WO2014115248A1 - 係合装置 - Google Patents
係合装置 Download PDFInfo
- Publication number
- WO2014115248A1 WO2014115248A1 PCT/JP2013/051212 JP2013051212W WO2014115248A1 WO 2014115248 A1 WO2014115248 A1 WO 2014115248A1 JP 2013051212 W JP2013051212 W JP 2013051212W WO 2014115248 A1 WO2014115248 A1 WO 2014115248A1
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- WIPO (PCT)
- Prior art keywords
- piece
- tooth
- sleeve
- engagement
- teeth
- Prior art date
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D63/00—Brakes not otherwise provided for; Brakes combining more than one of the types of groups F16D49/00 - F16D61/00
- F16D63/006—Positive locking brakes
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D11/00—Clutches in which the members have interengaging parts
- F16D11/08—Clutches in which the members have interengaging parts actuated by moving a non-rotating part axially
- F16D11/10—Clutches in which the members have interengaging parts actuated by moving a non-rotating part axially with clutching members movable only axially
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D48/00—External control of clutches
- F16D48/06—Control by electric or electronic means, e.g. of fluid pressure
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
- B60K6/20—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
- B60K6/22—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs
- B60K6/38—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs characterised by the driveline clutches
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D11/00—Clutches in which the members have interengaging parts
- F16D2011/008—Clutches in which the members have interengaging parts characterised by the form of the teeth forming the inter-engaging parts; Details of shape or structure of these teeth
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2500/00—External control of clutches by electric or electronic means
- F16D2500/30—Signal inputs
- F16D2500/304—Signal inputs from the clutch
- F16D2500/3041—Signal inputs from the clutch from the input shaft
- F16D2500/30415—Speed of the input shaft
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2500/00—External control of clutches by electric or electronic means
- F16D2500/50—Problem to be solved by the control system
- F16D2500/502—Relating the clutch
- F16D2500/50287—Torque control
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2500/00—External control of clutches by electric or electronic means
- F16D2500/50—Problem to be solved by the control system
- F16D2500/506—Relating the transmission
- F16D2500/50607—Facilitating engagement of a dog clutches, e.g. preventing of gear butting
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2500/00—External control of clutches by electric or electronic means
- F16D2500/70—Details about the implementation of the control system
- F16D2500/704—Output parameters from the control unit; Target parameters to be controlled
- F16D2500/70402—Actuator parameters
- F16D2500/7041—Position
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2500/00—External control of clutches by electric or electronic means
- F16D2500/70—Details about the implementation of the control system
- F16D2500/704—Output parameters from the control unit; Target parameters to be controlled
- F16D2500/70422—Clutch parameters
- F16D2500/70424—Outputting a clutch engaged-disengaged signal
Definitions
- the present invention relates to an engagement device.
- Patent Document 1 discloses a meshing device in which an inclined surface is provided between an end surface on the side facing the other gear and a tooth surface in the tooth portions of the drive gear and the driven gear. It is disclosed.
- the inclined surface of the drive gear is formed on the rear side with respect to the rotation direction of the drive gear, while the inclined surface of the driven gear is formed on the front side with respect to the rotation direction.
- the inclined surface of the driven gear is brought into contact with the inclined surface of the drive gear, and the inclined surface of the driven gear is moved to the drive gear side along the inclined surface of the drive gear.
- the driven gear can be reliably meshed with the drive gear.
- the present invention has been made in view of the above, and an object of the present invention is to provide an engagement device that can reliably engage and improve durability.
- an engagement device includes a first member having engaged teeth, a second member arranged coaxially with the first member and having engaging teeth, A rotating means for relatively rotating around the axis between the first member and the second member; a moving means for relatively moving in the axial direction between the first member and the second member; the rotating means; Control means for controlling the operation of the moving means, and a plurality of the engaged teeth are formed on the side of the first member facing the second member along the circumferential direction around the axis, A plurality of engaging teeth are formed along the circumferential direction around the axis on the side of the second member facing the first member, and the engaged teeth and the engaging teeth are in the circumferential direction.
- the front edge end portion of one first tooth surface is disposed on the inner side in the axial direction from the front edge end portion of the other second tooth surface, and is viewed from the first member side.
- the front edge end portion of one first tooth surface is disposed on the inner side in the axial direction from the front edge end portion of the other second tooth surface,
- the engaged teeth and the engaging teeth are formed so that a width in the circumferential direction on opposite sides in the axial direction is reduced, and the first tooth surface of the engaged teeth and the engaging teeth
- the first tooth surfaces of the engaged teeth are arranged so as to face each other and approach each other when the first member rotates relative to the second member in a negative rotation direction
- the second tooth of the engaged tooth The tooth surface and the second tooth surface of the engaging tooth are arranged so as to face each other when the first member rotates relative to the second member in the positive rotation direction.
- the control means rotates in the negative rotation direction relative to the second member.
- the moving means is controlled to relatively move in a direction in which the first member and the second member approach each other, and further, a predetermined movement condition relating to the relative movement between the first member and the second member is satisfied. Later, the rotation means is controlled so that the relative rotation speed of the first member with respect to the second member is changed from negative to 0 or more.
- the control unit determines that the movement condition is satisfied. Is preferred.
- control means further moves the first member and the second member relative to each other while changing the relative rotational speed from negative to 0 or more. It is preferable to control the moving means.
- the engaged teeth of the first member are arranged to face the second member at a position closest to the second member in the axial direction, An engaged tooth side connection surface that connects an end surface and the first tooth surface of the engaged tooth, and the engaging tooth of the second member is connected to the first member in the axial direction. It is preferable to have an end face disposed opposite to the first member at the nearest position, and an engagement tooth side connection face that connects between the end face and the first tooth face of the engagement tooth. .
- the engaged tooth side connection surface and the engagement tooth side connection surface are tapered surfaces.
- control means sets the relative rotational speed when the relative rotational speed becomes a predetermined value or more in the positive rotational direction after the relative rotational speed is changed from negative to 0 or more. It is preferable to control the rotation means so as to decrease the rotation means.
- the first member is supported to be rotatable about a rotation axis
- the second member is supported to be movable along an axial direction
- the rotation means includes the first member. Rotating about the axis, the moving means moves the second member in the axial direction, and the control means engages the first member with the first member.
- the second member is controlled so that the second member moves in a direction approaching the first member in a state in which the first member rotates in the negative rotation direction. It is preferable to control the rotation means so that the rotation number of the rotation is from negative to 0 or more.
- the engagement device according to the present invention has an effect that the engagement can be surely performed and the durability can be improved.
- FIG. 1 is a diagram showing a schematic configuration of a hybrid vehicle drive device to which an engagement device according to a first embodiment of the present invention is applied.
- FIG. 2 is an enlarged schematic view of a main part of the engagement device in FIG.
- FIG. 3 is a flowchart of the engagement control process performed by the engagement device of the first embodiment.
- FIG. 4 is a time chart of the engagement control process performed by the engagement device of the first embodiment.
- FIG. 5 is a schematic diagram showing the transition of the positional relationship between the sleeve and the piece when the dog teeth of the sleeve enter between the teeth without contacting the dog teeth of the piece in the engaging operation.
- FIG. 1 is a diagram showing a schematic configuration of a hybrid vehicle drive device to which an engagement device according to a first embodiment of the present invention is applied.
- FIG. 2 is an enlarged schematic view of a main part of the engagement device in FIG.
- FIG. 3 is a flowchart of the engagement control process performed by the engagement device of the first
- FIG. 6 is a schematic diagram showing the transition of the positional relationship between the sleeve and the piece when the dog teeth of the sleeve enter between the teeth without contacting the dog teeth of the piece in the engaging operation.
- FIG. 7 is a schematic diagram showing the transition of the positional relationship between the sleeve and the piece when the large tapered surface of the dog teeth of the sleeve collides with the large tapered surface of the dog teeth of the piece in the engaging operation.
- FIG. 8 is a schematic diagram showing the transition of the positional relationship between the sleeve and the piece when the large tapered surface of the dog teeth of the sleeve collides with the large tapered surface of the dog teeth of the piece in the engaging operation.
- FIG. 9 is a schematic diagram showing the transition of the positional relationship between the sleeve and the piece when the end surface of the dog tooth of the sleeve collides with the end surface of the dog tooth of the piece in the engaging operation.
- FIG. 10 is a schematic diagram showing the transition of the positional relationship between the sleeve and the piece when the end surface of the dog tooth of the sleeve collides with the end surface of the dog tooth of the piece in the engaging operation.
- FIG. 11 is a flowchart of an engagement control process performed by the engagement device of the second embodiment.
- FIG. 12 is a time chart of the engagement control process performed by the engagement device of the second embodiment.
- FIG. 13 is an enlarged schematic view of the main part of the engaging device according to the third embodiment of the present invention.
- FIG. 14 is a schematic diagram illustrating a state in which the sleeve approaches the piece in the engaging operation performed by the engaging device according to the third embodiment.
- FIG. 15 is a schematic view showing a state in which the large taper surface of the sleeve collides with the large taper surface of the piece in the engaging operation performed by the engaging device of the third embodiment.
- FIG. 16 is a schematic diagram illustrating a state when the movement control of the sleeve is completed in the engagement operation performed by the engagement device of the third embodiment.
- FIG. 17 is a schematic diagram illustrating a state in which the rotation direction of the piece is reversed by torque change control in the engagement operation performed by the engagement device of the third embodiment.
- FIG. 18 is a schematic view showing a state where the dog teeth of the sleeve mesh with the dog teeth of the piece in the engaging operation performed by the engaging device of the third embodiment.
- FIG. 1 is a diagram showing a schematic configuration of a hybrid vehicle drive device to which an engagement device according to a first embodiment of the present invention is applied
- FIG. 2 is an enlarged view of a main part of the engagement device in FIG. It is the schematic diagram seen.
- the hybrid vehicle 100 drives the drive wheels 5 to rotate and propels the engine 2 as a drive source, and a first motor generator MG1 and a second motor generator MG2 that are electric motors capable of generating electricity.
- the engagement device 1 of the present embodiment is incorporated into a hybrid vehicle drive device 10 for transmitting power from these drive sources to the drive wheels 5, for example.
- the hybrid vehicle drive device 10 includes an engine 2, a first motor generator MG 1, a second motor generator MG 2, a power distribution mechanism 3, a speed reduction mechanism 4, drive wheels 5, and an ECU (Electronic Control Unit: electronic control unit) 6.
- Engine 2 is an internal combustion engine that outputs power by combustion of hydrocarbon fuel such as gasoline or light oil.
- the engine 2 is subjected to operation control such as fuel injection control, ignition control, and intake air amount adjustment control by the ECU 6 to which signals are input from various sensors that detect the operation state of the engine 2.
- the first motor generator MG1 and the second motor generator MG2 function as a motor (power running function) that outputs motor torque with supplied power, and function as a generator that converts input mechanical power into power ( It is a well-known AC synchronous generator motor that also has a regenerative function.
- the first motor generator MG1 is mainly used as a generator, while the second motor generator MG2 is mainly used as an electric motor.
- First motor generator MG1 and second motor generator MG2 exchange power with the battery via an inverter (not shown).
- the power running control as the electric motor or the regenerative control as the generator of the first motor generator MG1 and the second motor generator MG2 is controlled by the ECU 6.
- the engine 2 and the first motor generator MG1 are connected to a pair of drive wheels 5 via a power distribution mechanism 3 and a speed reduction mechanism 4, and the second motor generator MG2 is connected to a pair of drive wheels 5 via a speed reduction mechanism 4.
- the power distribution mechanism 3 divides the engine torque output from the engine 2 into the first motor generator MG1 and the drive wheels 5.
- the power distribution mechanism 3 includes, for example, a planetary gear unit.
- the engine torque output from the engine 2 or the motor torque output from the second motor generator MG2 is transmitted to the pair of drive wheels 5 via the power distribution mechanism 3 and the speed reduction mechanism 4. Further, when the first motor generator MG1 functions as a generator, the first motor generator MG1 regenerates electric power using the engine torque distributed and supplied by the power distribution mechanism 3.
- the power distribution mechanism 3 is used as a continuously variable transmission by causing the first motor generator MG1 to function as a generator and performing regenerative control. That is, the output of the engine 2 is transmitted to the drive wheels 5 after being shifted by the power distribution mechanism 3.
- the control of the engine speed of the engine 2 and the output control to the drive wheels 5 are performed by controlling the drive of the second motor generator MG2 or the speed of the first motor generator MG1 or the second motor generator MG2. be able to.
- FIG. 1 is connected to the first motor generator MG1 as shown in FIG. Engagement device 1 is configured to be capable of regulating the rotation of first motor generator MG1, and is used as an MG1 lock mechanism that mechanically locks the rotation of first motor generator MG1.
- the engagement device when the engine speed control by the power distribution mechanism 3 and the output control to the drive wheels 5 are executed, the engagement device is required when the speed of the first motor generator MG1 needs to be controlled to zero. 1 mechanically locks the rotation of the first motor generator MG1. For this reason, it is not necessary to electrically control the rotation speed of the first motor generator MG1, so that it is not necessary to supply power to the first motor generator MG1, and fuel consumption can be improved.
- the engagement device 1 mechanically locks the rotation of the first motor generator MG1, the power distribution mechanism 3 does not function as a continuously variable transmission and becomes a fixed stage.
- the engagement device 1 includes a piece 7 (first member), a sleeve 8 (second member), an actuator 9 (moving means), a first motor generator MG1 (rotating means), and an ECU 6 (control means). .
- the piece 7 is connected to the rotating shaft 13 of the first motor generator MG1 and is installed to be rotatable around the rotating shaft 13 in conjunction with the rotating shaft 13.
- the piece 7 is, for example, a disk member, is connected to the rotation shaft 13 at the approximate center of the disk, and is configured to rotate around the rotation shaft 13 by driving the first motor generator MG1. 1 and 2, the moving direction of the piece 7 is shown as a “rotating direction”. The piece 7 is restricted from moving in the radial direction of the rotary shaft 13.
- the sleeve 8 is a disk member similar to the piece 7, and is disposed on the same axis as the piece 7 so as to face the piece 7.
- the sleeve 8 moves along the axial direction of the rotary shaft 13 in a direction approaching the piece 7 (hereinafter also referred to as “engagement direction” or “approach direction”) or in a direction away from the piece 7 (hereinafter “release direction”).
- engagement direction or “approach direction”
- release direction are also movably arranged. 1 and 2
- the moving direction (engagement direction and release direction) of the sleeve 8 is collectively shown as a “stroke direction”.
- the sleeve 8 is fixed to the case, for example, and is restricted from moving in a direction other than the stroke direction.
- the actuator 9 can apply a driving force in the stroke direction to the sleeve 8 in accordance with a control command from the ECU 6.
- the sleeve 8 can move in the stroke direction when thrust is applied by the actuator 9 (hereinafter also referred to as “stroke operation”).
- the actuator 9 has a so-called ratchet function that idles when it receives a reaction force. In the situation where the sleeve 8 cannot move in the engagement direction due to the reaction force, for example, when the dog tooth 12 of the sleeve 8 collides with the dog tooth 11 of the piece 7 during the stroke operation of the sleeve 8.
- the position of the sleeve 8 in the stroke direction can be maintained or retracted by the ratchet function.
- the relative positional relationship in the approaching direction from the sleeve 8 to the piece 7 can be changed by driving the actuator 9 in accordance with a control command from the ECU 6 and moving the sleeve 8 in the stroke direction. Further, by driving the first motor generator MG1 in accordance with a control command from the ECU 6 and rotating the piece 7, the relative positional relationship between the piece 7 and the sleeve 8 in the rotation direction around the rotation shaft 13 is obtained. Can change.
- the piece 7 and the sleeve 8 are disposed so as to be coaxially opposed to each other, that is, the opposed surfaces 7a and 8a, which are one surface of each disk, are arranged to face each other.
- a plurality of dog teeth 11 (engaged teeth) are arranged in a circle along the circumferential direction at a predetermined radial position from the center (rotation center) of the opposing surface 7a. ing.
- Each of the plurality of dog teeth 11 protrudes from the facing surface 7a toward the sleeve 8 along the axial direction of the rotating shaft 13 (the direction in which the sleeve 8 and the piece 7 approach each other).
- the dog tooth 11 has a pair of tooth surfaces 11a and 11b extending in the approach direction and facing each other in the circumferential direction (rotation direction).
- the tooth surface on the right side of the drawing is shown as a tooth surface 11a (first tooth surface)
- the tooth surface on the left side is shown as a tooth surface 11b (second tooth surface).
- a plurality of dog teeth 12 are circularly arranged along the circumferential direction at a predetermined radial position from the center of the opposing surface 8a.
- Each of the plurality of dog teeth 12 protrudes from the facing surface 8a toward the piece 7 along the axial direction of the rotating shaft 13 (the direction in which the sleeve 8 and the piece 7 approach each other).
- the dog tooth 12 has a pair of tooth surfaces 12a and 12b extending in the approaching direction and opposed in the circumferential direction.
- the tooth surface on the left side of the drawing is shown as a tooth surface 12a (first tooth surface), and the tooth surface on the right side is shown as a tooth surface 12b (second tooth surface). That is, the tooth surface 12a of the dog tooth 12 of the sleeve 8 is a surface opposite to the tooth surface 11a of the dog tooth 11 of the piece 7 in the rotational direction.
- the dog teeth 12 of the sleeve 8 are arranged on the facing surface 8 a so that they can enter between the dog teeth 11 of the piece 7 when the sleeve 8 approaches the piece 7.
- the tooth surface 11a of the dog tooth 11 of the piece 7 and the tooth surface 12a of the dog tooth 12 of the sleeve 8 are arranged so as to face each other when the piece 7 rotates in one direction with respect to the sleeve 8.
- the tooth surface 11b of the dog tooth 11 of the piece 7 and the tooth surface 12b of the dog tooth 12 of the sleeve 8 are mutually connected when the piece 7 rotates with respect to the sleeve 8 in the direction opposite to the above one direction. Arranged to face each other.
- the direction in which the tooth surface 11 a of the dog tooth 11 of the piece 7 approaches the tooth surface 12 a of the dog tooth 12 of the sleeve 8 is expressed as a “negative rotation direction”.
- the direction in which the tooth surface 11b of the dog tooth 11 of the piece 7 and the tooth surface 12b of the dog tooth 12 of the sleeve 8 approach each other is expressed as a “forward rotation direction”. That is, in FIGS. 1 and 2, the left direction in the figure is the positive rotation direction of the piece 7, and the right direction is the negative rotation direction.
- dog teeth 11 and 12 are meshing dog clutches.
- the sleeve 8 moves in a direction approaching the piece 7 (engagement direction), and the dog teeth 12 of the sleeve 8 are closely combined with the dog teeth 11 of the piece 7 and mesh with each other.
- the piece 7 can be engaged.
- the sleeve 8 moves in a direction away from the piece 7 (release direction), and the dog teeth 12 of the sleeve 8 are separated from the dog teeth 11 of the piece 7 so that the engagement state between the sleeve 8 and the piece 7 is released. Can be made.
- Each of the plurality of dog teeth 11 of the piece 7 has an end face 11d that is arranged to face the sleeve 8 at a position closest to the sleeve 8 in the axial direction.
- Each of the plurality of dog teeth 11 of the piece 7 is formed with a large taper surface 11c (non-engaging tooth side connection surface) on the end surface 11d side of the tooth surface 11a.
- the large tapered surface 11 c is formed on the sleeve 8 side of the tooth surface 11 a of the dog tooth 11.
- the large tapered surface 11c connects the end surface 11d of the dog tooth 11 and the tooth surface 11a.
- each of the plurality of dog teeth 12 of the sleeve 8 has an end face 12d arranged to face the piece 7 at a position closest to the piece 7 in the axial direction.
- Each of the plurality of dog teeth 12 of the sleeve 8 is also formed with a large taper surface 12c (engagement tooth side connection surface) on the end surface 12d side of the tooth surface 12a.
- the large tapered surface 12 c is formed on the piece 7 side of the tooth surface 12 a of the dog tooth 12.
- the large taper surface 12c connects the end surface 12d of the dog tooth 12 and the tooth surface 12a.
- the large tapered surfaces 11c and 12c have one end connected to the vicinity of the center of the end surfaces 11d and 12d, and the other end 1 on the tooth base side (the side away from the piece 7 or the sleeve 8) of the tooth surfaces 11a and 12a. It is connected at a position of about / 4.
- the positions of the end portions of these large tapered surfaces 11c and 12c can be arbitrarily selected.
- the taper angles of the large taper surfaces 11c and 12c are substantially the same, and it is preferable that the two taper surfaces 11c and 12c are formed so as to be in surface contact with each other.
- the large taper surface 11c of the dog tooth 11 of the piece 7 and the large taper surface 12c of the dog tooth 12 of the sleeve 8 are formed when the sleeve 8 approaches the piece 7 or when the sleeve 8 approaches the tooth surface 11a of the piece 7 and the tooth surface of the sleeve 8.
- approaching 12a they are opposed to each other, and preferably formed so that at least a part thereof can abut. That is, the large tapered surface 12 c of the dog tooth 12 of the sleeve 8 is formed on the opposite side of the rotational direction from the large tapered surface 11 c of the dog tooth 11 of the piece 7.
- the large taper surface 11c of the piece 7 is formed on the tooth surface 11a in the right direction in the figure
- the large taper surface 12c of the sleeve 8 is formed on the tooth surface 12a in the left direction in the figure.
- the dog teeth 11 and 12 are endless when viewed in a cross-sectional shape along the circumferential direction around the rotation shaft 13 (that is, the shape shown in FIGS. 1 and 2). From the part, the shape becomes asymmetrical along the direction of the tooth root (stroke direction). That is, as shown in FIG. 2, when viewed from the sleeve 8 side, the front edge end portion 11e of the tooth surface 11a of the piece 7 is arranged on the far side in the axial direction from the front edge end portion 11f of the tooth surface 11b.
- the large tapered surface 11c is disposed in front of the tooth surface 11a.
- the front edge end portion 12e of the tooth surface 12a of the sleeve 8 is disposed on the back side in the axial direction from the front edge end portion 12f of the tooth surface 12b, and the large taper surface 12c is the tooth surface 12a. It is arranged in front of. In other words, the boundary positions between the large tapered surfaces 11c and 12c and the tooth surfaces 11a and 12a (that is, the front edge ends 11e and 12e) overlap with the tooth surfaces 11b and 12b when viewed from the circumferential direction.
- the areas of the tooth surfaces 11a and 12a are smaller than the areas of the tooth surfaces 11b and 12b.
- the tooth surfaces 11a and 12a having a smaller area are also referred to as “small tooth surfaces”
- the tooth surfaces 11b and 12b having a larger area are referred to as “ Also referred to as “large tooth surface”.
- the lengths of the small tooth surfaces 11a and 12a from the end surfaces 11d and 12d side to the tooth base side are shorter than those of the large tooth surfaces 11b and 12b.
- the large tooth surfaces 11b and 12b having a large area among the pair of tooth surfaces are used as meshing surfaces that mesh with each other at the time of engagement.
- chamfering is also performed on the end surfaces 11d and 12d side of the large tooth surfaces 11b and 12b used as the meshing surfaces to form tapered surfaces, but they are connected to the small tooth surfaces 11a and 12a.
- the large taper surfaces 11c and 12c are provided to facilitate the dog teeth 12 of the sleeve 8 to enter between the dog teeth 11 of the piece 7, and have a larger area than the taper surfaces connected to the large tooth surfaces 11b and 12b. Is formed to be large.
- the dog teeth 11 and 12 are formed so that the circumferential widths on the sides facing each other in the axial direction are reduced by forming the large tapered surfaces 11c and 12c. That is, when the dog teeth 11 and 12 are viewed in a cross-sectional shape along the circumferential direction around the rotation shaft 13, the circumferential width of the end surfaces 11 d and 12 d is minimized and the piece 7 and the sleeve 8 are moved away from each other. The circumferential width gradually increases.
- the portion on the near side in the axial direction connected to the front edge end portion 11e of the small tooth surface 11a of the piece 7 (that is, the large tapered surface 11c) is located in the circumferential direction from the small tooth surface 11a. It is formed so as not to protrude.
- the portion on the near side in the axial direction connected to the front edge end portion 12e of the small tooth surface 12a of the sleeve 8 (that is, the large taper surface 12c) is circumferential in relation to the small tooth surface 12a. It is formed so as not to protrude.
- ECU6 controls operation
- the ECU 6 drives the first motor generator MG1 and the actuator 9 to appropriately change the relative position between the sleeve 8 and the piece 7 of the engagement device 1 and engage the sleeve 8 with the piece 7. Engagement control is performed.
- the ECU 6 controls the sleeve 8 and the piece 7 according to the following procedures (i) to (iii).
- the first motor generator MG1 is driven to perform the rotational speed control in which the piece 7 and the small tooth surfaces 11a and 12a of the sleeve 8 are in contact with each other, that is, the piece 7 is rotated in the negative rotation direction.
- the actuator 9 is driven to approach the piece 7 from the sleeve 8 in the stroke direction. A stroke operation for moving the sleeve 8 closer to the piece 7 is performed.
- Change control is performed, the rotation direction of the piece 7 is changed from the negative direction to the positive direction, and the large tooth surfaces 11 b and 12 b of the piece 7 and the sleeve 8 are engaged with each other.
- the ECU 6 is physically an electronic circuit mainly composed of a known microcomputer including a CPU (Central Processing Unit), a RAM (Random Access Memory), a ROM (Read Only Memory) and an interface.
- the functions of the ECU 6 described above are to load various application programs stored in the ROM into the RAM and execute them by the CPU, thereby operating various devices in the hybrid vehicle 100 under the control of the CPU, and in the RAM and ROM. This is realized by reading and writing data.
- the ECU 6 is not limited to the above functions, and includes other various functions used as the ECU of the hybrid vehicle 100.
- the ECU includes a plurality of ECUs such as an engine ECU that controls the engine 2, a motor ECU that controls the first motor generator MG1 and the second motor generator MG2, and a battery ECU that monitors the battery. Also good.
- FIG. 3 is a flowchart of the engagement control process performed by the engagement device of the first embodiment
- FIG. 4 is a time chart of the engagement control process performed by the engagement device of the first embodiment.
- FIG. 4 shows the number of rotations of the piece 7, and (b) shows the stroke amount of the sleeve 8.
- the rotational speed of the piece 7 is negative rotation below 0, and the small tooth surface 11 a of the dog tooth 11 of the piece 7 rotates in a direction approaching the small tooth surface 12 a of the dog tooth 12 of the sleeve 8. Represents what to do.
- the rotational speed of the piece 7 is a positive rotation above 0, so that the large tooth surface 11 b of the dog tooth 11 of the piece 7 approaches the large tooth surface 12 b of the dog tooth 12 of the sleeve 8. Represents rotating.
- the stroke amount of the sleeve 8 represents that the sleeve 8 moves in the engaging direction and approaches the piece 7 as it moves upward.
- the target rotational speed of the piece 7 is changed to that for engaging operation (step S101).
- the first motor generator MG1 is feedback-controlled to control the rotational speed of the piece 7 (step S102).
- the target rotational speed of the rotational speed control is set in a rotational direction in which the large tooth surfaces 11b and 12b meshing with each other when the piece 7 and the sleeve 8 are engaged do not collide. That is, the target rotational speed is set to the rotational direction in which the small tooth surfaces 11a and 12a on the side where the large tapered surfaces 11c and 12c are provided approaches, that is, the rotational speed in the negative rotational direction.
- the target rotation speed should just be the rotation direction which the large tooth surfaces 11b and 12b do not collide, it can also set 0 rotation which can maintain the distance between the large tooth surfaces 11b and 12b constant. Therefore, the “negative rotation direction” in which the piece 7 is controlled by the rotation speed control includes zero rotation as well as the rotation direction in which the small tooth surfaces 11a and 12a approach.
- the target rotation range is, for example, a predetermined range including the target rotation speed set in step S101, and a range from 0 rotation to a predetermined negative rotation speed is set as shown as “stroke permission regulation range” in FIG. can do.
- the determination condition for transitioning to the target rotation range is, for example, that the piece rotation speed stays within the target rotation range for a certain period of time, and the amount of change in the piece rotation speed that has entered the target rotation range (the piece rotation speed in FIG.
- the ECU 6 determines that the rotation speed of the piece 7 has transitioned within a predetermined target rotation range when these set determination conditions are satisfied.
- step S103 if it is determined that the rotation speed of the piece 7 is not within the predetermined target rotation range (No in step S103), the process returns to step S102, and the rotation speed of the piece continues to be within the target rotation range.
- the rotational speed control is subsequently performed to make the transition.
- step S104 Since the movement control is started when the rotational speed of the piece 7 enters the target rotational range with an allowable width without waiting for the rotational speed of the piece 7 to converge to the target rotational speed, the process can be quickly shifted to the next process. Combined control can be executed quickly.
- the ECU 6 controls the actuator 9 to apply a thrust in the engagement direction to the sleeve 8 to move the sleeve 8 in the engagement direction.
- the target rotation in step S103 At the time t2 when the rotation speed of the piece 7 enters the target rotation range at the time t1 and the state in which the rotation speed is maintained within the target rotation range has elapsed for a predetermined time, the target rotation in step S103. It is determined that the transition has occurred within the range. Then, stroke control in the engagement direction of the sleeve 8 is started at time t2, and the stroke amount of the sleeve 8 gradually increases after time t2. That is, the sleeve 8 is close to the piece 7. At this time, since the rotational speed of the piece 7 is within a target rotational range of 0 to a predetermined negative rotational speed, the piece 7 rotates in the negative rotational direction.
- step S105 it is determined whether or not a predetermined stroke condition relating to the stroke control of the sleeve 8 is completed.
- the stroke condition is a condition for determining that the sleeve 8 can be brought close to the piece 7 by a predetermined stroke amount.
- the stroke condition includes, for example, that a predetermined stroke amount has been moved, and that a time necessary for moving the predetermined stroke amount has elapsed.
- the movement of the predetermined stroke amount can be estimated or detected based on various sensor information such as the movement amount of the sleeve 8 detected by the stroke sensor and the elapsed time from the start of the stroke control.
- the stroke condition includes that the dog tooth 12 of the sleeve 8 collides with the dog tooth 11 of the piece 7. Such a collision is maintained for a certain period of time at a specific value corresponding to, for example, the position where the large taper surfaces 11c and 12c contact each other, the position where the end surfaces 11d and 12d contact each other, or the like. It can be detected in the state.
- step S105 If it is determined that the stroke condition of the sleeve 8 is not completed as a result of the determination in step S105 (No in step S105), the process returns to step S104 and the stroke control of the sleeve 8 is continued.
- the torque change control is a control for changing the drive torque of the piece 7 by adding an additional torque in a feedforward manner to the feedback control amount (torque) of the rotational speed control.
- the rotational direction of the piece 7 is changed from the negative rotational direction in which the small tooth surfaces 11a and 12a on the side where the large tapered surfaces 11c and 12c are provided to the piece 7 and the sleeve 8.
- An additional torque in the positive rotation direction is added so that the tooth surfaces 11b and 12b meshing with each other at the time of engagement gradually change in the positive rotation direction approaching.
- a positive torque is gradually added to the drive torque of the piece 7, so that the rotational speed of the piece 7 is gradually changed from negative to the positive rotation direction.
- the piece 7 rotates in the direction in which the small tooth surface 11a of the piece 7 and the small tooth surface 12a of the sleeve 8 approach each other.
- the rotational speed of the piece 7 becomes a positive rotational speed, and the rotational direction of the piece 7 is reversed in a direction in which the large tooth surface 11b of the piece 7 and the large tooth surface 12b of the sleeve 8 approach each other.
- step S107 it is confirmed whether or not the rotational speed of the piece 7 is equal to or lower than the specified rotational speed.
- the prescribed rotational speed can be set to a predetermined value in the forward rotational direction. That is, in this determination block, it is confirmed that the rotational speed of the piece 7 has been changed to a relatively small rotational speed in the positive rotational direction by torque change control. If it exceeds the specified rotational speed (No in step S107), it is determined that the balance is lost due to the torque sweep, and the rotational speed of the piece 7 has changed too much in the positive rotational direction.
- the additional torque of torque change control is reduced (step S108).
- the amount of reduction of the additional torque may be zero, or may be reduced by a predetermined amount. Thereby, the number of piece rotations that has increased excessively in the forward rotation direction is reduced.
- the process of step S108 is repeated until the number of rotations of the piece stabilizes below the specified number of rotations.
- Step S109 it is determined whether or not the engagement between the dog teeth 12 of the sleeve 8 and the dog teeth 11 of the piece 7 is completed.
- the determination of the completion of engagement is performed by, for example, detecting that the differential rotation between the sleeve 8 and the piece 7 is detected by the rotation speed sensor and the differential rotation is 0, and detecting the amount of movement of the sleeve 8 by the stroke sensor and It is possible to use a well-known method such as that 12 is in a position where it is completely meshed with the dog teeth 11 of the piece 7.
- the process returns to Step S106, and the torque change control is performed again.
- the piece 7 is rotated forward after time t5, the piece 7 is rotated in the direction in which the large tooth surface 11b of the piece 7 and the large tooth surface 12b of the sleeve 8 approach each other, and at time t6. It is determined that the large tooth surface 11b of the piece 7 and the large tooth surface 12b of the sleeve 8 mesh with each other and the engagement between the sleeve 8 and the piece 7 is completed.
- 5 and 6 are schematic diagrams showing transition of the positional relationship between the sleeve and the piece when the dog teeth of the sleeve enter between the teeth without contacting the dog teeth of the piece in the engaging operation.
- 8 is a schematic diagram showing the transition of the positional relationship between the sleeve and the piece when the large taper surface of the dog teeth of the sleeve collides with the large taper surface of the dog teeth of the piece in the engaging operation.
- It is a schematic diagram which shows transition of the positional relationship of a sleeve and a piece when the end surface of the dog tooth of a sleeve collides with the end surface of the dog tooth of a piece in engagement operation
- the following three patterns can be considered for the positional relationship between the sleeve 8 and the piece 7.
- the pattern (1) is indicated by a solid line (indicated as “no collision” in FIG. 4), and the pattern (2) is indicated by an alternate long and short dash line ( In FIG. 4, “taper surface collision” is shown, and the pattern (3) is indicated by a dotted line (in FIG. 4, “end surface collision”).
- no collision in FIG. 4
- end surface collision in FIG. 4, “end surface collision”.
- the dog teeth 12 of the sleeve 8 are denoted by reference numeral 12-2 in FIG. 5 due to the negative rotation of the piece 7 and the thrust in the engagement direction of the sleeve 8. As shown in the figure, it moves closer to the piece 7 while moving in the direction in which the small tooth surface 12a approaches relatively to the piece 7 (leftward in FIG. 5). Then, at time t3 in the time chart of FIG. 4, the dog teeth 12 of the sleeve 8 do not come into contact with the dog teeth 11 of the piece 7 as shown by reference numeral 12-3 in FIG. Enter the gap between the dog teeth 11.
- the dog teeth 12 of the sleeve 8 are relatively moved relative to the piece 7 due to the negative rotation of the piece 7 and the thrust in the engagement direction of the sleeve 8.
- the small tooth surface 12a moves toward the piece 7 while moving in the approaching direction (leftward in FIG. 5).
- the large tapered surface 12 c of the dog tooth 12 of the sleeve 8 collides with the large tapered surface 11 c of the dog tooth 11 of the piece 7.
- the sleeve 8 continues to generate thrust in the engaging direction even after colliding with the large tapered surface 11c of the piece 7. Further, the sleeve 8 receives a pressing force from the piece 7 through the large tapered surface 12 c due to the negative rotation of the piece 7.
- the pressing force received from the piece 7 is larger than the thrust of the sleeve 8 and the frictional force between the large tapered surface 11c and the large tapered surface 12c in contact with each other is smaller than the pressing force
- the dog teeth 12 of the sleeve 8 are used. Is pushed back in the separating direction along the large tapered surface 11c of the piece 7, as indicated by reference numeral 12-6 in FIG. In the time chart of FIG.
- the stroke amount of the sleeve 8 is decreased in the section from time t5 to time t5 after the large taper surfaces 11c and 12c collide after time t2, and the sleeve 8 is pushed back in the separation direction. .
- the dog teeth 12 of the sleeve 8 are relatively moved relative to the piece 7 due to the negative rotation of the piece 7 and the thrust in the engagement direction of the sleeve 8.
- the small tooth surface 12a approaches the piece 7 while moving in the direction in which the small tooth surface 12a approaches (leftward in FIG. 9).
- the end surface 12d of the dog tooth 12 of the sleeve 8 collides with the end surface 11d of the dog tooth 11 of the piece 7 as indicated by reference numeral 12-8.
- the dog teeth 12 of the sleeve 8 are first moved to the piece as shown in FIG. 7 moves in the direction in which the large tooth surface 12b approaches along the end surface 11d of the piece 7 (the right direction in FIG. 10).
- the dog teeth 12 of the sleeve 8 are driven by the forward rotation of the piece 7 and the thrust in the engagement direction of the sleeve 8, as indicated by reference numeral 12-10 in FIG.
- the piece 7 moves so as to be deeply engaged along the large taper surface 11c.
- the dog teeth 12 of the sleeve 8 mesh the large tooth surface 12b with the large tooth surface 11b of the piece 7, as indicated by reference numeral 12-11 in FIG.
- the engagement device 1 of the present embodiment is supported so as to be rotatable around a rotation axis, and includes a piece 7 having dog teeth 11 and a sleeve 8 having dog teeth 12 supported so as to be movable along the axial direction of the rotation axis.
- a first motor generator MG1 that rotates the piece 7 around the axis, an actuator 9 that moves the sleeve 8 in the axial direction, and an ECU 6 that controls the operation of the first motor generator MG1 and the actuator 9.
- a plurality of dog teeth 11 are formed on the side of the piece 7 facing the sleeve 8 along the circumferential direction around the axis, and the dog teeth 12 are formed on the side of the sleeve 8 facing the piece 7 in the circumferential direction around the axis.
- a plurality are formed along.
- the dog tooth 11 has a pair of tooth surfaces 11a and 11b opposed in the circumferential direction
- the dog tooth 12 has a pair of tooth surfaces 12a and 12b opposed in the circumferential direction.
- the front edge end portion 11e of one small tooth surface 11a is the front edge end portion 11f of the other large tooth surface 11b.
- the front edge end portion 12e of one small tooth surface 12a is the other large tooth when arranged from the back side in the axial direction. It arrange
- the dog teeth 11 and 12 are formed so that the circumferential width on the sides facing each other in the axial direction is reduced.
- the small tooth surface 11a of the dog tooth 11 and the small tooth surface 12a of the dog tooth 12 are arranged so as to face each other when the piece 7 rotates relative to the sleeve 8 in the negative rotation direction.
- the large tooth surface 11b of the tooth 11 and the large tooth surface 12b of the dog tooth 12 are disposed so as to face each other when the piece 7 rotates relative to the sleeve 8 in the positive rotation direction.
- the actuator 9 moves so that the sleeve 8 moves in a direction approaching the piece 7 while the piece 7 rotates in the negative rotation direction with respect to the sleeve 8.
- the first motor generator MG1 is controlled so that the rotational speed of the piece 7 is changed from negative to 0 or more.
- the piece 7 is moved in the direction in which the small tooth surfaces 11a, 12a opposite to the large tooth surfaces 11b, 12b, which are meshing surfaces, approach. Rotate. Thereby, before the stroke operation of the sleeve 8 proceeds, it is possible to avoid a situation where the large tooth surfaces 11b and 12b, which are meshing surfaces, mesh with each other with a very small contact area. Further, since the rotational speed of the piece 7 is controlled from negative to 0 or more after the stroke operation of the sleeve 8 satisfies a predetermined stroke condition, the dog teeth 12 of the sleeve 8 are positioned between the dog teeth 11 of the piece 7.
- the rotation of the piece 7 is changed in the direction in which the large tooth surfaces 11b, 12b, which are meshing surfaces of the dog teeth 11, 12, approach each other. 11b and 12b can be engaged with each other.
- the area of the meshing portion between the large tooth surface 11b of the piece 7 and the large tooth surface 12b of the sleeve 8 can be increased, and a sufficient meshing amount can be secured to maintain the engagement. Can be done.
- the piece 7 is rotated in the direction in which the small tooth surfaces 11a, 12a opposite to the large tooth surfaces 11b, 12b, which are meshing surfaces, approach each other.
- the large taper surfaces 11c and 12c and the end surfaces 11d and 12d of the piece 7 and the sleeve 8 can be brought into surface contact with each other, and a large force is locally applied to the dog teeth 11 and 12 at the time of collision. Can be avoided. As a result, the occurrence of high surface pressure can be suppressed, and the durability of the engagement device 1 can be improved.
- the ECU 6 determines that the sleeve 8 can be brought close to the piece 7 by a predetermined distance, it determines that the stroke condition is satisfied.
- the large tooth surfaces 11b and 12b which are meshing surfaces, can be meshed with each other, so that the engagement can be performed more reliably.
- the ECU 6 controls the actuator 9 so that the sleeve 8 further moves in a direction approaching the piece 7 while changing the rotation speed of the piece 7 from negative to 0 or more.
- the dog teeth 12 of the sleeve 8 can be further moved between the dog teeth 11 of the piece 7 while the large tooth surfaces 11b and 12b, which are meshing surfaces, approach each other.
- 11b and 12b mesh the area of the meshing portion of both can be increased, and the engagement can be performed more reliably.
- the dog teeth 11 of the piece 7 include an end surface 11d disposed opposite to the sleeve 8 at a position closest to the sleeve 8 in the axial direction, an end surface 11d, and a small tooth surface.
- the dog teeth 11 and 12 are formed with the large tapered surfaces 11c and 12c, so that the tip portions on the small tooth surfaces 11a and 12a side of the dog teeth 11 and 12 are reduced, and the dog teeth 11 and 12 are small.
- the space between the dog teeth 11 and 12 can be increased. Thereby, it is possible to prevent the dog teeth 12 of the sleeve 8 from colliding with the dog teeth 11 of the piece 7 at an early stage at the beginning of the engaging operation, and it is possible to enter the deeper position.
- the large taper surfaces 11c and 12c are tapered surfaces along the stroke direction, when the sleeve 8 comes into contact with the piece 7, the relative positions of the two along the large taper surfaces 11c and 12c are smooth. It can be displaced, and engagement control can be performed quickly and with high accuracy.
- the ECU 6 sets the rotation speed when the rotation speed of the piece 7 becomes equal to or greater than a predetermined value in the positive rotation direction after the rotation speed of the piece 7 is changed from negative to 0 or more.
- the first motor generator MG1 is controlled to decrease.
- the rotation speed of the piece 7 can be controlled to a relatively small rotation speed in the positive direction, the shock when the tooth surface 12b of the sleeve 8 contacts the tooth surface 11b of the piece 7 can be reduced. Further, if the rotational speed of the piece 7 is relatively small, the time until the tooth surfaces 11b and 12b mesh with each other after reversing the rotation of the piece 7 can be extended. It is possible to insert further into the space between the seven dog teeth 11, and the engagement can be performed more reliably.
- FIG. 11 is a flowchart of the engagement control process performed by the engagement device of the second embodiment
- FIG. 12 is a time chart of the engagement control process performed by the engagement device of the second embodiment.
- the configuration of the time chart of FIG. 12 is the same as the time chart of FIG. 4 of the first embodiment.
- the second embodiment is different from the first embodiment in that torque change control is started regardless of whether or not the stroke condition is completed in the engagement control process. That is, in the second embodiment, the stroke control is started before the torque change control is started.
- step S201 it will be first determined whether the rotation direction of the piece 7 is a negative rotation (step S201). If the result of determination in step S201 is that the rotation direction of the piece 7 is not negative (No in step S201), the first motor generator MG1 is controlled to change the rotation speed of the piece 7 to negative rotation (step S201). S202), the process returns to step S201.
- the process in step S202 can be performed, for example, by setting the target rotational speed to a negative rotation and performing feedback control on the first motor generator MG1.
- step S201 when it is determined that the rotation direction of the piece 7 is negative rotation (Yes in step S201), the first motor generator MG1 is controlled to control the piece 7 in the positive rotation direction. Torque change control is executed (step S203).
- the target rotation range is a range from 0 rotation to a predetermined negative rotation speed as shown in FIG.
- the determination condition for the transition to the target rotation range can also include that the piece rotation speed stays within the target rotation range for a certain time, as in the first embodiment.
- step S204 If it is determined that the rotation speed of the piece 7 is not within the predetermined target rotation range (No in step S204), the process returns to step S201. On the other hand, when it is determined that the rotation speed of the piece 7 is within the predetermined target rotation range (Yes in step S204), the stroke control for moving the sleeve 8 in the engagement direction while continuing the torque change control is performed. Implemented (step S205).
- the rotational speed of the piece 7 is within the target rotational range of 0 to a predetermined negative rotational speed, so the piece 7 is rotating in the negative rotational direction.
- the piece 7 rotates in a direction in which the small tooth surface 11a of the piece 7 and the small tooth surface 12a of the sleeve 8 approach each other.
- the rotational speed of the piece 7 becomes a positive rotational speed, and the rotational direction of the piece 7 is reversed in a direction in which the large tooth surface 11b of the piece and the large tooth surface 12b of the sleeve 8 approach each other.
- step S206 it is determined whether or not the engagement between the dog teeth 12 of the sleeve 8 and the dog teeth 11 of the piece 7 has been completed. If the engagement is not completed (No in step S206), the process returns to step S205, and the stroke control is continuously executed. On the other hand, when the engagement is completed (Yes in step S206), this control flow is terminated.
- the piece 7 is rotated forward after time t8, the piece 7 is rotated in the direction in which the large tooth surface 11b of the piece 7 and the large tooth surface 12b of the sleeve 8 approach each other, and at time t9. It is determined that the large tooth surface 11b of the piece 7 and the large tooth surface 12b of the sleeve 8 mesh with each other and the engagement between the sleeve 8 and the piece 7 is completed.
- the engagement control between the piece 7 and the sleeve 8 is configured such that the rotational speed of the piece 7 is switched to the normal rotation after the stroke condition of the stroke control described in the first embodiment is completed.
- the conditions (start timing of stroke control) within the target rotation range in S204 are set. In the time chart of FIG. 12, it is determined that the time necessary for the sleeve 8 to move the predetermined stroke amount has elapsed and the stroke condition is completed at the time t8 when the piece rotation speed is switched from negative to positive. Can do.
- FIG. 13 is an enlarged schematic view of the main part of the engaging device according to the third embodiment of the present invention.
- the engaging device 1 of the third embodiment is a spring that is expanded and contracted in the axial direction in accordance with the abutment. 14 (biasing means) is different from the first and second embodiments in that it is connected to the piece 7.
- the spring 14 is connected to the piece 7 so that it can extend and contract along the axial direction of the rotary shaft 13.
- the piece 7 is installed so as to be movable along the axial direction only within the expansion / contraction range of the spring 14.
- the spring 14 expands and contracts according to the movement of the piece 7 in the axial direction due to the abutment, and exerts a biasing force in the direction opposite to the expansion and contraction direction.
- the sleeve 8 is provided with a stopper 15.
- the sleeve 8 is restricted from moving further toward the piece 7 by a stopper 15 at a predetermined position in the stroke direction.
- the installation position of the stopper 15 can be set so that the movement of the sleeve 8 is restricted, for example, at a position where the dog teeth 12 of the sleeve 8 completely engage with the dog teeth 11 of the piece 7.
- the configuration in which the spring 14 is directly connected to the piece 7 is illustrated, but the spring 14 moves in the axial direction of the piece 7 by contact with the sleeve 8. If it is possible to realize the application of the urging force to the sleeve 8 side, it is not necessary to directly connect to the piece 7, and it is only necessary to be disposed between the first motor generator MG1 that is the drive source of the piece 7 and the piece 7.
- the engagement device 1 of the third embodiment can execute the control flow of the first embodiment shown in FIG. 3 and can also execute the control flow of the second embodiment shown in FIG.
- the action of the piece 7 and the sleeve 8 is the first and second operations by the action of the spring 14. Different from that of the second embodiment.
- step S104 the stroke control of the sleeve 8 is started in a state where the piece 7 maintains the rotation within the predetermined target rotation range.
- FIG. 14 is a schematic diagram showing a state in which the sleeve 8 approaches the piece 7 after the stroke control is started. At this time, as shown in FIG. 14, the sleeve 8 is moved in the engaging direction by the thrust, and the dog teeth 12 of the sleeve 8 are approaching the dog teeth 11 of the piece 7 that is rotating negatively.
- step S105 If it is determined in step S105 that the stroke condition of the sleeve 8 has not been completed (No in step S105), the process returns to step S104 and the stroke control is continued.
- FIG. 15 is a schematic diagram showing a state where the large taper surface 12c of the sleeve 8 collides with the large taper surface 11c of the piece 7 during execution of the stroke control.
- the large tapered surface 12 c of the sleeve 8 that moves in the engagement direction collides with the large tapered surface 11 c of the piece 7 that rotates negatively.
- step S106 When it is determined that the stroke condition of the sleeve 8 has been completed (Yes in step S105), torque change control of the piece 7 in the forward rotation direction is performed in step S106.
- FIG. 16 and 17 are schematic diagrams showing the positional relationship between the sleeve 8 and the piece 7 during the execution of the torque change control.
- FIG. 16 shows a state when the negative rotation of the piece 7 is stopped by the application of the additional torque
- FIG. 17 shows a state where the rotation direction of the piece 7 is reversed to the positive rotation by the application of the additional torque.
- Step S109 when it is determined that the engagement between the dog teeth 12 of the sleeve 8 and the dog teeth 11 of the piece 7 is completed (Yes in Step S109), this control flow is finished.
- FIG. 18 is a schematic view showing a state where the dog teeth 12 of the sleeve 8 are engaged with the dog teeth 11 of the piece 7. After the piece 7 moves along the large tapered surface 12c of the sleeve 8 in the direction of the arrow B shown in FIG. 17, when the piece 7 passes the large tapered surface 12c of the sleeve 8, as shown in FIG. The spring 14 is further pushed back toward the sleeve 8 in the stroke direction by the urging force of the spring 14.
- the tooth surface 12b of the sleeve 8 approaches the tooth surface 11b of the piece 7 while increasing the overlapping portion viewed from the rotational direction of the tooth surface 12b of the sleeve 8 and the tooth surface 11b of the piece 7, Both of them collide with each other to ensure a sufficient meshing area and mesh with each other.
- the engaging device 1 of the third embodiment includes a spring 14 that is urged in the axial direction in response to the abutment. Since the spring 14 is contracted by using the pressing force when it collides with the piece 7 and the piece 7 can be pushed back toward the sleeve 8 by the biasing force generated by the contraction of the spring 14, the dog teeth of the piece 7 11 can be inserted all the way between the dog teeth 12 of the sleeve 8. Thereby, it becomes possible to further increase the area of the meshing portion between the large tooth surface 11b of the piece 7 and the large tooth surface 12b of the sleeve 8, and the engagement can be performed more reliably. Further, since the impact force can be absorbed by the spring 14 when the sleeve 8 collides with the piece 7, a shock at the time of engagement can be reduced.
- the configuration in which the spring 14 is installed on the piece 7 is illustrated.
- the spring 14 may be installed on the sleeve 8 or on both the piece 7 and the sleeve 8. Further, the spring 14 may be replaced with other urging means that can be urged in accordance with the movement of the piece 7 or the sleeve 8 in the axial direction.
- the configuration in which the engagement device 1 according to the present invention is applied as the MG1 lock mechanism that mechanically locks the rotation of the first motor generator MG1, but the engagement device 1 according to the present invention is as follows.
- the present invention can also be applied as an engagement element related to other elements in the drive device such as overdrive lock, engine direct shaft speed change, engine shaft disconnection, and the like.
- the engagement device 1 according to the present invention can be replaced with a conventional engagement element such as an in-AT wet multi-plate clutch.
- the dog teeth 11 of the piece 7 and the dog teeth 12 of the sleeve 8 are illustrated as protruding from each other, but the positions of the teeth of the piece 7 and the sleeve 8 may be in other forms.
- the teeth of the piece 7 may protrude outward in the radial direction
- the teeth of the sleeve 8 may protrude inward from the radially outer side of the piece 7.
- the dog teeth 11 of the piece 7 and the dog teeth 12 of the sleeve 8 have the same length in the axial direction.
- any shape having the small tooth surfaces 11a and 12a and the large tooth surfaces 11b and 12b may be used.
- the piece 7 rotated and the sleeve 8 linearly moved to one direction was illustrated, the relative positional relationship of a rotation direction and a stroke direction was changed between the piece 7 and the sleeve 8.
- Any other mode may be used as long as it is possible.
- either one of the piece 7 and the sleeve 8 may be configured to be movable in both the rotational direction and the stroke direction.
- the piece 7 moves in the stroke direction, and the sleeve 8 moves in the rotational direction. It is good also as a structure which moves.
- the large tapered surfaces 11c and 12c are formed on the dog teeth 11 of the piece 7 and the dog teeth 12 of the sleeve 8.
- the small tooth surfaces 11a and 12a are connected to the end surfaces 11d and 12d.
- Any other shape such as a convex curved surface, a concave curved surface, or a step shape may be used in addition to the tapered shape.
- the torque change control is performed to change the driving torque of the piece 7 in consideration of responsiveness and controllability.
- a configuration in which the target rotational speed of the rotational speed control is changed to normal rotation may be used.
- the actuator 9 for controlling the stroke of the sleeve 8 is exemplified as having the ratchet function that idles when subjected to the reaction force, but an actuator having no ratchet function may be applied.
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Abstract
Description
図1~8を参照して第一実施形態について説明する。まず図1,2を参照して、第一実施形態に係る係合装置1の構成について説明する。図1は、本発明の第一実施形態に係る係合装置が適用されるハイブリッド車両用駆動装置の概略構成を示す図であり、図2は、図1中の係合装置の要部を拡大視した模式図である。
(i)第一モータジェネレータMG1を駆動して、ピース7及びスリーブ8の小歯面11a,12aが相互に当接する方向、すなわち負回転方向にピース7を回転させる回転数制御を行う。
(ii)ピース7の回転数が、所定の目標回転範囲内(0回転~所定の負回転数)に入った後に、アクチュエータ9を駆動して、ストローク方向のスリーブ8からピース7への接近方向に沿って、スリーブ8をピース7へ接近するよう移動させるストローク動作を行う。
(iii)スリーブ8が所定のストローク条件(例えば所定のストローク量だけ移動したこと)を完了するまでスリーブ8をピース7に接近させた後に、第一モータジェネレータMG1に正方向のトルクを追加するトルク変更制御を行い、ピース7の回転方向を負方向から正方向に変更させ、ピース7及びスリーブ8の大歯面11b,12b同士を噛み合わせる。
(1)スリーブ8のドグ歯12がピース7のドグ歯11に当接せずに歯間に進入した状態。
(2)スリーブ8のドグ歯12の大テーパ面12cがピース7のドグ歯11の大テーパ面11cと当接した状態。
(3)スリーブ8のドグ歯12の端面12dがピース7のドグ歯11の端面11dと当接した状態。
図5,6に、このパターンの場合のストローク動作開始から係合完了までのスリーブ8のドグ歯12のピース7に対する位置の推移を符号12-1、12-2、12-3、12-4までの4段階で示している。
図7,8に、このパターンの場合のストローク動作開始から係合完了までのスリーブ8のドグ歯12のピース7に対する位置の推移を符号12-1、12-5、12-6、12-7の4段階で示している。
図9,10に、このパターンの場合のストローク動作開始から係合完了までのスリーブ8のドグ歯12の動きを符号12-1、12-8、12-9、12-10、12-11の5段階で示している。
次に、図11、12を参照して、第二実施形態について説明する。図11は、第二実施形態の係合装置により実施される係合制御処理のフローチャートであり、図12は、第二実施形態の係合装置により実施される係合制御処理のタイムチャートである。図12のタイムチャートの構成は、第一実施形態の図4のタイムチャートと同一である。
次に、図13~18を参照して、第三実施形態について説明する。図13は、本発明の第三実施形態の係合装置の要部を拡大視した模式図である。
一方、スリーブ8のストローク条件が完了したものと判定された場合には(ステップS105のYes)、ステップS106にて正回転方向へのピース7のトルク変更制御が実施される。
6 ECU(制御手段)
MG1 第一モータジェネレータ(回転手段)
7 ピース(第一部材)
8 スリーブ(第二部材)
9 アクチュエータ(移動手段)
11 ピースのドグ歯(被係合歯)
12 スリーブのドグ歯(係合歯)
11a,12a 小歯面(第一歯面)
11b,12b 大歯面(第二歯面)
11e,12e 小歯面の前縁端部
11f,12f 大歯面の前縁端部
11c 大テーパ面(被係合歯側接続面)
12c 大テーパ面(係合歯側接続面)
13 回転軸
14 バネ(付勢手段)
Claims (8)
- 被係合歯を有する第一部材と、
前記第一部材と同軸上に配置され、係合歯を有する第二部材と、
前記第一部材と前記第二部材との間で軸線まわりに相対回転させる回転手段と、
前記第一部材と前記第二部材との間で軸線方向に相対移動させる移動手段と、
前記回転手段及び前記移動手段の動作を制御する制御手段と、
を備え、
前記被係合歯は、前記第一部材の前記第二部材と対向する側に、前記軸線まわりの周方向に沿って複数形成され、前記係合歯は、前記第二部材の前記第一部材と対向する側に、前記軸線まわりの周方向に沿って複数形成されており、
前記被係合歯および前記係合歯は、前記周方向にて対向する一対の歯面を有し、
前記第二部材側から視たときに、前記被係合歯の前記一対の歯面のうち、一方の第一歯面の前縁端部は、他方の第二歯面の前縁端部より軸線方向奥側に配置され、前記第一部材側から視たときに、前記係合歯の前記一対の歯面のうち、一方の第一歯面の前縁端部は、他方の第二歯面の前縁端部より軸線方向奥側に配置されており、
前記被係合歯及び前記係合歯は、軸線方向の相互に対向する側の前記周方向の幅が小さくなるよう形成され、
前記被係合歯の前記第一歯面と、前記係合歯の前記第一歯面は、前記第一部材が前記第二部材に対して負回転方向に相対回転するときに、相互に対向して接近するよう配置され、
前記被係合歯の前記第二歯面と、前記係合歯の前記第二歯面は、前記第一部材が前記第二部材に対して正回転方向に相対回転するときに、相互に対向して接近するよう配置され、
前記制御手段は、前記第一部材と前記第二部材とを係合させる際に、
前記第一部材が前記第二部材に対して前記負回転方向に相対回転している状態で、前記第一部材と前記第二部材とが相互に接近する方向に相対移動するよう前記移動手段を制御し、
さらに、前記第一部材と前記第二部材との相対移動に関する所定の移動条件を満たした後に、前記第一部材の前記第二部材に対する相対回転数が負から0以上となるよう前記回転手段を制御する、
ことを特徴とする係合装置。 - 前記制御手段は、前記第一部材と前記第二部材とを所定の距離だけ接近させることができると判定したとき、前記移動条件を満たしたものと判定することを特徴とする、請求項1に記載の係合装置。
- 前記制御手段は、前記相対回転数を負から0以上へ変更する間に、さらに前記第一部材と前記第二部材とが相互に接近する方向に相対移動するよう前記移動手段を制御することを特徴とする、請求項1または2に記載の係合装置。
- 前記第一部材または前記第二部材の少なくとも一方に、前記第一部材と前記第二部材とが前記軸線方向において当接するときに、前記当接に応じて前記軸線方向に付勢される付勢手段を備えることを特徴とする、請求項1~3のいずれか1項に記載の係合装置。
- 前記第一部材の前記被係合歯は、
前記軸線方向の前記第二部材に最も近い位置にて前記第二部材と対向して配置される端面と、
前記端面と前記被係合歯の前記第一歯面とを接続する被係合歯側接続面と、を有し、
前記第二部材の前記係合歯は、
前記軸線方向の前記第一部材に最も近い位置にて前記第一部材と対向して配置される端面と、
前記端面と前記係合歯の前記第一歯面との間を接続する係合歯側接続面とを有することを特徴とする、請求項1~4のいずれか1項に記載の係合装置。 - 前記被係合歯側接続面及び前記係合歯側接続面が、テーパ形状の面であることを特徴とする、請求項5に記載の係合装置。
- 前記制御手段は、前記相対回転数を負から0以上とした後に、前記相対回転数が前記正回転方向の所定値以上となったとき、前記相対回転数を減少させるよう前記回転手段を制御することを特徴とする、請求項1~6のいずれか1項に記載の係合装置。
- 前記第一部材が回転軸まわりに回転自在に支持され、
前記第二部材が軸線方向に沿って移動自在に支持され、
前記回転手段は、前記第一部材を前記軸線まわりに回転させ、
前記移動手段は、前記第二部材を前記軸線方向に移動させ、
前記制御手段は、前記第一部材と前記第二部材とを係合させる際に、
前記第一部材が負回転方向に回転している状態で、前記第二部材が前記第一部材に接近する方向に移動するよう前記移動手段を制御し、
さらに、前記移動条件を満たした後に、前記第一部材の回転数が負から0以上となるよう前記回転手段を制御する、
ことを特徴とする、請求項1~7のいずれか1項に記載の係合装置。
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KR1020157019803A KR101689098B1 (ko) | 2013-01-22 | 2013-01-22 | 결합 장치 |
US14/762,380 US10030724B2 (en) | 2013-01-22 | 2013-01-22 | Engagement device |
EP13872689.8A EP2949956B1 (en) | 2013-01-22 | 2013-01-22 | Engagement device |
CN201380071052.1A CN104937300B (zh) | 2013-01-22 | 2013-01-22 | 卡合装置 |
PCT/JP2013/051212 WO2014115248A1 (ja) | 2013-01-22 | 2013-01-22 | 係合装置 |
JP2014558317A JP5935905B2 (ja) | 2013-01-22 | 2013-01-22 | 係合装置 |
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US10677292B2 (en) | 2016-10-14 | 2020-06-09 | Hamilton Sundstrand Corporation | Generator disconnect couplings |
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EP2949956B1 (en) | 2019-12-25 |
EP2949956A4 (en) | 2017-01-11 |
CN104937300B (zh) | 2017-07-04 |
JPWO2014115248A1 (ja) | 2017-01-19 |
KR20150097791A (ko) | 2015-08-26 |
US20150362027A1 (en) | 2015-12-17 |
KR101689098B1 (ko) | 2016-12-22 |
JP5935905B2 (ja) | 2016-06-15 |
CN104937300A (zh) | 2015-09-23 |
EP2949956A1 (en) | 2015-12-02 |
US10030724B2 (en) | 2018-07-24 |
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