JP2000096911A - Power window device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To detect the opened/closed position of a window glass without influence of the change of the fully closed position of the window glass caused by the variation of the motor power when detecting the opened/closed position of the window glass, by counting the number of pulse signals generating in accordance with the normal or reverse revolution of a driving motor for an opening/closing mechanism of the window glass, to the addition or subtractive direction by a counter, after the counter has been set to show an initial figure when the window glass has become fully close. SOLUTION: In a power window device, the characteristic of an initial set value of a counter corresponding to the battery potential in the fully closed condition of a window glass is set in advance in a table. Then, a battery voltage is detected when the window glass is fully closed and an initial set value of the counter according to the detected battery voltage is read out of the table to preset the initial value in the counter.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power window apparatus for opening and closing a window glass of a vehicle by a window glass opening / closing mechanism using a motor as a driving source.

[0002]

2. Description of the Related Art In general, in this type of power window apparatus, each time the window glass is fully closed, a counter is initially set to 0 based on the position at that time, and a window glass opening / closing mechanism is used. The open / close position of the window glass is obtained by adding and counting the number of pulse signals generated from the pulser in accordance with the rotation of the drive motor in the forward and reverse directions, and counting in the decreasing direction.

In such a device, when the window glass is completely closed, the amount of biting of the tip of the window glass into a rubber weather strip provided at the upper end of the window frame is changed by the motor power, and the window glass is completely closed. The reference position when the state is changed fluctuates, and the accuracy of the open / close position of the window glass obtained by counting the number of pulses from the reference position is reduced.

Therefore, conventionally, when the window glass stops short of the fully closed position set as an absolute reference due to a decrease in motor power when the window glass is fully closed, a pulse corresponding to the distance to the fully closed position is used. The position is corrected by calculating the number and adding the calculation result to the position detection result by the pulse count at the time of opening / closing the window glass performed later (Japanese Patent Laid-Open No. 7-2).
29361).

[0005]

The problem to be solved is that, based on the position when the window glass is fully closed, the drive motor in the window glass opening / closing mechanism rotates in the forward and reverse directions. When the open / close position of the window glass is determined by counting the number of pulse signals generated in the direction of addition and decrement, when the window glass is fully closed, a rubber weather provided at the upper end of the window frame The reference position fluctuates due to the amount of biting of the tip of the window glass into the strip by the motor power, and the accuracy of the window opening / closing position obtained by counting the number of pulses from the reference position is reduced.

[0006]

According to the present invention, a counter is initially set when a window glass is fully closed, and a counter is generated in accordance with rotation of a drive motor in a window glass opening / closing mechanism in forward and reverse directions. When the open / close position of the window glass is determined by counting the number of pulse signals to be added or subtracted by the counter,
The characteristics of the initial set value of the counter according to the battery voltage when the window glass is fully closed are set in advance in a table, and the battery voltage when the window glass is fully closed is detected. A means for reading the initial set value of the counter according to the voltage from the table and initially setting the counter in the counter is adopted.

Further, according to the present invention, the counter is initially set so that the position when the power supply voltage of the motor is a predetermined voltage value and the window glass is fully closed is used as a reference, and then the window glass is completely reset. A means for detecting a variation of the power supply voltage with respect to a predetermined voltage value when the battery enters the closed state and correcting the initial set value in accordance with the detected variation of the battery voltage is employed.

[0008]

According to the present invention, the motor power can be varied by setting the initial set value of the counter variably in accordance with the state of the power supply voltage of the motor without using a means for correcting the pulse count value by calculation as in the prior art. The detection of the open / close position of the window following the change of the window can be performed.

[0009]

FIG. 1 shows an example of the configuration of an electric system in a power window device. Here, a driving motor M for a window glass opening / closing mechanism and a pulsar P which generates a pulse signal in synchronization with the rotation of the motor M are shown. And an open-direction drive relay RY1 for turning on and off the battery power BAT with the polarity that the motor M rotates forward and a closing direction drive for turning on and off the battery power BAT with the polarity that the motor M rotates reversely. The operation states of the relay RY2 and the power window operation master switches M and SW provided on the driver's seat side are read, and the energizing and deenergizing control of the opening direction driving relay RY1 or the closing direction driving relay RY2 is appropriately performed. And a control unit ECU that performs the control.

When the master switch M / SW is depressed by one step in the opening or closing direction and is operated to the manual position M, under the control of the control unit ECU, while the manual operation by the depression is performed, the switch is opened. By switching the control signal OCS in the direction or the control signal CCS in the closing direction from the previous high level to the low level, the relay coil of the opening direction driving relay RY1 or the closing direction driving relay RY2 is energized, and the motor M is turned on. The window glass is opened or closed by forward or reverse drive.

Further, when the master switch M / SW is pushed further in the opening or closing direction for a moment to operate the automatic position A, under the control of the control unit ECU,
Opening direction control signal OCS or closing direction control signal CCS
Is switched from the high level to the low level, thereby energizing the relay coil of the opening direction relay RY1 or the closing direction relay RY2 to drive the motor M to rotate forward or reverse. Then, the pulse signal PS generated from the pulser P with the rotation of the motor M is read, and the control signal OC in the opening direction until the window glass is fully opened or fully closed and the pulse signal PS is stopped.
S or the control signal CCS in the closing direction is held at a low level.

In the control unit ECU, an internal counter is initially set each time the window glass is fully closed by the control unit ECU.
The positive and negative of the drive motor M in the window glass opening / closing mechanism
The open / close position of the window glass is obtained by adding and counting the number of pulse signals generated from the pulsar P in accordance with the rotation in the reverse direction, and counting down.

Here, a pulse count of a few m is performed by performing a so-called two-pulse pulse count for generating two pulse signals having a phase difference of 90 degrees from the pulser P.
The open / close position of the window glass can be determined on the order of m.

In this case, in particular, in the present invention, as shown in FIG. 2, the characteristic of the initial set value of the counter according to the battery voltage when the window glass created based on the actually measured data is in the fully closed state is shown. A table is set in advance, the battery voltage when the window glass is fully closed is detected, the initial set value of the counter corresponding to the detected battery voltage is read from the table, and the counter is initially set. ing.

In the characteristics shown in FIG. 2, the position when the battery voltage is at a predetermined voltage value (13.5 V) and the window glass is fully closed is set to be an absolute reference (zero reference).

For example, due to this characteristic, the battery voltage drops to 11 V, the motor power decreases, and the rubber weather strip provided at the upper end of the window frame when the window glass is fully closed. When the bite amount at the tip of the window glass becomes small, the value of "3" is initially set in the counter. Also, when the battery voltage becomes 15 V and the motor power increases, the amount of bite of the window glass tip into the rubber weather strip provided at the upper end of the window frame when the window glass is fully closed increases. In this case, the value of "-2" is initially set in the counter.

Therefore, by setting the initial set value of the counter variably in accordance with the battery voltage state which is the main cause of the fluctuation of the motor power, the window glass is always not affected by the fluctuation of the motor power and always with respect to the absolute reference. Open / close position can be detected.

According to another embodiment of the present invention, in the control unit ECU, the position when the window glass is fully closed with the battery voltage at a predetermined voltage value (13.5 V) is defined as an absolute reference (0). After the initial setting of the counter is set to become the reference, the fluctuation of the battery voltage with respect to the predetermined voltage value when the window glass is fully closed is detected, and according to the detected fluctuation of the battery voltage. Means to correct the initial set value.

Specifically, according to the characteristics shown in FIG. 2, a correction value of the initial set corresponding to the variation ΔVx of the battery voltage is set in advance in a table, and the correction value corresponding to the detected variation of the battery voltage is set in advance. The initial set value is read from the table and corrected as an absolute reference according to the read correction value.

At this time, for example, when the detected variation ΔVx of the battery voltage is −2.5 V, the correction value of the initial set is “3”, and the variation ΔVx is +1.
The table is set so that the correction value of the initial set at 5 V is "-2".

In addition, a correction value of an initial set is set in advance in units of a predetermined variation of the battery voltage, without depending on the actual characteristics as shown in FIG. A correction value corresponding to the detected fluctuation of the battery voltage may be uniformly calculated, and the initial set value may be corrected using the calculated correction value.

At this time, for example, a battery voltage of 0.5 V
Is set so that the correction value at that time becomes 1 and the detected battery voltage fluctuation is-
The correction value at 1.5 V is calculated as “3”, and the correction value at the time when the detected battery voltage fluctuation is +1.0 V is calculated as “−2”.

[0023]

As described above, in the power window device according to the present invention, the counter is initially set when the window glass is fully closed, and the drive motor in the window glass opening / closing mechanism is rotated in the forward and reverse directions. The number of pulse signals generated according to the rotation is added by the counter.
When calculating the open / close position of the window glass by counting in the decreasing direction, the initial set value of the taunter can be set variably according to the battery voltage state which is a main factor of the motor power fluctuation, and the motor power can be set. Has the advantage that the open / close position of the window glass can always be detected with high accuracy without being affected by the change of the fully closed position of the window glass due to the fluctuation of the window glass.

[Brief description of the drawings]

FIG. 1 is an electric circuit diagram showing a configuration example of an electric system in a power window device according to the present invention.

FIG. 2 is a diagram illustrating an example of a characteristic of an initial set value of a counter with respect to a battery voltage when a window glass is in a fully closed state.

[Explanation of symbols]

 M Motor P Pulser RY1 Open direction drive relay RY2 Close direction drive relay M / SW Power window operation master switch ECU control unit

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 2E052 AA09 BA02 CA06 EA14 EB01 EC01 GA08 GA10 GB18 GC01 GD09 KA02 KA12 KA13 3D127 BB01 DF03 DF04 DF34 DF35 FF09 5H001 AA07 AB10 AB11 AC01 AC02 5H530 AA01 DD19A12 DD12

Claims (4)

[Claims] 1. A counter is initially set when a window glass is fully closed, and the number of pulse signals generated in accordance with forward and reverse rotations of a driving motor in a window glass opening / closing mechanism is determined by the counter. In a power window device in which the open / close position of the window glass is obtained by counting in the increasing and decreasing directions, the characteristics of the initial set value of the counter according to the battery voltage when the window glass is fully closed are set in advance in a table. In advance, a means for detecting the battery voltage when the window glass is fully closed, reading the initial set value of the counter corresponding to the detected battery voltage from the table, and initially setting the counter in the counter is adopted. A power window device, characterized in that: 2. A counter is initially set when the window glass is fully closed, and the number of pulse signals generated according to the forward and reverse rotation of the drive motor in the window glass opening / closing mechanism is determined by the counter. In a power window device in which the open / close position of the window glass is determined by counting in the increasing and decreasing directions, the position when the power supply voltage of the motor is at a predetermined voltage value and the window glass is fully closed is defined as a reference. After the initial setting of the counter is performed, the variation of the power supply voltage with respect to the predetermined voltage value when the window glass is fully closed is detected, and the initial setting is performed according to the detected variation of the battery voltage. A power window device characterized by taking a means for correcting a value. 3. A correction value of the initial set corresponding to the variation of the power supply voltage is set in a table in advance, and a correction value corresponding to the detected variation of the power supply voltage is read from the table, and the read correction value is added to the correction value. 3. The power window apparatus according to claim 2, wherein the initial set value is corrected. 4. A correction value of an initial set in units of a predetermined fluctuation of the power supply voltage is set in advance, a correction value corresponding to the detected fluctuation of the power supply voltage is calculated, and the calculated correction is calculated. 3. The power window device according to claim 2, wherein the initial set value is corrected uniformly with the value.