JPH08254070A - Control device of power window regulator for car - Google Patents

Abstract

PURPOSE: To make accurate judgement whether an opening/closing element reciprocated by a motor has reached the reversal prohibit position set between the close position and open position, even under the situation that the supply voltage to the motor fluctuates. CONSTITUTION: A pulse encoder 3 generates pulse signals Ps in a number according to the revolving speed of a motor 1 for moving a window glass. A control circuit 5 has a counter which makes up-counting of pulse signals Ps when the window glass is moving to the open position and down-counting of signals Ps when the glass moving to the close position, and the count value of the counter is set to zero when the window glass has moved to the close position. The control circuit 5 judges that the window glass has reached the reversal prohibit position when the count value of the counter attains the reference value under the condition that the window glass is moved by the motor 1 toward the close position. The control circuit 5 make resetting so that the reversal prohibit position goes apart from the close position by altering the reference value to a greater with a higher window glass moving speed determined on the basis of the pulse signal Ps.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle power window in which an opening / closing member such as a window glass or a sunroof of a vehicle is reciprocally moved between an open position and a closed position in response to forward / reverse rotation of a motor. The present invention relates to a regulator control device.

[0002]

2. Description of the Related Art For example, a power window regulator for opening and closing a window glass of an automobile is provided with a safety function for preventing foreign matter from being caught when the window glass is closed. In this case, when the window glass is closed according to the rotation of the motor, before the window glass reaches the reversal prohibition position (for example, about 4 to 5 mm before the closed position) set immediately before the closed position. When the movement restraint state is detected, it is determined that the foreign matter is caught and the motor is rotated in the reverse direction, so that the window glass is reversely moved toward the open position.

When such a safety function is provided, it is necessary to determine whether or not the window glass has reached the above-mentioned inversion prohibition position. Therefore, conventionally, the top dead center position when the window glass is moved to the closed position is set as the origin, and the movement position of the window glass is determined with reference to this origin.

Specifically, the signal generation means for generating a number of pulse signals corresponding to the rotation speed of the window glass moving motor and the count value set to zero with the window glass at the origin (closed position). Provided with counting means for up-counting the pulse signal when moving the window glass in the opening position direction and for counting down the pulse signal when moving the window glass in the closing position direction. ,
The configuration is obtained as information indicating the absolute position of the window glass, and it is determined whether or not the window glass has reached the inversion prohibition position based on the position information thus obtained.

[0005]

In the above conventional power window regulator, the count value of the counting means is reset to zero when the window glass is moved to the closed position, that is, the window glass is moved to the closed position. The zero point of the origin is corrected each time it is moved. by the way,
Generally, the window glass has a configuration in which, when moved to the closed position, the upper end bites into the weather strip made of elastic rubber or foamed rubber, and therefore, the rotation speed of the motor for moving the window glass and The amount of bite of the window glass into the weather strip changes depending on the magnitude of the torque. In other words, the amount of bite of the window glass into the weather strip increases in accordance with the operating state of the motor, which causes a change in the position of the origin (closed position of the window glass).

However, in an automobile, it is inevitable that the voltage of the on-vehicle battery, which is the power source of the motor, fluctuates and the rotation speed and torque of the motor change greatly. Therefore, the origin position itself must be inaccurate. I don't get. Therefore, as in the conventional configuration, in the configuration of determining whether or not the window glass has reached the inversion prohibited position based on the number of pulse signals generated from the origin position as described above, the determination can be made accurately. There was a problem that it would be difficult to do.

The present invention has been made in view of the above circumstances, and an object thereof is an inversion body in which an opening / closing body which is moved between an open position and a closed position by a motor is set between the open position and the closed position. It is an object of the present invention to provide a control device for a vehicle power window regulator, which can accurately determine whether or not a prohibited position has been reached even in a situation where the power supply voltage of the motor changes.

[0008]

In order to achieve the above-mentioned object, the present invention provides a control device for a vehicle power window regulator, which is provided with an elastic body which is in pressure contact with the opening / closing body in a closed position. There is a motor for reciprocating the opening / closing body between an open position and a closed position, signal generating means for generating a pulse signal of a number corresponding to the rotation speed of the motor, and the opening / closing body for closing the closing body. Counting means for counting the pulse signal output from the state in the position,
Position determination for determining the state in which the opening / closing body is moved to the reversal prohibition position set between the open position and the closing position based on comparison between the count content of the counting means and a reference value indicating the reversal prohibition position. When the opening / closing body is moved toward the closed position, the moving speed of the opening / closing body is detected based on the pulse signal, and the reference value is higher as the detected moving speed is higher. The reversal prohibition position indicated by is reset by setting it so as to move away from the closed position.

[0009]

The opening / closing body is reciprocally moved between the open position and the closed position in response to the energization of the motor. At such a time, the signal generating means causes the motor to move. Since the number of pulse signals corresponding to the rotation speed is generated, the movement amount of the opening / closing body can be known according to the number of pulse signals. In this case, the counting means counts the pulse signal output from the state where the opening / closing body is in the closed position, and the position determining means uses the opening / closing body in the open position and the closed position. The state of being moved to the reversal prohibition position set in between is judged based on the comparison between the count content of the counting means and the reference value indicating the reversal prohibition position.

Particularly, when the opening / closing body is moved toward the closed position, the correction means detects the moving speed of the opening / closing body based on the pulse signal, and the higher the detected moving speed is, the more the reference is set. The reversal prohibition position indicated by the value is reset so as to move away from the closing position.

Therefore, when the moving speed of the opening / closing body is higher than that in the steady state, that is, when the opening / closing body is moved to the closed position and the amount of biting of the opening / closing body into the elastic body is large, the closing is performed. The distance between the position and the inversion prohibition position is expanded, and conversely, when the moving speed of the opening and closing body is lower than the steady state, that is, the opening and closing body is moved to the closed position. When the amount of biting of the opening / closing body into the elastic body is small in this state, the distance between the closed position and the inversion prohibition position is reduced. For this reason, the absolute position of the reversal prohibition position is stabilized, so that the reversal prohibition position of the opening / closing member is prohibited even when the closing position of the opening / closing member changes due to the fluctuation of the power supply voltage of the motor. The state of reaching the position can be accurately determined based on the number of the pulse signals output from the state in which the opening / closing body is at the origin.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the present invention is applied to a power window regulator for opening and closing a window glass of an automobile will be described with reference to the drawings. In FIG. 1 showing the electrical configuration, the DC motor 1 is in the forward rotation direction (direction of arrow A in the figure).
When energized to, the window glass (shown by reference numeral 2 in FIG. 4) as an opening / closing body is moved toward the closed position through a window regulator (not shown), and energized in the reverse direction (counter arrow A direction). Sometimes, the window glass is moved toward the open position through the window regulator.

A pulse encoder 3 as a signal generating means
Is built in or externally attached to the motor 1, and is configured to generate a number of pulse signals Ps according to the rotation speed of the motor 1. The pulse signal Ps from the pulse encoder 3 is a control circuit 5 in the control unit 4 (corresponding to the counting means, the position determining means and the correcting means in the present invention).
In contrast, the signal is supplied via the buffer amplifier 6.

The control circuit 5 includes a CPU, and controls energization of the motor 1 via a driver 7 and relays 8 and 9. In this case, the relay switch 8 included in each of the relays 8 and 9
In a and 9a, each normally open contact a is connected to the power supply terminal + B, each normally closed contact b is connected to the ground terminal, and the common contact c of one relay switch 8a is connected to one end of the motor 1. The common contact c of the other relay switch 9a is connected to the other end of the motor 1.

The driver 7 includes relays 8 and 9
The exciting coils 8b and 9b are selectively energized from the power supply terminal + B. At this time, when only the exciting coil 8b is energized, the contact points (c-a) of the relay switch 8a are turned on and the contact points (c-b) of the relay switch 9a are turned on. The motor 1 is energized from the power supply terminal + B in the normal direction (direction of arrow A), and the window glass 2 is moved toward the closed position. On the other hand, when only the exciting coil 9b is energized, the contact (c) of the relay switch 8a is
-B) is turned on, and the contact (c-a) of the relay switch 9a is turned on, so that the motor 1 is energized in the reverse direction (counter arrow A direction) from the power supply terminal + B to turn on the window. The glass 2 will be moved toward the open position.

The control circuit 5 includes an auto up switch 10, an auto down switch 11, and a manual up switch 1 which are well known in the power window regulator.
2 and the ON signal from the manual down switch 13 is applied. A group of pull-up resistors 14 is connected to the input side of the control circuit 5.

The control circuit 5 includes the switches 10 to 10 described above.
Based on the ON signal from 13 and the pulse signal Ps from the pulse encoder 3 and the program stored in advance,
The motor 1 is configured to perform on / off control through the driver 7 and the relays 8 and 9, and the control content and related actions will be described below with reference to FIGS. 2 to 4.

FIG. 2 shows the control contents of the control circuit 5, focusing on the portion related to the gist of the present invention. In FIG. 2, the control circuit 5 includes an auto up switch 1
It is determined whether or not 0 is turned on (step A1), and if it is not turned on, a routine for processing associated with turning on of other switches (auto down switch 11, manual up switch 12, manual down switch 13) A2 and the above determination step A1 are repeatedly executed.

When the auto down switch 10 is turned on, it is judged whether or not the on state is continued for a predetermined time τ set to prevent malfunction due to chattering or noise (step A3). YE
Only when it is determined to be "S", step A4 for determining whether or not the control circuit 5 is first turned on after the power is turned on is executed. The time when the power supply of the control circuit 5 is turned on here means the time when the in-vehicle battery is mounted and connected to a predetermined state.

If "YES" is determined in step A4, energization of only the exciting coil 8b of the relay 8 through the driver 7 starts energization of the motor 1 in the forward direction (step A5). ), This causes the window glass 2 to start moving in the closing direction.

After the energization of the motor 1 is started in this manner, the window glass 2 is restrained from moving and the motor 1 is kept in a locked state (step A6). A7 for stopping the energization of the motor to disconnect the motor 1 and the position storing routine A8
Is executed and the process returns to step A1. The judgment as to whether or not the motor 1 is in the locked state is made based on the pulse signal Ps from the pulse encoder 3.

In this case, in the position storing routine A8, the count value of the up / down counter set as an internal counter of the control circuit 5 is set to zero, and a predetermined reference value N for initialization is set as a window. Inversion prohibition position (4 from the closed position) set immediately before the closed position of the glass 2.
It is stored as position data indicating a position (about 5 mm in front). The above-mentioned inversion prohibition position is a position set to realize a safety function for preventing foreign matter from being caught when the window glass 2 is closed.

As a result of the above control, when the auto up switch 10 is turned on for the first time after the power is turned on and the window glass 2 starts to move toward the closed position, when the movement of the window glass 2 is restrained. At the time (usually when the window glass 2 is moved to the closed position), the count value of the up / down counter is set to zero to set the origin position of the window glass 2, and at the same time as the position data indicating the inversion prohibition position. The reference value N for setting is stored. In this case, the up / down counter is configured to count up the pulse signal Ps when the window glass 2 moves in the opening position direction and down count the pulse signal Ps when the window glass 2 moves in the closing position direction. Therefore, the count value can be used as position data indicating the current position of the window glass 2.

On the other hand, if "NO" is determined in the step A4, it is determined whether or not the window glass 2 is in the closed position based on the count value of the up / down counter (step A9). When the window glass 2 is in the closed position, the routine proceeds to the routine A2, but when the window glass 2 is not in the closed position, only the exciting coil 8b of the relay 8 is energized via the driver 7. Energization of the motor 1 in the forward direction is started (step A10).
As a result, the window glass 2 starts to move in the closing direction.

After energizing the motor 1 in this way, step A11 in which the pulse signal Ps from the pulse encoder 3 is down-counted by the up / down counter, and the moving speed of the window glass 2 is determined based on the pulse signal Ps. Speed detection routine A1
2 is continued until the movement of the window glass 2 is restricted and the motor 1 is locked (step A13). In this case, in the moving speed detection routine A12, the window glass 2
The moving speed S of is detected based on the following equation.

S = α (m−N) / T (1) where T is the energization time (cumulative value) of the motor 1 and m is the count value of the up / down counter at the start of energization of the motor 1 ( Position data indicating the current position of the window glass), N is a reference value indicating the inversion prohibition position, and α is a constant.

When the motor 1 is in the locked state ("YES" in step A13), it is determined whether the current position of the window glass 2 is before the reversal prohibition position by the count value of the up-down counter. And the reference value N are compared (step A14).

When it is determined "YES" in step A14, that is, when the motor 1 is in the locked state before the window glass 2 reaches the inversion prohibited position, this is referred to as window glass 2 in the present invention. It is determined that the foreign matter is sandwiched between the weather strip corresponding to the elastic body (indicated by reference numeral 15 in FIG. 4), and the exciting coil 8b of the relay 8 is turned off through the driver 7 and the relay 9 By energizing the exciting coil 9b, the energizing direction of the motor 1 is switched to the reverse direction (step A15). As a result, a safety function can be obtained in which the moving direction of the window glass 2 is automatically reversed to the opening direction according to the entrapment of foreign matter.

After that, the process waits until the window glass 2 reaches a predetermined stop position (for example, an open position or a predetermined intermediate position) at the time of automatic reversal (step A16). After the step A17 of stopping the power supply to the motor 9b and turning off the motor 1 is executed, the process returns to the step A1.

On the other hand, "NO" in step A14.
If it is determined, that is, if the motor 1 is locked after the window glass 2 reaches the inversion prohibition position, it is determined that the window glass 2 has been moved to the closed position. Then, in this case, after waiting for a predetermined retightening time, the energization of the exciting coil 9b is stopped to cut off the motor 1 (steps A18, A1).
9), which moves the windowpane 2 to the closed position.

After that, step A20 for correcting the zero point of the origin position of the window glass 2 by setting the count value of the up / down counter to zero, and the correction processing routine A21 for correcting the reference value N. The steps are sequentially executed and the process returns to step A1.

In the correction processing routine A21, the reference value N is corrected based on the moving speed S of the window glass 2 detected by the moving speed detecting routine A12. Specifically, by performing an operation (N = β · S) of multiplying the moving speed S by a predetermined correction value β (> 0), reversal prohibition according to the actual moving speed of the window glass 2 is prohibited. The reference value N indicating the position is newly obtained.

Here, the operation when the window glass 2 is moved to the closed position in response to the turning on of the auto up switch 10 in a state where the origin position of the window glass 2 is set and the reference value N is stored will be described. Then it becomes as follows. That is,
In FIG. 3, when the auto up switch 10 is turned on at the timing t1, the timing t delayed by the predetermined time τ is assumed on the assumption that the window glass 2 is not in the closed position.
The motor 1 is energized in the forward direction from 2 and the window glass 2 starts to move toward the closed position. The up-down counter is shown in FIG. 4 when the motor 1 is energized.
Although the count value is "m" as shown in (d), the count value is down-counted from "m" every time the pulse signal Ps is generated in response to the energization of the motor 1. .

After that, when the count value of the up / down counter becomes "N" (timing t3), it is determined that the window glass 2 has reached the inversion prohibition position. When the window glass 2 reaches the inversion prohibition position, the detection operation of the moving speed S of the window glass 2 by the formula (1) becomes effective for the first time, and then the window glass 2 moves to the closed position. Then, when the motor 1 is locked (timing t4), the zero point of the origin position of the window glass 2 is corrected by setting the count value of the up / down counter to zero, and the detection is performed as described above. By multiplying the moving speed S by the correction value β, the reference value N indicating the inversion prohibited position is corrected. At this time, the motor 1 is cut off at the timing t5 when the predetermined retightening time has elapsed. When the motor 1 is locked before the window glass 2 reaches the inversion prohibition position, a safety function of reversing the moving direction of the window glass 2 is obtained.

In short, according to the configuration of the present embodiment described above, the reference value N, which is the position data indicating the inversion prohibited position of the window glass 2, is corrected so that it becomes larger as the moving speed of the window glass 2 increases. It is what is done. Therefore, for example, when the moving speed of the window glass 2 is higher than the steady state in response to the increase in the power supply voltage of the motor 1, that is, the window glass 2 is moved to the closed position. When the bite amount of 2 into the weather strip 15 is large, the distance between the closed position and the inversion prohibition position indicated by the reference value N is increased.
On the contrary, when the moving speed of the window glass 2 is lower than that in the steady state in response to the decrease in the power supply voltage of the motor 1, that is, when the window glass 2 is moved to the closed position. When the biting amount of the window glass 2 into the weather strip 15 is small, the distance between the closed position and the inversion prohibition position indicated by the reference value N is reduced.

As a result, the absolute position of the reversal prohibition position is stabilized, so that the window is closed even when the closed position of the window glass 2 changes due to the fluctuation of the power supply voltage of the motor 1. The state in which the glass 2 has reached the inversion prohibition position is accurately determined based on the number of the pulse signals Ps output from the state in which the window glass 2 is at the origin position (position where the count value of the up / down counter is zero). It becomes possible to make a judgment, and the above-mentioned safety function can always be exerted in an optimum state.

The present invention is not limited to the above embodiment, but can be expanded or modified as described below. When the reversal prohibition position indicated by the reference value N is reset so as to move away from the closed position as the moving speed S of the window glass 2 is higher, the reference value N is corrected based on the moving speed S. , The count value of the up-down counter indicating the origin position of the window glass 2 to the moving speed S
The inversion prohibition position may be reset so as to move away from the closed position by performing correction based on the above.

Specifically, in the above embodiment, the window glass 2
When the motor 1 is moved to the closed position and the motor 1 is in the locked state, the zero point of the origin position of the window glass 2 is corrected by setting the count value of the up / down counter to zero. The reference value N is corrected, but instead of such a configuration, when the window glass 2 is moved to the closed position and the motor 1 is in the locked state,
By setting the count value of the up-down counter to a negative value corresponding to the moving speed S when the moving speed S is high, and to a positive value corresponding to the moving speed S when the moving speed S is relatively low. The origin position of the window glass 2 may be corrected and the reference value N may be used without being changed.

When the auto up switch 10 is turned on for the first time after the power is turned on, the motor 1 is turned off when the motor 1 is locked.
It is also possible to unconditionally reverse the energization direction of the motor 1 to reverse the moving direction of the window glass 2. However, in this case, it is necessary to consider the setting of the origin position of the window glass 2 and the setting of the reference value N. Although the pulse encoder 3 has been described as an example of the signal generating means, another signal generating means may be used as long as it can generate a number of pulse signals according to the rotation speed of the motor 1. Further, although the window glass 2 is targeted as the opening / closing body, a sunroof or the like may be targeted.

[Brief description of drawings]

FIG. 1 is an electrical configuration diagram showing an embodiment of the present invention.

FIG. 2 is a flowchart showing control contents.

FIG. 3 is a timing chart for explaining an example of control content.

FIG. 4 is a sectional view of an essential part for explaining the operation.

[Explanation of symbols]

In the drawings, 1 is a motor, 2 is a window glass (opening / closing body), 3 is a pulse encoder (signal generating means), 4 is a control unit,
5 is a control circuit (counting means, position determination means, correction means),
7 is a driver, 8 and 9 are relays, 10 is an auto-up switch, and 15 is a weather strip (elastic body).

Claims (1)

[Claims] 1. A controller for a power window regulator for a vehicle, comprising an elastic body that is brought into pressure contact with the opening / closing body when the opening / closing body is in a closed position, the opening / closing body being between an open position and a closed position. A motor for reciprocating with,
A signal generating means for generating a number of pulse signals according to the rotation speed of the motor, a counting means for counting the pulse signals output from a state where the opening / closing body is in the closed position, and the opening / closing body for opening the opening / closing body. Position determination means for determining the state moved to the reversal prohibition position set between the position and the closed position based on the comparison between the count content of the counting means and a reference value indicating the reversal prohibition position. In the case where the opening / closing body is moved toward the closed position, the moving speed of the opening / closing body is detected based on the pulse signal, and the higher the detected moving speed is, the higher the moving speed is, the inversion prohibition position indicated by the reference value. 2. A control device for a vehicle power window regulator, comprising: a correction unit that resets the vehicle so as to move away from the closed position.