JP6681321B2 - Mating type engagement device - Google Patents

Description

  The present invention relates to a meshing engagement device applied to a transmission or the like as a clutch or a brake.

For example, as an engagement device applied to a transmission or the like, a meshing engagement device also known as a so-called dog clutch or tooth clutch is known (see Patent Document 1).
In this meshing type engagement device, meshing teeth are formed on the respective facing surfaces of a pair of meshing engaging elements (simply referred to as “engaging elements”) so that the pair of engaging elements approach each other and the respective meshing teeth mesh with each other. Are engaged with each other, the pair of engaging elements are separated from each other, and the respective meshing teeth are disengaged from each other to be released.

  Such a mesh-type engagement device is configured to perform switching between engagement and disengagement between two members by controlling a current to a coil (electromagnet) (hereinafter, referred to as “mesh-type electromagnetic mechanism”). It is also known as a "combining device").

  In this meshing type electromagnetic engagement device, for example, a return spring (release force application member) for applying a force in a direction of releasing (releasing) the mutual engagement is provided between a pair of engagement elements, and both engagement elements are provided. A coil and a permanent magnet are provided on the outer circumference of the coupling element. When these engaging elements are engaged from the released state, the coil is energized to generate a magnetic field, and the electromagnetic force is used to approach both the engaging elements against the return spring to engage them. Further, when releasing both engaging elements from the engaged state, a magnetic field is generated in the coil in the direction opposite to that at the time of engaging, and the electromagnetic force in the opposite direction is used to separate and release both engaging elements.

  In such a meshing type electromagnetic engagement device, when switching both engagement elements between the disengaged state and the completely engaged state, it is possible to appropriately grasp the positional relationship between both engagement elements in performing switching control. You will need it. The positional relationship between the two engaging elements in this case means that the tips (tooth tips) of the convex portions (tooth portions) of the two engaging elements are in contact with each other between the completely released state and the completely engaged state. There is a contact state.

  For example, when switching from release to engagement, unless the rotation phases of the concave portions (grooves) and the convex portions (tooth portions) of both engaging elements match, the tooth tip contact state where the tooth tips of both engaging elements are in contact with each other. In some cases, the two engaging elements cannot be engaged as they are. The state in which engagement is not possible in this tooth tip contact state occurs because the rotational torque of the drive-side member of both engagement elements is insufficient. Therefore, in such tooth tip contact state, both engaging elements are controlled by increasing the rotational torque. The elements can be engaged. Therefore, if it is possible to grasp that the tooth tips are in contact with each other, the engagement control can be appropriately performed.

JP, 2016-017539, A

  By the way, in order to properly grasp the positional relationship between the two engaging elements, for example, a sensor capable of linearly detecting the axial position of the other engaging element with respect to one engaging element is used. It is possible to provide it.

  However, a sensor that can detect linearly has a complicated mechanism, and in the case of a meshing type electromagnetic engagement mechanism, it is necessary to consider providing it at a position that is not affected by electromagnetic force, so the position can be detected linearly. When the sensor is provided, there are problems that the entire meshing engagement device becomes large and layout is restricted.

  The present invention has been made in view of the above problems, and it is possible to suppress the increase in size of the meshing engagement device without using a linear sensor, and both engagement elements are fully engaged, tip contact, completely released. It is an object of the present invention to provide a meshing type engagement device capable of appropriately grasping which state of the above.

  (1) In order to achieve the above object, the meshing engagement device of the present invention has meshing teeth, the meshing teeth are arranged so as to be meshable with each other, and are rotatably supported by respective support members. The first and second meshing engagement elements that are axially supported, the coils, the permanent magnets and the yokes provided on the outer circumferences of the first and second meshing engagement elements, and the first and second meshes. Disengagement force imparting means for imparting a disengagement force for operating the engagement element to the disengagement side between the first and second meshing engagement elements and the first and second meshing by controlling energization to the coil. By manipulating a magnetic field passing through the engagement element, magnetic force is used to axially move the first mating engagement element to fully disengage and fully engage the first and second mating engagement elements. And an engagement control means for switching control between the first and second engagement engagements. As a relative positional relationship of, the complete release position in which the tooth tips of the meshing teeth are separated from each other, the complete engagement position in which the meshing teeth are completely meshed, and the intermediate position between the complete release position and the complete engagement position. A meshing type engagement device having a position and a tooth tip contact position where each tooth tip of the meshing tooth is in contact with each other, and the complete release position of the first and second meshing engagement elements. An ON / OFF type position sensor that switches ON / OFF of a signal between the tooth tip contact position, a current sensor that detects a current value of the coil, and the first and second meshing engagement elements from the completely released position. When switching to the full engagement position, if the on / off signal of the position sensor is switched, it is determined that the position has moved to the tooth tip contact position, and if the current value detected by the current sensor indicates a drop, the full engagement position To It determines that the movement is characterized by having a position determining means.

  (2) The engagement control means causes the first and second meshing engagement elements to approach each other when switching the first and second meshing engagement elements from the complete release position to the complete engagement position. To the coil when the position determining means determines that the first and second meshing engagement elements have moved to the complete engagement position. It is preferable to instruct the stop of the current supply.

  (3) When the first and second meshing engagement elements are switched from the complete release position to the complete engagement position, a magnetic force is generated on the side closer to the first and second meshing engagement elements. Even if the engagement control means instructs the coil to supply a current as described above, the position determination means does not determine that the first and second meshing engagement elements have moved to the complete engagement position. It is preferable to include a failure determination means for determining that the engagement is impossible.

  (4) The position determination means, when switching the first and second meshing engagement elements from the full engagement position to the full release position, moves to the full release position when the ON / OFF signal of the position sensor switches. It is preferable to determine that it has been done.

  (5) The engagement control means separates the first and second meshing engagement elements from each other when switching the first and second meshing engagement elements from the complete engagement position to the complete release position. To the coil so as to generate a magnetic force to the side, and when the position determining means determines that the first and second meshing engagement elements have moved to the completely released position, the coil is supplied to the coil. It is preferable to stop the current supply.

  (6) When switching the first and second meshing engagement elements from the complete engagement position to the complete release position, a magnetic force is generated on the side separating the first and second meshing engagement elements from each other. Even if the engagement control means instructs the coil to supply a current, when the position determination means does not determine that the first and second meshing engagement elements have moved to the complete release position, It is preferable to include a failure determination means for determining the unreleasable failure.

  (7) It is preferable that the position determination means determines that the current value has moved from the tooth tip contact position to the complete engagement position when the current value shows a drop of a preset decrease amount or more.

  (8) The support member that supports the coil, the permanent magnet, and the yoke is configured to rotate in the complete engagement position and not rotate in the complete release position, and the position sensor is fixed to the support member. A sensor support body, an off state in which the first meshing engagement element is in contact with the sensor support body so that the first meshing engagement element is in contact with the sensor support body, and an on state in which the first meshing engagement element is not in contact. It is preferable that the sensor has a tip end detection unit, and a bearing device is attached to the tip end detection unit.

  According to the present invention, when the first and second meshing engagement elements are switched from the completely disengaged position to the completely engaged position, the position determination means determines from the ON / OFF signal of the position sensor and the current value of the coil by the current sensor, Since it is determined that it has moved to the tip contact position and the full engagement position, it is possible to properly detect the full engagement position, the tip contact position, or the full release position without using a linear sensor. Upsizing can be suppressed.

  Further, the failure determination means generates a magnetic force on the side that brings the first and second meshing engagement elements closer to each other when switching the first and second meshing engagement elements from the completely released position to the completely engaged position. Even if the coil is instructed to supply the current as described above, if it is not determined that the first and second meshing engagement elements have moved to the complete engagement position, it is determined that the engagement cannot be performed. It is possible to reliably detect the impossible failure in a short time.

  Further, when the first and second meshing engagement elements are switched from the completely engaged position to the completely released position, the position determination means determines from the ON / OFF signal of the position sensor that the position sensor has moved to the completely released position. It is possible to properly detect the transition from the completely engaged position to the completely disengaged position without using, and it is possible to suppress the increase in size of the device.

  Further, the failure determination means generates a magnetic force on the side separating the first and second meshing engagement elements when switching the first and second meshing engagement elements from the complete engagement position to the complete release position. Even if the coil is instructed to supply a current as described above, if it is not determined that the first and second meshing engagement elements have moved to the completely released position, it is determined that the failure cannot be released. It can be detected reliably in a short time.

  Further, if the bearing device is mounted on the first meshing engagement element and the tip detection portion of the position sensor with which the first meshing engagement element abuts, the position sensor and the first meshing engagement element are The relative rotation can be performed without any hindrance, friction at the time of contact of the tip detection unit can be reduced, and the durability of the position sensor can be ensured.

FIG. 1 is a vertical sectional view (upper half portion) and a side view (lower half portion) of a meshing type engagement device according to an embodiment of the present invention. FIG. 6 is a longitudinal sectional view of an essential part for explaining the operation of the axial movement mechanism 20 of the meshing engagement device according to the embodiment of the present invention, in which (a) shows a magnetic field state held in a completely released position, and (b). Shows a magnetic field state in which the magnetic field is moved from the completely released position to the fully engaged position, (c) shows a magnetic field state in which the fully engaged position is held, and (d) shows a magnetic field state in which the magnetic field is moved from the completely engaged position to the completely released position. Indicates. It is a side view which shows the position sensor of the meshing type engagement device which concerns on one Embodiment of this invention, (a) shows the ON state of a position sensor, (b) shows the OFF state of a position sensor. It is a schematic diagram explaining the switching operation | movement from the complete release position to the complete engagement position of the meshing type engagement device which concerns on one Embodiment of this invention, (a) is a schematic diagram which shows the state of a complete release position, ( FIG. 6B is a schematic diagram showing a state of a tooth tip contact position, and FIG. 8C is a schematic diagram showing a state of a complete engagement position. It is a schematic diagram explaining the switching operation | movement from the complete engagement position of the meshing type engagement device which concerns on one Embodiment of this invention to a complete release position, (a) is a schematic diagram which shows the state of a complete engagement position, (B) is a schematic diagram showing the state of the releasing process, and (c) is a schematic diagram showing the state of the completely released position. 7 is a flowchart illustrating a switching operation from a completely released position to a completely engaged position of the meshing engagement device according to the embodiment of the present invention. 6 is a flowchart illustrating a switching operation from a completely engaged position to a completely released position of the meshing engagement device according to the embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
Note that the embodiments described below are merely examples, and there is no intention to exclude various modifications and application of techniques that are not explicitly shown in the following embodiments. The configurations of the following embodiments can be variously modified and implemented without departing from the spirit thereof, and can be appropriately selected or combined as needed.

〔Device configuration〕
As shown in FIG. 1, an input shaft 1 connected to a drive source (not shown) (a motor in this case), and a rotation shaft (not shown) provided on the same shaft center (rotating shaft center line O ₁ ) as the input shaft 1. The element is provided with an output gear 2 having gear teeth 2a for outputting a rotational force. The output gear 2 is rotatably arranged on the outer periphery of the input shaft 1 via bearings 3a and 3b. The main meshing engagement device (also referred to as a clutch) 10 is interposed between the input shaft 1 and the output gear 2 as described above.

  In this embodiment, the rotating element that outputs the rotational force of the output gear 2 is a part of the drive train of the vehicle. That is, in the hybrid vehicle having the engine (internal combustion engine) (not shown) and the motor (electric motor) (not shown) as drive sources, the meshing engagement device 10 is drive-coupled when the motor is used as a drive source of the vehicle, It shall be used to release the drive connection when the motor is not used as the drive source of the vehicle.

The meshing engagement device 10 includes a first armature (first meshing engagement element) 11 that integrally rotates with the input shaft 1 and a second armature (second meshing engagement element) that integrally rotates with the output gear 2. ) 12 and. Each of the first and second armatures 11 and 12 is formed in a disk shape using a magnetic material, and is concentrically arranged adjacent to each other on the rotation axis O ₁ . The first armature 11 is axially movable with respect to the input shaft 1 by spline coupling or the like, and is connected so as to rotate integrally. The second armature 12 is coupled to the output gear 2 with a bolt or the like so as to rotate integrally.

  On the surfaces of the first and second armatures 11 and 12 that face each other (here, near the outer periphery of the facing surfaces), meshing teeth 11a and 12a that can mesh with each other are formed. According to the axial position of the first armature 11, the first and second armatures 11 and 12 are separated from each other by the meshing teeth 11a and 12a, and the engagement is completely released (hereinafter referred to as a fully released state). , Simply referred to as a released state), a tooth tip contact state in which the tooth tips of the meshing teeth 11a and 12a are in contact with each other, and a completely engaged state in which the meshing teeth 11a and 12a are completely meshed (hereinafter , Simply referred to as a fastening state).

  The first armature 11 includes a completely released position (hereinafter, also simply referred to as a released position) that brings the armatures 11 and 12 into a released state, a tooth tip contact position that brings the armatures 11 and 12 into a tooth tip contact state, and the armature 11 , 12 are engaged with each other in a fully engaged position (hereinafter, also simply referred to as a engaged position) to be appropriately driven in the axial direction.

  An axial movement mechanism 20 is provided for axially moving the first armature 11. The axial movement mechanism 20 is provided with a coil 21 and a permanent magnet 22 that are provided in the immediate vicinity of the outer circumferences of the first and second armatures 11 and 12, and a direction that separates the first armature 11 from the second armature 12. And a spring (release force applying means) 23 for applying a releasing force for releasing the first and second armatures 11 and 12 to each other between the armatures 11 and 12 by urging the armatures 11 and 12.

  A yoke 24 made of a magnetic material is provided around the coil 21 and the permanent magnet 22. The yoke 24 is supported by the support member 25 together with the coil 21 and the permanent magnet 22, and is provided on the outer circumference of the first and second armatures 11 and 12.

The support member 25 is made of a magnetic material, is rotatably supported on the outer circumference of the input shaft 1 via bearings 4a and 4b, and has a cylindrical base portion 25a extending along the axis O _{1 of} rotation, and from the base portion 25a. outer flange-like portion 25b extended in the (radial direction), and a cylindrical yoke support portion 25c extending along the outer edge of the flange portion 25b in the rotation axial line O _1.

The yoke 24 includes a first yoke 24a and a second yoke 24b that are provided so as to be separated from each other in the axial direction (direction of the rotation axis O ₁ ) so as to sandwich the coil 21, and the first yoke 24a and the second yoke 24b. The inside of the facing portion of is extended so as to partially surround the coil 21 from the inner peripheral side. The permanent magnet 22 is arranged between the second yoke 24b and the yoke support portion 25c on the outer side. As a result, the yoke 24 and the support member 25 are used to form a magnetic field penetrating the first and second armatures 11 and 12.

  This magnetic field is formed according to the positions of the armatures 11 and 12 and the energization state of the coil 21. For example, as shown in FIG. 2A, when the coil 21 is not energized in a released state where the tooth tips of the meshing teeth 11a and 12a of the armatures 11 and 12 are separated from each other, the magnetic flux line by the permanent magnet 22 (see black arrow A1). Is formed. In response to the magnetic flux lines, the first armature 11 is magnetically attracted to the flange-shaped portion 25b of the support member 25, and the released state is maintained.

  Here, when the coil 21 is energized to form the magnetic flux line indicated by the two-dot chain line arrow A2 in FIG. 2A, the magnetic force generated by the coil 21 causes the armatures 11 and 12 to come close to each other. , The releasing force of the spring 23 and the magnetic force corresponding to the magnetic flux line of the permanent magnet 22 are overcome, the tooth tips of the meshing teeth 11a and 12a of the armatures 11 and 12 are magnetically attracted, and the armature 11 is moved from the release position to the fastening position. Is driven to the side of.

  During this process, when the armature 11 moves from the released position to the tooth tip contact position, the magnetic flux lines indicated by the black arrow A1 in FIG. 2A disappear due to the separation between the armature 11 and the flange-shaped portion 25b, and FIG. ), A magnetic flux line surrounding the coil 21 is formed by the permanent magnet 22 in the illustrated direction (opposite to the release position), and the magnetic force by the permanent magnet 22 is generated between the armatures 11 and 12. To work closer to the side. That is, both the magnetic force generated by the magnetic flux lines formed by the coil 21 (see white arrow A4) and the magnetic force generated by the magnetic flux lines formed by the permanent magnet 22 (see black arrow A3) drive the armatures 11 and 12 to the fastening position. Acting as an engaging force.

  Then, when the armature 11 is at the tip contact position and the relative phase of the armatures 11 and 12 is adjusted to a position where the meshing teeth 11a and 12a mesh with each other, the armature 11 receives the releasing force of the spring 23 due to the above-mentioned engaging force. It overcomes and is driven to the fastening position.

  At this fastening position, even if the power supply to the coil 21 is stopped, the magnetic force that brings the armatures 11 and 12 closer to each other by the permanent magnet 22 is released by the permanent magnet 22 as shown by a black arrow A5 in FIG. To hold the armature 11 in the fastening position. Therefore, the armatures 11 and 12 can be held in the fastened state without energizing the coil 21.

  On the other hand, in order to drive the first armature 11 at the fastening position to the release side, the coil 21 is energized in the opposite direction so that the magnetic flux line (see the white arrow A6) is generated as shown in FIG. Then, a magnetic force (see the magnetic flux line indicated by the black arrow A6) that becomes the releasing force of the armatures 11 and 12 is generated. The magnetic force (release force) that separates the armatures 11 and 12 formed by the coil 21 cooperates with the release force of the spring 23 to overcome the magnetic force (engagement force) of the permanent magnet 22 to cause the armatures 11 and 12 to move. To act, the first armature 11 is driven from the fastening position towards the release position.

  By the way, this device is equipped with a control device 30. The control device 30 includes a position determination unit (position determination unit) 31 that determines the position of the first armature 11 (a relative position between the armatures 11 and 12) and a coil 21 based on the determination result of the position determination unit 31. An engagement control unit (engagement control means) 32 that controls energization to the armature 11 and controls switching of the first and second armatures 11 and 12 between release and fastening, and first and second switching control. And a failure determination section (failure determination means) 33 for determining a failure of the meshing engagement device 10 from the responses of the armatures 11 and 12. A computer including a memory (ROM, RAM) and a CPU is applied to the control device 30.

The position determination unit 31 determines the position of the first armature 11 based on the detection information of the position sensor 41 and the detection information of the current sensor 42.
The position sensor 41 is an on / off type position sensor in which the on / off of the signal is switched between the released position of the first armature 11 and the tooth tip contact position. As shown in FIG. 3A, the position sensor 41 is supported by the sensor support 41a fixed to the flange-like portion 25b of the support member 25 and the sensor support 41a so as to be able to move forward and backward, and the first armature. It has a detection body 41b having a tip detection unit 41c that is in an off state in which 11 is in contact and in an on state in which the first armature 11 is not in contact.

  The detection body 41b is projected from the sensor support body 41a by receiving an elastic force [see an arrow in FIG. 3B], and something comes into contact with the tip detection unit 41c of the detection body 41b to receive a contact pressure. Then, the detection body 41b elastically retracts. Then, in a state in which the detection body 41b is most protruded from the sensor support body 41a without making any contact with the tip detection portion 41c of the detection body 41b [see FIG. 3 (a)], the position sensor 41 is turned on and the detection body 41b The position sensor 41 is turned off when something touches the tip detection unit 41c and the detection body 41b is slightly retracted to the sensor support 41a side (see the arrow in FIG. 3A). The signal of the position sensor 41 is set to be switched on and off between the released position of the first armature 11 and the tooth tip contact position.

In the present embodiment, the bearing device 43 is attached to the tip detection unit 41c.
A thrust needle bearing is applied to the bearing device 43, and a large number of radial members are held between a sensor-side washer 43a and an armature-side washer 43b by a holder (not shown) and are radially provided with respect to the rotation axis O ₁ . A needle bearing 43c is provided. The sensor-side washer 43a is coupled to the tip detection unit 41c that can move back and forth in parallel with the rotation axis O _1, and is supported by the base 25a via a structure such as a spline so that it can move forward and backward integrally with the tip detection unit 41c. Has been done.

  When the first armature 11 is at the fastening position or the tooth tip contact position, nothing comes into contact with the tip detection unit 41c, so the position sensor 41 outputs an ON signal. Then, since the first armature 11 comes into contact with the tip detection unit 41c in the process in which the first armature 11 moves from the tooth tip contact position to the release position, the output of the position sensor 41 turns off from the ON signal. The signal is switched [see the release position shown in FIG. 3 (b)].

  When the first armature 11 comes into contact with the tip detection unit 41c, the first armature 11 normally rotates relative to the support member 25 to which the position sensor 41 is fixed. The sliding contact with the first armature 11 causes friction resulting in wear of the tip detection unit 41c, but the bearing device 43 can reduce friction, suppress wear of the tip detection unit 41c, and improve durability. Is improved.

Regarding the position of the first armature 11, the position sensor 41 can determine the release position and the fastening position or the tooth tip contact position, but cannot determine the fastening position and the tooth tip contact position. Therefore, focusing on the current flowing through the coil 21, the fastening position and the tooth tip contact position are separated. That is, when the first armature 11 moves to the fastening position, the current flowing through the coil 21 (that is, the current value detected by the current sensor 42) drops for a moment (that is, shows a drop).
Using this characteristic, the position determination unit 31 determines the position of the first armature 11.

  When switching the first armature 11 from the release position to the fastening position, the position determination unit 31 determines that the first armature 11 has moved to the tooth tip contact position if the signal of the position sensor 41 switches from off to on, After that, when the current value detected by the current sensor 42 shows a drop, it is determined that the first armature 11 has moved to the fastening position. At this time, the position determination unit 31 indicates that the current value has dropped when the current value decreases from the maximum value (peak value) by a preset decrease amount or more.

  In addition, the position determination unit 31 does not generate a tooth tip contact position when switching the first armature 11 from the fastening position to the release position, and thus the first armature is not until the signal of the position sensor 41 switches from on to off. It is determined that 11 is in the fastening position, and when the signal of the position sensor 41 is switched from on to off, the first armature 11 is determined to have moved to the release position.

  In the present embodiment, the first armature 11 is switched from the disengaged position to the fastening position by changing the vehicle from the engine alone traveling with only the engine as a drive source to the motor alone traveling with the motor as a drive source or hybrid traveling. This is the case when switching to. Therefore, at this time, the engagement control unit 32 first issues a command to the motor control device 50 to start the stopped motor to increase the rotation speed (also referred to as “rotation speed”), and the first The rotation speed of the armature 11 is brought close to the rotation speed of the second armature 12 connected to the drive train side, and then the energization of the coil 21 is controlled to move the first armature 11 from the release position to the fastening position side. To move.

  At this time, when the first armature 11 moves from the release position to the fastening position side, the relative phase of the first and second armatures 11 and 12 is set to the first position unless the meshing teeth 11a and 12a mesh with each other. The armature 11 is at the tip contact position. Therefore, when the position determination unit 31 determines that the first armature 11 has moved to the tooth tip contact position, the engagement control unit 32 issues a command to the motor control device 50 to increase the torque of the motor, By rotating the first armature 11 relative to the second armature 12, the meshing teeth 11a and 12a are brought into a relative phase position where they mesh with each other. As a result, the magnetic force of the coil 21 moves the first armature 11 to the fastening position. When the position determination unit 31 determines that the first armature 11 has moved to the fastening position, the engagement control unit 32 ends the energization of the coil 21.

  On the other hand, in the present embodiment, the first armature 11 is switched from the fastening position to the release position by changing the vehicle from a single motor drive using a motor as a drive source or a hybrid drive to a single engine drive using only an engine as a drive source. This is the case when switching to. Therefore, at this time, the engagement control unit 32 first issues a command to the motor control device 50 to set the torque of the motor to 0, control the energization of the coil 21, and move the first armature 11 from the fastening position. Move to the release position side.

  When the torque of the motor is set to 0, the meshing frictional force between the meshing teeth 11a and 12a of the first and second armatures 11 and 12 is reduced, so that the release force of the magnetic force of the coil 21 and the release force of the spring 23 cause The armature 11 of 1 easily moves from the fastening position to the release position. When the position determination unit 31 determines that the first armature 11 has moved from the fastening position to the release position, the engagement control unit 32 issues a command to the motor control device 50 to stop the motor (power is not supplied). At the same time, the energization of the coil 21 is terminated.

The failure determination unit 33 determines the failure of the meshing engagement device 10 from the response of the first armature 11 during the switching control of the position of the first armature 11 as described above.
That is, the failure determination unit 33, when switching the first armature 11 from the release position to the fastening position, the engagement control unit 32 so that the magnetic force is generated on the side where the first and second armatures 11 and 12 approach each other. If the position determination unit 31 does not determine that the first armature 11 has moved to the fastening position within a preset predetermined time even when the coil 21 instructs the coil 21 to supply current, it is an unengageable failure. To determine.

  In addition, the failure determination unit 33 causes the engagement control unit 32 to generate a magnetic force on the side separating the first and second armatures 11 and 12 when the first armature 11 is switched from the fastening position to the release position. If the position determination unit 31 does not determine that the first armature 11 has moved to the release position within the preset predetermined time even when the coil 21 instructs the coil 21 to supply the current, the unreleasable failure is determined. judge. However, in this embodiment, if the meshing teeth 11a and 12a are tightly meshed with each other, the meshing of the meshing teeth 11a and 12a may not be released even if the motor 21 is controlled with 0 torque and a release current is input to the coil 21. Assuming this, if it is not determined that the motor has moved to the release position within the predetermined time, the 0 torque control of the motor is stopped and the control for increasing the motor torque to the drive side is performed. If it is not determined that the release position has been reached, it is determined that the release is impossible.

  Since the meshing type engagement device according to the embodiment of the present invention is configured as described above, for example, as shown in the schematic diagrams of FIGS. 4 and 5 and the flowcharts of FIGS. The engagement states of the second armatures 11 and 12 are switched.

For example, when switching from single-engine running to single-motor running using a motor as a drive source or hybrid running, the first armature 11 is switched from the release position to the fastening position. At this time, the coil 21 and the motor are controlled as shown in FIGS.
In this case, first, as shown in FIG. 4A, the first armature 11 is initially in the released position, and the tip detection unit 41 c of the position sensor 41 is connected to the first armature 11 via the bearing device 43. The output signal is in a state of 0 (= off) after being abutted and pushed.

  In order to switch the first armature 11 from the release position to the fastening position, as shown in FIG. 6, the rotation speed of the first armature 11 is connected to the drive train side while the motor is started to increase the rotation speed. The rotation speed of the second armature 12 is brought close to (step A10). Then, it is determined whether or not the difference α between the output rotation speed (the rotation speed of the second armature 12) and the motor rotation speed (the rotation speed of the first armature 11) is less than a preset predetermined value P. (Step A20).

  The meshing teeth 11a of the first and second armatures 11 and 12 are in a state where the difference α between the output rotation speed (the rotation speed of the second armature 12) and the motor rotation speed (the rotation speed of the first armature 11) is large. , 12a may increase the wear of the meshing teeth 11a, 12a and may cause the generation of abnormal noise. From this point of view, the allowable value of the difference α when the meshing teeth 11a, 12a come in contact is The predetermined value P is set. By bringing the meshing teeth 11a and 12a into contact with each other after the difference α becomes less than the predetermined value P, wear of the meshing teeth 11a and 12a and generation of abnormal noise are also suppressed.

  Until it is determined in step A20 that the difference α is less than the predetermined value P, the process proceeds to step A10 in the next control cycle to increase the motor rotation speed. When it is determined in step A20 that the difference α is less than the predetermined value P, the timer is turned on to start timer counting (step A30), and the fastening current is input to the coil 21 (step A40). Then, it is determined whether the signal of the position sensor 41 is switched from 0 (= off) to 1 (= on) (step A50).

  If the signal from the position sensor 41 is not 1, the process proceeds to step A110, and it is determined whether the timer count value t is larger than the determination reference value t0. The determination reference value t0 is a value for determining a non-engageable failure. If the meshing engagement device 10 is not broken down, if the fastening current is input to the coil 21 and the movement toward the engagement side is started, the first and second armatures 11 and 12 are normally fastened within a predetermined time. The state becomes a state, and naturally, before that, the signal of the position sensor 41 switches from 0 to 1. The judgment reference value t0 corresponds to this predetermined time.

  If the timer count value t is within the determination reference value t0, the process proceeds to step A50 in the next control cycle to determine whether the signal from the position sensor 41 is 1. If the meshing engagement device 10 has not failed, the signal from the position sensor 41 becomes 1 before the timer count value t becomes larger than the determination reference value t0. In this case, the process proceeds to step A60, and it is determined from the current value whether the first and second armatures 11 and 12 are in the engaged state. That is, it is determined whether or not the current value detected by the current sensor 42 shows a drop, and if the current value shows a drop, it is determined that the first and second armatures 11 and 12 are in the engaged state.

  If the current value does not indicate the engagement state of the first and second armatures 11 and 12, the process proceeds to step A62, and it is determined whether the timer count value t is larger than the determination reference value t0. It is determined whether the timer count value t is larger than the determination reference value t0. If the timer count value t is within the judgment reference value t0, the routine proceeds to step A70, where the motor torque is increased.

  As shown in FIG. 4B, when the first and second armatures 11 and 12 are not in the tightened state, the first and second armatures 11 and 12 are in the tooth tip contact state and the first and second armatures are in contact with each other. It can be assumed that the meshing teeth 11a and 12a of the armatures 11 and 12 are rotating at a constant speed in a state in which the phases are shifted, and the increase in the motor torque causes a difference between the first and second armatures 11 and 12. Differential rotation can be given to match the phases of the meshing teeth 11a and 12a. Thereby, the first armature 11 is moved by the fastening force due to the magnetic force of the coil 21, and the meshing teeth 11a and 12a are meshed with each other, so that the first and second armatures 11 and 12 can be brought into the fastening state. If the timer count value t is within the determination reference value t0, the motor torque is increased every control cycle until the first and second armatures 11 and 12 are in the engaged state.

  As a result, the current value starts to show a drop, the affirmative determination is made in step A60, the process proceeds to step A80, and the first and second armatures 11 and 12 are in the engaged state as shown in FIG. 4 (c). It is determined that Next, proceeding to step A90, the fastening current of the coil 21 is turned off. Then, the traveling mode of the vehicle is set to the motor traveling mode or the hybrid traveling mode (step A100), the timer is turned off, the timer value is reset to 0 (step A150), and the switching control of the meshing engagement device 10 is completed.

  On the other hand, when it is determined in step A110 or step A62 that the timer count value t is larger than the determination reference value t0, the meshing engagement device 10 cannot engage (the clutch is released when the clutch is released). It is determined to be a failure (step A120). In this case, the fastening current of the coil 21 is turned off (step A122), the engine running mode is instructed (step A130), and the failure is displayed by a warning light or the like in the vehicle (step A140). Then, the timer is turned off, the timer value is reset to 0 (step A150), and the switching control of the meshing engagement device 10 is completed.

On the other hand, when switching from single motor driving or hybrid driving using a motor as a drive source to single engine driving, the first armature 11 is switched from the fastening position to the release position. At this time, the coil 21 and the motor are controlled as shown in FIGS.
In this case, first, the first armature 11 is in the fastening position as shown in FIG. 5A, and the tip detection unit 41c of the position sensor 41 does not contact the first armature 11 so that the output signal is not generated. Is in the 1 (= on) state.

  In order to switch the first armature 11 from the engagement position to the release position, as shown in FIG. 7, zero torque control for making the torque of the motor zero is executed (step B10). Then, the timer is turned on to start counting the timer (step B20), and the release current is input to the coil 21 (step B30). When the torque of the motor is set to 0, the first armature 11 easily moves from the fastening position to the release position by the release force of the magnetic force of the coil 21 to which the release current is input and the release force of the spring 23.

  Then, it is determined whether or not the signal of the position sensor 41 is switched from 1 to 0 (step B40). When the signal of the position sensor 41 is switched to 0, the process proceeds to step B90, and as shown in FIG. 5C, it is determined that the first and second armatures 11 and 12 are in the released state. Next, the process proceeds to step B100, and the release current of the coil 21 is turned off. Then, the traveling mode of the vehicle is set to the engine traveling mode (step B110), the timer is turned off, the timer value is reset to 0 (step B160), and the switching control of the meshing engagement device 10 is completed.

  On the other hand, if the signal from the position sensor 41 remains 1, the process proceeds from step B40 to step B50 to determine whether the timer count value t is larger than the determination reference value t1. The determination reference value t1 is a value for determining the timing of switching the motor from 0 torque control to control for generating drive-side torque. Normally, the first armature 11 moves from the engagement position to the release position within a predetermined time by the 0 torque control and the input of the release current, and the signal of the position sensor 41 switches from 1 to 0. Accordingly, the determination reference value t1 is set.

  If the meshing teeth 11a, 12a are tightly meshed with each other, as shown in FIG. 5B, the meshing of the meshing teeth 11a, 12a will not be released even if the motor is controlled to 0 torque and the release current is input to the coil 21. In this case, in this case, it may be possible to release the meshing of the meshing teeth 11a and 12a by generating a motor torque on the drive side. Therefore, if the signal of the position sensor 41 remains 1 even if the timer count value t becomes larger than the determination reference value t1, the 0 torque control of the motor is stopped (step B60), and the motor torque is set to the drive side. The control to increase is performed (step B70).

Then, it is determined whether the motor torque Tm exceeds a preset reference value Tp (step B80). As long as the motor torque Tm does not exceed the reference value Tp, the process proceeds to step B40 in the next control cycle, and it is determined whether the signal from the position sensor 41 has switched from 1 to 0.
When the signal of the position sensor 41 switches from 1 to 0, the process proceeds to step B90, it is determined that the first and second armatures 11 and 12 are in the released state, and the same process as above is performed (steps B90 and B100). , B160).

  If the signal from the position sensor 41 remains 1, the process proceeds from step B40 to steps B50 and B60 and then to step B70 to perform control to increase the motor torque to the drive side. Then, when it is determined in step B80 that the motor torque Tm exceeds the preset reference value Tp, it is determined that the meshing engagement device 10 has a disengageable failure (clutch engagement failure in which the clutch is in an engaged state). (Step B120).

  Then, control is performed to limit the motor rotational speed Nm to less than the upper limit rotational speed Nms (step B130), the coil release current is turned off (step B140), and the vehicle traveling mode remains in the motor traveling mode or the hybrid traveling mode. It is held (step B150), the timer is turned off, the timer value is reset to 0 (step B160), and the switching control of the meshing engagement device 10 is completed.

  As described above, according to the present meshing type engagement device, when switching from the disengagement position to the engagement position by using the on-off type position sensor 41 and the current sensor 42, the engagement position is changed to the tooth tip contact position and the disengagement position. When the movement of is switched from the fastening position to the release position, the transition from the fastening position to the release position can be appropriately detected without using a linear sensor, and the enlargement of the device can be suppressed.

  Further, the failure determination unit 33 determines, based on the responses of the position sensor 41 and the current sensor 42, an unengageable failure when switching from the release position to the fastening position, and an unreleasable failure when switching from the fastening position to the release position. Therefore, it is possible to reliably detect the engagement failure and the release failure in a short time.

  Since the bearing device 43 is attached to the tip detection unit 41c of the position sensor 41, the position sensor 41 and the first armature 11 rotate relative to each other without any hindrance, and friction when contacting the armature 11 of the tip detection unit 41c is prevented. It can be reduced and the durability of the position sensor 41 is ensured.

[Other]
Although the embodiment of the present invention has been described above, the present invention can be implemented by appropriately modifying the embodiment.
For example, in the above-described embodiment, the bearing device 43 is attached to the tip detection unit 41c of the position sensor 41, but it may be omitted if the tip detection unit 41c and the first armature 11 slide smoothly. .

  Further, the axial movement mechanism 20 may be equipped with a coil, a permanent magnet and a yoke, and may be any one that moves the first armature 11 in the axial direction by controlling the energization of the coil and operating the magnetic field, The present invention is not limited to this embodiment.

  Further, in the present embodiment, the main meshing engagement device is applied to a portion where the motor is connected or not connected to the drive train of the hybrid vehicle, but the main meshing engagement device is applicable without being limited thereto. .

1 input shaft 2 output gear 10 meshing type engagement device (clutch)
11 First armature (first mating engagement element)
11a Interlocking teeth of the first armature 11 12 Second armature (second interlocking engagement element)
12a Meshing teeth of the second armature 12 20 Axial movement mechanism 21 Coil 22 Permanent magnet 23 Spring (release force applying means)
24, 24a, 24b yoke 25 support member 30 control device 31 position determination unit (position determination means)
32 Engagement control section (engagement control means)
33 Failure determination unit (failure determination means)
41 position sensor 41a sensor support 41b detector 41c tip detector 42 current sensor 43 bearing device

Claims (8)

First and second meshing engagement elements that respectively have meshing teeth, the meshing teeth are arranged so as to be meshable with each other, and are rotatably supported by the support member, respectively.
A coil, a permanent magnet and a yoke mounted on the outer circumference of the first and second meshing engagement elements,
Release force applying means for applying a release force for operating the first and second meshing engagement elements to the release side between the first and second meshing engagement elements,
By controlling the energization of the coil to operate the magnetic field penetrating the first and second meshing engagement elements, the magnetic force is used to axially move the first meshing engagement element. Engagement control means for controlling switching between the first engagement and the second engagement engagement element between complete release and complete engagement,
As a relative positional relationship between the first and second meshing engagement elements, a complete release position in which the tips of the meshing teeth are separated from each other, a complete engagement position in which the meshing teeth are completely meshed, and the complete An interlocking engagement device having an intermediate position between a release position and the complete engagement position, and a tooth tip contact position where each tooth tip of the meshing tooth abuts,
An on-off type position sensor that switches on and off of a signal between the complete release position of the first and second meshing engagement elements and the tooth tip contact position,
A current sensor for detecting the current value of the coil,
When the first and second meshing engagement elements are switched from the completely released position to the completely engaged position, it is determined that the tooth tip contact position has been moved when the on / off signal of the position sensor is switched, and the current A meshing engagement device, comprising position determining means for determining that the current value detected by the sensor has moved to the complete engagement position when the current value shows a drop. The engagement control means, when switching the first and second meshing engagement elements from the complete release position to the complete engagement position, magnetic force is applied to a side that brings the first and second meshing engagement elements closer to each other. When the position determining means determines that the first and second meshing engagement elements have moved to the completely engaged position, the coil is supplied with current so that the current is supplied to the coil. 2. The meshing type engagement device according to claim 1, wherein the meshing engagement device is instructed to stop. When switching the first and second meshing engagement elements from the complete release position to the complete engagement position, the magnetic force is generated on the side where the first and second meshing engagement elements approach each other. Even if the engagement control means instructs the coil to supply current, if the position determination means does not determine that the first and second meshing engagement elements have moved to the complete engagement position, the engagement is performed. The meshing engagement device according to claim 2, further comprising a failure determination unit that determines that the engagement failure is impossible. When switching the first and second meshing engagement elements from the completely engaged position to the completely released position, the position determination means determines that the position sensor has moved to the fully released position when the on / off signal of the position sensor switches. The meshing type engagement device according to any one of claims 1 to 3, characterized in that. The engagement control means, when switching the first and second meshing engagement elements from the complete engagement position to the complete disengagement position, applies magnetic force to the side separating the first and second meshing engagement elements from each other. To instruct the coil to supply current, and when the position determining means determines that the first and second meshing engagement elements have moved to the completely disengaged position, supplies current to the coil. The meshing engagement device according to claim 4, wherein the meshing engagement device is stopped. The magnetic force is generated on the side separating the first and second meshing engagement elements when the first and second meshing engagement elements are switched from the complete engagement position to the complete release position. Even if the engagement control means instructs the coil to supply a current, if the position determination means does not determine that the first and second meshing engagement elements have moved to the completely released position, the release failure is impossible. The meshing engagement device according to claim 5, further comprising a failure determination means for determining that 7. The position determining means determines that the current value has moved from the tooth tip contact position to the complete engagement position when the current value shows a drop of a preset reduction amount or more. The meshing engagement device according to any one of 1. A support member that supports the coil, the permanent magnet, and the yoke is configured to rotate in the complete engagement position and non-rotatable in the complete release position,
The position sensor is
A sensor support fixed to the support member;
The sensor support is supported so as to be able to move forward and backward, and has a tip detection unit that is in an off state in which the first meshing engagement element is in contact and in an on state in which the first meshing engagement element is not in contact. And a detection body,
The meshing engagement device according to any one of claims 1 to 7, wherein a bearing device is attached to the tip detection part.

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