JPH09125815A - Driving controller for power window - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent malfunction of a door glass resulting from an incorrect judge that something is caught when a door is closed during the upward movement of the door glass by an automatic operation. SOLUTION: If a door 12 is closed when a car driver has instructed the upward movement of a door glass 20 by an automatic operation, that is, when a flag F has been set, a threshold Th to be compared with the electric changing rate ΔI is increased by a specified quantity α. The threshold changed when the executed processing number K has reached a timer value S, is again changed to a preset threshold (Th-α). When the closing motion of the door 12 is detected likewise during the upward movement of the door glass 20, this system is controlled so that the electric current is neither detected nor the changing rate is compared with the threshold Th.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is used in a power window device equipped with a drive circuit for raising and lowering a door glass by a driving force of a motor, and when foreign matter is caught during the raising operation of the door glass. Further, the present invention relates to a power window drive control device for controlling a motor so as to perform a trapping avoidance process of stopping or reversing the drive of the motor.

[0002]

2. Description of the Related Art Conventionally, power window devices have been
A motor is provided for raising and lowering the door glass, and this motor is driven by operating a switch provided in the vehicle compartment to move the door glass to a fully closed position or a fully opened position.

When a user (for example, a driver) operates a switch to move the door glass toward the fully closed position, the door glass rises. If a foreign object is caught between the door glass and the window frame during the operation of raising the door glass, this state is detected, and the rotation of the motor controlling the operation of the door glass is stopped or reversed after the stop. It has become so. This is because the foreign matter is trapped between the door glass and the window frame, the movement of the door glass is blocked, so that the motor is loaded and the overcurrent is detected to operate.

That is, if any object (foreign matter) is touched during the raising operation of the door glass, this state is detected, and the movement of the door glass is stopped, or after the stop, the door glass is inverted and moved by a predetermined amount. . Therefore, the foreign matter and the door glass can be reliably protected.

[0005]

However, the user may operate the switch to close the door while the door glass is being raised. In particular, this can happen when using an auto switch to raise and move the door glass. At this time, the door glass may vibrate for a short time, but due to the vibration, the door glass strongly contacts the weather strip or the like, and the upward movement is suppressed by the frictional force. Therefore, a load is applied to the upward movement of the door glass, which causes an overcurrent. Therefore, there is a case in which it is erroneously recognized that a foreign object is trapped between the door glass and the window frame, and the door glass sometimes executes the trapping prevention operation.

In view of the above facts, the present invention erroneously recognizes that foreign matter is trapped between the door glass and the window frame even when the door is closed while the door glass is moving upward. The present invention relates to a power window drive control device having a function of preventing malfunction of door glass.

[0007]

In order to achieve the above object, the invention according to claim 1 is used in a power window device provided with a drive circuit for raising and lowering a door glass by a driving force of a motor, A power window drive control device for controlling a motor so as to perform a trapping avoidance process of stopping or reversing the drive of a motor when a foreign object is trapped during the raising operation of the door glass, Load detecting means for detecting a load, comparing means for comparing the load detected by the load detecting means with a predetermined threshold value, and the load detected by the load detecting means by the comparing means is a threshold value Pinching prevention control means for controlling the drive of the motor to prevent the entrapment of foreign matter between the door glass and the window frame when the temperature exceeds the limit, and the opening / closing state of the vehicle door A door opening / closing detecting means for detecting and a threshold value predetermined when the door opening / closing detecting means detects that the vehicle door is closed during the rising operation of the door glass is caused by the door closing operation. The threshold value changing means for changing the value to a value larger than the load generated for a predetermined time.

According to the invention described in claim 1, the load when the motor is driven is detected and compared with a predetermined threshold value. Change depending on whether the door is closed during the glass raising operation. That is, when it is detected that the door closing operation is performed during the raising operation of the door glass, the threshold value is changed to a threshold value exceeding the load generated by the door closing operation. As a result, the closing operation of the door glass can be prevented from being erroneously recognized as some foreign matter being sandwiched between the door glass and the window frame, and the malfunction of the door glass can be prevented. Therefore, it is possible to prevent foreign matter from being caught between the door glass and the window frame, and to reliably protect the foreign matter and the door glass.

The threshold value to be changed may be set to a value larger than the detected load by previously detecting the load of the motor generated when the door is closed.

The invention according to claim 2 is used in a power window device provided with a drive circuit for raising and lowering a door glass by a driving force of a motor, and foreign matter is trapped during the raising operation of the door glass. In this case, there is provided a power window drive control device for controlling the motor so as to perform a trapping avoidance process of stopping or reversing the drive of the motor, the load detecting means detecting a load when the motor is driven, and the load detecting means. Between the door glass and the window frame when the load detected by the load detecting means by the comparing means exceeds a threshold value, Trapping prevention control means for controlling the drive of the motor in order to prevent trapping of foreign matter, door opening / closing detection means for detecting the open / closed state of the vehicle door, and door glass By the door opening and closing detecting means during rising operation has a comparison inhibiting means for inhibiting the comparison by said comparison means when it is detected that the vehicle door is closed a predetermined time, the.

According to the second aspect of the present invention, it is detected whether or not the closing operation of the door is performed during the raising operation of the door glass, and the load at the time of driving the motor and the threshold value are compared thereby. Decide whether or not. If the door is not closed, the load is compared with a predetermined threshold value, and based on the result, the drive of the motor is stopped or controlled to be reversed after the stop. On the other hand, when it is detected that the door is closed, the load is controlled so as not to be compared with the threshold value for a predetermined time. As a result, it is possible to accurately recognize the closing operation of the door, and it is possible to prevent erroneous recognition of both of them, so that it is possible to prevent erroneous operation of the trapping prevention operation.

[0012]

1 shows a power window drive mechanism for a vehicle having a control circuit to which the present invention is applied.

As shown in FIG. 1, the window regulator unit 16 is of a so-called wire type, and the motor 22
The wire is wound around the rotary plate 22A attached to the drive shaft of the. The end of this wire is connected to a holding channel 24 that supports the lower end of the door glass 20, and the holding channel 24 is attached to a main guide 26 so as to be vertically movable. As a result, when the motor 22 rotates in the forward and reverse directions, this rotational driving force is transmitted via the wire, and the door glass 20 moves up and down along the glass guide 18. The configuration of the window regulator unit 16 is not limited to such a wire type, and may be an X arm type or a so-called motor self-propelled type in which the motor itself moves along the rack. Good.

When the door glass 20 is lifted by the motor 22, the peripheral edge portion of the door glass 20 is a rubber weather strip (not shown) in the frame 12A of the door 12.
And the opening of the door frame 12A is closed. When the door glass 20 is moved downward by the rotation of the motor 22, the opening of the frame 12A of the door 12 is opened.

FIG. 2 shows a power window drive control device 10 according to the present embodiment for controlling the drive of the motor 22 by operating an auto / manual switch 48.

The motor 22 is operated by an auto / manual switch 48. As the auto / manual switch 48, for the driver's seat, for example, one that can be operated in two steps in both directions (fully closed position direction and fully open position direction) can be applied. In the case of the one-step operation, the motor 22 of the door 12 is driven only during the operation of the auto / manual switch 48 (manual operation), and the door glass 20 is removed even if the hand is released from the auto / manual switch 48 by the two-step operation. The motor 22 is driven until it reaches a predetermined position (automatic operation). Further, as the auto / manual switch 48 attached to the other door such as the passenger seat, only the manual operation capable of operating one step in each direction is applied. Further, the motor 22 can rotate the rotating plate 22A in either forward or reverse directions to raise or lower the door glass 20.

The terminal 30 provided at one end of the power window driving motor 22 is connected to the common terminal 34A of the first relay switch 34. Also, the first
The contact point 34B is grounded via a minute resistor 38,
The second contact 34C is connected to the power supply line 40. The first relay switch 34 is a switch for raising the door glass, and corresponds to the first relay coil 42 provided in the power window control device 46.

The power line 40 is connected to a terminal IG connected to a vehicle-mounted battery via an ignition switch (not shown), and power is supplied when the ignition switch (not shown) is turned on.

Here, when the first relay coil 42 is not excited, the first relay switch 34 has the second contact 34C.
It is designed to switch to.

On the other hand, the motor 2 for driving the power window
The second terminal 32 is connected to the common terminal 36A of the second relay switch 36. The second relay switch 36 is for lowering the door glass, the first contact 36B is grounded via the minute resistance 38 like the first relay switch 34, and the second contact 36C is connected to the power supply line 40. It is connected. It also corresponds to the second relay coil 44 provided in the power window control device 46.

Here, when the second relay coil 44 is not excited, the second relay switch 36 is switched to the second contact 36C.

Therefore, when the first relay coil 42 is excited, a current flows from the terminal 30 of the motor 22 to the terminal 32, the motor rotates in the forward direction, and the door glass 20 is moved toward the fully closed position.
That is, it can be moved upward. When the second relay coil 44 is excited, a current flows from the terminal 32 of the motor to the terminal 30, and the motor 22 reversely rotates so that the door glass 20 can be moved in the fully open position, that is, moved downward. ing.

The power window controller 46 for controlling the drive of the motor 22 includes an auto / manual switch 4
A signal according to the operation state of No. 8 is input, and a drive current for forward rotation and reverse rotation is sent to the motor 22.

The power window control device 46 is connected to both ends of each of the first relay coil 42 and the second relay coil 44 described above, and is a signal output by operating the auto / manual switch 48. Either of the coils is excited.

Further, a signal from a door switch 50 for detecting opening / closing of the door 12 is input to the power window control device 46. Further, the power window control device 46 is adapted to receive the signal output from the output end of the comparator 52.

At the input terminals of the comparator 52, a current change rate and a threshold value setting device 54 when the motor 22 is driven, respectively.
The threshold value determined by is input, and the comparator 52 compares the two. As a result of comparison by the comparator 52, a low level (L) signal is output when the threshold value exceeds the current change rate, and a high level (H) signal is output when the current change rate exceeds the threshold value. ) Signal is to be output. Further, the comparison result of the comparator 52 is input to the power window control device 46, and the drive of the motor 22 is controlled.

Here, the power window control device 46 determines that a foreign object is trapped between the door glass 20 and the frame 12A (window frame) when the current change rate exceeds the threshold value, and the motor 22 The rotation is stopped or controlled after being stopped.

By the way, although the threshold value is preset in the threshold value setting device 54, the door 12 is closed while the door glass 20 is being automatically moved upward by the automatic / manual switch 48. When it is detected by the door switch 50, the power window control device 46 may recognize this. Therefore, the threshold value setting device 54 changes the threshold value to a threshold value larger than this value for a predetermined time based on the current change rate obtained from the overcurrent caused by the closing operation of the door 12. It is like this. The predetermined time at this time is a time until the overcurrent generated by the closing operation of the door 12 disappears.

Next, the operation of the embodiment of the present invention will be described. When the occupant operates the switch for raising the door glass 20 by automatically operating the automatic / manual switch 48, the first relay coil 42 is energized and excited.

By exciting the first relay coil 42, the first relay switch 34 is switched from the first contact 34B to the first contact 34C. As a result, the motor 22 is driven in the normal direction, and the door glass 20 can be raised.

When the door glass 20 is lowered, the second relay coil 44 is energized and excited by turning on the lowering switch. As a result, the second relay switch 36 is switched to the second contact 36C, the motor 22 is reversely driven, and the door glass 20 can be lowered.

The flowcharts shown in FIGS. 3 and 4 correspond to claims 1 and 2, respectively.

First, the operation of the embodiment corresponding to claim 1 will be described with reference to the flow chart shown in FIG.

In step 200, the timer value S is set. This is set based on the number of times the process shown in this flowchart is executed during the time until the overcurrent generated when the door 12 is closed is eliminated.

Next, at step 202, the automatic / manual switch 48 provided around the seat is automatically operated to determine whether or not the upward movement of the door glass 20, that is, the movement in the closing direction is instructed.

If it is determined that the upward movement of the door glass 20 has not been instructed, the processing of this routine ends.

On the other hand, when it is determined that the door glass 20 is being moved upward by the automatic operation, the current value I due to the driving of the motor 22 is detected in step 204.

Further, in step 206, the current change rate Δ is calculated based on the current value detected last time and the current value detected this time.
I is calculated, and the process proceeds to step 208.

In step 208, the calculated current change rate ΔI and the threshold value Th are compared. This threshold T
Although h is predetermined, it may be changed by the processing described later.

In step 208, the current change rate ΔI
When it is determined that the value of exceeds the threshold value Th, it is determined that a foreign matter is sandwiched between the door glass 20 and the frame 12A. Therefore, the process proceeds to step 210, and the drive of the motor 22 is stopped or reversed after the stop to control the door glass 20 to move downward by a predetermined amount. This is the trapping prevention operation.

On the other hand, in step 208, when the current change rate ΔI does not exceed the threshold value Th, the process proceeds to step 212, and it is determined whether or not the flag F is reset (0).

If the flag F is 0, the routine proceeds to step 214, where it is judged if the closing operation of the door 12 has been performed.

When the closing operation of the door 12 is performed, the flag F is set (1) in step 216.

Subsequently, at step 218, the threshold value Th
Change the value of. This changes the predetermined threshold value to a value larger than the current change rate caused by the closing operation of the door 12 (Th + α).

Further, in step 220, the value of K indicating the number of times of execution of the processing shown in this flowchart is reset.

On the other hand, if it is determined in step 214 that the door 12 has not been closed, the process of this routine ends.

When it is determined in step 212 that the flag F is not 0, that is, when the door 12 is closed and the threshold value Th is increased by a predetermined amount (α), the process proceeds to step 222. .

In step 222, the predetermined number of times of process execution K is incremented.

Further, in step 224, the number K of processing executions is compared with the timer value S. Here, when it is determined that the value of the execution count K is larger than the timer value S, the process proceeds to step 226, and the threshold value changed in step 218 is changed to a predetermined threshold value (Th. -Α).

That is, when the flag F is set, the threshold value Th that is compared with the current change rate ΔI in step 208 is a large value by a predetermined amount (α), and the number of times of processing execution K is the timer value S. Is repeated until.

Further, in step 228, flag F is set.
Reset. As a result, the closing operation of the door 12 is not erroneously recognized as a foreign substance being sandwiched between the door glass 20 and the frame 12A, and the threshold value is changed to a value larger by a predetermined amount. It is possible to prevent malfunction.

Next, the operation of the embodiment corresponding to claim 2 will be described with reference to the flowchart of FIG.

In FIG. 4, since the same processing is performed for the portions corresponding to the numbers shown in FIG. 3, the description thereof will be omitted.

At step 230, the number of processing executions K and the timer value S are compared. If the value of the process execution count K has not reached the timer value S, the process returns to step 222A and the process execution count K is incremented.

In step 232, it is determined whether or not the door 12 is closed. If the door 12 is not closed, the current value I is continuously detected. It has become.

Therefore, while the door glass 20 is rising, the door 1
By detecting whether or not the closing operation of No. 2 is performed, the generated overcurrent is due to the closing operation of the door 12 or the foreign matter is sandwiched between the door glass 20 and the frame 12A. Since it can be surely recognized whether or not the door glass 20 is closed, it is possible to perform control so that the malfunction of the door glass 20, that is, the trapping prevention operation is not executed when the door 12 is closed.

From the above, whether or not the closing operation of the door 12 is performed during the upward movement of the door glass 20 is detected, and the door 12 is detected.
When the closing operation of the door 12 is performed, the predetermined threshold value is changed to a larger value by a predetermined amount, or when it is determined that the closing operation of the door 12 is performed, the door glass 20 and the frame 12A are It is possible to prevent the closing operation of the door 12 from being erroneously recognized as a foreign object being caught by determining that the foreign material is not caught between the door and the door glass 20, and to prevent the malfunction of the door glass 20.

In the present embodiment, the current change rate ΔI is compared with the threshold value Th and the drive of the motor 22 is controlled according to the comparison result.
The drive of the motor 22 may be controlled by comparing the current value detected by the current detection means with a threshold value without calculating I.

Further, in the present embodiment, the method of detecting the entrapment of the foreign matter between the door glass and the frame by utilizing the current change rate ΔI has been described, but a pulse signal generator or the like is provided to rotate the motor. The entrapment may be detected by using the cycle of the pulse signal generated in synchronization with.

[0060]

As described above, in the power window drive control device according to the first aspect of the present invention, when the automatic / manual switch provided around the seat is automatically operated to instruct the upward movement of the door glass. When the door is closed, the threshold value is changed to a value larger than the load generated at this time and the processing is performed.Therefore, foreign matter is caught between the door and the door glass and frame. This has an excellent effect that foreign matter and door glass can be surely protected without being erroneously recognized as a thing.

Further, in the power window drive control device according to the second aspect of the invention, when the automatic / manual switch provided around the seat is instructed to move up the door glass by the automatic operation, the door closing operation is performed. If it is detected, it is predicted that the generated load was caused by the closing motion of the door, not by the foreign matter being caught between the door glass and the frame. Since the comparison is not performed for a predetermined time, it is possible to prevent the door glass from malfunctioning by erroneously recognizing the closing operation of the door and the entrapment of the foreign matter, and it is possible to reliably protect the foreign matter and the door glass. Have an effect.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an internal structure of a door on a driver's seat side.

FIG. 2 is a drive circuit diagram of the power window drive control device according to the embodiment of the present invention.

FIG. 3 is a control flowchart showing an entrapment detection control routine using a threshold value changing means.

FIG. 4 is a control flowchart showing an entrapment detection control routine.

[Explanation of symbols]

10 Power Window Drive Control Device 12A Frame (Window Frame) 20 Door Glass 22 Motor 34 First Relay Switch 36 Second Relay Switch 38 Micro Resistor 46 Power Window Control Device (Pinching Prevention Means) 48 Auto / Manual Switch 50 Door Switch (Door open / close detecting means) 52 Comparator (comparing means) 54 Threshold setting device (threshold changing means)

Claims (2)

[Claims] 1. A power window device provided with a drive circuit for raising and lowering a door glass by a driving force of a motor, which drives a motor when a foreign object is trapped during a raising operation of the door glass. A power window drive control device for controlling a motor to perform a trapping avoidance process of stopping or reversing, wherein load detection means for detecting a load when driving the motor, and load detected by the load detection means in advance. Comparing means for comparing with a predetermined threshold value, and preventing foreign matter from being trapped between the door glass and the window frame when the load detected by the load detecting means by the comparing means exceeds the threshold value. For preventing the motor from being caught, a door opening / closing detecting means for detecting the open / closed state of the vehicle door, and a door opening / closing detection means for raising the door glass. A threshold value for changing a predetermined threshold value to a value larger than the load caused by the closing operation of the door for a predetermined time when the opening / closing detection means detects that the vehicle door is closed. A power window drive control device including: a changing unit; 2. A power window device provided with a drive circuit for raising and lowering a door glass by a driving force of a motor, which drives a motor when a foreign object is caught during the raising operation of the door glass. A power window drive control device for controlling a motor to perform a trapping avoidance process of stopping or reversing, wherein load detection means for detecting a load when driving the motor, and load detected by the load detection means in advance. Comparing means for comparing with a predetermined threshold value, and preventing foreign matter from being trapped between the door glass and the window frame when the load detected by the load detecting means by the comparing means exceeds the threshold value. For preventing the motor from being caught, a door opening / closing detecting means for detecting the open / closed state of the vehicle door, and a door opening / closing detection means for raising the door glass. Power window drive control device having a comparison inhibiting means for inhibiting a predetermined time comparison by said comparison means when it is detected that the vehicle door has been closed by the opening and closing detecting means.