JPH0655933A - Power window driving control device - Google Patents

Abstract

PURPOSE:To provide a power window driving control device by which foreign material insertion and full closure can be separated exactly from each other without arranging a full closure switch and workability in inletting door glass or a regulator can be improved when motor driving is controlled by changing a motor driving electric current. CONSTITUTION:A projecting part 15D whose intermediate part being in a raising and lowering direction of door glass 11 is projected in a lip part 15B direction, is formed integrally in a lip part 15C, and resistance force is applied when the door glass is raised or lowered. When this resistance force exceeds a threshold value, the force to the door glass 11 being lowered is stronger than the force to lower the door glass by means of driving torque of a motor. Thereby, when a driving electric current (differential value) exceeds a threshold value in a full closure condition, the door glass 11 is not lowered, and can maintain the full closure condition.

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 vertically moving a door glass of a vehicle by a driving force of a motor.

[0002]

2. Description of the Related Art Generally, a manual switch and an automatic switch are provided as a power window switch on the driver's side.

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, the movement is blocked by the window frame or the like, so that the drive current of the motor increases. When the drive current exceeds a predetermined value, the drive of the motor is stopped.

By the way, it has been considered that when a foreign substance is present on the upward movement locus of the door glass, an abnormal current due to the foreign substance being caught is detected to stop or reverse the driving of the motor. In this case, in order to distinguish from the current increase at the time of fully closing, it is necessary to provide a fully closing switch for detecting that the door glass is in the vicinity of fully closing.

[0005]

However, a space for providing the fully closed switch is required, and the number of steps for assembling the door glass and the regulator is increased, which complicates the work.

In consideration of the above facts, the present invention can reliably distinguish between foreign object entrapment and full closure when a motor drive is controlled by a change in motor drive current, without providing a full-close switch. An object of the present invention is to obtain a power window drive control device capable of improving the workability of assembling a door glass or a regulator.

[0007]

According to a first aspect of the present invention, there is provided a power window drive control device for vertically moving a door glass of a vehicle by a driving force of a motor, which is used when the door glass is raised by driving the motor. A motor drive current detecting means for detecting a current, a current change amount calculating means for calculating a change amount of the current value detected by the motor drive current detecting means, and the motor when the current change amount exceeds a predetermined value. A drive control means for reversing the drive of the door with a low torque for a predetermined time, and a holding member for holding the door glass with a resistance force stronger than the force when the door glass descends in the drive torque of the motor reversed by the drive control means. Have

[0008]

According to the first aspect of the invention, the motor drive current is detected by the motor drive current detecting means, and the detected change amount of the drive current is calculated by the current change amount calculating means.
That is, the differential value of the detected drive current is calculated. When this differential value exceeds a predetermined value, it is regarded as an abnormal current, and the drive control means reverses the drive of the motor.

Incidentally, the drive current (differential value) of the motor exceeding the predetermined value occurs not only when the foreign matter is caught but also when the motor is fully closed. Therefore, in the invention of claim 1, the driving torque at the time of reversing of the motor is lowered, the door glass is lowered with a weak force, and the holding member strongly resists the fully closed door glass (at the driving torque of the motor). The force is stronger than the door glass lowering force). As a result, even if the door glass is lowered in the fully closed state, the door glass is not lowered by the resistance of the holding member, and the fully closed state can be maintained.

As described above, since it is not necessary to detect the fully closed state by another means (for example, the fully closed switch or the like), the workability of assembling the door glass and the regulator is improved.

[0011]

1 is a circuit diagram of a power window drive controller 10 according to this embodiment.

Both ends of the power window driving motor 12 have first and second relay circuits 14 and 16 (2), respectively.
The contacts are connected to the common terminals 14A and 16A.
The first relay circuit 14 includes the door glass 11 (see FIG. 4).
The first contact point 14B is for raising, and the first contact point 14B has a small resistance (about 10 m).
Ω) 18 is grounded. Also, the second contact 1
4C is connected to the power supply line 20. In the first relay circuit 14, when the first coil 22 is not excited, the first relay circuit 14 is switched to the first contact 14B side.
Is excited, it switches to the second contact 14C side.

On the other hand, the second relay circuit 16 is for lowering the door glass 11, and the first contact 16B has the minute resistance 1
It is grounded through 8. The second contact 16C is connected to the power supply line 20. This second relay circuit 1
No. 6 is switched to the first contact 16B side when the second coil 24 is not excited, and is switched to the second contact 16C when the second coil 24 is excited. There is.

One ends of the first and second coils 22 and 24 are connected to the power supply line 20, and the other ends thereof are NP.
It is connected to the collector terminals 26C and 28C of the N-type first and second transistors 26 and 28.

Here, one end of a switch 30 for manually raising the door glass 11 is connected between the first coil 22 and the first transistor 26, and the other end is grounded. Therefore, by turning on the manual raising switch 30, the first coil 22 is excited, the first relay circuit 14 is switched to the second contact 14C, and the motor 1
The door glass 11 can be raised by rotating 2 normally.

Also, between the second coil 24 and the second transistor 28, one end of the manual lowering switch 32 of the door glass 11 is connected, and the other end is grounded. Therefore, by turning on the manual lowering switch 32, the second coil 24 is excited, the second relay circuit 16 is switched to the second contact 16C, and the motor 12
Can be reversed to lower the door glass 11.

The emitter terminals 26E and 28E of the two transistors 26 and 28 are grounded,
The base terminals 26B and 28B are input to the controller 33. The controller 33 can output a predetermined signal to each of the base terminals 26B and 28B, and the transistor 2 can be output by the output of this signal.
Currents flow from the collector terminals 26C and 28C to the emitter terminals 26E and 28E, and the reference numerals 6 and 28 can be turned on. That is, it has the same function as the functions of the manual raising and lowering switches 30 and 32.

A signal line 34 for detecting a motor current is branched from the end of the minute resistor 18 on the power supply line 20 side. The signal line 34 is connected to the non-inverting input terminal 40A of the amplifier 40 via the resistors 36 and 38. In addition, resistance 3
One end of the electrolytic capacitor 42 is connected between the resistor 6 and the resistor 38, and the other end is grounded to form a filter unit 44. The inverting input terminal 40B of the amplifier 40 is grounded via the resistor 46. Also, the amplifier 40
The output terminal 40C is connected to the inverting input terminal 40B via the feedback resistor 48, and constitutes the amplifier circuit section 50.

Further, the output terminal 40C of the amplifier 40 is
It is connected to the controller 33 via the capacitor 52 and the resistor 54. Since the differentiation circuit section 60 is composed of the capacitor 52 and the resistor 62, the controller 33
The differential waveform of the drive current of the motor 12 is input to.

Further, a signal line directly connected to the controller 33 is also connected to the output terminal 40C so that the current value can be input, and the generation timing of the inrush current and the fully closed current is outside the determination timing. It is for detecting the timer start time for providing the blanking period.

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.

The controller 33 receives the drive current of the motor 12 and the differential waveform of this drive current from the A / D converter 9
It has been input via 8. A signal for turning on the transistors 26 and 28 is output from the input / output port 94.

Further, the input / output port 94 is supplied with an auto signal for instructing the automatic movement of the door glass 11 up and down. This auto signal is sent from the power line 20 to the resistor 93.
And a branch line 97 that branches from between the resistor 93 and the auto switch 95 in the signal line grounded to the ground via the normally open type auto switch 95. That is, the auto switch 95
When is on (when operating), no current flows through the branch line 97, and when the auto switch 95 is off (when not operating), a predetermined current is input. The auto switch 95
It is mechanically interlocked with the manual raising and lowering switches 30 and 32. For example, the manual raising switch 3
If the manipulated variable of 0 is small, the manual raising switch 30 is turned on,
The auto switch 95 is turned off, and both are turned on when the operation amount is large.

In the controller 33, the auto switch 9
Once the transistor 5 is turned on, the transistors 26 and 28 are controlled so as to always output an on signal. This allows
Even if the operator releases his / her hand from the switch, the door glass 11 can be continuously raised or lowered.

A threshold value for comparison with the differential waveform input from the A / D converter 98 is stored in the RAM 90. For example, the CPU is operated while the door glass 11 is rising.
In 88, the input signal is compared with this threshold value, and when it is determined that the input signal is large (current more than the specified value), it is determined that a foreign object is trapped while the door glass 11 is rising, and the first transistor 26 is detected. Output of the ON signal is stopped and the ON signal is output to the second transistor 28 for lowering the door glass 11 (see FIG. 3).

Also, when the door glass 11 is fully closed, a current exceeding the specified value flows, the output of the ON signal to the first transistor 26 is stopped, and the ON signal is output to the second transistor 28. It is supposed to be done.

Here, in the power window drive control device of the present embodiment, the drive of the motor 12 is reversed by comparison with the threshold value (transition from the rise of the door glass 11 to the fall).
If so, the drive torque during this reversal is lowered.
As a means for reducing the drive torque, a signal sent from the controller 33 to the voltage control unit 33A is turned on and off to switch the voltage applied to the motor 12 to the chopper output (intermittent output). The signal from the controller 33 is a chopper output when the signal is on, and is a normal output when the signal is off.

On the other hand, as shown in FIG. 4, the door glass 1
A weather strip 15 serving as a holding member of the present invention is attached to the door frame 13 corresponding to the upper end of 1.

The weather strip 15 is composed of a base portion 15A and a pair of lip portions 15B and 15C. The base portion 15A is made of soft rubber and has a substantially triangular cross section with a hollow inside.

On the other hand, the lip portions 15B and 15C are integrally formed and extend downward from both widthwise ends of the base portion 15A. The facing gap between the lip portions 15B and 15C substantially corresponds to the thickness dimension of the door glass 11, and when the door glass 11 is in the fully closed state, the lip portion 15B is closed.
The upper end portion of the door glass 11 is adapted to enter the facing gap of B and 15C. When the door glass 11 is in the fully closed state, the lip portions 15B and 15C cover the upper end peripheral edge of the door glass 11 from both front and back surfaces thereof.

One of the lip portions 15B and 15C (lip portion 15C in this embodiment) has a middle portion in the vertical direction (up and down direction of the door glass 11) and the other lip portion (lip portion 15C).
The convex portion 15D protruding in the B direction is integrally formed. By this convex portion 15D, a resistance force is applied when the door glass 11 is moved up and down.

This resistance force is stronger than the force for lowering the door glass 11 by the driving torque of the motor 12 when the door glass 11 is lowered when the threshold value is exceeded. Therefore, when the drive current (differential value) exceeds the threshold value in the fully closed state, the door glass 11 is not lowered and the fully closed state is maintained.

The operation of this embodiment will be described below. First,
When manually raising the door glass 11, by operating the manual raising switch 30 with a small operation amount,
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 side, the motor 12 rotates normally. This allows the door glass 1
1 goes up. When the operation of the manual raising switch 30 is stopped at the desired position, the driving of the motor 12 is stopped and the raising of the door glass 11 is stopped.

On the other hand, when the door glass 11 is lowered, the second coil is excited and the second relay circuit 16 is switched to the second contact 16C side by operating the manual lowering switch 32. The motor 12 is reversely rotated and the door glass 11 is lowered.

Next, when the manual raising switch 30 is operated with a large operation amount, the automatic switch 95 is turned on together with the manual raising switch 30. The processing procedure when the auto switch 95 is turned on will be described below with reference to the flowchart of FIG.

When it is confirmed in step 100 that the auto switch 95 is turned on, in step 104, the door glass 1
An ON signal is output to the first transistor 26 for increasing the value by 1. As a result, even if the hand is lifted from the manual raising switch 30, the excitation of the corresponding first coils 22 and 24 is continued, and the movement of the door glass can be continued.

In the next step 105, it is judged whether or not it is during the blanking period. This is because the threshold value may be exceeded due to the inrush current at the initial stage of switch-on, resulting in erroneous detection. Therefore, no comparison is made for a certain period from the initial stage of switch-on. If it is determined in step 105 that the blanking period has passed, the process proceeds to step 106 to capture the differential waveform of the drive current of the motor 12, and then in step 108, the threshold value previously stored in the RAM 90 is read. In the next step 110, it is judged whether or not the differential waveform taken in exceeds the threshold value, and in the case of negative judgment, the output of the ON signal is continued as it is, and step 1
The process proceeds to 06, the next differential waveform is fetched, and steps 106, 108, and 110 are repeated. Here, if it is determined in step 110 that the threshold value has been exceeded, it is determined that an actual foreign object is trapped or the door glass 11 is fully closed, and the process proceeds to step 112 to transfer the first transistor 26 to the first transistor 26. Stop the output of the ON signal, and step 114
Then, the voltage applied to the motor 12 is turned on to turn on the chopper output, and then the on signal to the second transistor 28 is output in step 116.

Here, the motor 12 has a low torque due to the chopper output, and when the door glass 11 is fully closed,
Since the convex portion 15D has a larger holding force for the door glass 11, the door glass 11 is not lowered. Therefore, the fully closed state can be maintained.

In the next step 118, it is judged whether or not a predetermined time has elapsed, and if an affirmative judgment is made, step 1
At 20, the output of the ON signal to the second transistor 28 is stopped, then at step 122, the chopper output is turned off, and the process proceeds to step 100.

As described above, in the present embodiment, the door glass 11 is moved to the lip portion 15 of the weather strip 15 in the fully closed state.
Means for distinguishing between entrapment of foreign matter and fully closed by holding B and 15C and lowering the torque during reverse driving of the motor 12 (for example, providing a fully closed switch)
No longer needed. For this reason, the number of man-hours for assembling the door glass 11 and the window regularata is reduced, and the work efficiency is improved. Also, the number of parts is reduced, which leads to cost reduction.

In this embodiment, in order to reduce the driving torque of the motor 12, the applied voltage is chopper-outputted, but the means may be a relay circuit or a semiconductor. Good.

[0042]

As described above, the power window drive control device according to the present invention can accurately and accurately determine whether an abnormal current due to noise or an abnormal current due to entrapment of a foreign object, and unnecessary operation of the motor. It has an excellent effect of being able to prevent.

[Brief description of drawings]

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

FIG. 2 is a control flowchart.

FIG. 3 is a characteristic diagram showing a differential waveform (foreign matter entrapment) of the drive current of the power window drive control device.

FIG. 4 is a sectional view showing a structure of an upper end portion of a door glass.

[Explanation of symbols]

 10 Power Window Drive Control Device 11 Door Glass 12 Motor 15 Weatherstrip 33 Controller 60 Differentiation Circuit Unit 95 Auto Switch

Claims (1)

[Claims] 1. A power window drive control device for vertically moving a door glass of a vehicle by a driving force of a motor, the motor drive current detecting means for detecting a current when the door glass is raised by driving the motor, and the motor. Current change amount calculation means for calculating the change amount of the current value detected by the drive current detection means, and drive control means for reversing the drive of the motor with a low torque for a predetermined time when the current change amount exceeds a predetermined value. And a holding member for holding the door glass with a resistance force stronger than the force when the door glass descends in the drive torque of the motor reversed by the drive control means.