JP3546641B2 - Power window device for vehicles - Google Patents

Description

[0001]
TECHNICAL 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 vehicle window from an ascending drive to a descending drive when a foreign object is caught in the vehicle window.
[0002]
[Prior art]
Conventionally, as a power window device for a vehicle, when a vehicle window is driven up and down using a motor, the rotation angle of the motor is converted into a pulse signal using an encoder, and the opening / closing degree of the vehicle window is detected as a count value of the pulse signal. Is known.
[0003]
Conventionally, a power window device for a vehicle has detected a load applied to a motor based on a pulse width of a pulse signal output from an encoder when the motor is being driven upward to close a vehicle window. For this reason, when a foreign object is caught between the vehicle window frame and the upper end of the vehicle window and an overload state occurs, the vehicle is controlled so that the up drive of the vehicle window is switched to the down drive and the reverse drive is performed. Has the advantage that it can be taken out immediately even if it is caught in the car window.
[0004]
Further, conventionally, in a power window device for a vehicle, a limit SW for detecting an upper end position of a vehicle window is provided inside a door, and when a contact of the limit SW is closed according to the rise of the vehicle window, a motor is connected to the motor. Since the applied load increases, the above-described reversal drive is not performed, and the vehicle is controlled as a reversal prohibition region in order to completely close the vehicle window.
[0005]
[Problems to be solved by the invention]
However, conventionally, in a power window device for a vehicle, when the contact point of the limit SW remains in a fixed state for some reason irrespective of the open / close state of the vehicle window, the upper end of the vehicle window is in the reversal prohibition region. If, for example, a foreign object is caught between the vehicle window frame and the upper end of the vehicle window when the motor is driven upward to close the vehicle window by automatically closing the vehicle window switch, the vehicle window Could not be controlled so that the ascending drive was reversed. For this reason, it is necessary to perform a switch operation so as to drive the vehicle window downward, so that there is a problem that an unnecessary operation is forced on the occupant.
[0006]
The present invention has been made in view of the above, and an object of the present invention is to provide a vehicle power window device that can contribute to improvement in reliability.
[0007]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, the invention according to claim 1 is provided with position detecting means for detecting a predetermined position below the upper end of the vehicle window, and lowers the vehicle window from the ascending drive when a foreign object is caught below the predetermined position. An encoder for converting the rotation angle of a motor that drives the vehicle window into a pulse signal in a vehicle power window device that controls a reversible region that can be controlled to be switched to drive or stop while controlling a region above the predetermined position as a reversal prohibition region. And counting the pulse signal from the encoder at the time when the detection signal from the position detecting means is received when the vehicle window is raised, and while the pulse width of the pulse signal does not exceed a predetermined value, the pulse signal When the counted value exceeds a predetermined value, the inversion-inhibited area is switched to an invertible area and controlled, and then the pulse width of the pulse signal is changed. When exceeding the value shall be summarized in that a control means for lowering driving the car window.
[0008]
【The invention's effect】
According to the first aspect of the present invention, counting of the pulse signal from the encoder is started when the detection signal from the position detection unit is received when the vehicle window is raised, and the pulse width of the pulse signal does not exceed a predetermined value. In the meantime, when the count value of the pulse signal exceeds a predetermined value, control is performed by switching the reversal prohibition area to the reversible area, and then, when the pulse width of the pulse signal exceeds the predetermined value, the vehicle window is driven downward. Therefore, even if there is an abnormality in the detection signal from the position detecting means, the vehicle window can be switched from the ascending drive to the descending drive when a foreign object is caught in the vehicle window , thereby improving the reliability of the vehicle power window device. Can contribute.
[0009]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0010]
FIG. 1 is a diagram showing a system configuration of a vehicle power window device 1 according to one embodiment of the present invention.
[0011]
As shown in FIG. 1, a vehicle power window device 1 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 for driving the vehicle window up and down. 7, an encoder 9 for converting the rotation angle of the motor 7 into a pulse signal, a limit SW11 for detecting the upper end position of the vehicle window, an operation signal from the main SW5, a pulse signal from the encoder 9, and a signal from the limit SW11. And a switching circuit 15 for switching the direction of current supplied to the motor 9 in response to the vehicle window opening / closing control signal from the CPU 13.
[0012]
Specifically, the main SW 5 shown in FIG. 1 includes a switch SWA and a switch SWB having an integral structure. The switch SWA is provided with 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 if the hand is released from the switch. The switch SWB is a switch that raises or lowers the vehicle window only while pressing the switch.
[0013]
More specifically, for example, when the main SW5 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. . At this time, even if the hand is released, the lowering operation of the vehicle window is continued. When the main switch 5 is pulled backward, the contact point U of the switch SWB is closed first. As a result, the vehicle window starts to rise, and when the switch 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.
[0014]
The switching circuit 15 shown in FIG. 1 includes a transistor Tr1 that is turned on in response to a high-level closing control signal output from the CPU 13, and a coil that is excited when the transistor Tr1 is turned on to set the contact to the ground side. From the ground to the power supply side, the transistor Tr2 which is turned on in response to the high-level open control signal output from the CPU 13, and the coil is excited when the transistor Tr2 is turned on to switch the contact from the ground side to the power supply side. And a relay 2.
[0015]
In the vehicle power window device 1 configured as described above, when the occupant of the vehicle closes the contact U of the switch SWB and further closes the switch SWA, the CPU 13 continues the vehicle window. It is determined that the operation is to increase, and a high-level close control signal is output to the transistor Tr1. Next, the transistor Tr1 is turned on in response to the high-level closing control signal to excite the coil of the relay 1, and switches 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 via the contact of the relay 2 to the ground. A drive current flows from the terminal 7a to the terminal 7b, the vehicle window switches from the fully opened state to the raised state, and the windshield 27 rises from below to above.
[0016]
Next, FIG. 2 is a diagram illustrating a configuration of an X-arm mechanism of the power window device 1 for a vehicle.
[0017]
The regulator 21 shown in FIG. 2 is incorporated in, for example, a door inner panel of a front door 19 (car window), and moves up and down a windshield 27 guided by a front guide rail 23 and a guide channel 25 in accordance with rotation of the motor 7. Drive. More specifically, the main arm 29 swings in response to the rotation of the motor 7, and the windshield 27 is raised and lowered in parallel while being held by the parallel mechanism formed by the sub-channel 31 and the main channel 33.
[0018]
Further, a limit switch 11 is incorporated in the upper portion of the door inner panel of the front door 19, and when the windshield 27 rises upward from below, the upper end of the sub-channel 31 pushes up the arm portion of the limit switch 11. . As a result, the contact of the limit switch 11 is closed.
[0019]
Note that the limit SW11 is arranged at a position where the upper end of the sub-channel 31 can be raised by about 4 mm as a reversal prohibition region described later even after the contact of the limit SW11 is closed. Any configuration may be used as long as the position can be detected. For example, an encoder or a device that detects the position using light may be used.
[0020]
Next, the operation of the vehicle power window device 1 will be described with reference to the flowchart shown in FIG.
[0021]
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 in a fully opened state.
[0022]
Now, 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.
[0023]
The CPU 13 detects, as the contact state of the main SW5, that the contact U of the switch SWB has changed from the low state to the high state, and during this time, the contact of the switch SWA has changed from the low state to the high state. Is also detected. Here, the CPU 13 determines that the one-touch function for moving up the vehicle window and moving up is operated, sets the close control flag to 1, and outputs a high-level close control signal to the base of the transistor Tr1.
[0024]
The transistor Tr1 is turned on in response to a high-level closing control signal output from the CPU 13, 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. 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, a drive current flows through the motor 7 from the terminal 7a to the terminal 7b, the vehicle window is switched from the fully opened state to the elevated state, and the windshield 27 rises from below to above.
[0025]
First, in step S10, the CPU 13 determines whether the vehicle window is moving up. Specifically, when the close control flag is set to 1 and a pulse signal is output from the encoder 9, the vehicle window is being raised. If the car window is moving up, the process proceeds to step S20. On the other hand, when the vehicle window is descending or stopped, the process returns to step S10, and this process is repeated.
[0026]
Here, since the windshield 27 is in the process of ascending upward from below, in step S20, the CPU 13 determines whether or not the limit SW 11 incorporated in the upper part of the door inner panel of the front door 19 has been switched on. Judge. When the limit SW11 has been switched to the ON state, the process proceeds to step S30. On the other hand, if the limit SW11 has not been switched to the ON state, the process returns to step S10, and the process is repeated.
[0027]
Next, in step S30, the CPU 13 starts counting the pulse signals output from the encoder 9.
[0028]
As described above, even after the contacts of the limit SW 11 are closed, there is an interval of about 4 mm until the vehicle window reaches the upper end. During this time, the sliding resistance between the vehicle window and the vehicle window frame increases, resulting in an overload state, so that the pulse width T of the pulse signal output from the encoder 9 becomes relatively long. Here, in step S40, 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 S50. On the other hand, if the pulse width T is smaller than the predetermined reference value Tref, the process proceeds to step S60.
[0029]
In step S50, since the pulse width T is greater than the reference value Tref, it is determined that the vehicle window has reached a position about 4 mm before the upper end. In this case, a pulse signal is output from the encoder 9 for about 20 to 40 pulses, and the pulse width T gradually increases. Finally, the vehicle window stops at the upper end and is fully closed.
[0030]
On the other hand, in step S60, if the pulse width T output from the encoder 9 is smaller than the reference value Tref, the count value of the pulse signal output from the encoder 9 becomes the reference count value. It is determined whether it is larger than Nref. As described above, when the vehicle window has reached a position about 4 mm in front of the upper end, the encoder 9 outputs pulse signals for about 20 to 40 pulses. Nref
Nref = 20
Set.
[0031]
Here, if the count value of the pulse signal is larger than the reference count value Nref, the process proceeds to step S80. On the other hand, if the count value of the pulse signal is smaller than the reference count value Nref which is a reference, the process proceeds to step S70.
[0032]
Next, in step S70, since the count value of the pulse signal is smaller than the predetermined count value Nref as a reference, it is determined that the contact point of the limit SW11 is in a normal state and the vehicle window is approaching the upper end position. Therefore, 1 is set to the reversal prohibition flag, and the subsequent ascending range of the vehicle window is treated as the reversal prohibition area, and then the process returns to step S40.
[0033]
On the other hand, in step S80, since the count value of the pulse signal is larger than the predetermined count value Nref, which is the reference, the pulse width T output from the encoder 9 despite the contact point of the limit SW 11 is in the ON state. If it is smaller than the reference value Tref, it is determined that the contact point of the limit SW11 is stuck for some reason or that the signal line from the limit SW11 is short-circuited.
[0034]
Therefore, in step S90, the reversible flag is set to 1, and thereafter, the reversal prohibition area of the vehicle window is treated as a reversible area, and then the flow proceeds to step S100 as a reversal control operation.
[0035]
Next, the reversal control operation of the vehicle power window device 1 will be described with reference to the flowchart shown in FIG.
[0036]
First, in step S210, 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 larger than the reference value Tref, the process proceeds to step S220. On the other hand, if the pulse width T is smaller than the predetermined reference value Tref, the process returns to step S210 and the process is repeated.
[0037]
If the pulse width T is larger than a predetermined reference value Tref, there is a possibility that a foreign object is interposed between the upper part of the vehicle window and the vehicle window frame, the sliding resistance increases, and an overload state occurs. Therefore, in step S220, the CPU 13 sets the open control flag to 1 in order to lower the vehicle window, and outputs a high-level open control signal to the base of the transistor Tr2.
[0038]
Since the transistor Tr2 is turned on in response to the high-level open control signal output from the CPU 13, 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, a drive current flows from the terminal 7b to the terminal 7a in the motor 7, the vehicle window is switched from the up state to the down state, and the windshield 27 descends from above to below.
[0039]
Next, in step S230, the internal timer of the CPU 13 is set to 0 and started. Next, in step S240, it is determined whether, for example, 500 msec has elapsed. When 500 msec has elapsed, the process proceeds to step S250. On the other hand, if 500 msec has not elapsed, the process returns to step S240 and the process is repeated.
[0040]
Next, in step S250, the CPU 13 sets the open control flag to 0 to stop the lowering of the vehicle window, and outputs a low-level stop control signal to the base of the transistor Tr2.
[0041]
Since the transistor Tr2 is turned off in response to the low-level stop control signal output from the CPU 13, the collector of the transistor Tr2 is opened, the coil of the relay 2 is released from the excitation state, and the contact is switched from the power supply side to the ground side. Switch. As a result, the drive current that has been supplied to the motor 7 is lost, the vehicle window is switched from the lowered state to the stopped state, the pinched state is eliminated, and the vehicle window is maintained in a somewhat open state.
[0042]
Therefore, when it is desired to completely close the vehicle window according to the passenger's request, 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.
[0043]
The CPU 13 detects that the contact U of the switch SWB is in the low state as the contact state of the main SW5. Here, the CPU 13 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.
[0044]
The transistor Tr1 is turned on in response to a high-level closing control signal output from the CPU 13, 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. 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, a drive current flows from the terminal 7a to the terminal 7b in the motor 7, the vehicle window switches from the stopped state to the raised state, the windshield 27 rises from below to above, and becomes fully closed.
[0045]
As described above, when the detection signal is received from the limit switch 11 when the vehicle window is raised, and when the count value of the pulse signal from the encoder 9 exceeds a predetermined value, the CPU 13 sets the vehicle window inversion-restrictable region to the reversible region. , The vehicle window can be switched from the ascending drive to the descending drive when a foreign object is caught in the vehicle window, even if the detection signal from the limit SW 11 has a failure or abnormality. Can be improved.
[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 view 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 an inversion control operation of the vehicle power window device 1.
[Explanation of symbols]
3 Battery 5 Main SW
7 Motor 9 Encoder 11 Limit SW
13 CPU
15 Switching circuit

Claims (1)

Providing position detecting means for detecting a predetermined position below the upper end of the vehicle window, while setting the vehicle window below the predetermined position as a reversible area that can be controlled to switch from ascending drive to descending drive or stop when foreign matter is pinched, A power window device for a vehicle that controls an area above the predetermined position as an inversion inhibition area,
An encoder that converts a rotation angle of a motor that drives the vehicle window into a pulse signal,
At the time of raising the vehicle window, counting of the pulse signal from the encoder is started at the time when the detection signal from the position detecting means is received, and the pulse signal is counted while the pulse width of the pulse signal does not exceed a predetermined value. When the numerical value exceeds a predetermined value, control is performed by switching the reversal prohibition region to a reversible region, and thereafter, when the pulse width of the pulse signal exceeds a predetermined value, a control unit that drives the vehicle window downward is provided. A power window device characterized by the above-mentioned.

Images