JPH10331523A - Power window control device for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To stop the closing drive of a window or drive the window in the reverse direction when foreign matter is caught between a window frame and the upper end of a window by controlling the window to be once driven in the reverse direction or stopped when the pulse duration of a pulse signal becomes larger than a designated value before the count value reaches a designated value. SOLUTION: A CPU 11 judges whether a battery 3 is removed or not. In the case where the battery 3 is removed and the count value once becomes an indefinite value, when a main switch SW5 is operated, the car window is lowered to the lower end to take the count value corresponding to the position to be 0, the count value corresponding to the upper end is supposed to be a preset designated value, and when the pulse duration of a pulse signal becomes larger than a designated value before it reaches the designated count value, a motor 7 is controlled to be driven in the reverse direction. Thus, even if foreign matter is caught in the car window at the time of raising the car window, the car window is switched from the rising drive to the lowering drive.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power window device for a vehicle, and more particularly, to a power window device for a vehicle capable of switching a drive window from an upward drive to a downward drive when a foreign object is caught in the vehicle window.

[0002]

2. Description of the Related Art Conventionally, as a power window device for a vehicle, when a window provided in a vehicle is driven to open and close using a motor, a rotation angle of the motor is converted into a pulse signal using an encoder, and the window is opened. There is known a device that detects the degree of opening and closing as a count value of a pulse signal.

More specifically, when counting a pulse signal output from an encoder by a counter, a count value representing the degree of opening and closing of a window is arranged on a real straight line having a specific value as an origin. By determining how many current count values are present, the degree of closing of the window is determined.

[0004] Conventionally, in a vehicle power window device, when a motor is driven to close a window to close the window,
The load applied to the motor was detected. For this reason, when a foreign object is caught between the window frame and the upper end of the window and the overload occurs, the window closing drive is controlled to be stopped or reversed, so that the foreign object is caught in the window. There was an advantage that even if it was taken out, it could be taken out immediately.

[0005]

However, if the battery that supplies power to the motor is removed, the correspondence between the actual opening / closing degree of the window and the count value will be undefined. While this correspondence is in an indefinite state, for example, when the motor is driven to close the window, when a foreign object is caught between the window frame and the upper end of the window, the output of the encoder is
It was indistinguishable whether the window reached the upper end or whether a foreign object was caught. Therefore, in this case, the stop of the window closing drive or the reversal drive was prohibited, so that it was not possible to control the stop of the window close drive or the reversal drive.

[0006] The present invention has been made in view of the above,
It is an object of the present invention to provide a power window device for a vehicle capable of stopping or reversing the drive for closing a window even when a battery for supplying power to a motor for opening and closing a window provided in a vehicle is removed. Is to provide.

[0007]

According to the first aspect of the present invention,
In order to solve the above-mentioned problem, a motor provided in a vehicle for opening and closing an opening / closing body is provided, and an encoder for converting a rotation angle of the motor into a pulse signal is provided. When the battery that supplies power to the motor is detached, the count value when the opening and closing body is fully opened is set to zero, and when the battery is fully closed when the opening and closing body is fully closed. Initialization means for assuming the count value of the predetermined value as a predetermined count value, and when the pulse width of the pulse signal becomes larger than a predetermined value before reaching the predetermined count value, the motor is driven in reverse or stopped. And a control means for performing the control.

[0008]

According to the first aspect of the present invention, when the battery for supplying power to the motor is removed and the count value once becomes an indefinite value, the count value when the opening / closing member is fully opened is set to zero. When the pulse width of the pulse signal becomes larger than the predetermined value until the count value reaches the predetermined count value, assuming the count value when the opening and closing body is fully closed as the predetermined count value, By controlling to reverse drive or stop, even when the battery is removed and the count value becomes indefinite, when foreign matter is caught between the window frame and the upper end of the window and overloaded, The closing drive of the window can be stopped or inverted.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a diagram showing a system configuration of a vehicle power window device according to an embodiment of the present invention. As shown in FIG. 1, the vehicle power window device includes a battery 3 for supplying power to the device, a main switch 5 for inputting an operation signal for driving the vehicle window up or down, and a motor 7 for driving the vehicle window up and down. An encoder 9 for converting the rotation angle of the motor 7 into a pulse signal; a CPU 11 for controlling an operation signal from the main SW 5 and an opening / closing control signal output to the switching circuit 15 in response to the pulse signal from the encoder 9; And a switching circuit 15 for switching the direction of the current supplied to the motor 7 in accordance with the vehicle window opening / closing control signal.

The main switch 5 shown in FIG. 1 is composed of a switch SWA and a switch SWB of an integral structure. The switch SWA has a one-touch mechanism for automatically continuing to drive the vehicle window until lifting or lowering is completed even when the switch is operated at a certain angle or more, even when the switch is released. The switch SWB is
A switch that raises or lowers the vehicle window only while the switch is pressed.

More specifically, for example, when the main SW 5 is pushed forward, the contact D of the switch SWB is first closed, and as a result, the vehicle window starts to descend, and when pushed further forward, the switch SWA is closed. Is done. At this time, the lowering operation of the vehicle window is continued even if the hand is released. Also,
When the main SW5 is pulled backward, first, the switch S
The contact U of WB is closed, and as a result, the vehicle window starts to rise, and when it is further pulled backward, the switch SWA is closed. At this time, similarly, the lifting operation of the vehicle window is continued even if the hand is released.

The switching circuit 15 shown in FIG. 1 includes a transistor Tr1 which is turned on in response to a high-level closing control signal output from the CPU 11, and a coil which is energized when the transistor Tr1 is turned on to make a contact. 1 for switching the power supply from the ground side to the power supply side, and a CPU
A transistor Tr2 that is turned on in response to a high-level open control signal output from
And a relay 2 that excites the coil when the switch is turned on to switch the contact from the ground side to the power supply side.

In the vehicle power window device 1 configured as described above, the switch SWB is operated by the vehicle occupant.
When the contact U is closed and the switch SWA is closed, the CPU 11 determines that the operation is to continue and raise the vehicle window, and outputs a high-level close control signal to the transistor Tr1. Next, the transistor Tr1
Turns on in response to the high-level closing control signal to excite the coil of the relay 1 and switch the contact from the ground side to the power supply side. As a result, the current from the battery 3 enters one end 7a of the motor 7 via the contact of the relay 1 and is grounded from the other end 7b of the motor 7 to the ground via the contact of the relay 2 so that the motor 7 Terminal 7a to terminal 7
The drive current flows toward b, the vehicle window switches from the fully opened state to the ascended state, and the windshield 27 rises from below to above.

Next, FIG. 2 is a view showing a configuration of an X-arm mechanism of the power window device 1 for a vehicle. The regulator 21 shown in FIG. 2 is incorporated in, for example, a door inner panel of the front door 19 (car window), and
The windshield 27 guided by the front guide rail 23 and the guide channel 25 is driven up and down in accordance with the rotation of. More specifically, the main arm 29 swings in response to the rotation of the motor 7, and the windshield 27 is moved up and down in parallel while being held by the parallel mechanism formed by the sub-channel 31 and the main channel 33.

Next, the operation of the vehicle power window device 1 will be described with reference to the flowchart shown in FIG. Here, it is assumed that the contact state of each switch shown in FIG. 1 is open. The control signals input to the transistors Tr1 and Tr2 are in a low state. Further, it is assumed that the vehicle window is open to some extent.

First, in step S10, the CPU 11
Determines whether the battery 3 has been removed. Specifically, the CPU 11 detects that the voltage of Vin has become lower than a predetermined value and thereafter has become higher than the predetermined value. If the battery 3 has been removed, the process proceeds to step S20.
On the other hand, if the state in which the battery 3 is connected is maintained, the process returns to step S10, and this process is repeated. At this time, the correspondence between the actual window opening / closing degree and the count value is undefined.

In step S20, the CPU 11 determines whether a switch input has been made to the main SW5. If there is a switch input, the process proceeds to step S30. On the other hand, if there is no switch input, the process returns to step S10, and this process is repeated.

Here, it is assumed that the occupant of the vehicle has sufficiently pulled the main SW 5 provided at the door rearward and released his hand. In this case, the contacts U of the switch SWB are closed, the switches SWA are closed, and then both switches are opened again. Step S
In step 30, the CPU 11 detects that the contact U of the switch SWB has changed from the Low state to the High state as the contact state of the main SW 5, and during this time, the contact of the switch SWA has changed to the Low state. The change to the High state is also detected. Where CP
U11 sets the open control flag to 1, and outputs a high-level open control signal to the base of the transistor Tr2.

The transistor Tr2 is turned on in response to a high-level open control signal output from the CPU 11, so that the collector and the emitter of the transistor Tr2 conduct, the coil of the relay 2 is excited, and the contact is switched from the ground side to the power supply side. Switch to. The current from the battery 3 enters one end 7b of the motor 7 via the contact of the relay 2 and is grounded from the other end 7a of the motor 7 to the ground via the contact of the relay 1. As a result, the terminal 7 is connected to the motor 7.
A drive current flows from b to the terminal 7a, the vehicle window switches from the stopped state to the lowered state, and the windshield 27 descends from above to below. That is, even if the main SW5 is operated by the passenger to raise the window,
When the attachment / detachment of the battery is detected, the operation is performed to lower the window.

On the other hand, even if the main switch 5 provided on the door is sufficiently pushed forward and released by the occupant of the vehicle, a drive current flows through the motor 7 from the terminal 7b to the terminal 7a. The vehicle window switches from the stopped state to the lowered state, and the windshield 27 descends from above to below.

When the vehicle window reaches the lower end, the sliding resistance increases and an overload occurs, so that the pulse width T of the pulse signal output from the encoder 9 increases. Here, in step S40, the CPU 11 determines whether or not the pulse width T of the pulse signal is larger than a predetermined reference value Tref. The predetermined value T based on the pulse width T of the pulse signal
If it is larger than ref, the process proceeds to step S50. On the other hand, a predetermined value Tref based on the pulse width T of the pulse signal is used as a reference.
In the following cases, the process returns to step S40, and this process is repeated.

Next, at step S50, the CPU 11
Assumes that the count value N corresponding to the lower end position of the vehicle window is 0, and the count value N corresponding to the upper end of the vehicle window is a predetermined count value NT set in advance. The predetermined count value NT is a value unique to the vehicle, and is set to, for example, 500. In step S60, the CPU 11 determines whether the vehicle window is moving up. Here, it is assumed that the main SW5 provided on the door is sufficiently pulled rearward and released by the occupant of the vehicle. In this case, the contacts U of the switch SWB are closed, the switches SWA are closed, and then both switches are opened again.

The CPU 11 detects that the contact U of the switch SWB has changed from the Low state to the High state as the contact state of the main SW 5, and during this time, the contact of the switch SWA changes to the Low state. Is changed to the High state. Here, the CPU 11 sets the close control flag to 1, and outputs a high-level close control signal to the base of the transistor Tr1.

The transistor Tr1 is turned on in response to a high-level closing control signal output from the CPU 11, so that the collector and the emitter of the transistor Tr1 conduct, the coil of the relay 1 is excited, and the contact is switched from the ground side to the power supply side. Switch to. The current from the battery 3 enters one end 7a of the motor 7 via the contact of the relay 1, and is grounded from the other end 7b of the motor 7 to the ground via the contact of the relay 2. As a result, the terminal 7 is connected to the motor 7.
A drive current flows from a to the terminal 7b, the vehicle window switches from the fully opened state to the ascended state, and the windshield 27 descends from below to above.

In step S70, the CPU 11 starts counting pulse signals output from the encoder 9. In step S80, the count value N of the pulse signal output from the encoder 9 is set to a predetermined count value NT.
It is determined whether it is greater than. Count value N of pulse signal
Is larger than the predetermined count value NT, step S9
Go to 0. On the other hand, if the count value N of the pulse signal is smaller than the predetermined count value NT, the process proceeds to step S100.

In step S90, since the count value N of the pulse signal is larger than the predetermined count value NT, it is determined that the vehicle window has reached the upper end. If a foreign object is caught between the window frame and the upper end of the window, the sliding resistance increases between the vehicle window and the foreign object, resulting in an overload state. As shown in FIG.
The pulse width T of the pulse signal output from the encoder 9 becomes relatively long. Here, in step S100,
It is determined whether or not the pulse width T of the pulse signal output from the encoder 9 is larger than a predetermined reference value Tref. If the pulse width T is greater than the reference value Tref, the process proceeds to step S110. On the other hand, the pulse width T
Is smaller than the reference value Tref as a reference, the process returns to step S80, and the process is repeated. In the gap of about 4 mm from the upper end of the vehicle window, the sliding resistance between the vehicle window and the vehicle window frame increases, causing an overload state. Therefore, the pulse width T of the pulse signal output from the encoder is relatively long. Become. Even if the pulse width T becomes larger than the predetermined value Tref, the gap returns to the step S80 without returning to the step S80.

In step S110, if the pulse width T is larger than a predetermined reference value Tref although the count value N of the pulse signal is smaller than a predetermined count value NT, a foreign object is caught in the vehicle window. Judge that there is. Therefore, in step S120, an inversion control operation is performed.

Next, the inversion control operation of the vehicle power window device 1 will be described with reference to the flowchart shown in FIG. In step S210, the CPU 11 sets the open control flag to 1 to lower the vehicle window, and outputs a high-level open control signal to the base of the transistor Tr2. Since the transistor Tr2 is turned on in response to the high-level open control signal output from the CPU 11, the collector and the emitter of the transistor Tr2 conduct, and the coil of the relay 2 is excited to switch the contact from the ground side to the power supply side. The current from the battery 3 enters one end 7b of the motor 7 via the contact of the relay 2 and is grounded from the other end 7a of the motor 7 to the ground via the contact of the relay 1. As a result, the terminal 7 is connected to the motor 7.
A drive current flows from b to the terminal 7a, the vehicle window is switched from the ascending state to the descending state, and the windshield 27 descends from above to below.

Next, at step S220, the CPU 11
Starts counting the pulse signals output from the encoder 9. Then, in step S230, it is determined whether or not the count value N of the pulse signal output from the encoder 9 is larger than a predetermined count value ND. If the count N of the pulse signal is larger than the predetermined count ND, the process proceeds to step S240. On the other hand, if the count value N of the pulse signal is smaller than the predetermined count value ND, step S23 is executed.
Return to 0 and repeat the process.

Next, at step S240, the CPU 11
Sets the open control flag to 0 to stop the lowering of the vehicle window.
To output a low-level stop control signal to the base of the transistor Tr2. The transistor Tr2 is
Since the transistor Tr2 is turned off in response to a low-level stop control signal output from the CPU 11, the collector of the transistor Tr2 is opened, the coil of the relay 2 is de-energized, and the contact is switched from the power supply side to the ground side. As a result, the drive current that has been supplied to the motor 7 disappears, and the vehicle window switches from the lowered state to the stopped state,
The pinched state is eliminated, and the vehicle window is maintained in an open state to some extent.

Therefore, when the passenger wants to close the vehicle window completely, the main switch 5 is pulled backward to some extent to close the contact U of the switch SWB, and this state is continued until the vehicle window rises. . In the CPU 11, as the contact state of the main SW5, the contact U of the switch SWB is set to L
An ow state is detected. Here, CPU1
1 determines that the manual function has been operated, sets the close control flag to 1, and outputs a high-level close control signal to the base of the transistor Tr1.

Since the transistor Tr1 is turned on in response to a high-level closing control signal output from the CPU 11, the collector and the emitter of the transistor Tr1 conduct, the coil of the relay 1 is excited, and the contact is switched from the ground side to the power supply side. Switch to. The current from the battery 3 enters one end 7a of the motor 7 via the contact of the relay 1, and is grounded from the other end 7b of the motor 7 to the ground via the contact of the relay 2. As a result, the terminal 7 is connected to the motor 7.
A drive current flows from a to the terminal 7b, the vehicle window is switched from the stopped state to the raised state, and the windshield 27 rises from below to above, and becomes fully closed.

As described above, when the battery 3 is detached and the count value once becomes an indefinite value, when the main switch 5 is operated, the vehicle window is lowered to the lower end, and the count value N corresponding to the lower end position of the vehicle window is set to 0. Assuming that the count value N corresponding to the upper end of the vehicle window is a predetermined count value NT, the pulse width T of the pulse signal is larger than the predetermined value Tref until the count value N reaches the predetermined count value NT. When it becomes
By controlling the motor 7 to reversely drive, even if foreign matter is caught in the vehicle window when the vehicle window is raised, the vehicle window can be switched from the upward drive to the downward drive.

[Brief description of the drawings]

FIG. 1 is a diagram showing a system configuration of a vehicle power window device 1 according to an embodiment of the present invention.

FIG. 2 is a diagram showing a configuration of an X-arm mechanism of the power window device 1 for a vehicle.

FIG. 3 is a flowchart for explaining the operation of the vehicle power window device 1.

FIG. 4 is a flowchart for explaining a reversal control operation of the vehicle power window device 1.

FIG. 5 is a time chart of a pulse signal from an encoder 9;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Power window device for vehicles 3 Battery 5 Main switch 7 Motor 9 Encoder 11 CPU 15 Switching circuit

Claims (1)

[Claims] 1. A motor provided in a vehicle for opening and closing an opening / closing body, and an encoder for converting a rotation angle of the motor into a pulse signal, and detecting an opening / closing degree of the opening / closing body as a count value of the pulse signal. In a power window device for a vehicle, when a battery for supplying power to the motor is detached, a count value when the opening and closing body is fully opened is set to zero, and a total value when the opening and closing body is fully closed is set. Initialization means for assuming a numerical value as a predetermined count value; and controlling the motor to reverse drive or stop when the pulse width of the pulse signal becomes larger than a predetermined value before reaching the predetermined count value. A power window device for a vehicle, comprising: