JP6915416B2 - Open / close body control device - Google Patents

Description

The present invention relates to an opening / closing body control device.

Conventionally, a power slide door device (opening / closing device) including an opening / closing body driving device for driving an opening / closing body for opening / closing a door opening of a vehicle and an opening / closing body control device for controlling the operation of the driving device has been known. (For example, Patent Document 1 and Patent Document 2). For example, in the opening / closing device of Patent Document 1, the sliding door is opened / closed in the front-rear direction of the vehicle by applying a driving force of a motor to the sliding door as the opening / closing body. Further, in the opening / closing body device of Patent Document 2, the back door is opened / closed by applying a driving force of a motor to the back door as the opening / closing body.

In the opening / closing device shown in Patent Document 1 and Patent Document 2, an electromagnetic clutch is provided between the motor that applies a driving force to the opening / closing body and the opening / closing body. The electromagnetic clutch is an electromagnetic clutch that is interlocked with a motor and is provided so that it can move in the axial direction, a rotor that is arranged coaxially with the amercha in a state where it can rotate relative to the amercha, and an electromagnetic that generates an electromagnetic attraction force by energization. It is equipped with a coil. The control device switches the state of the electromagnetic clutch between the connected state and the disconnected state by energizing or cutting off the energization of the electromagnetic coil of the electromagnetic clutch. When the electromagnetic coil is energized, the electromagnetic attraction generated in the electromagnetic coil causes the armature and the rotor to come into pressure contact with each other, so that the electromagnetic clutch is switched to the connected state. When the energization of the electromagnetic coil is cut off, the electromagnetic attraction force of the electromagnetic coil disappears, so that the pressure contact between the armature and the rotor is released. When the electromagnetic clutch is in the connected state, the driving force from the motor is applied to the opening / closing body via the electromagnetic clutch, whereas when the electromagnetic clutch is in the disconnected state, the driving force from the motor is not transmitted to the opening / closing body. ..

Japanese Unexamined Patent Publication No. 2003-1408048 Japanese Unexamined Patent Publication No. 2013-87477

The opening / closing body control device has an abnormality detection function of the electromagnetic clutch. The opening / closing body control device detects the current flowing through the electromagnetic coil of the electromagnetic clutch, and if a predetermined current flows through the electromagnetic coil, it determines that no abnormality has occurred in the electromagnetic clutch, and the predetermined current flows through the electromagnetic coil. If it did not flow, it was judged that an abnormality had occurred in the electromagnetic clutch. This is because when a predetermined current flows through the electromagnetic coil, it is considered that an electromagnetic attraction force that causes the armature and the rotor to come into pressure contact with each other is generated from the electromagnetic coil, so that the electromagnetic clutch can be connected or disconnected. This is because it is considered. However, even if a predetermined current flows through the electromagnetic coil, some abnormality occurs between the part of the electromagnetic clutch excluding the electromagnetic coil (the connecting / disconnecting part of the electromagnetic clutch), that is, between the amercha and the rotor, so that the amercha and the rotor It is also possible that the and cannot be pressure-welded. In such a case, although the electromagnetic clutch is actually abnormal so that the armature and the rotor cannot be pressed against each other, the electromagnetic clutch is abnormal because a predetermined current flows through the electromagnetic coil. It will be judged that it is not.

An object of the present invention is to provide an opening / closing body control device capable of more reliably detecting an abnormality in an electromagnetic clutch.

The opening / closing body control device capable of achieving the above object is an opening / closing body control device including a control unit for controlling an opening / closing body driving device for opening / closing the opening / closing body of the vehicle. A motor that generates a driving force to be used, an electromagnetic clutch that connects and disconnects a driving force transmission path between the motor and the opening / closing body, a lock device that holds the opening / closing body at a predetermined position, and an opening / closing operation for opening / closing the opening / closing body. The opening / closing operation detecting unit for detecting the opening / closing operation of the electromagnetic clutch and the rotation detecting unit for detecting the rotation of the motor are provided, and the control unit is held by the opening / closing body by the locking device as an abnormality detection process of the electromagnetic clutch. In this state, when the electromagnetic clutch is controlled to connect the transmission path of the driving force and the motor generates the driving force to open and close the opening / closing body, the rotation detection unit causes the motor to operate. An abnormality of the electromagnetic clutch is detected based on the detection that the clutch is rotating.

According to this configuration, as an abnormality detection process of the electromagnetic clutch, the control unit is operated by the motor when the opening / closing body is held by the lock device and when the motor and the rotating body are connected to each other. Generates a driving force that opens and closes. When the opening / closing body is fixed by the locking device and the motor and the opening / closing body are connected, the motor does not rotate unless an abnormality has occurred in the electromagnetic clutch. Therefore, the control unit can detect an abnormality in the electromagnetic clutch when the rotation detection unit detects that the motor is rotating.

By the way, as a comparative example, it is also conceivable to detect an abnormality in the electromagnetic clutch based on the value of the current flowing through the electromagnetic coil of the electromagnetic clutch. In this case, the abnormality of the electromagnetic clutch is determined based on whether or not the current value of the electromagnetic coil is equal to or greater than the threshold value. The determination detects an abnormality in the electromagnetic clutch based on the fact that the electromagnetic coil generates a predetermined electromagnetic force. In the determination, the machine of the electromagnetic clutch even if the electromagnetic force is generated by the electromagnetic coil. It is not possible to detect an abnormality in the electromagnetic clutch even when an abnormality has occurred in which the target disconnection portion cannot be accurately disconnected.

In this respect, in the present embodiment, it is based on whether or not the motor rotates when the opening / closing body is fixed by the locking device and when the motor and the opening / closing body are connected by an electromagnetic clutch. Since the abnormality of the electromagnetic clutch is detected, the abnormality of the mechanically disconnected portion of the electromagnetic clutch can also be detected. Therefore, the abnormality of the electromagnetic clutch can be detected more reliably.

In the opening / closing body control device, a pulse sensor for detecting a pulse generated in response to the rotation of the motor is provided as the rotation detection unit, and the control unit is the number of the pulses detected by the pulse sensor. When is greater than or equal to the threshold value, it is preferable to detect the abnormality of the electromagnetic clutch, assuming that the rotation detection unit has detected that the motor is rotating.

According to this configuration, when the number of pulses detected by the pulse sensor is equal to or greater than the threshold value, it is considered that the motor has actually rotated. If the opening / closing body is fixed by the locking device and the motor and the rotating body are connected, even if the driving force is generated by the motor, if there is no abnormality in the electromagnetic clutch, Since the motor does not rotate, the number of pulses does not exceed the threshold. Therefore, the control unit can detect the abnormality of the electromagnetic clutch based on whether or not the number of pulses is equal to or greater than the threshold value.

In the opening / closing body control device, when the electromagnetic clutch is not abnormal and the opening / closing body is held by the locking device, the threshold value of the driving force is increased by controlling the electromagnetic clutch. When the transmission path is connected, it is preferable that the determination is made in consideration of the play amount of the opening / closing body driving device and the rotation of the motor due to the driving force generated by the motor.

According to this configuration, when an abnormality has not occurred in the electromagnetic clutch, an abnormality in the electromagnetic clutch is erroneously detected based on the fact that the motor is rotated by the amount of play of the opening / closing body driving device due to the driving force generated by the motor. Is suppressed. Therefore, the abnormality of the electromagnetic clutch can be detected more reliably.

In the opening / closing body control device, when the opening / closing body is held by the locking device and the motor generates a driving force for opening / closing the opening / closing body, the motor causes the opening / closing body by the locking device. It is preferable to generate a driving force that does not exceed the force for holding the.

According to this configuration, the driving force generated by the motor does not exceed the force for holding the open / close body by the locking device, so that the motor is erroneously rotated based on the fact that the electromagnetic clutch is normal. It is suppressed that it is determined that an abnormality of the electromagnetic clutch has occurred. Therefore, the abnormality of the electromagnetic clutch can be detected more reliably.

In the above-mentioned opening / closing body control device, it is preferable that the locking device is a latch mechanism.

According to the opening / closing body control device of the present invention, an abnormality of the electromagnetic clutch can be detected more reliably.

The block diagram which shows the schematic structure of the power slide door device. The schematic diagram for demonstrating the torque transmission path between a motor which is a drive source, and a slide door which is a drive target. Schematic cross-sectional view of an electromagnetic clutch. The flowchart which shows the procedure of determining the abnormality of the electromagnetic clutch performed in the door ECU.

Hereinafter, an embodiment in which the opening / closing body control device is embodied as a power slide door device will be described.
As shown in FIG. 1, the power slide door device 1 includes a slide door 2 as an opening / closing body, a door actuator 10 as a driving device for driving the sliding door 2, and an opening / closing body control for controlling the operation of the door actuator 10. It includes a door ECU 20 (electronic control device) as a device.

The sliding door 2 is supported on the side surface of a vehicle (not shown). When the occupant moves the slide door 2 in the front-rear direction of the vehicle, the door opening provided on the side surface of the vehicle opens and closes. Specifically, by moving the sliding door 2 to the front side of the vehicle (left side in FIG. 1), the sliding door 2 is in a fully closed state in which the door opening is closed, and moves to the rear side of the vehicle (right side in FIG. 1). By doing so, the occupant can get on and off through the door opening in a fully open state. Further, the slide door 2 is provided with a door handle 3 for opening and closing the slide door 2. The door handle 3 may be an inner handle provided inside the vehicle interior or an outer handle provided outside the vehicle interior.

Further, the slide door 2 is provided with a plurality of lock devices 5 having a latch mechanism 4 that engages with a striker (not shown) provided on the vehicle body side according to the moving position of the slide door 2. Specifically, the slide door 2 is provided with four lock devices 5, a front lock 5a, a rear lock 5b, a fully open lock 5c, and a neutral lock 5d. The front lock 5a and the rear lock 5b function as fully closed locks that hold the slide door 2 in the fully closed position. The fully open lock 5c is for holding the slide door 2 in the fully open position. The neutral lock 5d is for holding the slide door 2 in a predetermined neutral position between the fully open position and the fully closed position. Then, these lock devices 5 (5a to 5d) are mechanically connected to the door handle 3 via a transmission member such as a wire extending from the remote controller 6.

By operating the operation unit 3a provided on the door handle 3, the engagement state of the latch mechanism 4 constituting each lock device 5 with the vehicle body (striker) is released. As a result, the occupant can grasp the door handle 3 and open / close the slide door 2. For example, when the latch mechanism 4 is in the engaged state, the slide door 2 is held at a predetermined position, but when the latch mechanism 4 is released from the engaged state with the vehicle body, the slide is in the fully closed position. In addition to allowing the door 2 to move in the opening direction, the sliding door 2 in the fully open position is allowed to move in the closing direction.

Further, the power slide door device 1 can automatically open and close the slide door 2 by operating the operation input unit 21. The operation input unit 21 is provided in, for example, a door handle 3, a portable device (for example, a remote control key), a vehicle interior, or the like.

Specifically, the door actuator 10 has a motor 11 that serves as a drive source for a driving force that opens and closes the slide door 2. The door ECU 20 controls the operation of the door actuator 10 by supplying driving power to the motor 11. The door actuator 10 has a reduction mechanism 12 that decelerates the rotation of the motor 11, and an opening / closing body driving unit 13 that opens and closes the slide door 2 via a drive cable (not shown) by rotating based on the driving force of the motor 11. And have. The door ECU 20 generates drive power to be supplied to the motor 11 based on the power supply voltage Vb of the vehicle-mounted power supply 30 (battery). Then, the power slide door device 1 opens and closes the slide door 2 by transmitting the rotation of the motor 11 decelerated by the speed reduction mechanism 12 to the opening / closing body drive unit 13 of the slide door 2.

More specifically, the door actuator 10 is provided with a pulse sensor 14 (rotation detection unit) that generates a pulse signal Sp synchronized with the operation of the opening / closing body drive unit 13. As the pulse sensor 14, for example, a position sensor is adopted. The door ECU 20 detects the moving position X of the sliding door 2 and the moving speed V of the sliding door 2 by counting the pulse signal Sp. Further, the operation input signal S1 is input to the door ECU 20 by operating the operation input unit 21. The door ECU 20 controls the operation of the door actuator 10 in order to open / close (or stop) the slide door 2 based on the input of the operation input signal S1, the moving position X, and the moving speed V.

Further, the door ECU 20 controls the operation of each lock device 5 through the output of the lock control signal S2. Specifically, when the door ECU 20 opens and closes the slide door 2 in the fully open position or the fully closed position, the door ECU 20 is first engaged with the vehicle body before starting the drive control of the slide door 2. The operation of the lock device 5 is controlled in order to release the latch mechanism 4 (release control). Then, when the door ECU 20 executes control to move the slide door 2 from the fully open position to the fully closed position, when the latch mechanism 4 of the lock device 5 is in the half-latch state, the latch mechanism 4 shifts to the full-latch state. The operation of the lock device 5 is controlled (close control). Further, when the door ECU 20 executes control for moving the slide door 2 from the fully closed position to the fully open position, when the latch mechanism 4 of the lock device 5 is in the half-latch state, the latch mechanism 4 shifts to the full-latch state. The operation of the lock device 5 is controlled so that the lock device 5 can be operated.

Various sensor switches 22 for detecting the operating state of the latch mechanism 4 are connected to the door ECU 20. Specifically, as the sensor switch 22, a half-latch switch 22a, a full-latch switch 22b, and a pole switch 22c are connected to the door ECU 20. The door ECU 20 detects the engaged state (half-latch state, full-latch state, and release state) of the latch mechanism 4 based on the output signals Sw1 to Sw3 of each of these sensor switches 22 (22a to 22c). That is, the door ECU 20 can detect whether or not the slide door 2 is fixed by the latch mechanism 4 based on the output signals Sw1 to Sw3.

Further, the door actuator 10 includes an electromagnetic clutch 15 capable of connecting (connecting and disconnecting) the torque transmission path of the motor 11 which is the drive source thereof. The operation of the electromagnetic clutch 15 is controlled by the door ECU 20.

As shown in FIG. 2, the driving force of the motor 11 is transmitted to the slide door 2 to be driven via the speed reduction mechanism 12, the electromagnetic clutch 15, and the opening / closing body driving unit 13. Therefore, when the door ECU 20 opens the electromagnetic clutch 15, the torque transmission path of the motor 11 is cut off, so that the driving force generated by the motor 11 is not transmitted to the slide door 2. On the other hand, when the door ECU 20 connects the electromagnetic clutch 15, the torque transmission path of the motor 11 is connected, so that the driving force generated by the motor 11 is transmitted to the slide door 2. The door ECU 20 controls the electromagnetic clutch 15 to be in the open state when the sliding door 2 is manually opened and closed while the occupant is holding the door handle 3. As a result, the torque transmission path of the motor 11 is cut off, so that the slide door 2 can be manually opened and closed smoothly.

As shown in FIG. 3, the reduction mechanism 12 has a worm gear 43 that rotates integrally with the rotation shaft of the motor 11 and a wheel gear 44 that meshes with the worm gear 43. The electromagnetic clutch 15 has an electromagnetic coil 40, an armature 41, and a rotor 42. The armature 41 is provided so as to be rotatable integrally with the wheel gear 44 of the reduction mechanism 12, and is also provided so as to be movable in the axial direction with respect to the wheel gear 44. The rotor 42 is coaxially arranged so as to be rotatable relative to the armature 41, and is provided so as to be integrally rotatable with the output shaft of the opening / closing body drive unit 13. As shown in FIG. 2, the electromagnetic coil 40 is connected to the door ECU 20. The door ECU 20 generates an electromagnetic attraction force from the electromagnetic coil 40 by supplying a current Ic to the electromagnetic coil 40. Based on the electromagnetic attraction force generated in the electromagnetic coil 40, the armature 41 is attracted to the rotor 42, so that the armature 41 and the rotor 42 are in pressure contact with each other.

Next, the configuration of the door actuator 10 will be described in detail.
As shown in FIG. 3, the door actuator 10 includes an accommodating member 60 accommodating the speed reduction mechanism 12 and the electromagnetic clutch 15. The accommodating member 60 is formed by assembling a motor housing 60a that integrally holds the motor 11 that is a drive source and a clutch case 60b that accommodates the electromagnetic clutch 15. The motor 11 is held in the motor housing 60a with a rotating shaft (not shown) inserted inside. A worm gear 43 that rotates integrally with the rotating shaft is fixed to the rotating shaft of the motor 11.

Further, the reduction mechanism 12 has a worm gear 43 and a wheel gear 44. A wheel gear 44 that meshes with the worm gear 43 is rotatably housed in the motor housing 60a.

The motor housing 60a is provided with an output shaft 45 that is rotatably supported while penetrating the motor housing 60a in the axial direction (left-right direction in FIG. 3). Specifically, the output shaft 45 is inserted through the opening 61 formed in the motor housing 60a. An annular ball bearings 46 and 47 that rotatably support the output shaft 45 are provided on the inner surface of the opening 61 and the portion of the clutch case 60b facing the opening 61, respectively. An annular slide bearing 48 is provided at a central portion (inner surface) of the wheel gear 44, which is the center of rotation. The wheel gear 44 is supported in a state where the end portion (left end in FIG. 3) in the axial direction of the wheel gear 44 is slidably in contact with the motor housing 60a by inserting the output shaft 45 into the slide bearing 48. ing.

Further, inside the accommodating member 60, an armer 41 that is movably supported by the wheel gear 44 in the axial direction and rotates integrally with the wheel gear 44 is provided, and is relative to the wheel gear 41. The rotor 42 is provided in a rotatable state. The rotor 42 is arranged coaxially with the rotation shafts of the armature 41 and the motor 11, and is rotatably supported integrally with the output shaft 45. The armature 41 and the rotor 42 are made of a magnetic material such as iron.

An electromagnetic coil 40 that generates a magnetic field (magnetic attraction force) by energization is provided in the clutch case 60b. The electromagnetic coil 40 functions as an electromagnet that press-contacts the armature 41 and the rotor 42 based on the electromagnetic attraction generated by being energized by the door ECU 20. Further, in the clutch case 60b, a yoke 49 having an annular outer diameter surrounding the end portion (right end portion in FIG. 3) of the output shaft 45 is provided. The yoke 49 is fixed to the wall surface of the clutch case 60b by the screw member 50. Like the armature 41 and the rotor 42, the yoke 49 is made of a magnetic material such as iron. The electromagnetic coil 40 is held by a yoke 49 arranged so as to surround it. By energizing the electromagnetic coil 40, the door ECU 20 forms a magnetic circuit M on the yoke 49 and the rotor 42 arranged at positions surrounding the electromagnetic coil 40.

When the electromagnetic coil 40 is energized, the armature 41 is attracted to the rotor 42, so that the armature 41 and the rotor 42 are connected so that torque can be transmitted by pressure-contacting their facing surfaces. It is configured in. In this way, the door ECU 20 has an open state in which the armature 41 and the rotor 42 can rotate relative to each other based on the energization control of the electromagnetic coil 40, and a connected state in which the armature 41 and the rotor 42 are connected so as to be able to transmit torque. By switching between, the disconnection and disconnection of the electromagnetic clutch 15 is controlled.

A disk-shaped wave washer 51 is interposed between the armature 41 and the wheel gear 44 that supports the armature 41. The wave washer 51 is a well-known one in which wavy irregularities are alternately formed along its circumferential direction. The wave washer 51 is interposed between the armature 41 and the wheel gear 44. Further, inside the clutch case 60b, a magnet 52 fixed to the outer circumference of the rotor 42 is provided. Further, inside the clutch case 60b, a magnetic detection element 16 (see FIG. 1, omitted in FIG. 2) is provided at a position facing the magnet 52 on the radial outer side of the rotor 42. The rotation detection unit is formed by the magnet 52 and the magnetic detection element 16 that generates an output signal based on the magnetic field generated by the magnet 52. The rotation detection unit detects the rotation of the rotor 42 based on the output signal generated by the magnetic detection element 16. The pulse sensor 14 (position sensor) counts the rotation of the rotor 42 detected by the rotation detector, and detects the moving position X and the moving speed V of the slide door 2 based on the count number.

Next, a procedure for determining an abnormality (failure) of the electromagnetic clutch 15 performed by the door ECU 20 will be described. The process of determining the abnormality of the electromagnetic clutch 15 may be started by, for example, pressing a trigger such as a newly provided switch at a timing when the occupant wants to execute the abnormality determination process of the electromagnetic clutch 15. Further, the process of determining the abnormality of the electromagnetic clutch 15 may be repeatedly executed at a predetermined cycle. Further, it may be executed immediately before the fixing by the latch mechanism 4 is released at the time of opening the slide door 2.

As shown in the flowchart of FIG. 4, the door ECU 20 determines whether or not the sliding door 2 is fixed by the latch mechanism 4 (step S1).
When it is determined that the sliding door 2 is fixed by the latch mechanism 4 (YES in step S1), the door ECU 20 energizes the electromagnetic clutch 15 (step S2) and then energizes the motor 11 (step S3). .. Specifically, when the door ECU 20 detects that the engagement state of the latch mechanism 4 is the full latch state based on the output signal Sw2 of the full latch switch 22b, the slide door 2 is fixed by the latch mechanism 4. Judge as a thing. Then, the door ECU 20 press-contacts the armature 41 and the rotor 42 based on the electromagnetic attraction generated by energizing the electromagnetic coil 40 of the electromagnetic clutch 15, and brings the electromagnetic clutch 15 into a connected state. When the electromagnetic clutch 15 is connected, the motor 11 does not rotate even if the motor 11 is energized while the slide door 2 is fixed by the latch mechanism 4. The energization amount of the motor 11 is set to such an extent that the pressure contact between the armature 41 and the rotor 42 is not released when the electromagnetic clutch 15 is not abnormal due to the rotation of the motor 11 based on the energization amount. Further, the energization amount of the motor 11 is set so as not to exceed the holding force of the slide door 2 by the latch mechanism 4 when the electromagnetic clutch 15 does not have an abnormality due to the rotation of the motor 11 based on the energization amount.

Next, the door ECU 20 determines whether or not the number of pulses P detected by the pulse sensor 14 is equal to or greater than the threshold value P0 (step S4). Even if the electromagnetic clutch 15 is connected and the slide door 2 is fixed by the latch mechanism 4, it is considered that the motor 11 rotates to the extent of play of the reduction mechanism 12. As an example, when a belt for transmitting the rotational force of the motor 11 to the deceleration mechanism 12 is provided between the motor 11 and the deceleration mechanism 12, it is considered that the belt rotates by about the deflection of the belt. The threshold value P0 is set to about the number of pulses for distinguishing whether or not the motor 11 is substantially rotating in consideration of play of the deceleration mechanism 12.

When the number of pulses P detected by the pulse sensor 14 is less than the threshold value P0 (NO in step S4), the door ECU 20 determines that an abnormality in the electromagnetic clutch 15 has not occurred (step S5). In this case, since it is considered that the motor 11 is not rotating, it is considered that the motor 11 has stopped rotating because the electromagnetic clutch 15 is actually in the connected state. Therefore, the door ECU 20 determines that the abnormality of the electromagnetic clutch 15 has not occurred based on the fact that the number of pulses P is detected from the pulse sensor 14 only about the threshold value P0 or less.

When the number of pulses P detected by the pulse sensor 14 is equal to or greater than the threshold value P0 (YES in step S4), the door ECU 20 determines that an abnormality in the electromagnetic clutch 15 has occurred (step S6). In this case, since it is considered that the motor 11 is rotating, it is considered that the motor 11 is rotating because the electromagnetic clutch 15 is not actually in the connected state, that is, in the open state. This is because when the number of pulses P is equal to or greater than the threshold value P0, the amount of rotation of the motor 11 exceeds the amount that can be rotated by the play of the reduction mechanism 12. Therefore, it is determined that an abnormality has occurred in the electromagnetic clutch 15 that connects the torque transmission path between the motor 11 that is the drive source and the slide door 2 that is the drive target.

Further, when the door ECU 20 cannot determine that the sliding door 2 is fixed by the latch mechanism 4 (NO in step S1), the door ECU 20 ends the process.
As described above, the process of determining the abnormality of the electromagnetic clutch 15 performed by the door ECU 20 is completed.

The operation and effect of this embodiment will be described.
(1) With reference to FIG. 2, it will be described that the abnormality of the electromagnetic clutch 15 can be detected more reliably.

First, as a comparative example, a case where an abnormality of the electromagnetic clutch 15 is determined by detecting the current Ic flowing through the electromagnetic coil 40 of the electromagnetic clutch 15 will be described. For example, when the current Ic does not flow (the current Ic is less than the threshold value) due to the disconnection of the power supply path to the electromagnetic coil 40, the electromagnetic attraction force (for example, the magnetic circuit M in FIG. 4) is not generated from the electromagnetic coil 40. The door ECU 20 cannot control the disconnection and disconnection of the electromagnetic clutch 15. In such a case, if the current Ic flowing through the electromagnetic coil 40 is detected, the abnormality of the electromagnetic clutch 15 can be determined. However, if an abnormality (failure) occurs in the portion of the electromagnetic clutch 15 excluding the electromagnetic coil 40 (the mechanically disconnected portion of the electromagnetic clutch 15), that is, the portion on the armature 41 and the rotor 42 side, the electromagnetic clutch 15 Abnormality cannot be detected. For example, even when the electromagnetic coil 40 generates an electromagnetic attraction force due to the presence of a foreign substance between the armature 41 and the rotor 42, the electromagnetic clutch is not pressed against the armature 41 and the rotor 42. There are times when 15 is not in the connected state. In such a case, it is determined that the electromagnetic clutch 15 does not have an abnormality because the current Ic flowing through the electromagnetic coil 40 is equal to or greater than the threshold value even though the electromagnetic clutch 15 has an abnormality. It ends up. As described above, there was a case where the abnormality of the electromagnetic clutch 15 could not be detected even though the abnormality occurred in the electromagnetic clutch 15.

On the other hand, in the present embodiment, the electromagnetic clutch 15 is based on whether or not the motor 11 rotates when the slide door 2 is fixed by the latch mechanism 4 and the electromagnetic clutch 15 is in the connected state. Abnormality is detected. At this time, in the situation where the slide door 2 is fixed by the latch mechanism 4, the movement of the slide door 2 in the front-rear direction is restricted. Then, when the electromagnetic clutch 15 is actually in the connected state, the rotation of the motor 11 which is the drive source is transmitted to the slide door 2 which is the drive target. Therefore, the driving force generated by the motor 11 should act on the slide door 2 to move the vehicle in the front-rear direction. However, since the slide door 2 is fixed by the latch mechanism 4, even if a force for moving the slide door 2 in the front-rear direction of the vehicle acts due to the driving force of the motor 11, the slide door 2 can be moved in the front-rear direction. As a result, the number of pulses P does not exceed the threshold value P0 because the motor 11 does not rotate. That is, when the slide door 2 is fixed by the latch mechanism 4 and the electromagnetic clutch 15 is in the connected state, if no abnormality has occurred in the electromagnetic clutch 15, even if the motor 11 is to be rotated, the motor 11 is used. Does not rotate, and the number of pulses P becomes less than the threshold value P0.

Further, when the slide door 2 is fixed by the latch mechanism 4 and the electromagnetic clutch 15 is in the connected state, if the pulse number P becomes the threshold value P0 or more, the electromagnetic clutch 15 is abnormal. it is conceivable that. This is because if the sliding door 2 is fixed by the latch mechanism 4 and the electromagnetic clutch 15 is in the connected state, the motor 11 does not rotate.

For example, if an electromagnetic attraction force is not generated due to an abnormality in the electromagnetic coil 40, the armature 41 and the rotor 42 are not pressed against each other, so that the electromagnetic clutch 15 is not connected. Since the electromagnetic clutch 15 is not connected, even if the slide door 2 is fixed by the latch mechanism 4, the rotation of the motor 11 is not regulated, so that the pulse number P becomes the threshold value P0 or more. Therefore, the door ECU 20 can detect an abnormality in the electromagnetic clutch 15 based on whether or not the number of pulses P is equal to or greater than the threshold value P0.

Further, for example, due to the presence of a foreign substance between the armature 41 and the rotor 42, the armature 41 and the rotor 42 are not pressure-welded (or the pressure contact is sufficient) even though the electromagnetic coil 40 generates an electromagnetic attraction force. Even in this case, the abnormality of the electromagnetic clutch 15 can be detected. If the armature 41 and the rotor 42 are not pressure-welded, the electromagnetic clutch 15 is not in the connected state. Therefore, even if the slide door 2 is fixed by the latch mechanism 4 and the electromagnetic clutch 15 is in the connected state, the motor 11 rotates. Resulting in. Then, if the motor 11 rotates, the number of pulses P is considered to be equal to or higher than the threshold value P0. Therefore, the door ECU 20 can detect an abnormality in the electromagnetic clutch 15 when the number of pulses P is equal to or greater than the threshold value P0.

As described above, conventionally, when an abnormality occurs in the portion of the electromagnetic clutch 15 on the electromagnetic coil 40 side, the abnormality of the electromagnetic clutch 15 is detected, but in the present embodiment, not only the portion of the electromagnetic clutch 15 on the electromagnetic coil 40 side but also the portion of the electromagnetic clutch 15 on the electromagnetic coil 40 side is detected. The abnormality of the electromagnetic clutch 15 can be detected even when an abnormality occurs in the parts of the electromagnetic clutch 15 on the armature 41 and the rotor 42 side. Therefore, the range in which the abnormality of the electromagnetic clutch 15 can be detected is expanded, so that the abnormality of the electromagnetic clutch 15 can be detected more reliably.

(2) Conventionally, an abnormality in the electromagnetic clutch 15 has been detected based on whether or not the current Ic flowing through the electromagnetic coil 40 in the electromagnetic clutch 15 is equal to or greater than a threshold value. Therefore, it is necessary to newly provide a current detection circuit for detecting the current Ic.

In this regard, in the present embodiment, the abnormality of the electromagnetic clutch 15 is detected by using each component (electromagnetic clutch 15, motor 11, latch mechanism 4, pulse sensor 14, etc.) already provided in the vehicle. Can be done. Since it is not necessary to provide a new configuration for detecting the abnormality of the electromagnetic clutch 15, the number of parts of the power slide door device 1 can be reduced.

(3) The door ECU 20 detects an abnormality in the electromagnetic clutch 15 based on whether or not the number of pulses P is equal to or greater than the threshold value P0. For example, even when the slide door 2 is fixed by the latch mechanism 4 and the electromagnetic clutch 15 is in the connected state, a pulse may be generated to an extent corresponding to the play of the speed reduction mechanism 12. However, since the threshold value P0 is set in consideration of the play of the deceleration mechanism 12, it is not determined that the abnormality of the electromagnetic clutch 15 is erroneously generated. Therefore, the abnormality of the electromagnetic clutch 15 can be detected more reliably.

(4) For example, when the motor 11 is rotated at the maximum output, even if the electromagnetic clutch 15 does not have an abnormality, the pressure contact between the armature 41 and the rotor 42 may be released, or the latch may occur. There is a risk that the holding force of the sliding door 2 by the mechanism 4 will be exceeded. If the pressure contact between the armature 41 and the rotor 42 is released or the holding force of the slide door 2 by the latch mechanism 4 is exceeded, the motor 11 will rotate, so that the pulse number P becomes the threshold value P0 or more. It is thought that it will end up. Then, the door ECU 20 erroneously detects an abnormality in the electromagnetic clutch 15 based on the fact that the number of pulses P is equal to or greater than the threshold value P0, even though no abnormality has actually occurred in the electromagnetic clutch 15. .. In this respect, in the present embodiment, the amount of energization to the motor 11 is set to such an extent that the pressure contact between the armature 41 and the rotor 42 is not released by the rotation of the motor 11 based on the amount of energization, so that the electromagnetic wave is erroneously electromagnetically generated. Since the abnormality of the clutch 15 is not detected, the abnormality of the electromagnetic clutch 15 can be detected more reliably.

The present embodiment may be modified as follows. In addition, the following other embodiments can be combined with each other to the extent that they are technically consistent.
In the present embodiment, the wave washer 51 is used as the urging member to bring the armature 41 into contact with the rotor 42, but the urging member may be arbitrarily changed. Further, a configuration that does not use an urging member may be applied.

-In this embodiment, the neutral lock 5d is provided, but it is not necessary to provide the neutral lock 5d.
-At the time of determining the abnormality of the electromagnetic clutch 15, the slide door 2 is fixed by the latch mechanism 4, but the present invention is not limited to this. A new configuration for fixing the sliding door 2 may be provided. For example, the sliding door 2 may be restricted from moving in one direction. That is, it is sufficient that the slide door 2 does not move in the direction in which the motor 11 rotates.

In the present embodiment, the door ECU 20 detects an abnormality in the electromagnetic clutch 15 based on whether or not the number of pulses P detected by the pulse sensor 14 is equal to or greater than the threshold value P0, but the present invention is not limited to this. For example, the present invention is not limited to the pulse sensor 14, and may be a rotation angle sensor that detects the rotation angle of the rotation axis of the motor 11. That is, it may be a rotation detection unit that detects whether or not the motor 11 is rotating. In this case, the door ECU 20 detects the abnormality of the electromagnetic clutch 15 based on whether or not the motor 11 is rotated by the rotation detection unit.

-In the present embodiment, the door actuator 10 is used for the power slide door device 1, but it may be applied to an actuator device used for other purposes. For example, it may be applied to a back door, a luggage door, or another opening / closing body control device for opening / closing an opening / closing body such as a trunk provided at the rear of the vehicle. Further, the application is not limited to the opening / closing body control device that opens / closes the opening / closing body, and may be applied to other vehicle control devices that control the mechanism via the electromagnetic clutch 15.

1 ... Power slide door device, 2 ... Slide door (opening and closing body), 3 ... Door handle, 3a ... Operation unit, 4 ... Latch mechanism, 5 ... Lock device, 5a ... Front lock, 5b ... Rear lock, 5c ... Fully open lock 5, 5d ... Neutral lock, 6 ... Remote control, 10 ... Door actuator, 11 ... Motor, 12 ... Deceleration mechanism, 13 ... Open / close body drive unit (Open / close body drive device), 14 ... Pulse sensor (rotation detection unit), 15 ... Electromagnetic Clutch, 16 ... Magnetic detection element, 20 ... Door ECU (open / close body control device, control unit), 21 ... Operation input unit, 22 ... Sensor switch, 22a ... Half latch switch, 22b ... Full latch switch, 22c ... Pole switch, 30 ... In-vehicle power supply, 40 ... Electromagnetic coil, 41 ... Amerture, 42 ... Rotor, 43 ... Worm gear, 44 ... Wheel gear, 45 ... Output shaft, 46, 47 ... Ball bearing, 48 ... Sliding bearing, 49 ... Yoke, 50 ... Screw member, 51 ... wave washer, 52 ... magnet, 60 ... accommodating member, 60a ... motor housing, 60b ... clutch case, 61 ... opening, M ... magnetic circuit, P ... number of pulses, P0 ... threshold, V ... moving speed , X ... movement position, Ic ... current, S1 ... operation input signal, S2 ... lock control signal, Sp ... pulse signal, Vb ... power supply signal, Sw1 to Sw3 ... output signal.

Claims (5)

In an opening / closing body control device including a control unit for controlling an opening / closing body driving device that opens / closes an opening / closing body of a vehicle.
The opening / closing body driving device includes a motor that generates a driving force for opening / closing the opening / closing body, an electromagnetic clutch that connects and disconnects a driving force transmission path between the motor and the opening / closing body, and the opening / closing body at a predetermined position. It is provided with a locking device for holding, an opening / closing operation detecting unit for detecting an opening / closing operation for opening / closing the opening / closing body, and a rotation detecting unit for detecting the rotation of the motor.
As an abnormality detection process of the electromagnetic clutch, the control unit connects the transmission path of the driving force by controlling the electromagnetic clutch while the opening / closing body is held by the lock device, and the motor. An opening / closing body control device that detects an abnormality in the electromagnetic clutch based on the fact that the rotation detecting unit detects that the motor is rotating when a driving force for opening / closing the opening / closing body is generated. In the opening / closing body control device according to claim 1,
As the rotation detection unit, a pulse sensor for detecting a pulse generated in response to the rotation of the motor is provided.
When the number of the pulses detected by the pulse sensor is equal to or greater than the threshold value, the control unit detects the abnormality of the electromagnetic clutch as if the rotation detection unit has detected that the motor is rotating. Opening and closing body control device. In the opening / closing body control device according to claim 2.
The threshold is set when the electromagnetic clutch is not abnormal and the opening / closing body is held by the locking device, and when the driving force transmission path is connected by controlling the electromagnetic clutch. An opening / closing body control device that is determined in consideration of the amount of play of the opening / closing body driving device due to the driving force generated by the motor and the rotation of the motor. In the opening / closing body control device according to any one of claims 1 to 3.
When the opening / closing body is held by the locking device, when the motor generates a driving force for opening / closing the opening / closing body, the motor does not exceed the force for holding the opening / closing body by the locking device. Opening and closing body control device that generates the driving force of. In the opening / closing body control device according to any one of claims 1 to 4.
The lock device is an opening / closing body control device that is a latch mechanism.

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