JP2004098913A - Automatic opening/closing device for vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve the safety of an automatic opening/closing device for a vehicle. <P>SOLUTION: A power sliding door device has an electric motor 25 for driving the opening/closing of a sliding door closeably mounted on the vehicle. The electric motor 25 is connected to a driving circuit 61 having four FETs 71, 72, 77, 78 with rectifying functions and the driving circuit 61 has a loop circuit 83 formed by an open-side connection circuit 68 on a low potential side and a close-side connection circuit 76 on a low potential side. When an automatic opening operation prohibit mode is set, the FET 78 is only turned ON and other FETs 71, 72, 77 are turned OFF. Thus, an induction current to be generated by the electric motor 25 when the sliding door is moved to be opened with the input flows in the loop circuit and the induction current generated when the sliding door is moved to be closed does not flow therein. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an automatic opening / closing device for a vehicle, and is particularly effective when applied to a drive circuit of an electric motor that drives an opening / closing member.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, vehicles such as automobiles are provided with open / close members, such as doors, slide doors, and hatch gates, which are attached to the vehicle so as to be freely opened and closed. In particular, many wagons and one-box vehicles have sliding doors that open and close in the vehicle front-rear direction on the side of the vehicle, making it easy to get on and off from the side of the vehicle and load and unload luggage. Can be
[0003]
Since a sliding door requires a small open space at the time of opening and closing, it is often applied to a relatively large opening, and the sliding door itself tends to be large. Therefore, the weight becomes heavy, and it has been sometimes difficult for women and children to freely open and close them. Particularly on a slope or the like, there is a problem that the sliding door cannot be easily opened or closes suddenly due to its own weight. Therefore, under the situation where family use such as one-box vehicles is increasing, vehicles equipped with automatic opening and closing devices for sliding doors have appeared, so that women and children can easily open and close, and the tendency for convenience to increase It is in.
[0004]
As such an automatic opening / closing device, there is known an automatic opening / closing device in which an electric motor connected to a slide door via a drum, a cable, or the like is provided, and the slide door is driven by the electric motor. In this case, the operation of the electric motor is controlled by the control device in accordance with a command signal from an open / close switch provided in the vehicle interior or the like.
[0005]
The control device is provided with a drive circuit for performing current control on the electric motor. As this drive circuit, for example, a so-called full bridge circuit (H bridge circuit) as disclosed in Japanese Patent Application Laid-Open No. Hei 10-246061. Is used. The full bridge circuit includes two open circuits provided between a power supply terminal to which a power supply voltage is supplied and one power supply terminal of the electric motor and between the other power supply terminal of the electric motor and a ground terminal serving as a reference potential. Side FET (field effect transistor) and two closed-side FETs provided between the power supply terminal and the other power supply terminal of the electric motor and between the ground terminal and one power supply terminal of the electric motor. These FETs are switched from a cutoff state, that is, OFF, to a connected state, that is, ON, when a gate voltage is supplied from a control device. Then, by simultaneously turning on the two open-side FETs of the four FETs, the electric motor is operated in the opening direction to move the slide door in the opening direction, and the two closed-side FETs are simultaneously turned on. Thus, the electric motor can be operated in the closing direction to move the sliding door in the closing direction.
[0006]
In such an automatic opening and closing device, when the slide door is stopped at an intermediate position between the fully open position and the fully closed position, even if the vehicle is inclined, the slide door is prevented from moving by its own weight. Then, a regenerative braking force by an electric motor is applied to the sliding door. In other words, only the two FETs connected to the ground terminal side of the electric motor are turned on at the same time to short-circuit the power supply terminals, and when the sliding door moves, an induced current flows between the power supply terminals to generate regenerative braking force on the electric motor. Is caused to occur.
[0007]
[Problems to be solved by the invention]
In such an automatic opening / closing device, when the vehicle speed is detected or when the select lever of the automatic transmission is set to a position other than the parking position, that is, when the vehicle is traveling or may start traveling, the sliding operation is performed. The door is prohibited from being automatically operated in the opening direction by the electric motor to ensure the safety of the occupant. If the slide door is already open at this time, all the FETs of the drive circuit are turned off to release the regenerative braking force generated by the electric motor so that the slide door can be easily closed manually. Like that.
[0008]
However, when the regenerative braking by the electric motor is released, the sliding door can easily move not only in the closing direction but also in the opening direction. Could be moved in the opening direction.
[0009]
An object of the present invention is to improve safety of an automatic opening / closing device for a vehicle.
[0010]
[Means for Solving the Problems]
An automatic opening and closing device for a vehicle according to the present invention is an automatic opening and closing device for a vehicle that automatically opens and closes an opening and closing member attached to a vehicle so as to be openable and closable. And a short circuit connected to one power supply terminal and the other power supply terminal provided on the electric motor, and when the vehicle is running or may start running, An open direction operation inhibiting means for inhibiting operation of the electric motor in the opening direction; and the electric motor when the operation of the electric motor in the opening direction is inhibited by the open direction operation inhibiting means. Rectifying means for flowing an induction current generated when the motor rotates in the opening direction and for interrupting the induction current generated when the electric motor rotates in the closing direction, wherein the vehicle is running or starts running. That when the possibility is, the regenerative braking force is applied to the opening direction to the opening and closing member, characterized in that it not apply a regenerative braking force in the closing direction.
[0011]
In the automatic opening and closing device for a vehicle according to the present invention, when the vehicle speed of the vehicle is detected, or when a select lever provided on the vehicle is set to a position other than a parking position, the opening direction operation prohibiting unit is configured to control the opening of the electric motor. The operation in the opening direction is prohibited.
[0012]
The automatic opening and closing device for a vehicle according to the present invention includes a high-potential-side open-side connection circuit that connects the one power supply terminal and a high-potential-side power supply terminal, and the other power supply terminal and a low-potential-side power supply terminal. An open side provided in a low potential side open side connection circuit to be connected and having two open side switching elements having a rectifying function of flowing only a current flowing from the low potential side power supply terminal to the high potential side power supply terminal. A drive circuit, a high-potential-side closed-side connection circuit for connecting the other power supply terminal to the high-potential-side power supply terminal, and a low-potential for connecting the one power supply terminal to the low-potential-side power supply terminal. And a closed-side drive circuit having two closed-side switching elements provided in the open-side connection circuit on the high-potential side and the open-side connection circuit on the high-potential side. Side connection circuit or the low power When the short circuit is formed by the open side connection circuit on the side and the low side connection circuit on the low potential side, and when the operation in the opening direction of the electric motor is prohibited by the opening direction operation prohibiting means, the four It is characterized in that only one of the switching elements on the closed side is switched to a connected state.
[0013]
The automatic opening / closing device for a vehicle according to the present invention is characterized in that the opening / closing member is mounted movably in a vehicle front-rear direction along a side surface of the vehicle.
[0014]
According to the present invention, when the vehicle is running or may start running, the opening / closing member applies regenerative braking force in the opening direction and does not apply regenerative braking force in the closing direction. , And can be easily moved manually in the closing direction, thereby improving the safety of the automatic opening / closing device for a vehicle.
[0015]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
[0016]
FIG. 1 is a plan view schematically showing a vehicle equipped with a power sliding door device according to an embodiment of the present invention, and FIG. 2 is an enlarged view showing details of the power sliding door device shown in FIG. FIG. 3 is an explanatory diagram showing a control system of the power sliding door device shown in FIG.
[0017]
As shown in FIG. 1, a power sliding door device 12 as an automatic vehicle opening / closing device is provided on a side portion of a vehicle 11, and the power sliding door device 12 is an opening / closing member mounted on the vehicle 11 so as to be openable and closable. As a sliding door 13.
[0018]
As shown in FIG. 2, an arm 14 projecting rearward of the vehicle 11 is fixed to the slide door 13, and a roller assembly 15 is swingably attached to the tip of the arm 14. The roller assembly 15 is incorporated in a slide rail 16 fixed to a side portion of the vehicle 11, and is movable along the slide rail 16 in the front-rear direction of the vehicle 11. A stopper rubber 17 is provided on the rear end of the slide rail 16 in the vehicle, and the roller assembly 15 comes into contact with the stopper rubber 17 to restrict the movement thereof. With such a structure, the slide door 13 is movable in the vehicle front-rear direction along the side surface of the vehicle 11 between the fully open position indicated by the solid line and the fully closed position indicated by the alternate long and short dash line, that is, can be opened and closed. Further, a curved portion 16a is formed at the vehicle front end of the slide rail 16, and the roller door assembly 15 is guided by the curved portion 16a so that the slide door 13 fits in the same plane as the side surface of the vehicle 11. It is drawn inside and closed. Then, when getting on and off the second seat 18 and the third seat 19 provided in the passenger compartment, and when loading luggage, the slide door 13 is opened to the fully opened position and used.
[0019]
The roller assembly 15 is provided with a cable 23 which is wound over reversing pulleys 21 and 22 provided at both ends of the slide rail 16 and guided toward the front side and the rear side of the vehicle 11. The opening and closing operation of the slide door 13 is performed by pulling any one side. The power sliding door device 12 is provided with a slide actuator 24 for driving the cable 23. The slide actuator 24 is fixed to the vehicle 11 near the center of the slide rail 16, and the cable 23 is guided into the slide actuator 24 from the front and rear sides of the vehicle via the reversing pulleys 21 and 22. Has become.
[0020]
As shown in FIG. 3, the slide actuator 24 is provided with an electric motor 25. The electric motor 25 is provided with a pair of power supply terminals 26 and 27. When a direct current is supplied to the power supply terminals 26 and 27, the electric motor 25 operates, that is, its rotating shaft 25a rotates. ing. The rotation direction can be switched between forward rotation and reverse rotation according to the direction of the DC current supplied to the power supply terminals 26 and 27. A multipolar magnetized magnet 28 magnetized to 10 poles is fixed to the rotating shaft 25a, and two Hall ICs 29 are provided near the rotation orbit of the multipolar magnetized magnet 28 with a phase difference of 90 degrees from each other. Has been. These Hall ICs 29 can output a pulse signal every time the multipolar magnetized magnet 28 rotates and the magnetic field changes, and when the rotating shaft 25a makes one rotation, the phase is shifted by 90 degrees from the Hall IC 29 for 10 periods. A minute pulse signal is output. The Hall IC is a sensor that converts a change in a magnetic field into a voltage.
[0021]
The output of the electric motor 25 is transmitted to an output shaft 35 via a drive gear 31, a large diameter spur gear 32, a small diameter spur gear 33, and a driven gear. That is, the driving gear 31 is fixed to the rotating shaft 25a, and the driving gear 31 is meshed with the large diameter spur gear 32, and the small diameter spur gear 33 formed so as to rotate coaxially and integrally with the large diameter spur gear 32 is The driven gear 34 fixed to the output shaft 35 is engaged. Thus, the rotation of the rotating shaft 25a is transmitted to the output shaft 35 at a reduced speed.
[0022]
The slide actuator 24 is provided with a drum 36 rotatably. The drum 36 is fixed to an output shaft 35 and rotates integrally with the output shaft 35. A spiral guide groove (not shown) is formed on the outer peripheral surface of the drum 36, and the cable 23 guided by the slide actuator 24 is wound around the drum 36 multiple times along the guide groove. Therefore, the slide door 13 is connected to the rotating shaft 25a of the electric motor 25 via the cable 23, the drum 36, the output shaft 35, and the gears 31 to 34. When the electric motor 25 is rotated in the forward direction, that is, in the opening direction, and the drum 36 is rotated in the clockwise opening direction in FIG. 3, the cable 23 on the vehicle rear side is wound around the drum 36, and the slide door 13 is It moves toward the fully open position while being pulled by the cable 23. Conversely, when the electric motor 25 is rotated in the reverse direction, that is, in the closing direction to rotate the drum 36 in the closing direction, which is counterclockwise in FIG. 3, the cable 23 on the vehicle front side is wound around the drum 36 and the slide door 13 is rotated. Moves toward the fully closed position while being pulled by the cable 23. Thus, the electric motor 25 drives the slide door 13 in the opening direction and the closing direction. Further, since the slide door 13 is connected to the rotation shaft 25a of the electric motor 25, when the slide door 13 is moved in the opening direction, the rotation shaft 25a rotates forward in conjunction with the movement, and the slide door 13 is closed. When it moves in the direction, the rotating shaft 25a is reversed in conjunction with the movement.
[0023]
A multipole magnet 37 magnetized to 10 poles is mounted on the side surface of the drum 36, and a Hall IC 38 is provided near the rotation orbit of the multipole magnet 37. The Hall IC 38 can output a pulse signal every time the multipole magnetized magnet 37 rotates and the magnetic field changes. When the drum 36 makes one rotation, a pulse signal for ten cycles is output from the Hall IC 38. It has become. Further, tensioners 41 and 42 are provided between the drum 36 and the two reversing pulleys 21 and 22, respectively, so that the slack of the cable 23 can be removed and the tension can always be maintained within a certain range.
[0024]
The vehicle 11 is provided with an automatic transmission (not shown) for shifting the output of a prime mover such as an engine (not shown) and transmitting the output to drive wheels (not shown), and a shift operation section 43 of the automatic transmission is provided in the vehicle interior. Has been. As is well known, the shift operation unit 43 has a select lever 44, and the driver operates the select lever 44 to select a travel range D, a reverse range R, a neutral range N, a parking range P, and the like. You can do it. Further, a range detection sensor 45 is provided in the shift operation section 43, and the range detection sensor 45 can detect which range is selected by the select lever 44.
[0025]
The slide actuator 24 is provided with a control unit 51 (hereinafter, referred to as ECU 51) for controlling the current supplied to the electric motor 25 to control the opening and closing operation of the slide door 13. As shown in FIG. 3, the ECU 51 includes a microprocessor 52 (hereinafter referred to as a CPU 52) for calculating a control signal, a ROM 53 for storing a control program, an arithmetic expression, map data, and the like, and temporarily stores data. RAM 54 and I / O port 55.
[0026]
The ECU 51 includes, at the I / O port 55, Hall ICs 29 and 38, a slide door open / close switch (not shown) (not shown), a range detection sensor 45, and a vehicle speed sensor 56 (for example, an output (not shown) of an automatic transmission (not shown)). The rotational speed of the shaft is detected, and the vehicle speed of the vehicle is calculated from the rotational speed.). Then, the ECU 51 can detect the rotation speed of the electric motor 25, that is, the moving speed of the slide door 13, based on the cycle of the pulse signal input from the Hall IC 29, and based on the appearance timing of these pulse signals, The rotation direction of the slide door 25, that is, the movement direction of the slide door 13 can be detected. The ECU 51 analyzes the rotation angle of the drum 36 based on a pulse signal input from the Hall IC 38, and can detect the position of the slide door 13 based on the rotation angle. This is because the multi-pole magnetized magnet 37 is magnetized so that the Hall IC 38 generates a reference pulse signal for causing the ECU 51 to recognize the reference position of the slide door 13, and the slide door 13 based on the reference pulse signal is generated. This is performed by increasing or decreasing the pulse signal from the reference position. The reference position may be the fully open position or the fully closed position of the slide door 13, or a plurality of reference positions may be provided. The position of the slide door 13 may be detected using a resolver, a rotary encoder, or the like, instead of the Hall IC 38. Further, the ECU 51 can detect the position of the select lever 44 based on an input signal from the range detection sensor 45, and can detect the vehicle speed of the vehicle 11 based on an input signal from the vehicle speed sensor 56. I have.
[0027]
The ECU 51 is provided with a drive circuit 61 for driving the electric motor 25, and controls the electric motor 25 via the drive circuit 61.
[0028]
FIG. 4 is a circuit diagram showing details of the drive circuit shown in FIG. The drive circuit 61 includes a positive power supply voltage terminal 63 serving as a high potential power supply terminal connected to a high potential side of a battery 62 mounted on the vehicle 11 and a ground terminal 64 serving as a low potential power supply terminal serving as a reference potential. , And an open drive circuit 65 for rotating the electric motor 25 in the normal direction and a close drive circuit 66 for rotating the electric motor 25 in the reverse direction.
[0029]
The open-side drive circuit 65 connects the high-potential-side open-side connection circuit 67 that connects one power supply terminal 26 of the electric motor 25 to the positive power supply voltage terminal 63 and the other power supply terminal 27 of the electric motor 25 and the ground terminal 64. A low-potential-side open-side connection circuit 68 is connected to these open-side connection circuits 67, 68. Power MOS-FETs 71, 72 (hereinafter, FETs 71, 72) as open-side switching elements are provided in these open-side connection circuits 67, 68, respectively. ) Is provided. These FETs 71 and 72 have gates 71a and 72a, respectively, and these gates 71a and 72a are connected to the CPU 52. When the gate voltage is supplied from the CPU 52 to the gates 71a and 72a, the FETs 71 and 72 are switched from the cutoff state, ie, OFF, to the connection state, ie, ON. Further, these FETs 71 and 72 as rectifiers have a rectifying function (in FIG. 3, they are described as diodes 73 and 74 for the sake of convenience). Only the current flowing toward the power supply voltage terminal 63, that is, only the current flowing from the power supply terminal 26 to the positive power supply voltage terminal 63 in the FET 71, and only the current flowing from the ground terminal 64 to the power supply terminal 27 in the FET 72 can be flowed. I have. The open-side drive circuit 65 connects the positive power supply voltage terminal 63 to the power supply terminal 26 and the power supply terminal 27 and the ground terminal 64 by turning on the FETs 71 and 72 simultaneously. The electric motor 25 is supplied with a DC current directed to the electric motor 27 so that the electric motor 25 can rotate forward. In the present embodiment, the power MOSFETs 71 and 72 having a rectifying function are used as the open-side switching elements. However, the present invention is not limited to this. What is necessary is just to have a similar function, such as forming a closed side switching element with the connected diode.
[0030]
On the other hand, the closing-side drive circuit 66 includes a high-potential-side closing-side connection circuit 75 that connects the other power supply terminal 27 of the electric motor 25 and the positive power supply voltage terminal 63, and one power supply terminal 26 and the ground terminal 64 of the electric motor 25. And a low-potential-side closed-side connection circuit 76 for connecting the power MOS-FETs 77 and 78 (hereinafter referred to as FETs 77 and 78) as closed-side switching elements, respectively. Is provided). These FETs 77 and 78 have gates 77a and 78a, respectively, and these gates 77a and 78a are connected to the CPU 52. When the gate voltage is supplied from the CPU 52 to the gates 77a and 78a, the FETs 77 and 78 are switched from the cutoff state, ie, OFF, to the connection state, ie, ON. In addition, these FETs 77 and 78 have a rectifying function (in FIG. 3, they are described as diodes 81 and 82 for the sake of convenience), and even when a gate voltage is not supplied, the ground terminal 64 connects to the positive power supply voltage terminal 63. , That is, only the current flowing from the power supply terminal 27 to the positive power supply voltage terminal 63 in the FET 77, and only the current flowing from the ground terminal 64 to the power supply terminal 26 in the FET 78. In addition, as the FETs 77 and 78 provided in the close-side drive circuit 66, those having no rectification function may be used. When the FETs 77 and 78 are turned on at the same time, the closing drive circuit 66 connects the positive power supply voltage terminal 63 to the power supply terminal 27 and the power supply terminal 26 to the ground terminal 64. The electric motor 25 can be supplied with a direct current flowing to the electric motor 25 to reverse the electric motor 25. In the present embodiment, the closing-side switching element is not limited to the power MOS FETs 77 and 78, but may be any other switching element that can switch the connection circuits 75 and 76 between the cutoff state and the connection state. Switching member or switching element.
[0031]
The CPU 52 supplies a gate voltage in a predetermined pattern to each of the FETs 71, 72, 77, 78 based on the result of calculating each input signal input from the I / O port 55 according to a control program stored in the ROM 53. Thus, drive control of the electric motor 25 is performed.
[0032]
FIG. 5A is a circuit diagram showing an operation state of the drive circuit when the slide door is automatically opened, and FIG. 5B is a circuit diagram showing an operation state of the drive circuit when the slide door is automatically closed. FIG. FIG. 6 is a circuit diagram showing an operation state of the drive circuit in the automatic opening operation inhibition mode.
[0033]
Next, the operation of the power sliding door device 12 having such a structure will be described.
[0034]
When the open / close switch is operated by the driver when the slide door 13 is fully closed, and a command signal for operating the slide door 13 in the opening direction is input to the ECU 51, the ECU 51 automatically opens the slide door 13. Will be. This automatic opening operation is performed in the following procedure.
[0035]
First, as shown in FIG. 5A, the ECU 51 simultaneously turns on the FETs 71 and 72 provided in the open-side drive circuit 65 of the drive circuit 61 to operate the electric motor 25 in the forward direction, that is, in the open direction, to thereby activate the drum 36. Is rotated in the opening direction. As a result, the vehicle rear side of the cable 23 is wound around the drum 36, and the slide door 13 starts moving toward the fully open position while being pulled by the cable 23. At this time, the ECU 51 starts detecting the moving direction and the moving speed of the slide door 13 by the pulse signal from the Hall IC 29, and starts detecting the position of the slide door 13 by the pulse signal from the Hall IC 38. When it is detected that the slide door 13 has moved to the fully open position, the FETs 71 and 72 are simultaneously turned off and the electric motor 25 is stopped.
[0036]
Conversely, when the driver operates the open / close switch when the slide door 13 is fully opened and a command signal for operating the slide door 13 in the closing direction is input to the ECU 51, the ECU 51 automatically closes the slide door 13. Will be activated. This automatic closing operation is performed in the following procedure.
[0037]
First, as shown in FIG. 5B, the ECU 51 simultaneously turns on the FETs 77 and 78 provided in the closing drive circuit 66 of the drive circuit 61 to operate the electric motor 25 in the reverse direction, that is, in the closing direction, thereby causing the drum 36 to operate. Rotate in the closing direction. Thereby, the vehicle front side of the cable 23 is wound up by the drum 36, and the slide door 13 starts moving toward the fully closed position while being pulled by the cable 23. At this time, the ECU 51 starts detecting the moving direction and the moving speed of the slide door 13 by the pulse signal from the Hall IC 29, and starts detecting the position of the slide door 13 by the pulse signal from the Hall IC 38. Then, when the slide door 13 moves to the fully closed position, the FETs 77 and 78 are simultaneously turned off and the electric motor 25 is stopped. By operating the open / close switch again while the sliding door 13 is being opened or closed by the automatic opening operation or the automatic closing operation, the sliding door 13 is stopped at an intermediate position between the fully open position and the fully closed position. Can be done. In this manner, the power sliding door device 12 can automatically open and close the sliding door 13 in the opening direction and the closing direction by operating the open / close switch.
[0038]
In the power sliding door device 12, when the vehicle 11 is running or may start running, the ECU 51 sets the automatic opening operation prohibition mode to operate the electric motor 25 in the opening direction, that is, to operate the sliding door 13. The automatic opening operation is prohibited. The automatic opening operation inhibition mode is set when the vehicle speed of the vehicle 11 is detected by the vehicle speed sensor 56, that is, when it is detected that the vehicle speed of the vehicle 11 is equal to or higher than a predetermined value and the vehicle is running, When the detection sensor 45 detects that the select lever 44 has selected a position other than the parking position, that is, the parking range P, the setting is set by the ECU 51 as opening direction operation inhibiting means.
[0039]
When the position of the slide door 13 is at an intermediate position between the fully open position and the fully closed position in the state where the automatic opening operation prohibition mode is set, the ECU 51 sets the drive circuit as shown in FIG. Only the 61 FET 78 is turned ON, and the other FETs 71, 72, 77 are turned OFF. When the automatic opening operation prohibition mode is set, the ECU 51 maintains the drive circuit 61 in a state where only the FET 78 is turned on and the other FETs 71, 72 and 77 are turned off even if the open / close switch is operated in the opening direction. The automatic opening operation of the slide door 13 is not performed. In the present embodiment, when the slide door 13 is at the intermediate position, only the FET 78 of the drive circuit 61 is turned on, and the other FETs 71, 72, and 77 are turned off. Instead, it may be set when the slide door 13 is at the fully open position.
[0040]
Here, the drive circuit 61 includes a loop circuit 83 as a short circuit that connects or short-circuits the power supply terminal 26 and the power supply terminal 27 with an open-side connection circuit 68 on the low potential side and a closed-side connection circuit 76 on the low potential side. Is formed. When the automatic opening operation inhibition mode is set, only the FET 78 is turned on and the other FETs 71, 72, 77 are turned off, so that the loop circuit 83 is connected from the power supply terminal 26 to the low potential side closed side. A current flows in a direction toward the power supply terminal 27 through the connection circuit 76 and the low-potential-side open-side connection circuit 68, and the low-potential-side open-side connection circuit 68 and the low-potential-side closed-side connection circuit are supplied from the power supply terminal 27. The current in the direction toward the power supply terminal 26 via the terminal 76 does not flow. That is, since the FET 72 as the rectifying means has a rectifying function, when the FET 72 is turned off, the loop circuit 83 is connected to the low potential side closed side connection circuit 76 and the low potential side open side connection circuit 68 from the power supply terminal 26. And a current flowing from the power supply terminal 27 to the power supply terminal 26 via the low-potential-side open-side connection circuit 68 and the low-potential-side closed-side connection circuit 76. Cut it off. At this time, since the FET 78 is turned ON and the current flows in any direction, the direction of the current flowing through the loop circuit 83 is controlled only by the rectifying function of the FET 72. Therefore, each of the power supply terminals 26 and 27 of the electric motor 25 is connected to a current flowing from the power supply terminal 26 to the power supply terminal 27 via the low-potential-side closed connection circuit 76 and the low-potential-side open-side connection circuit 68. Is in a short-circuited state, that is, a closed state, and is opened to a current flowing from the power supply terminal 27 to the power supply terminal 26 via the low-potential-side open connection circuit 68 and the low-potential-side closed connection circuit 76. State, that is, open state.
[0041]
Further, since the slide door 13 is connected to the rotation shaft 25a of the electric motor 25, when the slide door 13 is moved in the opening and closing direction, the rotation shaft 25a is rotated in the opening and closing direction in conjunction with the movement. Become. At this time, if the power supply terminals 26 and 27 of the electric motor 25 are connected or short-circuited to each other, an induced electromotive force is generated between the power supply terminals 26 and 27 when the rotation shaft 25a is rotated in the opening direction. An induced current is generated from the power supply terminal 27 toward the power supply terminal 26 via the electric motor 25, and when the rotating shaft 25a is rotated in the closing direction, an induced electromotive force is generated between the power supply terminals 26 and 27, and An induced current directed toward the power supply terminal 27 via the electric motor is generated.
[0042]
Therefore, when the automatic opening operation inhibition mode is set, when the sliding door 13 moves from the intermediate position in the opening direction, that is, when the electric motor 25 rotates in the opening direction, the induced current flows in the direction. Since the loop circuit 83 is short-circuited, an induced current flows through the loop circuit 83. When the induced current flows through the loop circuit 83, the electric motor 25 generates a regenerative braking force in a direction that suppresses the movement of the slide door 13 in the opening direction, and the slide door 13 generates a regenerative braking force in the opening direction. A braking force is applied to suppress the movement.
[0043]
On the other hand, when the slide door 13 is moved in the closing direction from the intermediate position when the automatic opening operation prohibition mode is set, that is, with respect to the direction of the induced current generated when the electric motor 25 rotates in the closing direction. Since the loop circuit 83 is open, no induced current flows through the loop circuit 83. When the slide door 13 is moved in the closing direction, no induced current flows through the loop circuit 83, so that no regenerative braking force is generated by the electric motor 25 and the slide door can be easily moved. Is done. That is, when the automatic opening operation prohibition mode is set, the sliding door 13 is in a state where regenerative braking force is applied in the opening direction and its movement is suppressed, but regenerative braking force is applied in the closing direction. It is in a state that can be easily moved.
[0044]
Since the FETs 77 and 78 have a rectifying function, the power supply terminals 26 and 27 of the electric motor 25 are connected to the positive drive voltage terminal 63 via the electric motor 25 from the ground terminal 64 by the closing drive circuit 66. Becomes a short-circuited state, that is, a closed state. However, when the sliding door 13 moves in the closing direction due to manual operation, own weight, or the like, the rotation speed of the electric motor 25 hardly reaches the no-load rotation speed. Never exceed. Therefore, the induced current does not go to the positive power supply voltage terminal 63 via the FET 77 due to the potential difference in this portion, and the power supply terminals 26 and 27 are substantially opened in a current circuit.
[0045]
As described above, in the power sliding door device 12, when the automatic opening operation inhibition mode is set, that is, when the vehicle 11 is running or may start running, the sliding door 13 at the intermediate position is in the opening direction. , A regenerative braking force is applied, and no regenerative braking force is applied in the closing direction. Therefore, the slide door 13 opened at the intermediate position while the vehicle 11 is running or may be running easily even when the vehicle 11 is suddenly started or is on a slope rising forward. The sliding door 13 does not move in the opening direction, that is, the sliding door 13 is prevented from moving in the opening direction due to the acceleration of the vehicle 11 starting or the weight of the sliding door, and the opening of the sliding door 13 is suppressed. Further, even when the automatic opening operation prohibition mode is set, since the regenerative braking force is not applied when the slide door 13 moves in the closing direction, the occupant or the like manually closes the slide door 13. In this case, the power sliding door device 12 can be easily moved, and the safety of the power sliding door device 12 can be improved.
[0046]
Note that, even when the automatic open operation inhibition mode is set, if the close side of the open / close switch is operated, the ECU 51 turns on the FET 77 and the FET 78 of the drive circuit 61 at the same time, and connects the FET 71 and the FET 72 with each other. At the same time, the slide door 13 is turned OFF, and is moved toward the fully closed position by the automatic closing operation.
[0047]
The present invention is not limited to the above-described embodiment, and it goes without saying that various changes can be made without departing from the scope of the invention. For example, in the present embodiment, the opening / closing member is the slide door 13 that opens and closes in the vehicle front-rear direction along the side surface of the vehicle 11, but is not limited thereto. Other opening and closing members may be used, such as a back door that can be freely opened and closed.
[0048]
In the present embodiment, the short circuit is a loop circuit 83 formed by the low-potential-side open-side connection circuit 68 and the low-potential-side closed-side connection circuit 76, but is not limited to this. As shown in FIG. 7, a loop circuit 84 as a short circuit is formed by the high-potential-side open-side connection circuit 67 and the high-potential-side close-side connection circuit 75. When the automatic open operation inhibition mode is set, the four FETs 71 , 72, 77, 78, only the FET 77 as the switching element on the closed side may be turned on, and the other FETs 71, 72, 78 may be turned off.
[0049]
Furthermore, in the present embodiment, the automatic opening operation inhibition mode is set when the vehicle speed is detected or when the select lever 44 selects a position other than the parking position, but is not limited to this. Other conditions may be detected and set, such as when the parking brake provided on the vehicle is released.
[0050]
【The invention's effect】
According to the present invention, the opening / closing member is opened because the regenerative braking force is applied in the opening direction and the regenerative braking force is not applied in the closing direction when the vehicle is running or may start running. The opened / closed member in the state does not easily move in the opening direction even when the vehicle suddenly starts or is on a slope rising forward, and an occupant or the like easily closes the opened / closed member manually. As a result, the safety of the vehicular automatic opening / closing device is improved.
[Brief description of the drawings]
FIG. 1 is a plan view schematically showing a vehicle equipped with a power sliding door device according to an embodiment of the present invention.
FIG. 2 is an enlarged view showing details of the power sliding door device shown in FIG.
FIG. 3 is an explanatory diagram showing a control system of the power sliding door device shown in FIG.
FIG. 4 is a circuit diagram showing details of a drive circuit shown in FIG. 3;
5A is a circuit diagram showing an operation state of a drive circuit when the slide door is automatically opened, and FIG. 5B is a circuit diagram showing an operation state of the drive circuit when the slide door is automatically closed. FIG.
FIG. 6 is a circuit diagram showing an operation state of a drive circuit in an automatic opening operation inhibition mode.
FIG. 7 is a circuit diagram showing a modification of the operation state of the drive circuit in the automatic opening operation inhibition mode.
[Explanation of symbols]
11 vehicles
12. Power sliding door device
13 Sliding door
14 arm
15 Roller Assy
16 slide rail
16a music
17 Stopper rubber
18 Second Seat
19 Third sheet
21,22 Reverse pulley
23 Cable
24 slide actuator
25 Electric motor
25a Rotary axis
26, 27 power supply terminal
28 Multi-pole magnetized magnet
29 Hall IC
31 Drive gear
32 Large diameter spur gear
33 Small diameter spur gear
34 driven gear
35 Output shaft
36 drums
37 Multi-pole magnetized magnet
38 Hall IC
41, 42 tensioner
43 Shift operation unit
44 Select lever
45 Range detection sensor
51 Control Unit (ECU)
52 Microprocessor (CPU)
53 ROM
54 RAM
55 I / O port
56 Vehicle speed sensor
61 Drive circuit
62 Battery
63 Positive power supply voltage terminal
64 Ground terminal
65 Open side drive circuit
66 Close-side drive circuit
67 High-side open circuit
68 Low side open side connection circuit
71,72 Power MOS FET
71a, 72a Gate
73, 74 Diode
75 High-side closed circuit
76 Low-side closed circuit
77,78 Power MOS FET
77a, 78a Gate
81,82 Diode
83,84 loop circuit

Claims (4)

An automatic opening / closing device for a vehicle that automatically opens and closes an opening / closing member that is openably and closably mounted on a vehicle,
An electric motor coupled to the opening and closing member, for driving the opening and closing member in an opening direction and a closing direction,
A short circuit connected to one power supply terminal and the other power supply terminal provided in the electric motor,
Opening direction operation prohibition means for prohibiting operation of the electric motor in the opening direction when the vehicle is running or may start running,
An electric current generated when the electric motor rotates in the opening direction is supplied when the operation of the electric motor in the opening direction is prohibited by the opening direction operation prohibiting means. Rectifying means for interrupting the induced current generated when the motor rotates in the closing direction,
An automatic opening / closing device for a vehicle, wherein a regenerative braking force is applied to the opening / closing member in the opening direction and no regenerative braking force is applied to the opening / closing member when the vehicle is running or may start running. 2. The automatic opening and closing device for a vehicle according to claim 1, wherein when the vehicle speed of the vehicle is detected, or when a select lever provided on the vehicle is set to a position other than a parking position, the opening direction operation prohibiting unit is configured to control the electric power to open. An automatic opening and closing device for a vehicle, wherein operation of the motor in an opening direction is prohibited. 3. The automatic open / close device for a vehicle according to claim 1, wherein the one power supply terminal and the high potential side power supply terminal connect the one power supply terminal and the high potential side power supply terminal, respectively, and the other power supply terminal and the low potential side. Two open-side switching elements provided in a low-potential-side open-side connection circuit for connecting to a power supply terminal and having a rectifying function of flowing only a current flowing from the low-potential-side power supply terminal to the high-potential-side power supply terminal. An open-side drive circuit having a high-potential-side closed-side connection circuit that connects the other power supply terminal and the high-potential-side power supply terminal, and the one power supply terminal and the low-potential-side power supply terminal. A full-bridge circuit including a closed-side drive circuit having two closed-side switching elements provided in a low-side closed-side connection circuit to be connected; Closed connection on the potential side The short circuit is formed by the circuit or the open connection circuit on the low potential side and the closed connection circuit on the low potential side, and the operation of the electric motor in the opening direction is prohibited by the opening direction operation prohibiting means. An automatic opening / closing device for a vehicle, wherein only one of the four switching elements is switched to a connected state. The automatic opening / closing device for a vehicle according to any one of claims 1 to 3, wherein the opening / closing member is mounted movably in a vehicle front-rear direction along a side surface of the vehicle. .

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