil 24 is not energized, it switches to the first contact 16B side. That is, when the second coil 24 is excited, it switches to the second contact 16C side.

One end of each of the first and second coils 22 and 24 is commonly connected to the power supply line 20, and the other end is a first emitter-grounded NPN transistor.
And the collector terminals 26C and 28C of the second transistor 28 and the second transistor 28, respectively.

The collector terminal 2 of the first transistor 26
6C and the ground, a switch 30 for manually raising the door glass is interposed, and between the collector terminal 28C of the second transistor 28 and the ground, a switch 32 for manually lowering the door glass is provided. Is interposed.

Therefore, by turning on the manual ascending switch 30, the first coil 22 is excited, the first relay circuit 14 is switched to the second contact 14C, and the motor 1 is turned on.
2 can be rotated forward to raise the door glass. Similarly, by turning on the manual lowering switch 32, the second coil 24 is excited, and the second coil 24 is turned on.
Is switched to the second contact point 16C, and the motor 12 is rotated in the reverse direction to lower the door glass 11. .

The base terminals 26 B and 28 B of the two transistors 26 and 28 are connected to an input / output port 94 of the controller 33. In the controller 33, the transistors 26 and 28 can be turned on and off by outputting a predetermined on signal to the respective base terminals 26B and 28B or stopping the output of the on signal. That is, when an ON signal is input from the controller 33 to the base terminals 26B and 28B of these transistors 26 and 28, the respective collector terminals 26C and 28C and the emitter terminals 26E and 28E conduct, and the transistors are turned on. When there is no input of an ON signal, the collector terminals 26C and 28C and the emitter terminals 26E and 28E are non-conductive and turned off. Therefore, these transistors 26 and 28 have a function equivalent to the function of the manual up and down switches 30 and 32.

From the high potential side of the shunt resistor 18, a signal line 34 for motor current detection which constitutes a motor current detection circuit as a motor drive state detecting means together with the shunt resistor 18 is branched. This signal line 34 is connected to the resistor 3
6, the non-inverting input terminal 40 of the operational amplifier 40
A is connected. The other end of the electrolytic capacitor 42 whose one end is grounded is connected between the resistor 36 and the resistor 38 to constitute a filter section 44. Operational amplifier 4
The 0 inverting input terminal 40B is grounded via a resistor 46. Also, from the output terminal 40C of the operational amplifier 40,
The amplifier circuit section 50 is connected to the inverting input terminal 40B via the feedback resistor 48.

Further, the output terminal 40C of the operational amplifier 40
Is connected to the A / D converter 98 of the controller 33 so that the value of the drive current (motor current) of the motor 12 is input.

The controller 33 includes a CPU 88 and a RAM.
90, a ROM 92, an input / output port 94, and a bus 96 such as a data bus or a control bus connecting these. As described above, the motor current is input to the controller 33 via the A / D converter 98. In addition, an automatic signal (instruction to automatically raise and lower the door glass) via the input / output port 94 is provided to the controller 33. This will be described later). Further, the controller 33 has a door lock switch 60 as a prohibiting means via an input / output port 94.
(This will also be described later.) The output of the fully closed switch 70 for detecting the fully closed state of the door glass is input. Furthermore, in the present embodiment, the output of a potentiometer (a kind of variable resistor that changes linear displacement into a change in electrical resistance) 82 as a position detecting means is input to the controller 33 via an A / D converter 98. It has become.

On the other hand, the output of the controller 33 includes the above-described ON signal to the first and second transistors 26 and 28 output through the input / output port 94. In addition, the input / output port 9
4, an ON signal is output to a base terminal 83B of a third transistor 83, which is an NPN transistor having a common emitter. The third transistor 83 is for blowing a buzzer 84. One end of the buzzer 84 is connected to the power supply line 20, and the other end is connected to the collector terminal 83 </ b> C of the third transistor 83. That is, the base terminal 83B of the third transistor 83
When a predetermined ON signal is output from the controller 33, the collector terminal 83C and the emitter terminal 83E of the third transistor 83 become conductive, and the third transistor 83
Is turned on, the buzzer 84 sounds, and the controller 33 with respect to the base terminal 83B of the third transistor 83
When the output of the ON signal from the third transistor 83 stops, the collector terminal 83C and the emitter terminal 83E of the third transistor 83 become non-conductive, the third transistor 83 turns off, and the buzzer 84 stops sounding. ing.

The auto signal is transmitted from the power line 20 to the resistor 5.
The signal is input through a branch line 56 branching between the resistor 52 and the auto switch 54 in the signal line grounded via the second and normally open (normally open) auto switches 54. That is, the auto switch 5
When the switch 4 is in the ON state (during operation), no current flows through the branch line 56, the point I of the input / output port 94 becomes Lo (low) level, and the auto switch 54 is turned off (during non-operation). Then, a predetermined current flows, and the point I of the input / output port 94 becomes Hi.
(High) level. The controller 33 controls so that once the auto switch 54 is turned on, an always-on signal is output to the transistors 26 and 28.

The door lock switch 60 is operated externally by a user to lock the door. When the door lock switch is turned on, the ON signal is transmitted to the input / output port of the controller 33. 9
4 and the CPU 88 stops a foreign object entrapment detection function described later.

FIG. 6 shows a power window master switch portion provided on a door arm rest (not shown) provided with a door lock switch 60 and an operation portion of the above-described manual up / down switches 30 and 32. It is shown. As can be seen from this figure, a seesaw type operation unit is used as the operation unit 60A of the door lock switch 60, and the door is locked by pressing the operation unit 60A.

The above-mentioned manual up / down switch 3
0 and 32 are mechanically linked with an auto switch 54. In this embodiment, the operation units 62 of the manual up switch 30 and the manual down switch 32 are lift-up type as shown in FIG. Things are used. Therefore, when the user pushes his / her finger under the operation unit 62 and pulls it lightly, the above-described manual raising switch 30 is turned on, and the door glass can be raised for the operation time. When the 62 is strongly pulled, the auto switch 54 is also turned on at the same time as the manual raising switch 30, and the door glass continues to be raised until the door glass is fully closed even when the finger is released from the operation unit 62. By pressing down the operation unit 62, the manual lowering and the automatic lowering of the door glass are similarly performed.

In the present embodiment, a pull-up type operation unit is used as the operation unit 62 of the manual ascending switch 30 and a seesaw type operation unit is used as the operation unit 60A of the door lock switch 60. It is unlikely that the user will accidentally turn on both switches 30, 60 at the same time.

The RAM 90 has an A / D converter 9
An initial threshold value SL (see FIG. 3; hereinafter, this threshold value is referred to as a “first threshold value” for convenience) set at a relatively low level for comparison with the motor current value input from FIG. For example, while the door glass is being lifted, the CPU 88
The input signal is compared with the first threshold value, and when it is determined that the input signal is large (current exceeding a specified value), it is determined that a foreign object is caught while the door glass is being lifted or the door glass is fully closed. The output of the fully-closed sensor 70 stops the output of the ON signal to the first transistor 26 if it is fully closed, and if it is not fully closed, the first transistor 26
The output of the ON signal to the second door glass is stopped, and the ON signal is output to the second transistor 28 for lowering the door glass.

The RAM 90 has a judgment level (FIG. 4) for judging the suitability of the threshold value after the change described later.
(See AL in FIG. 5) is also stored. As shown in FIGS. 4 and 5, different levels are determined in advance depending on the position of the door. Specifically, it is set to be low near the fully closed position of the door glass, which needs to detect foreign object entrapment more quickly, to be high from the fully opened to half open position of the door glass, and to be gradually lowered in between these two. Have been.

Next, the operation of the embodiment constructed as described above will be described. First, when the door glass is manually lifted, the operation unit 62 is lightly pulled up (lightly operated to the up side), whereby the manual lifting switch 30 is lifted.
Is turned on, the first coil 22 is excited, and the first relay circuit 14 switches to the second contact 14C. At this time, since the second relay circuit 16 is switched to the first contact 16B, the motor 12 rotates forward. This raises the door glass. When the finger is released from the operation unit 62 at a desired position, the manual ascending switch 30 is turned off, the first coil 22 is de-energized, and the first relay circuit 14 is switched to the first contact 14B side. Instead, motor 1
2 are grounded at both ends. Thus, the driving of the motor 12 is stopped, and the raising of the door glass is stopped.

On the other hand, when lowering the door glass manually, the switch 32 for manual lowering is turned on by depressing the operation part 62 lightly (lightly operating down), and the second coil 24 is excited. Since the second relay circuit 16 is switched to the second contact 16C side by the
Is reversed and the door glass is lowered. When the finger is released from the operation unit 62, the lowering of the door glass stops in the same manner as in the case of the manual raising.

Next, when the operating section 62 is pulled up strongly, the auto switch 54 is turned on together with the manual lifting switch 30. In the following, referring to the timing chart of FIG.
The processing procedure of the CPU 88 when 4 is turned on will be described. FIG. 3A shows the on / off state of the door lock switch 60, and FIG.
4 shows the on / off state of the motor 12, and FIG.
5 shows the state of the change in the drive current (motor current) of FIG.

If it is confirmed in step 200 that the auto switch (auto SW) 54 is on, the CPU 88 proceeds to step 202 and outputs an on signal to the first transistor 26 for raising the door glass. Thereby, even if the hand is released from the operation unit 62 of the manual raising switch 30, the first
Of the coil 22 is continued, and the door glass is continuously raised.

Next, the CPU 88 proceeds to step 204 and waits for the lapse of a blanking period. this is,
Since the drive current of the motor 12 exceeds the threshold value due to the rush current in the early stage of switch-on and may be erroneously detected (refer to the symbol A in FIG. 3 (3)), the CPU 88 stores in the RAM 90 The first threshold value (refer to the symbol SL in FIG. 3) stored in the
Is not compared with the motor current value (detection value) from the motor (see H in FIG. 4).

When the blanking period has elapsed and the determination in step 204 is negative, the CPU 88 proceeds to step 206 to fetch the current position of the door glass from the potentiometer 82, and then in step 208 the motor At step 210, the first threshold value stored in the RAM 90 is read out.

In the next step 212, the CPU 88
The current value taken in step 208 is
It is determined whether or not the value exceeds the first threshold value read out in step 2. If the result of the determination is negative, the process proceeds to step 206 to take in the position of the next door glass.
06, 208, 210 and 212 are repeated. Accordingly, during this time, the output of the ON signal to the first transistor 26 is continued, and the door glass keeps rising.

Here, as shown by point B in FIG. 3C, the motor current is reduced to the first due to some cause (for example, aging of the door).
Exceeds the threshold value (SL), the determination in step 212 becomes affirmative, and the CPU 88 proceeds to step 214 to determine whether or not the fully-closed switch 70 is on.
If the determination here is affirmative, the CPU 8
8, the process proceeds to step 216, where the first transistor 2
The output of the ON signal to 6 is stopped, and the process proceeds to step 200. As a result, when the door glass is fully closed, the motor 1
2 stops.

On the other hand, if the determination in step 214 is negative, the CPU 88 proceeds to step 218 and determines whether the door lock switch 60 is on. Here, if it is assumed that the user has not operated the operation unit 60A of the door lock switch 60 at all, the determination in this step 218 is negative, and the CPU 88 proceeds to step 226 to execute all the operations stored in the RAM 90. It is determined whether or not one of the position data matches the position fetched in step 206. But RA
The position data is stored in the M90 on the assumption that the door lock switch 60 is turned on, as will be described later. In this case, the stored position data exists in the RAM 90. Therefore, the determination in step 226 is naturally negative. Therefore, the CPU 88 determines that an actual foreign object has been caught and proceeds to step 236 to stop outputting the ON signal to the first transistor 26 and, at the same time, outputs an ON signal to the second transistor 28.

In the next step 238, the CPU 88
Wait for a predetermined time to elapse from the start of the output of the ON signal to the second transistor 28, and wait for the predetermined time to elapse.
At 40, the output of the ON signal to the second transistor 28 is stopped, and the routine proceeds to step 200. As a result, the motor 12 is stopped after reversing for a predetermined time (see section C in FIG. 3 (3)), and the door glass is lowered to a position lower by a predetermined amount (for example, 10 cm) from the position where it is determined that foreign matter is trapped. Stop.

In this state, when the user operates the operation section 60A of the door lock switch 60 to turn on the door lock switch 60, the steps 200 to 2 are performed.
Up to 14, the same processing by the CPU 88 as described above is performed, but the determination at step 218 is affirmative. Therefore, the CPU 88 proceeds to step 220, where the current value taken in at step 208 and the first threshold value are compared. (How much the current value has exceeded the first threshold value) is calculated.

Then, in the CPU 88, the next step 2
At 22, the threshold value is changed to a value SH (see FIG. 4) larger than the current value by a predetermined value. (Hereinafter, the changed threshold value SH is referred to as a second threshold value for convenience.) In the next step 224, CP
In U88, the second threshold value changed in step 222 is stored in the RAM 90 together with the position data fetched in step 206 in that cycle. Here, the CPU 88
Is very fast, the position data captured in step 206 in that cycle is considered to be substantially the same as the position data when the motor current exceeds the first threshold. Therefore, in this case, the CPU 88 associates the position data with the second threshold value and associates the position data with the second threshold value.
Store to 0.

Thereafter, the CPU 88 proceeds to step 206
And the steps 206, 208, 210, 212, 214, 218, and
The operations of 220, 222, and 224 are repeated. Thus, when the door lock switch 60 is ON, the reversal stop control of the motor 12 at the time of detection of the foreign object being caught is performed.
The door glass rises to the fully closed position without being closed, and during this time, the position data in the section where the motor current exceeds the threshold (see the circle D in FIG. 3 (3)) is the second threshold (this value is , FIG.
As shown in (2), a value larger than the current value by a predetermined value each time is determined by the CPU 88 step by step depending on how much the current value exceeds the first threshold value. ) Is stored in the RAM 90.

Although not shown in FIG. 3, after the operation unit 62 is operated by the user and the door glass is lowered, the door lock switch 60 is turned off, and together with the door glass raising switch 30 again, Auto switch 54
Is turned on (see E in FIG. 3), the automatic ascent of the door glass is started.

In this case as well, the CPU 88 performs the processing of steps 200 to 218 in the same manner as described above.
In the area of the code F of (3), one of the position data stored in the RAM 90 matches the position fetched in the step 206.
The determination in step 226 is affirmative, and the CPU does not proceed from step 226 to step 236, but proceeds to step 228. Then, in this step 228, C
The PU 88 reads the second threshold value stored in the RAM 90 in association with the position of the door glass at that time, and in the next step 230, sets the read second threshold value to a predetermined determination level (FIG. 4). , See AL in FIG. 5).

When the second threshold value is equal to or lower than the predetermined judgment level AL as shown at point K in FIG.
In PU88, it is determined whether the captured current value exceeds the second threshold in step 208, if the current value does not exceed the second threshold value, the process proceeds to step 206,
Hereinafter, steps 206, 208, 210, 212, 21
The processing of 4,218,226,228,230,232 is repeated. During this time, the current value is compared with the second threshold value (SH) in the region F shown in FIGS. 3 and 4, and is compared with the first threshold value (SL) in other regions, and the door glass keeps rising. .

When the door glass continues to move up and reaches the fully closed position, the determination in step 214 becomes affirmative, and the CPU 88 stops outputting the ON signal to the first transistor 26 in step 216. . As a result, the motor 12 stops at the position where the door glass is fully closed.

On the other hand, if the determination in step 232 is affirmative, the CPU 88 determines that a foreign object has been actually caught, and proceeds to step 236.
The process of steps 236, 238, and 240 is performed, and the process proceeds to step 200. As a result, the reverse rotation of the motor 12 is stopped when the foreign object is detected.

On the other hand, if the second threshold value SH exceeds the determination level AL, as at point M in FIG. 5, the determination in step 230 is negative, and the CPU 88 proceeds to step 234. Then, after outputting an ON signal to the third transistor 83 to sound the buzzer 84 and warn the user, the process proceeds to step 236. Thereafter, the processes of steps 236, 238, and 240 are performed, and the process proceeds to step 20.
Move to 0. As a result, the reverse rotation of the motor 12 is stopped when the foreign object is detected.

In FIGS. 4 and 5, a section J indicates a window frame lock current mask section. As explained above,
In the present embodiment, the user operates the operation unit 60A of the door lock switch 60 to turn on the door lock switch 60, so that the motor 12 detects the entrapment of a foreign object.
Since the reversal stop control is not performed, the door glass is forcibly removed even if the same operation as that at the time of detection of foreign object entrapment occurs due to the installation of the door, aging, or adhesion of dust. Can be completely closed. On the other hand,
Since the first threshold value of the motor current for detecting foreign object entrapment is set to a relatively low level, foreign object entrapment detection can be sufficiently performed.

Further, the door lock switch 60 is turned on by the user's operation of the operation section 60A, and the C
When the motor reversal stop control at the time of motor overload by the PU 88 is prohibited and the door glass is forcibly closed,
The CPU 88 changes the threshold value to a second threshold value that is larger than the current value by a predetermined value based on the difference between the motor current value when the motor overload state occurs when the door glass is raised and the first threshold value. The threshold is stored in the RAM 90 together with the current position data.

Then, when the door glass is lowered to open the window and the door glass is raised again, the RAM
In the position of the above-mentioned door glass stored in 90, the CPU
When the current value does not exceed the second threshold value, the motor 88 prohibits the motor reversal stop control when the motor is overloaded. Therefore, when the door glass is not completely closed and stops at a certain position due to the installation of the door or the like, the user operates the operation unit 6.
When the door glass is forcibly and completely closed only once by operating 0A, the same operation as that at the time of pinch detection is not repeated at the same position without operating the operation unit 60A thereafter.

However, even in this case, if the second threshold value exceeds the determination level, the CPU 88 performs the motor reversal stop control, thereby effectively eliminating the inconvenience of erroneously entrapping foreign matter. When the second threshold value exceeds the determination level, the buzzer 84 sounds and a warning is given to the user, so that the user can immediately recognize the reason for stopping the motor reversal.

Further, the above-mentioned determination level is high near the fully opened position of the door glass where the necessity of detecting foreign matter entrapment is relatively low, and becomes lower as it is near the fully closed position of the door glass where the necessity of detecting foreign matter entrapment is high. Therefore, an unnecessary operation for detecting the foreign substance trapping can be avoided as much as possible in the vicinity of the fully opened position of the door glass, and the erroneous trapping of foreign substances in the vicinity of the fully closed position can be effectively prevented.

Although the present embodiment has exemplified the case where a potentiometer is used for position detection, the present invention is not limited to this, and another position sensor such as a pulse encoder may be used instead. May be. Also,
In this embodiment, the door lock switch 60
However, the present invention is not limited to this, and it goes without saying that a switch for canceling the pinch detection function may be separately provided.

[0060] The flowchart shown in FIG. 2 is a matter of course be only one example, short, if it is possible to obtain the same effects as described above, may use other control algorithms.

Further, in the above embodiment, the case where the reverse rotation stop control of the motor is performed by using the result of the determination of the suitability of the threshold value and a warning is issued to the user by using a buzzer has been described. It is not limited to
Either the reverse rotation stop control of the motor or a warning by a buzzer or the like may be performed, or the threshold value may be changed again using the determination result.

[0062]

As described above, according to the present invention,
Unnecessary entrapment detection operation can be effectively avoided, while there is an unprecedented excellent effect that erroneous entrapment can be effectively prevented.

[Brief description of the drawings]

FIG. 1 is a circuit diagram of a power window drive control device according to a first embodiment of the present invention.

FIG. 2 is a control flowchart of the embodiment of FIG.

FIG. 3 is a timing chart for explaining the operation of the embodiment of FIG. 1;

FIG. 4 is an enlarged view showing a region indicated by reference numeral G in FIG. 3 together with a determination level.

FIG. 5 is a diagram illustrating a case where a determination level exceeds a second threshold (a threshold after change).

FIG. 6 is a perspective view showing a power window master switch portion.

[Explanation of symbols]

 Reference Signs List 10 power window drive control device 12 motor 18 shunt resistor 33 controller 34 signal line for current detection 60 door lock switch (prohibiting means) 82 potentiometer 88 CPU

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁷ , DB name) H02P 3/06

Claims (1)

(57) [Claims] 1. A power window driving control device for a door glass of a vehicle is vertically moved by the driving force of the motor, driving of the motor when the door glass increased by the driving of the motor
A motor drive current detection means for detecting a dynamic current, the detected driving current by the motor drive current detection means threshold
A drive control means for stopping the motor after inversion for a predetermined time when the value is exceeded;
And inhibiting means for inhibiting the makes the chromophore at the distal end over motor reversal stop control, position detecting means for detecting a position <br/> location of the door glass when the drive current exceeds a threshold value, when said inhibiting means has been operated The door glass is located near the position detected by the position detecting means .
Threshold from the drive current when exceeding the threshold.
Also change to a larger value to accommodate the position of the door glass.
Threshold changing means for generating a new threshold, and an alarm when the new threshold exceeds a predetermined determination level
And an alarm generating means for generating, the drive control means, the operation of the prohibiting means is released,
The drive current detected by the motor drive current detection means is
When the new threshold value is exceeded, the motor is turned off for a predetermined time.
A power window drive control device for stopping after rolling .