JP3283081B2 - Power window 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 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 Some vehicles have a power window device for raising and lowering a door glass by a driving force of a motor or the like. In this power window device, a motor is driven by operating a switch (door switch) provided on each door under the control of a microcomputer,
The door glass can be moved up and down (elevated).

Also, there are a manual switch and an automatic door switch. In the manual switch, the door glass can be driven only when the door switch is operated (turned on). In the automatic switch, the door switch is temporarily turned on. When operated (ON), the door glass is automatically driven until fully closed or fully opened even if it is not operated (OFF) thereafter.

Here, especially in the case of automatic operation, it is necessary to stop the driving of the motor by detecting that the door glass has been fully closed or fully opened. Therefore, a pulse encoder for generating a pulse according to the rotation of the motor is provided, and the number of pulses when the door glass is fully closed and fully opened is stored in the RAM of the microcomputer as an initial condition.
When the door glass is driven, the count number of the pulse signal from the pulse encoder is increased / decreased. Therefore, when the increased / decreased pulse count coincides with the pulse number corresponding to the fully closed or fully opened state stored in advance, the door glass is fully opened. It can be determined that the motor is closed or fully open, and the driving of the motor is stopped. In addition,
By judging whether the motor is fully closed or fully opened based on the count number of such pulses, it is possible to detect entrapment due to overcurrent of the motor, and to use the device together with an entrapment prevention device that immediately stops or reverses the driving of the motor at that time. .

[0005]

However, in a vehicle, when the ignition switch is turned off, the conduction to the microcomputer is shut off by the power window relay. The number of pulses corresponding to closing and fully opening will be erased. For this reason, it is necessary to always supply a current to the microcomputer regardless of whether the ignition switch is on or off, and a dark current flows.

When the battery of the vehicle is replaced, the power to the microcomputer is completely shut off. Therefore, after the replacement of the battery, the door glass is fully closed and fully opened, and the current value is input with the pulse number and the like as initial values. It has to be done again, which complicates complicated work.

In view of the above facts, the present invention provides a power window control device capable of retaining stored contents regardless of turning on / off an ignition switch, replacing a vehicle battery, etc., and saving the trouble of re-input. That is the purpose.

[0008]

According to a first aspect of the present invention, a door is moved up and down by driving a motor in accordance with an instruction from an instruction means, and a pulse is generated in accordance with the rotation of the motor. A power window control device for stopping the driving of the motor regardless of the instruction of the instruction means when the count number of the pulse indicating the glass position matches the pulse number corresponding to the fully closed and fully opened door glass, Charging / discharging means which is charged during energization and discharges for a predetermined time immediately after the energization cutoff, and stores the number of pulses in the fully closed and fully open states and indicates the current position of the door glass during the discharge immediately after the energization shutoff An electrically rewritable ROM (EEPROM) for storing the number of pulses.

[0009]

According to the first aspect of the present invention, when the elevating and lowering of the door glass is instructed by the instruction means, the driving of the motor is started and the door glass is raised and lowered. Here, a pulse is generated in accordance with the drive of the motor, and when the count number of this pulse matches the previously stored pulse number of fully closed or fully opened, it is determined that the door glass is fully closed or fully open, and the motor is driven. Driving is stopped. Such an operation is particularly applied to an automatic operation (an operation in which once the operation of the instruction means is performed, the elevating operation is continued without any further operation), and the driving of the motor is automatically and appropriately stopped. Can be.

Here, since the number of pulses corresponding to the fully closed or fully opened state is stored in an electrically rewritable ROM (EEPROM), in the vehicle, the ignition switch is turned off, or the battery itself is removed and the power is turned on. Is not erased, the stored contents are not erased, the dark current for retaining the stored contents is eliminated, and the re-input operation is not required.

[0011] Further, at the time of the above-mentioned energization interruption, the energization is continued for a predetermined time immediately after the energization interruption by the charging / discharging means.
During this time, the pulse count indicating the current position of the door glass is stored. Thereby, the position of the door glass at the time of restart of energization can be accurately recognized.

[0012]

FIG. 2 shows a door 12 on the driver's seat side of a vehicle to which the power window device 10 according to the present embodiment is applied, and one door 14 of a rear seat. In each door (in FIG. 3, the inside of the driver's seat door 12 is shown), a window regulator section 16 for driving the door glass 20 up and down is provided.

As shown in FIG. 3, the window regulator section 16 is of a so-called wire type in this embodiment, and is a rotary plate 2 mounted on a drive shaft of a motor 22.
A wire is wound around 2A. The end of this wire is the holding channel 2 that supports the lower end of the door glass 20.
4, and the holding channel 24 is attached to the main guide 26 so as to be vertically movable.
Thus, when the motor 22 rotates in the forward and reverse directions, this rotational driving force is transmitted via the wire, and the door glass 2 is rotated.
0 moves up and down along the glass guide 18. The configuration of the window regulator section 16 is not limited to such a wire type, but may be an X-arm type or a so-called motor self-propelled type in which the motor itself moves along a rack.

When the door glass 20 is raised by the motor 22, the peripheral end of the door glass 20 is fitted to 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.

The motor 22 is connected to the door 12 shown in FIG.
Power window master switch 3 mounted on 14
0 and the door switch 32 are operated. The door switch 32 is attached to the door 14 other than the driver's seat side, and the power window master switch 30 is attached to the door armrest portion 12B of the door 12 on the driver's seat side. In this embodiment,
The mounting position of the power window master switch 30 may be another position as long as the position can be easily operated by the driver sitting in the driver's seat.

The power window master switch 30 includes an auto / manual switch 34 for operating the motor 22 of the door 12 automatically or manually and a door switch 36 (manual) for individually operating the motor 22 of each door 14 individually. 3 in the embodiment). The power window master switch 30
The motor 22 is operated when the door switches 32 and 36 are operated.
Is provided with a lock switch 38 for preventing the drive from being driven.

As the automatic / manual switch 34, for example, a switch which can be operated in two steps in both directions can be applied.
In the case of the single-stage operation, the motor 22 of the door 12 is driven only during the operation (manual operation), and the motor 22 is driven by the two-stage operation until the door glass 20 reaches a predetermined position even if the hand is released from the switch. (Automatic operation).

When the power window master switch 30 or the door switch 32 is operated, the motor 22 is driven to rotate the rotating plate 22A (shown in FIG. 3) in either the forward or reverse direction, and raise the door glass 20. Or can be lowered. The power window master switch 30
The anti-jamming mechanism for stopping or reversing the drive of the motor 22 when the motor current when the door glass 28 rises and an abnormal current is detected or when a predetermined number of pulses are counted under predetermined conditions. It may be provided.

FIG. 1 shows a control unit 50 for controlling the driving of the motor 22 by operating the automatic / manual switch 34. The operation of the door switch 32 is the same as that of the door switch 32, and therefore will not be described.

The auto / manual switch 34 is provided in the control unit 50 with a manual up on / off switch 52A.
And an on / off switch 52B for manual down, as well as an on / off switch 52C for automatic switching interlocked by two-stage operation of the auto / manual switch 34 as described above.

Each of the on / off switches 52A, 52B, 52
One end of C is connected to the input terminal of the microcomputer 56, and the other end is grounded, so that the on / off switches 52A, 52B, and 52C are electrically connected to lift the door glass. That is, the input terminal of the microcomputer 56 and the on / off switch 52
A, 52B, and 52C are connected to a power supply line 60 of a reference voltage (+5 V) via resistors 58, respectively.
When the on / off switches 52A, 52B, 52C are off, the microcomputer 56 outputs a high level (+
5V) is input, and a low-level (0 V) signal is input to the input terminal of the microcomputer 56 by turning on any of the on / off switches.

The microcomputer 56 determines that the corresponding on / off switch has been turned on by the input of the low level signal, and drives the motor 22 according to the on / off switch.

The microcomputer 56 has a power supply (+5) for operating the microcomputer 56 itself.
V) has been input.

The power supply circuit 62 is energized by a battery 102 via an ignition switch 100. The power supply circuit 62 is provided with an IGOFF detection output terminal 62A for detecting that the energization from the ignition switch 100 has been cut off, and is input to the microcomputer 56.
Further, one end of a backup capacitor 104 is connected to a downstream side of the power supply circuit 62 (an intermediate portion of a connection line with the microcomputer 56). The other end of the backup capacitor 104 is grounded. The backup capacitor 104 is charged by power supply from the power supply circuit 62 and has a role as a charge / discharge unit that discharges for a predetermined time when the power supply is stopped.

The motor 22 has two ends at each end.
It is connected to the secondary side common terminal 70A of the circuit relay switch 70. The secondary first contact 70B of the two-circuit relay switch 70 is connected to a + B (12V) power supply,
Contact 70C is grounded. The primary side of the two-circuit relay switch 70 is provided with a coil 72, respectively.
The secondary contact is configured to be switched by excitation and non-excitation of the coil 72. That is, in the non-excited state of the coil 72, both the secondary sides are switched to the second contact 70C, and when one of the coils 72 is excited, the motor 22 rotates forward (up the door glass) and reversely rotates. (The door glass descends).

One end of the coil 72 is + B (+12 V)
The other end is connected to the output terminal of the microcomputer 56, and the excitation and non-excitation of the coil 72 is controlled by the microcomputer 56 in accordance with the operation of the auto / manual switch 34.

Here, a pulse encoder 106 is provided near the motor 22. The pulse encoder 106 outputs a pulse signal according to the drive (rotation) of the motor 22, and the pulse signal is input to the microcomputer 56. The microcomputer 56 counts the input pulse signals. In the present embodiment, the count-up is performed by raising the door glass 20, and the count-down is performed by lowering the door glass 20.

The microcomputer 56 has EE
PROM108 (electrically erasable programmable
Abbreviation for ROM, EAROM [electrically alterable
ROM]). This EEPROM
Reference numeral 108 denotes an electrically rewritable ROM, which is a so-called non-volatile memory capable of retaining stored contents even in a non-energized state. In the EEPROM 108, the pulse numbers corresponding to the fully closed and fully opened door glasses 20 are stored as initial values in the vehicle production stage. For this reason, the count number of the pulse signal from the pulse encoder 106 and E
By comparing the number of fully-closed or fully-opened pulses stored in the EPROM 108 with that of the door glass, it is possible to determine that the door glass is fully closed or fully open. Is controlled.

Therefore, even when the power supply from the power supply circuit 62 is cut off, the number of pulses corresponding to the fully closed or fully opened door glass 20 is not erased, and the EEEO is not performed.
It is held in M108. Further, in the present embodiment, when the ignition switch 100 is turned off, the pulse count indicating the current position of the door glass 20 is changed to EEPRO in accordance with the signal from the IGOFF detection output terminal 62A.
M108. In this case, the backup capacitor 1 is not used until the count of the pulse number indicating the position of the door glass 20 is stored until the power supply is cut off.
Since the power is supplied by the discharge from the power supply circuit 04, the storage process is reliably performed.

Next, the operation of this embodiment will be described. When the ignition switch is turned on, the power window device 10 of the vehicle applied to this embodiment has a power supply voltage (+12 V) for driving the motor 22 and a power supply voltage (+5 V) for operating the microcomputer 56 itself when the ignition switch is turned on. Is input, and the process shown in the flowchart of FIG. 4 starts. Hereinafter, the operation of the door glass 20 will be described with reference to the flowchart shown in FIG.

When the door glass 20 is to be manually lifted, the manual up / off switch 52 is turned on in step 200, and an affirmative determination is made.
Then, the process proceeds to step 2 to rotate the motor 22 forward. Thereby, the door glass 20 starts to rise. In the next step 204, since the automatic switching on / off switch 52C is in the off state, a negative determination is made and the process returns to step 200. Thereafter, when the manual up on / off switch 52A is in the on state, steps 200, 202, and 204 are repeated.

Next, when the hand is released from the manual-up on / off switch 52A, the switch is turned off, and a negative determination is made in step 200, and the process proceeds to step 206. In step 206, since the flag F is reset (0), a negative determination is made, and the routine proceeds to step 208. In step 208, the drive of the motor 22 is stopped, and after the flag F is reset in step 210 (at this time, the flag F is in a reset state), the process proceeds to step 212.

At step 212, it is determined whether or not the manual-down on / off switch 52B is turned on.
Move to. In step 214, since the flag F has been reset, a negative determination is made and the process proceeds to step 216, where the driving of the motor 22 is stopped (at this time, the motor 2
2 has already been stopped).
Is reset, and the process returns to step 200.

Thereafter, when there is no operation of the switch while the power is on, the on / off switch 52A for manual up is used.
(Step 200) or Steps 200, 206, 208, 210, 212, 21 until the on / off switch 52B for manual down (Step 212) is operated.
4, 216 and 218 are repeated (basic flow).

Next, when the door glass 20 is to be lowered manually, the manual down on / off switch 52B is turned on in step 212, and the affirmative determination is made, and the process proceeds to step 220 to reverse the motor 22. Thereby, the door glass 20 starts to descend. In the next step 222, since the automatic switching on / off switch 52C is in the off state, a negative determination is made and the process returns to step 212. Thereafter, the manual down on / off switch 52
When B is in the ON state, steps 212, 220, and 222 are repeated.

Next, when the hand is released from the manual down on / off switch 52B, the switch is turned off, and the above-described flow when the power is on and the switch is not operated (basic flow).

Here, when the door glass 20 is automatically raised, the automatic / manual switch 34 is operated in two steps (the automatic switching on / off switch 52).
C is turned on), after the start of normal rotation of the motor at step 202, an affirmative determination is made at step 204, the process proceeds to step 224, the flag F is set (1), then the process proceeds to step 225, and the pulse count from the pulse encoder 106 is counted. The number Pc is read, and then in step 226 the EEPROM
After reading out the pulse number Pu corresponding to the fully closed state stored in the memory 108, the two are compared in step 227 (P
c: Pu) If Pc <Pu in step 227, the process proceeds to step 212 to determine whether the auto / manual switch 34 has been operated to the manual down side. That is, even when the automatic ascent is being performed, when the manual down on / off switch 52B is turned on, the motor 22 is immediately rotated in the reverse direction, and the operation shifts to the manual down operation described above.

If a negative determination is made in step 212, the automatic operation is continued, and the routine proceeds to step 214. In step 214, since the flag F is set, an affirmative determination is made, and the process returns to step 225.
226, 227, 212, 214 are repeated. here,
If it is determined in step 227 that Pc ≧ Pu, it is determined that the door glass is in the fully closed state, and the process proceeds to step 208 to stop driving the motor 22.
Reset. Thereafter, the above-described basic flow is performed.

When the door glass 20 is to be automatically lowered, the auto / manual switch 34 is operated in two stages, so that the affirmative determination is made in step 222 after the normal rotation of the motor is started in step 220, and the process proceeds to step 228. , The flag F is set (1), and the routine proceeds to step 230, where the pulse count number Pc from the pulse encoder 106 is read out.
After reading out the pulse number Pd corresponding to the fully opened state stored in M108, the two are compared at step 234 (P
c: Pd).

If it is determined in step 234 that Pc> Pd, the process proceeds to step 200, where it is determined whether the auto / manual switch 34 has been operated to the manual up side. That is, when the manual up on / off switch 52A is turned on even during automatic lowering, the motor 22 is immediately rotated forward, and the operation shifts to the manual up operation described above.

If a negative determination is made in step 200, the automatic operation is continued, and the routine proceeds to step 206. In step 206, since the flag F is set, an affirmative determination is made, and the process returns to step 230.
232, 234, 200, 208 are repeated. here,
If it is determined in step 234 that Pc ≦ Pu, it is determined that the door glass is fully opened, and the flow shifts to step 216 to stop driving the motor 22, and in step 218, the flag F
Reset. Thereafter, the above-described basic flow is performed.

Here, when a signal is input from the IGOFF detection output terminal 62A of the power supply circuit 62, the above-mentioned routine is interrupted, and the routine proceeds to a door glass position storing routine shown in FIG. That is, conventionally, when the power supply to the microcomputer 56 is cut off by turning off the ignition switch 100 or removing the battery 102, the current position of the door glass becomes unknown, and it is necessary to input the initial state at the time of restart. However, in this embodiment, the discharge of the backup capacitor 104 is started at the same time when the power supply from the power supply circuit 62 is cut off, and the processing of the flowchart shown in FIG. 5 is performed.

As shown in FIG. 5, in step 250, the current pulse count from the pulse encoder 106 is read, and then in step 252, the read count Pc is stored in the EEPROM 108 and the process is terminated.

During this process, the backup capacitor 1
Since the power is supplied by the power supply circuit 04, the processing can be performed without the power supply from the power supply circuit 62.

As described above, the ignition switch 10
Every time the power supply to the microcomputer 56 is cut off by turning off the battery 0 and removing the battery 102, the dark current can be eliminated by storing the current pulse count indicating the position of the door glass 20. Any operation such as input of an initial value when power supply is restarted can be omitted.

The EEPROM 1 applied to the present embodiment
In 08, that the structure of the memory cell using an insulating gate oxide film, or a gate oxide film of the MOS transistors any of those having the S _i O ₂ and S _i N structure substituted 2-layered film of ₄ The number of write / erase cycles is 1
Since it is possible up to about 0 ^6, there is no problem in the application of the vehicle.

[0047]

As described above, the power window control apparatus is excellent in that the stored contents can be retained irrespective of the turning on / off of the ignition switch, the replacement of the battery of the vehicle, etc., and the trouble of re-input can be saved. Has an effect.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a power window device according to an embodiment.

FIG. 2 is a schematic perspective view showing a part of a vehicle door applied to the embodiment.

FIG. 3 is a schematic perspective view showing a window regulator section of a door.

FIG. 4 is a flowchart showing the operation of the power window device.

FIG. 5 is a flowchart showing a routine that is interrupted when power is cut off.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Power window apparatus 12, 14 Door 20 Door glass 22 Motor 34 Auto / manual switch 50 Control part 56 Microcomputer 62 Power supply circuit 62A IGOFF detection output terminal 100 Ignition switch 102 Battery 106 Pulse encoder 108 EEPROM

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) E05F 15/10-15/16

Claims (1)

(57) [Claims] 1. A door motor is driven up and down by driving a motor in accordance with an instruction from an instruction means, and a pulse is generated in accordance with the rotation of the motor. A power window control device for stopping the driving of the motor regardless of the instruction of the instruction means when the number of pulses corresponding to the fully closed and fully opened states is charged during the energization and a predetermined time immediately after the interruption of the energization. Charging / discharging means for discharging time, and an electrically rewritable ROM for storing the number of pulses in the fully closed and fully open states and for storing the number of pulses indicating the current position of the door glass during the discharge immediately after the cutoff of the power supply ( EEPRO
M).