JP2013107506A - Vehicle drive device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicle drive device provided with a meshing type engagement device capable of further improving its energy efficiency as a whole as compared with conventional ones.SOLUTION: The engagement device 22 is the meshing type engagement device including: a wheel side engagement portion 42 which is connected to wheels 7 in a drivable manner; a rotating electric machine side engagement portion 52 which is connected to a second rotating electric machine 12 in a drivable manner; and a state selection member 32 which is selectively engaged to at least one of the wheel side engagement portion 42 and the rotating electric machine side engagement portion 52 to switch the state of the engagement device 22. The state selection member 32 is configured to select a first position P1 which is engaged to the wheel side engagement portion 42 as a non-connected position for separating the wheel side engagement portion 42 from the rotating electric machine side engagement portion 52 but separated from the rotating electric machine side engagement portion 52 or a second position P2 which is engaged to the rotating electric machine side engagement portion 52 and separated from the wheel side engagement portion 42.

Description

  The present invention relates to a vehicle drive device that includes a first rotating electrical machine that is drivingly connected to a wheel, an engagement device, and a second rotating electrical machine that is driven and connected to the wheel via the engagement device.

  As a conventional technique of the vehicle drive device as described above, there is a technique described in, for example, Japanese Patent Laid-Open No. 6-153325 (Patent Document 1). In the description of the background art section, the member names in Patent Document 1 are quoted in []. In FIG. 3 of Patent Document 1, a plurality of rotating electrical machines [motors M1 ′, M2 ′, M3 ′, M4 ′] are respectively connected to engaging devices [variable control clutches C1 ′, C2 ′, C3 ′, C4 ′. ] Is connected to the wheel [wheel 22] via the wheel. By providing such an engagement device, a rotating electrical machine that does not generate a driving force can be separated from the wheel, and energy loss can be reduced by avoiding rotation of the rotating electrical machine.

  By the way, in order to improve the energy efficiency of the entire device, it is considered to use a meshing engagement device such as a dog clutch as the engagement device arranged in the power transmission path between the rotating electrical machine and the wheel. It is done. However, Patent Document 1 does not mention that an engagement type engagement device is used.

Japanese Patent Laid-Open No. 6-153325 (see FIG. 3 etc.)

  Therefore, it is desirable to realize a configuration that can further improve the energy efficiency of the entire drive device in the vehicle drive device including the meshing engagement device as compared with the conventional drive device.

  The first rotating electrical machine that is drivingly connected to the wheel according to the present invention, the engaging device, the second rotating electrical machine that is drivingly connected to the wheel via the engaging device, and the compressor for the air conditioner And a compressor connecting member to be connected, wherein the second rotating electrical machine is disposed in a power transmission path between the engaging device and the compressor connecting member, and the engagement The apparatus includes a wheel side engaging portion that is drivingly connected to the wheel, a rotating electrical machine side engaging portion that is drivingly connected to the second rotating electrical machine, the wheel side engaging portion, and the rotating electrical machine side engaging portion. And a state switching member that switches a state of the engagement device by selectively engaging with at least one of the engagement devices, and the state switching member includes the wheel side engagement portion. And the rotating electrical machine side engaging portion As a non-connection position for making a connected state, the first position that engages with the wheel side engaging portion and separates from the rotating electric machine side engaging portion, the first position that engages with the rotating electric machine side engaging portion, The second position separated from the wheel side engaging portion is configured to be selectable.

In the present application, “driving connection” refers to a state where two rotating elements are connected so as to be able to transmit a driving force, and the two rotating elements are connected so as to rotate integrally, or the two The rotating element is used as a concept including a state in which the driving force is connected to be transmitted through one or more transmission members. Examples of such a transmission member include various members that transmit rotation at the same speed or a variable speed, and include, for example, a shaft, a gear mechanism, a belt, a chain, and the like. Further, as such a transmission member, an engagement device that selectively transmits rotation and driving force, for example, a friction engagement device or a meshing engagement device may be included.
Further, in the present application, the “rotary electric machine” is used as a concept including a motor (electric motor), a generator (generator), and a motor / generator functioning as both a motor and a generator as necessary.

According to said characteristic structure, the engagement apparatus which can switch an engagement state is arrange | positioned in the power transmission path | route between a 2nd rotary electric machine and a wheel. As a result, the second rotating electrical machine can be disconnected from the wheel when the second rotating electrical machine does not need to generate a driving force for driving the wheel, and energy loss caused by the rotation of the second rotating electrical machine is suppressed. Thus, the energy efficiency of the entire drive device can be improved. Furthermore, since the second rotating electrical machine is disposed in the power transmission path between the engagement device and the compressor connecting member, when it is not necessary to generate a driving force for driving the wheels to the second rotating electrical machine, The compressor can be driven by the second rotating electrical machine separated from the wheel. At this time, since the second rotating electrical machine can be driven at an optimum rotational speed for driving the compressor, the energy efficiency of the entire driving device can be improved also from this point.
In this manner, the energy efficiency of the entire drive device can be improved by switching the engagement device to the disconnected state as necessary. And according to said characteristic structure, while this engagement apparatus is a meshing type engagement apparatus, the engaging part engaged with the said state switching member differs in the non-connection position of a state switching member. You can choose from one position. That is, in the non-coupled state of the engagement device, the engagement portion that engages with the state switching member and rotates integrally is the lower of the rotation speed of the wheel side engagement portion and the rotating electrical machine side engagement portion. Is configured to be possible. Thereby, when the member for pressing and switching the position of the state switching member is constituted by a non-rotating member engaged with the state switching member, the rotation speed between the state switching member and the non-rotating member By suppressing the difference, energy loss due to these sliding operations can be suppressed.
As described above, according to the above-described characteristic configuration, with respect to the meshing engagement device that can improve the energy efficiency of the entire device by switching to the non-connected state as necessary, the energy loss in the non-connected state is reduced. Suppression is possible. Thereby, in the vehicle drive device provided with the meshing engagement device, it is possible to realize a configuration that can further improve the energy efficiency of the entire drive device as compared with the conventional case.

  Here, a control device for controlling the engagement device is further provided, and the control device changes the state of the engagement device from a connected state in which the wheel side engagement portion and the rotating electrical machine side engagement portion are connected. When switching to the non-coupled state, a non-coupled position selector that selects the non-coupled position from the first position and the second position is provided, and the non-coupled position selector includes the engagement device. The predicted rotational speed of the wheel side engaging portion is determined by determining the magnitude relationship between the predicted rotational speed of the wheel side engaging portion and the predicted rotating speed of the rotating electrical machine side engaging portion after switching to the disconnected state. Is lower than the predicted rotational speed of the rotating electrical machine side engaging part, the first position is selected, and the predicted rotational speed of the rotating electrical machine side engaging part is lower than the predicted rotational speed of the wheel side engaging part Preferably, the second position is selected.

  According to this configuration, in the period including at least immediately after switching to the unconnected state in the period in which the engagement device is in the non-connected state, the state switching member is connected to the wheel side engaging portion and the rotating electrical machine side engaging member. It can be rotated integrally with the one with the lower rotation speed in the joint. Thereby, when the member for pressing and switching the position of the state switching member is constituted by a non-rotating member engaged with the state switching member, at least immediately after the switching of the engaging device to the non-connected state is included. In the period, it is possible to suppress energy loss due to the engagement device in the non-connected state.

  In the configuration in which the control device includes the non-coupled position selection unit as described above, the non-coupled position selection unit is configured so that the size of the air conditioner is small or large when the compressor is not required to be driven. It is preferable that the second position is selected without determining the relationship.

  According to this configuration, when the state of the air conditioner is a state that does not require driving of the compressor, the processing related to the selection of the unconnected position can be simplified and the load related to the calculation can be suppressed. When the air conditioner is in a state that does not require driving of the compressor, it is not necessary to rotate the second rotating electrical machine to drive the compressor. Therefore, when the engagement device is not connected, the rotational speed of the second rotating electrical machine is generally low, and the rotational speed of the rotating electrical machine side engaging portion that is drivingly connected to the second rotating electrical machine is also low. For example, when the second rotating electrical machine is not used for purposes other than driving the compressor in a disconnected state of the engagement device, the rotational speed of the second rotating electrical machine or the rotating electrical machine side engaging portion is basically zero. Become. Therefore, if the conditioner is in a state where it is not necessary to drive the compressor, it coincides with the case where the second position is selected when the above-described magnitude relation is determined with high probability. Even in the case where the second position is selected as the non-connected position without performing the above-described determination of the magnitude relationship, it is possible to suppress energy loss due to the engaging device in the non-connected state in many cases. Become.

  In the configuration including the control device as described above, the magnitude relationship between the rotation speed of the wheel-side engagement portion and the rotation speed of the rotating electrical machine-side engagement portion is reversed in the disconnected state of the engagement device. In this case, the control device switches the state in a synchronized state where a rotational speed difference between a rotational speed of the wheel side engaging portion and a rotational speed of the rotating electrical machine side engaging portion is less than a differential rotation threshold. It is preferable to perform a non-connected position switching control for switching the position of the member between the first position and the second position.

  According to this configuration, the state switching member is integrated with the lower one of the wheel side engaging portion and the rotating electrical machine side engaging portion over the entire period in which the engaging device is in the non-connected state. Since it can rotate, it becomes easy to suppress the energy loss resulting from the engaging apparatus in a non-connected state.

  Further, according to this configuration, when the rotation speed of the wheel side engagement portion is lower than the rotation speed of the rotating electrical machine side engagement portion in the non-connected state of the engagement device, the control device When the state switching member is positioned at the first position and the rotational speed of the rotating electrical machine side engaging portion is lower than the rotational speed of the wheel side engaging portion, the state switching member is positioned at the second position. In addition, it is possible to easily realize a configuration for controlling the position of the state switching member, and it is easy to suppress energy loss caused by the engaging device in the unconnected state.

It is a schematic diagram which shows the structure of the vehicle drive device which concerns on embodiment of this invention. It is a partial cross section figure of the vehicle drive device in the state which has the 2nd state switching member which concerns on embodiment of this invention in a 3rd position. It is a partial cross section figure of the drive device for vehicles in the state where the 2nd state change member concerning the embodiment of the present invention exists in the 2nd position. It is a partial cross section figure of the drive device for vehicles in the state where the 2nd state change member concerning the embodiment of the present invention exists in the 1st position. It is a block diagram which shows the structure of the control apparatus which concerns on embodiment of this invention. It is a flowchart which shows the whole procedure of the 2nd engagement apparatus control process which concerns on embodiment of this invention. It is a flowchart which shows the procedure of the determination process at the time of the connection state which concerns on embodiment of this invention. It is a flowchart which shows the procedure of the determination process at the time of the unconnected state which concerns on embodiment of this invention.

  An embodiment of a vehicle drive device according to the present invention will be described with reference to the drawings. In the following description, unless otherwise specified, “axial direction L”, “radial direction R”, and “circumferential direction” are defined with reference to the axial center of the second engagement device 22. . The “first axial direction L1” represents a direction (left direction in FIGS. 1 and 2) from the second rotating electrical machine 12 side to the second engagement device 22 side along the axial direction L. “Two directions L2” represents a direction opposite to the first axial direction L1 (the right direction in FIGS. 1 and 2). In addition, the direction about each member represents the direction in the state in which the said member was assembled | attached to the vehicle drive device 1. FIG. Further, terms relating to the direction, position, etc. of each member are used as a concept including a state having a difference due to an allowable error in manufacturing.

1. Overall Configuration of Vehicle Drive Device As shown in FIG. 1, a vehicle drive device 1 according to this embodiment includes a first rotating electrical machine 11, a second rotating electrical machine 12, a first engaging device 21, and a second An engagement device 22 and a case 3 for housing these are provided. The first rotating electrical machine 11 is drivingly connected to the wheel 7 via the first engaging device 21, and the second rotating electrical machine 12 is drivingly connected to the wheel 7 via the second engaging device 22. Thereby, this vehicle drive device 1 transmits the torque of one or both of the first rotating electrical machine 11 and the second rotating electrical machine 12 to the wheels 7 to drive the vehicle. Such a vehicle drive device 1 is provided in a hybrid vehicle or an electric vehicle, for example. In the present embodiment, the vehicle drive device 1 includes only the rotating electrical machines 11 and 12 as the driving force source for the wheels 7, and the driving force transmitted to the wheels 7 is generated only by the rotating electrical machines 11 and 12.

  The first rotating electrical machine 11 includes a first stator 11a fixed to the case 3 and a first rotor body 11b disposed so as to be rotatable with respect to the first stator 11a. In the present example, the first rotor body 11b is disposed inside the radial direction R of the first stator 11a. The first rotor body 11b is fixed to the first rotation shaft 71 so as to rotate integrally with the first rotation shaft 71 arranged so as to protrude from the first rotor body 11b on both sides in the axial direction L. ing. The second rotating electrical machine 12 is basically configured in the same manner as the first rotating electrical machine 11, and includes a second stator 12a corresponding to the first stator 11a, and a second rotor body 12b corresponding to the first rotor body 11b. The second rotor body 12b is fixed to a second rotating shaft 72 corresponding to the first rotating shaft 71. In the present embodiment, as the first rotating electrical machine 11 and the second rotating electrical machine 12, the upper limit value of the torque that can be output is larger than that of the second rotating electrical machine 12, and the rotation that can output torque. For the upper limit value of the speed, the second rotating electrical machine 12 is larger than the first rotating electrical machine 11.

  The vehicle drive device 1 includes a compressor connecting shaft 73 that is drivingly connected to a compressor 9 for an air conditioner. The compressor 9 is a device that compresses a heat medium used in the air conditioner. In the present embodiment, the compressor connecting shaft 73 is drivingly connected to a portion of the second rotating shaft 72 closer to the second axial direction L2 than the second rotor body 12b so as to rotate integrally with the second rotating shaft 72. . In this embodiment, the compressor connecting shaft 73 is drivingly connected to the compressor driving shaft so as to rotate integrally with the compressor driving shaft that drives the compressor 9. Thereby, the compressor 9 can be driven by the torque of the second rotating electrical machine 12 transmitted to the compressor connecting shaft 73. The second rotating electrical machine 12 is disposed in the power transmission path between the second engagement device 22 and the compressor connecting shaft 73. Thereby, the 2nd rotary electric machine 12 can be cut off from the wheel 7 by making the 2nd engagement apparatus 22 into a non-connection state (non-engagement state), and the stop state (state in which the wheel 7 is not rotating) ), The compressor 9 can be driven by the second rotating electrical machine 12. In the present embodiment, the compressor connecting shaft 73 corresponds to the “compressor connecting member” in the present invention.

  In the present embodiment, as shown in FIG. 1, the power transmission path between the first engagement device 21 and the wheel 7 and the power transmission path between the second engagement device 22 and the wheel 7 are respectively provided. A drive gear 10, a counter gear mechanism 5, and an output differential gear device 6 are disposed. That is, in the present embodiment, the first rotating electrical machine 11 is drivingly connected to the drive gear 10 via the first engaging device 21, and the second rotating electrical machine 12 is driven via the second engaging device 22. Drive coupled to the gear 10. The drive gear 10 is drivingly connected to the wheel 7 via the counter gear mechanism 5 and the output differential gear device 6. Thereby, when the vehicle travels, the torque in the same direction as the rotation direction of the drive gear 10 that functions as the counter drive gear, in other words, the torque in the same direction as the rotation of the first rotating electrical machine 11 or the second rotating electrical machine 12 is applied to the wheels. 7 is transmitted. In the present embodiment, the output differential gear device 6 is constituted by a differential gear mechanism using a plurality of bevel gears meshing with each other. Further, in the present embodiment, the drive gear 10, the counter gear mechanism 5, and the output differential gear device 6 are separately arranged on three different shafts that are parallel to each other. The rotating electrical machine 12, the first engagement device 21, and the second engagement device 22 are arranged coaxially with the drive gear 10.

  As shown in FIG. 1, the case 3 includes a first rotating electrical machine 11, a second rotating electrical machine 12, a first engaging device 21, a second engaging device 22, a drive gear 10, a counter gear mechanism 5, and an output difference. The moving gear device 6 is accommodated. Specifically, the case 3 includes a peripheral wall 90 that covers the outer periphery of the first rotary electric machine 11 and the second rotary electric machine 12, and a first end wall 91 that covers an opening of the peripheral wall 90 on the first axial direction L1 side. And a second end wall portion 92 that covers the opening of the peripheral wall portion 90 on the second axial direction L2 side. The case 3 includes a first support wall portion 81, a second support wall portion 82, and a third support wall portion 83, and the case internal space formed inside the radial direction R of the peripheral wall portion 90 is an axial direction L. The first support wall portion 81, the third support wall portion 83, and the second support wall portion 82 are arranged in the order described from the first axial direction L1 side.

  The first rotating electrical machine 11 is housed in a first rotating electrical machine housing space formed between the first end wall portion 91 and the first support wall portion 81 in the axial direction L, and the first rotating shaft 71 is The first through hole 81a (see FIG. 2) formed in the first support wall portion 81 is inserted. And the 1st rotating shaft 71 is the state which can rotate with respect to case 3 with the 4th bearing 64 arrange | positioned at the 1st end wall part 91, and the 1st bearing 61 arrange | positioned at the 1st through-hole 81a. It is supported by. The second rotating electrical machine 12 is housed in a second rotating electrical machine housing space formed between the second end wall portion 92 and the second support wall portion 82 in the axial direction L, and the second rotating shaft 72 is The second through hole 82a (see FIG. 2) formed in the second support wall portion 82 is inserted. And the 2nd rotating shaft 72 is the state which can be rotated with respect to case 3 with the 5th bearing 65 arrange | positioned at the 2nd end wall part 92, and the 2nd bearing 62 arrange | positioned at the 2nd through-hole 82a. It is supported by. In the present embodiment, the compressor 9 is attached to the second end wall portion 92 from the second axial direction L2 side, and the compressor connecting shaft 73 that rotates integrally with the second rotary shaft 72 is the second end wall. It is inserted through a through hole formed in the portion 92.

  The first engagement device 21 is accommodated in a first engagement device accommodation space formed between the first support wall portion 81 and the third support wall portion 83 in the axial direction L, and the second engagement device 22 is housed in a second engagement device housing space formed between the second support wall portion 82 and the third support wall portion 83 in the axial direction L. Thus, the first engagement device 21 and the second engagement device 22 are arranged separately on both sides in the axial direction L with respect to the third support wall portion 83. Therefore, an engagement portion (first wheel side engagement portion 41 described later) of the first engagement device 21 and an engagement portion (second wheel side engagement portion 42 described later) of the second engagement device 22. As shown in FIG. 2, the drive gear shaft 13 having both is disposed so as to be inserted into a third through hole 83 a formed in the third support wall portion 83. The drive gear shaft 13 is supported in a rotatable state with respect to the case 3 by a third bearing 63 disposed in the third through hole 83a.

2. Next, the configuration of the first engagement device 21 and the second engagement device 22 according to the present embodiment will be described. As shown in FIGS. 1 and 2, the second engagement device 22 is a meshing engagement device. The second engagement device 22 is provided in a power transmission path between the second rotating electrical machine 12 and the drive gear 10, and the second rotating electrical machine is switched by switching the engagement state of the second engaging device 22. The state of connection between 12 and the drive gear 10 (wheel 7) is switched. In the present embodiment, the second engagement device 22 corresponds to the “engagement device” in the present invention.

  Specifically, the second engagement device 22 includes a second wheel side engagement portion 42, a second rotating electrical machine side engaging portion 52, a second wheel side engaging portion 42, and a second rotating electrical machine side engagement. And a second state switching member 32 that switches the state of the second engagement device 22 by selectively engaging with at least one of the parts 52. Here, the second rotating electrical machine side engaging portion 52 is an engaging portion that is drivingly connected to the second rotating electrical machine 12, and in this embodiment, an external tooth engaging portion that rotates integrally with the second rotating shaft 72. It is said that. Further, the second wheel side engaging portion 42 is an engaging portion that is drivingly connected to the wheel 7 via the drive gear 10. In the present embodiment, the second wheel side engaging portion 42 is an external tooth engaging portion that rotates integrally with the drive gear 10. Has been. In the present embodiment, the second wheel side engaging portion 42, the second rotating electrical machine side engaging portion 52, and the second state switching member 32 are respectively referred to as “wheel side engaging portion” and “rotating electrical machine side” in the present invention. It corresponds to “engagement part” and “state switching member”.

  In the present embodiment, as shown in FIG. 2, the drive gear shaft 13 that is the rotation shaft of the drive gear 10 includes the intermediate shaft 14, the outer shaft 15, and the engaging portion forming member 16, and the first rotation in the axial direction L. It is arranged between the shaft 71 and the second rotating shaft 72. The outer shaft 15 is a cylindrical member having a hollow inside in the radial direction R and having a drive gear 10 formed on the outer peripheral portion, and the middle shaft 14 is inserted into the hollow portion of the outer shaft 15. 14 and the outer shaft 15 are connected by spline engagement. Then, the outer shaft 15 is engaged with an outer peripheral surface of the end portion on the side in the second axial direction L2 that is a cylindrical member having a larger diameter than the outer shaft 15 so as to be fitted (externally fitted) to the outer peripheral surface. The part forming member 16 is fixed. And the 2nd wheel side engaging part 42 is formed in the outer peripheral part of the axial direction 2nd direction L2 side edge part of the engaging part formation member 16. As shown in FIG. Moreover, the 2nd rotating shaft 72 is provided with the flange part in the edge part by the side of the shaft 1st direction L1, and the 2nd rotary electric machine side engaging part 52 is formed in the outer peripheral part of the said flange part.

  The second state switching member 32 is a cylindrical (sleeve-shaped) member that can move along the axial direction L. The second state switching member 32 has a shape that can be fitted to both the second wheel side engaging portion 42 and the second rotating electrical machine side engaging portion 52 that are formed to have the same diameter. An internal tooth engagement portion that is selectively engaged with the two-wheel side engagement portion 42 and the second rotating electrical machine side engagement portion 52 is formed.

  The second state switching member 32 is configured to be able to select the first position P1, the second position P2, and the third position P3 as the positions in the axial direction L. Here, as shown in FIG. 4, the first position P <b> 1 is a position that engages with the second wheel side engaging portion 42 and separates from the second rotating electrical machine side engaging portion 52. That is, the first position P <b> 1 is a position that engages only with the second wheel side engaging portion 42 among the second wheel side engaging portion 42 and the second rotating electrical machine side engaging portion 52. As shown in FIG. 3, the second position P <b> 2 is a position that engages with the second rotating electrical machine side engaging portion 52 and separates from the second wheel side engaging portion 42. That is, the second position P <b> 2 is a position that engages only with the second rotating electrical machine side engaging portion 52 among the second wheel side engaging portion 42 and the second rotating electrical machine side engaging portion 52. Both of the first position P1 and the second position P2 are unconnected positions for disengaging between the second wheel side engaging portion 42 and the second rotating electrical machine side engaging portion 52. That is, the second state switching member 32 is configured to be able to select two positions, the first position P1 and the second position P2, as the unconnected positions. Here, the “non-connected state” is a state in which the connection between the two target rotating members is released and the driving force is not transmitted between the two rotating members.

  On the other hand, as shown in FIG. 2, the third position P <b> 3 is a position that engages with both the second wheel side engaging portion 42 and the second rotating electrical machine side engaging portion 52. That is, the third position P3 is a connecting position for connecting the second wheel side engaging portion 42 and the second rotating electrical machine side engaging portion 52 to each other. Here, the “connected state” is a state in which the connection between the two target rotating members is maintained and the driving force is transmitted between the two rotating members. That is, in the “connected state”, the two target rotating members are rotated in conjunction with each other, and in this example, the second wheel side engaging portion 42 and the second rotating electrical machine side engaging portion 52 are integrally rotated. It becomes a state to do. In this specification, the state (engagement state) of the second engagement device 22 is the state of connection between the second wheel side engagement part 42 and the second rotating electrical machine side engagement part 52 (connection). State or unconnected state).

  A groove 32 a that is recessed inward in the radial direction R and extends in the circumferential direction is formed in the outer peripheral portion of the second state switching member 32. The vehicle drive device 1 is provided with a moving mechanism for moving (sliding) the second state switching member 32 in the axial direction L, and a second engaging portion 8b (for example, a slide fork of the moving fork) of the moving mechanism. Claw part) is engaged with the groove part 32a. Then, the position of the second state switching member 32 in the axial direction L is changed to the first position P1, the second position P2, and the second position by moving the second engaging portion 8b in the axial direction L by an actuator provided in the moving mechanism. It is possible to switch between the three positions P3. The second state switching member 32 rotates integrally with the engaging portion of the second engaging device 22 with which the second state switching member 32 is engaged, whereas the second engaging portion 8b is a non-rotating member. Is done. Therefore, when the second state switching member 32 rotates, the groove portion 32a and the second engagement portion 8b slide.

  In the present embodiment, the first engagement device 21 is a meshing engagement device similar to the second engagement device 22, as shown in FIGS. 1 and 2. The first engaging device 21 is provided in a power transmission path between the first rotating electrical machine 11 and the drive gear 10, and the first rotating electrical machine is switched by switching the state of engagement of the first engaging device 21. 11 and the drive gear 10 (wheel 7) are switched.

  The first engagement device 21 is basically configured similarly to the second engagement device 22, and includes a first wheel side engagement portion 41 corresponding to the second wheel side engagement portion 42, and a second rotating electrical machine. A first rotating electrical machine side engaging portion 51 corresponding to the side engaging portion 52 and a first state switching member 31 corresponding to the second state switching member 32 are provided. As shown in FIG. 2, each part constituting the first engagement device 21 generally moves a corresponding part of the second engagement device 22 symmetrically with respect to a plane perpendicular to the axial direction L passing through the drive gear shaft 13. It is arranged at the position. The first rotating electrical machine side engaging portion 51 is formed on the first rotating shaft 71 and rotates integrally with the first rotating electrical machine 11. Further, unlike the second wheel side engaging portion 42, the first wheel side engaging portion 41 is formed not on the outer shaft 15 of the drive gear shaft 13 but on the middle shaft 14. Specifically, the middle shaft 14 includes a flange portion at an end portion on the first axial direction L1 side, and a first wheel side engagement portion 41 is formed on the outer peripheral portion of the flange portion.

  The first state switching member 31 is engaged with both the first wheel side engaging portion 41 and the first rotating electrical machine side engaging portion 51 as a position in the axial direction L (position shown in FIG. 2). A position (not shown) that engages with the first rotating electrical machine side engaging portion 51 and separates from the first wheel side engaging portion 41 can be selected. The former position is a connection position for connecting the first wheel side engagement part 41 and the first rotating electrical machine side engagement part 51, and the latter position is the second wheel side engagement part. It is a non-connection position for making the connection between 42 and the second rotating electrical machine side engagement portion 52 into a non-connection state. In this specification, the state (engagement state) of the first engagement device 21 is the state of connection between the first wheel side engagement portion 41 and the first rotating electrical machine side engagement portion 51 (connection). State or unconnected state).

  The first engaging portion 8a of the moving mechanism is engaged with the outer peripheral portion of the first state switching member 31, and the first engaging portion 8a is moved in the axial direction L by an actuator provided in the moving mechanism. The position in the axial direction L of the first state switching member 31 can be switched between a connected position and a non-connected position. The moving mechanism is configured to be able to operate the first engaging portion 8a and the second engaging portion 8b independently of each other, and the engagement state of the first engaging device 21 and the second engaging device 22 are engaged. Can be switched independently of each other.

3. Configuration of Control Device The vehicle drive device 1 includes a control device 30 that controls at least the second engagement device 22. In the present embodiment, the control device 30 is configured to control the first rotating electrical machine 11, the second rotating electrical machine 12, and the first engaging device 21 in addition to the second engaging device 22. Specifically, as illustrated in FIG. 5, the control device 30 includes a rotating electrical machine control unit 33, a predicted rotation speed acquisition unit 34, and an engagement device control unit 35. The control device 30 includes an arithmetic processing device such as a CPU as a core and a storage device such as a RAM and a ROM. Each functional unit of the control device 30 is configured by software (program) stored in a ROM or the like, hardware such as a separately provided arithmetic circuit, or both. Each of these functional units is configured to exchange information with each other.

  The control device 30 is configured to be able to acquire information from sensors and the like provided in each part of the vehicle in order to acquire information of each part of the vehicle on which the vehicle drive device 1 is mounted. Specifically, as shown in FIG. 5, the control device 30 can acquire information from the first rotation speed sensor Se1, the second rotation speed sensor Se2, the air conditioner state sensor Se3, and the accelerator opening sensor Se4. It is configured.

  The first rotation speed sensor Se <b> 1 is a sensor that detects the rotation speed of the second wheel side engagement portion 42. Specifically, the first rotation speed sensor Se1 is a drive gear 10 that rotates integrally with the second wheel side engagement portion 42, or a rotation member that rotates in conjunction with the drive gear 10 at a constant speed ratio (for example, By detecting the rotational speed of the differential input gear device 6 for output), the rotational speed of the second wheel side engaging portion 42 (drive gear 10) is detected directly or indirectly. Since the rotation speed of the drive gear 10 is proportional to the vehicle speed, the control device 30 derives the vehicle speed based on the detection result of the first rotation speed sensor Se1. The second rotational speed sensor Se <b> 2 is a sensor that detects the rotational speed of the second rotating electrical machine side engaging portion 52. Specifically, the second rotational speed sensor Se2 rotates in conjunction with the second rotating shaft 72 that rotates integrally with the second rotating electrical machine side engaging portion 52, or always at a constant speed ratio with the second rotating shaft 72. By detecting the rotational speed of the rotating member (for example, the compressor connecting shaft 73), the rotational speed of the second rotating electrical machine side engaging portion 52 (second rotating shaft 72) is detected directly or indirectly. In the present embodiment, a rotation sensor (such as a resolver) provided in the second rotating electrical machine 12 is used as the second rotation speed sensor Se2. The accelerator opening sensor Se4 is a sensor that detects the accelerator opening by detecting an operation amount of an accelerator pedal (not shown) by the driver.

  The air conditioner state sensor Se3 is a sensor that detects the state (driving state) of the air conditioner selected by the driver's operation or the like. In the present embodiment, the control device 30 is based on the detection result of the air conditioner state sensor Se3, and the state of the air conditioner requires a drive of the compressor 9 (hereinafter referred to as “first state”). Then, it is determined whether the compressor 9 is not required to be driven (hereinafter referred to as “second state”). That is, in the second state, since the compressor 9 does not need to be driven, the compressor 9 is not driven. The second state includes a state where the air conditioner is operating but is simply blowing air. Moreover, when the state of the air conditioner is the first state, the control device 30 acquires the target rotational speed of the compressor 9 based on the detection result of the air conditioner state sensor Se3.

  The control device 30 determines a required vehicle torque required for the driving force source (in this example, the first rotating electrical machine 11 and the second rotating electrical machine 12) from the vehicle side, and based on the determined vehicle required torque, the rotating electrical machine 11 and 12 are controlled. Here, the vehicle required torque includes torque for driving the compressor 9 in addition to torque transmitted to the wheels 7. In the present embodiment, the control device 30 controls the first rotating electrical machine 11 and the second rotating electrical machine 12 based on the accelerator opening degree, the vehicle speed, the state of the air conditioner, the state of the power storage device 39 (the amount of stored power, the temperature, and the like). Output torque (target torque) required for each of the first engagement device 21 and the second engagement device 22 is determined in consideration of the energy efficiency of the vehicle. To do. That is, for each of the first engagement device 21 and the second engagement device 22, the control device 30 determines whether or not the condition for switching to the non-connected state is established when it is in the connected state, If it is, it is determined whether or not the condition for switching to the connected state is satisfied.

3-1. Configuration of Rotating Electric Machine Control Unit The rotating electric machine control unit 33 is a functional unit that controls the first rotating electric machine 11 and the second rotating electric machine 12 based on the vehicle required torque described above. As shown in FIG. 5, the first rotating electrical machine 11 is electrically connected to a power storage device 39 (for example, a battery or a capacitor) via a first inverter 37, and the second rotating electrical machine 12 is connected to the second inverter It is electrically connected to the power storage device 39 via 38. The rotating electrical machine control unit 33 controls the operating point (output torque and rotational speed) of the first rotating electrical machine 11 by controlling the first inverter 37, and controls the second inverter 38 by controlling the second inverter 38. Control the operating point. Specifically, the rotating electrical machine control unit 33 controls the first rotating electrical machine 11 and the second rotating electrical machine 12 by torque control for adjusting the output torque to the target torque or rotational speed control for adjusting the rotational speed to the target rotational speed. Do.

3-2. Configuration of Predicted Rotational Speed Acquisition Unit The predicted rotational speed acquisition unit 34 is configured so that the rotational speed of the second wheel side engaging unit 42 (that is, the predicted rotational speed) and the second rotating electrical machine side engaging unit 52 at a time earlier than the present time. It is a functional unit that acquires a rotation speed (that is, a predicted rotation speed). The predicted rotation speed acquisition unit 34 performs the predicted rotation after switching the second engagement device 22 to the unconnected state when a switching condition for switching the second engagement device 22 from the connected state to the unconnected state is satisfied. Get speed. The predicted rotation speed acquisition unit 34 also acquires the predicted rotation speed when the second engagement device 22 is in a disconnected state, in other words, when the second engagement device 22 is in a disconnected state. In the present embodiment, the predicted rotational speed acquisition unit 34 derives and acquires the predicted rotational speed based on information on each part of the vehicle input to the control device 30. The predicted rotation speed acquired by the predicted rotation speed acquisition unit 34 is used for controlling the second engagement device 22 by the engagement device control unit 35 described later. Note that the predicted rotational speed at a time point before the present time can be an instantaneous value (instantaneous value) or a time average value.

  Here, in this embodiment, since the rotational speed of the second wheel side engaging portion 42 is determined according to the vehicle speed, the predicted rotational speed of the second wheel side engaging portion 42 is various methods for predicting the transition of the vehicle speed. It is possible to obtain based on For example, the vehicle required torque (specifically, the target torque of the first rotating electrical machine 11 and the second rotating electrical machine 12 determined based on the vehicle required torque), the transition of the vehicle speed up to the present, and the road gradient Based on any one or a combination of two or more and the current vehicle speed, the predicted rotational speed of the second wheel side engaging portion 42 can be derived. In the present embodiment, the predicted rotational speed acquisition unit 34 derives the predicted rotational speed of the second wheel side engagement unit 42 based on the target torque of the first rotating electrical machine 11 and the current vehicle speed.

  In the present embodiment, the second rotating electrical machine 12 is used to drive the compressor 9 when the second engagement device 22 is in the disconnected state. Therefore, in this embodiment, the rotational speed of the second rotating electrical machine side engaging portion 52 in the non-connected state of the second engaging device 22 is zero when the state of the air conditioner is in the second state. When the air conditioner is in the first state, control is performed so as to match the target rotational speed of the compressor 9 (compressor drive shaft). Therefore, in the present embodiment, the predicted rotational speed acquisition unit 34 determines whether the second rotating electrical machine is based on the state of the air conditioner (which is the first state or the second state) and the target rotational speed of the compressor 9. A predicted rotation speed of the side engagement portion 52 is derived. The target rotational speed of the compressor 9 is determined with reference to, for example, a map or the like according to the output required for the air conditioner set based on the set temperature, the set air volume, the outside air temperature, the temperature in the passenger compartment, and the like. Is done. When the air conditioner is in the first state and the target rotational speed of the compressor 9 is fixed to a predetermined value, the predicted rotational speed of the second rotating electrical machine side engaging portion 52 is determined by the air conditioner. It can be set as the structure derived | led-out based only on a state (it is any of a 1st state and a 2nd state).

3-3. Configuration of Engagement Device Control Unit The engagement device control unit 35 is a functional unit that performs operation control of the first engagement device 21 and the second engagement device 22. As described above, the engagement state to be realized by each of the engagement devices 21 and 22 is determined together with the vehicle required torque. The first engagement device 21 and the second engagement device 22 are configured to be able to switch the state of engagement by a moving mechanism that changes the positions of the first engagement portion 8a and the second engagement portion 8b. Yes. Therefore, the engagement device control unit 35 switches the engagement state of the first engagement device 21 and the second engagement device 22 by issuing a switching command to the moving mechanism.

  Here, the position (non-connected position) of the second state switching member 32 for setting the state of the second engagement device 22 to the non-connected state can be selected from two positions, the first position P1 and the second position P2. It is. In the present embodiment, the control device 30 is configured such that the rotation speed of the second wheel side engagement portion 42 is lower than the rotation speed of the second rotating electrical machine side engagement portion 52 when the second engagement device 22 is disconnected. In this case, when the second state switching member 32 is located at the first position P1, and the rotation speed of the second rotating electrical machine side engaging portion 52 is lower than the rotation speed of the second wheel side engaging portion 42, the second state is changed. The position of the second state switching member 32 is controlled so that the switching member 32 is positioned at the second position P2. In order to realize such a configuration, the engagement device control unit 35 includes a non-connection position selection unit 36 described below and is configured to execute non-connection position switching control described later.

  The unconnected position selection unit 36 is a functional unit that selects the unconnected position from the first position P1 and the second position P2 when the state of the second engagement device 22 is switched from the connected state to the unconnected state. is there. Specifically, the unconnected position selection unit 36 determines the predicted rotation speed of the second wheel side engagement unit 42 acquired by the predicted rotation speed acquisition unit 34 and the predicted rotation speed of the second rotating electrical machine side engagement unit 52. Based on this, the magnitude relationship between the predicted rotational speed of the second wheel side engaging portion 42 and the predicted rotational speed of the second rotating electrical machine side engaging portion 52 after the second engaging device 22 is switched to the non-connected state is determined. Do. Here, “after switching to the non-connected state” can be immediately after the switching, but when there is a transition time in which the magnitude relationship is temporarily switched, it is preferable to be immediately after the end of the transition time. .

  When the predicted rotational speed of the second wheel side engaging section 42 is lower than the predicted rotational speed of the second rotating electrical machine side engaging section 52, the unconnected position selecting section 36 selects the first position P1, When the predicted rotational speed of the two-rotary electric machine side engaging portion 52 is lower than the predicted rotational speed of the second wheel side engaging portion 42, the second position P2 is selected. When the predicted rotation speed of the second wheel side engagement unit 42 acquired by the predicted rotation speed acquisition unit 34 and the predicted rotation speed of the second rotating electrical machine side engagement unit 52 are the same value, the predicted rotation speed It can be set as the structure which the acquisition part 34 acquires the predicted rotational speed of the further previous time, and compares a magnitude relationship.

  In the present embodiment, as described above, when the second engagement device 22 is in the non-connected state, the rotation speed of the second rotating electrical machine side engaging portion 52 is as follows when the air conditioner is in the second state. It is controlled to be zero. Therefore, when the state of the air conditioner is the second state, the rotational speed of the second rotating electrical machine side engaging portion 52 after switching the second engagement device 22 to the non-connected state is basically: The rotational speed of the second wheel side engaging portion 42 proportional to the vehicle speed is not exceeded. In view of this point, in this embodiment, when the state of the second engagement device 22 is switched from the connected state to the non-connected state, the unconnected position selection unit 36 does not require the compressor 9 to drive the air conditioner. In the second state, the second position P2 is selected without determining the magnitude relationship.

  In addition, the engagement device control unit 35 has a magnitude relationship between the rotation speed of the second wheel side engagement unit 42 and the rotation speed of the second rotating electrical machine side engagement unit 52 when the second engagement device 22 is not connected. In the synchronized state where the rotational speed difference between the rotational speed of the second wheel side engaging portion 42 and the rotational speed of the second rotating electrical machine side engaging portion 52 is less than the differential rotation threshold. The unconnected position switching control is performed to switch the position of the two-state switching member 32 between the first position P1 and the second position P2. That is, in the unconnected position switching process by the unconnected position switching control, when the second state switching member 32 is currently positioned at the first position P1, the position of the second state switching member 32 is switched to the second position P2. When the second state switching member 32 is currently located at the second position P2, the position of the second state switching member 32 is switched to the first position P1. Here, the engagement device control unit 35 determines whether or not the synchronization state is established based on the detection results of both the first rotation speed sensor Se1 and the second rotation speed sensor Se2. The differential rotation threshold value for determining the synchronization state is a preset threshold value (predetermined threshold value), and can be set to a value of 10 rpm to 100 rpm, for example. Note that the differential rotation threshold value is not set to a fixed value, but may be configured to be variably set according to factors such as the vehicle speed.

  The engagement device control unit 35 is based on the predicted rotation speed of the second wheel side engagement unit 42 acquired by the predicted rotation speed acquisition unit 34 and the predicted rotation speed of the second rotating electrical machine side engagement unit 52. It is predicted whether or not the magnitude relationship between the rotational speed of the two-wheel side engaging portion 42 and the rotational speed of the second rotating electrical machine-side engaging portion 52 is reversed. Such a reversal of the magnitude relationship is, for example, when the vehicle is accelerated when the air conditioner is in the first state, or when the air conditioner is moving from the first state to the second state while the vehicle is running. This can happen when the When the magnitude-reversal reversal is predicted, the engagement device control unit 35 waits until the second wheel side engagement unit 42 and the second rotating electrical machine side engagement unit 52 are in a synchronized state, that is, The second engagement device 22 waits until it is in a synchronized state, and the above-described unconnected position switching control is executed on condition that the synchronized state is reached.

  Note that the engagement device control unit 35 is configured to interrupt the execution of the unconnected position switching process including the standby process for waiting for the synchronization state when the prediction changes after the magnitude reversal is predicted. ing. In addition, the second state switching member in the second wheel side engaging portion 42 and the second rotating electrical machine side engaging portion 52 after the reverse of the magnitude relationship due to erroneous determination in the previous control, execution of exception processing, or the like. There may be a case where the rotational speed of the engaging part to which 32 is currently engaged is lower than that of the other engaging part. Even in such a case, the engagement device control unit 35 is configured to interrupt the execution of the unconnected position switching process.

4). Procedure of Second Engagement Device Control Process Next, the procedure of the second engagement device control process according to the present embodiment will be described with reference to the flowcharts of FIGS. FIG. 6 is a flowchart showing the entire procedure of the second engagement device control process executed by the control device 30. FIG. 7 is a flowchart showing the processing procedure of the connected state determination process in step # 03 of FIG. FIG. 8 is a flowchart showing a processing procedure of the determination process in the disconnected state in step # 04 in FIG. Each processing procedure described below is executed by each functional unit of the control device 30. When each functional unit is configured by a program, the arithmetic processing device included in the control device 30 operates as a computer that executes the program that configures each functional unit described above.

4-1. Overall Procedure of Second Engagement Device Control Process As shown in FIG. 6, after the vehicle starts (Step # 01: Yes), until the vehicle stops (Step # 05: Yes), Step # 02 The process starting from is repeatedly executed. In the process of step # 02, it is determined whether or not the second engagement device 22 is in a connected state. If the second engagement device 22 is in a connected state (step # 02: Yes), When the connected state determination process (step # 03) is executed and the second engagement device 22 is in the disconnected state (step # 02: No), the disconnected state determination process (step # 04) is executed. Is done. Details of the determination process at the time of connected state and the determination process at the time of non-connected state will be described later.

  Until the vehicle stops (step # 05: No), the process starting from step # 02 is repeatedly executed. When the vehicle stops (step # 05: Yes), the first of the second state switching member 32 is set. Switching processing to the position P1 is executed. In addition, when the 2nd state switching member 32 is located in the 1st position P1 at the time of a vehicle stopping, the state is maintained. Thus, in the present embodiment, when the vehicle stops, the switching process of the second state switching member 32 to the first position P1 is executed. Therefore, in the state before the vehicle starts, basically the second state switching is performed. The member 32 is located at the first position P1, and the second engagement device 22 is in a non-connected state.

  Then, at the time of start of the vehicle, it is determined whether or not the second engagement device 22 is switched to the connected state, and when the condition for switching to the connected state is satisfied, the position of the second state switching member 32 is determined. Is switched to the connecting position (third position P3) to start the vehicle. On the other hand, when the switching condition to the connected state is not satisfied, the predicted rotational speed of the second wheel side engaging portion 42 and the predicted rotational speed of the second rotating electrical machine side engaging portion 52 are acquired and predicted. A process of engaging the second state switching member 32 with the engaging portion with the lower rotational speed is executed. Thereby, for example, when the state of the air conditioner is the first state when the vehicle starts, the rotation speed of the second wheel side engaging portion 42 is set to the second rotating electrical machine side for at least a predetermined period after the vehicle starts. Since it becomes lower than the rotational speed of the engaging part 52, the vehicle is started with the position of the second state switching member 32 maintained at the first position P1. On the other hand, when the air conditioner is in the second state when the vehicle starts, the rotation speed of the second rotating electrical machine side engaging portion 52 is set to the second wheel side engaging portion for at least a predetermined period after the vehicle starts. Since the rotational speed is lower than 42, the vehicle is started after the position of the second state switching member 32 is switched to the second position P2.

4-2. Next, the connected state determination process in step # 03 of FIG. 6 will be described with reference to FIG. First, it is determined whether or not the condition for switching the second engagement device 22 to the unconnected state is satisfied (step # 11), and when the condition for switching is satisfied (step # 11: Yes). ), The processes after step # 12 are sequentially executed, and the second engagement device 22 is switched to the non-connected state. On the other hand, when the condition for switching the second engagement device 22 to the non-connected state is not satisfied (step # 11: No), the determination process at the time of the connected state ends.

  When the condition for switching the second engagement device 22 to the non-connected state is satisfied (step # 11: Yes), the selection process of the non-connected position is executed. First, it is determined whether or not the air conditioner is in the second state (step # 12). If the air conditioner is in the second state (step # 12: Yes), non-conditioning is performed. The second position P2 is selected as the connection position (step # 15). On the other hand, when the state of the air conditioner is not the second state (step # 12: No), that is, when it is the first state, the second engagement device 22 after switching to the non-connected state The predicted rotational speed of the wheel side engaging portion 42 and the predicted rotational speed of the second rotating electrical machine side engaging portion 52 are acquired, and the magnitude relation determination in step # 13 is executed based on the two acquired predicted rotational speeds. To do.

  If it is determined in step # 13 that the predicted rotational speed of the second wheel side engaging portion 42 is lower than the predicted rotational speed of the second rotating electrical machine side engaging portion 52 (step # 13: Yes), When the first position P1 is selected as the unconnected position (step # 14), and it is determined that the predicted rotational speed of the second rotating electrical machine side engaging portion 52 is lower than the predicted rotational speed of the second wheel side engaging portion 42 (Step # 13: No), the second position P2 is selected as the unconnected position (Step # 15). In addition, although illustration is abbreviate | omitted, when the estimated rotational speed of the 2nd wheel side engaging part 42 and the estimated rotational speed of the 2nd rotary electric machine side engaging part 52 are equal, a difference arises in an estimated rotational speed. Until then, the predicted rotational speed at a further earlier time point is acquired and the magnitude relation is compared. In step # 16, the position of the second state switching member 32 is switched to the unconnected position selected in step # 14 or step # 15, so that the state of the second engagement device 22 is changed from the connected state to the non-connected position. Switch to connected state.

4-3. Unconnected State Determination Process Next, the unconnected state determination process of Step # 04 in FIG. 6 will be described with reference to FIG. First, it is determined whether or not a condition for switching to the connected state of the second engagement device 22 is satisfied (step # 21), and when the condition for switching is satisfied (step # 21: Yes). Then, a process for switching the second engagement device 22 to the connected state is executed (step # 25), and the determination process in the unconnected state ends. In the switching process to the connected state, the rotational speed of the second rotating electrical machine 12 is controlled so that the rotational speed of the second rotating electrical machine side engaging portion 52 approaches the rotational speed of the second wheel side engaging portion 42. After that, the position of the second state switching member 32 is switched from the non-connection position (first position P1 or second position P2) to the connection position (third position P3).

  On the other hand, when the condition for switching to the connected state of the second engagement device 22 is not satisfied (step # 21: No), the predicted rotational speed of the second wheel side engagement portion 42 and the second rotating electrical machine side engagement are determined. The predicted rotational speed of the joint portion 52 is acquired, and the magnitude of the rotational speed of the second wheel side engaging portion 42 and the rotational speed of the second rotating electrical machine side engaging portion 52 based on the two predicted rotational speeds acquired. It is predicted whether or not the relationship is reversed (step # 22). Then, when the reversal of the magnitude relationship is not predicted (step # 22: No), the determination process in the unconnected state ends.

  On the other hand, when reversal of the magnitude relationship is predicted (step # 22: Yes), the process waits until the second engagement device 22 is in a synchronized state (step # 23: No), and the second engagement device 22 When the synchronization state is reached (step # 23: Yes), a non-connected position switching process for switching the position of the second state switching member 32 between the first position P1 and the second position P2 is executed (step # 24). The connected state determination process ends. As described above, even when it is determined Yes in step # 22, the unconnected position switching process is interrupted in a specific case, and the unconnected state determination process is ended.

5. Other Embodiments Finally, other embodiments of the vehicle drive device according to the present invention will be described. Note that the configurations disclosed in the following embodiments can be applied in combination with the configurations disclosed in other embodiments as long as no contradiction arises.

(1) In the above embodiment, when the uncoupled position selector 36 switches the state of the second engagement device 22 from the coupled state to the uncoupled state, the conditioner is in the second state. The second position P2 is selected without determining the magnitude relationship between the predicted rotational speed of the second wheel side engaging portion 42 and the predicted rotational speed of the second rotating electrical machine side engaging portion 52. An example has been described. However, the embodiment of the present invention is not limited to this, and the non-connection position selection unit 36 is also provided when the air conditioner is in the second state, that is, always at the second wheel side engagement unit. It is also possible to determine the magnitude relationship between the predicted rotational speed of 42 and the predicted rotational speed of the second rotating electrical machine side engaging portion 52 to select the unconnected position. Such a configuration is also used, for example, when the second rotating electrical machine 12 drives another auxiliary machine (for example, an oil pump) other than the compressor 9 when the second engagement device 22 is in a disconnected state. It is suitable when used. In addition, when such another auxiliary machine is provided, the predicted rotation speed acquisition unit 34 derives the predicted rotation speed of the second rotating electrical machine side engaging unit 52 in consideration of the state related to the other auxiliary machine. It is preferable to adopt a configuration to do so.

(2) In the above embodiment, the engagement device control unit 35 is configured so that the rotation speed of the second wheel side engagement unit 42 and the second rotating electrical machine side engagement unit 52 are in the disconnected state of the second engagement device 22. In the case where the magnitude relationship with the rotational speed of the reverse is reversed, the position of the second state switching member 32 in a state where the second wheel side engaging portion 42 and the second rotating electrical machine side engaging portion 52 are in a synchronized state. As an example, the case where the unconnected position switching control for switching between the first position P1 and the second position P2 is executed has been described. However, the embodiment of the present invention is not limited to this, and the position of the second state switching member 32 in the non-connected state of the second engagement device 22 is selected as the non-connected position when switching to the non-connected state. A configuration in which the position selected by the unit 36 is maintained is also possible. That is, the control device 30 is configured so that the rotation speed of the second wheel side engagement portion 42 is not engaged in the second rotating electrical machine side engagement in at least a part of the period, not in the entire period in which the second engagement device 22 is not connected. When the rotational speed of the part 52 is lower, the second state switching member 32 is positioned at the first position P1, and the rotational speed of the second rotating electrical machine side engaging part 52 is higher than the rotational speed of the second wheel side engaging part 42. When it is low, the position of the second state switching member 32 can be controlled so that the second state switching member 32 is positioned at the second position P2.

(3) In the above embodiment, the configuration in which the compressor connecting shaft 73 is drivingly connected to the compressor driving shaft so as to rotate integrally with the compressor driving shaft has been described as an example. However, the embodiment of the present invention is not limited to this, and the state of engagement between these two rotary shafts can be changed in the power transmission path between the compressor connecting shaft 73 and the compressor drive shaft. An engaging device (for example, an electromagnetic clutch or the like) is arranged, and the compressor connecting shaft 73 and the compressor driving shaft can be connected only when the compressor 9 is driven. Such a configuration is suitable, for example, when the second rotating electrical machine 12 is also used to drive another auxiliary machine (for example, an oil pump or the like) other than the compressor 9.

(4) In the above embodiment, the configuration in which both the second wheel side engaging portion 42 and the second rotating electrical machine side engaging portion 52 are external tooth engaging portions has been described as an example. However, the embodiment of the present invention is not limited to this, and at least one of the second wheel side engaging portion 42 and the second rotating electrical machine side engaging portion 52 is an internal tooth engaging portion. The two-state switching member 32 may have an external tooth engaging portion.

(5) In the above embodiment, the configuration in which the first engagement device 21 is a meshing engagement device has been described as an example. However, the embodiment of the present invention is not limited to this, and the first engagement device 21 may be a friction engagement device. The first engagement device 21 may be a one-way engagement device (one-way clutch) that transmits torque only in one direction and idles in the opposite direction and does not transmit torque.

(6) In the above embodiment, the configuration in which the first rotating electrical machine 11 is drivingly connected to the driving gear 10 via the first engagement device 21 has been described as an example. However, the embodiment of the present invention is not limited to this, and the first rotating electrical machine 11 can be driven and connected to the drive gear 10 without an engagement device. In this case, for example, the first rotating electrical machine 11 and the drive gear 10 can be configured to rotate integrally.

(7) In the above embodiment, the first rotating shaft 71 rotates integrally with the first rotating electrical machine side engaging portion 51, and the second rotating shaft 72 rotates integrally with the second rotating electrical machine side engaging portion 52. Described as an example. However, the embodiment of the present invention is not limited to this, and includes a speed change mechanism (for example, a speed reduction mechanism) that changes the speed of the rotation of the first rotating shaft 71 and transmits it to the first rotating electrical machine side engaging portion 51. It is also possible to employ a configuration or a configuration including a speed change mechanism (for example, a speed reduction mechanism) that changes the speed of rotation of the second rotary shaft 72 and transmits it to the second rotating electrical machine side engaging portion 52.

(8) In the above embodiment, as the first rotating electrical machine 11 and the second rotating electrical machine 12, the upper limit value of the torque that can be output is larger than the second rotating electrical machine 12, and the torque can be output. The upper limit value of the rotational speed has been described as an example where the second rotating electrical machine 12 is larger than the first rotating electrical machine 11. However, the embodiment of the present invention is not limited to this, and the upper limit value of the torque that can be output is such that the second rotating electrical machine 12 is larger than the first rotating electrical machine 11 or the rotational speed at which torque can be output. Regarding the upper limit value, the first rotating electrical machine 11 may be configured to be larger than the second rotating electrical machine 12.

(9) In the above embodiment, the drive gear shaft 13 that is the rotation shaft of the drive gear 10 includes a plurality of members (specifically, the middle shaft 14, the outer shaft 15, and the engaging portion forming member 16). The configuration has been described as an example. However, the embodiment of the present invention is not limited to this, and the drive gear shaft 13 formed by a single member can be used.

(10) In the above embodiment, the configuration in which the vehicle drive device 1 includes the counter gear mechanism 5 has been described as an example. However, the embodiment of the present invention is not limited to this, and the vehicle drive device 1 does not include the counter gear mechanism 5 and the drive gear 10 is directly drive-coupled to the output differential gear device 6. That is, the drive gear 10 and the gear (differential input gear) included in the output differential gear device 6 can be directly meshed with each other.

(11) Regarding other configurations as well, the embodiments disclosed herein are illustrative in all respects, and embodiments of the present invention are not limited thereto. In other words, configurations that are not described in the claims of the present application can be modified as appropriate without departing from the object of the present invention.

  The present invention is suitable for a vehicle drive device that includes a first rotating electrical machine that is drivingly connected to a wheel, an engagement device, and a second rotating electrical machine that is driven and connected to the wheel via the engagement device. Can be used.

1: Vehicle drive device 7: Wheel 9: Compressor 11: First rotating electrical machine 12: Second rotating electrical machine 22: Second engaging device (engaging device)
30: Control device 32: Second state switching member (state switching member)
35: Non-connection position selection part 42: Second wheel side engagement part (wheel side engagement part)
52: Second rotating electrical machine side engaging portion (rotating electrical machine side engaging portion)
73: Compressor connecting shaft (compressor connecting member)
P1: First position P2: Second position

Claims (5)

A first rotating electrical machine that is drivingly connected to the wheel, an engagement device, a second rotating electrical machine that is driven and connected to the wheel via the engaging device, and a compressor connection that is drivingly connected to the compressor for the air conditioner A vehicle drive device comprising: a member;
The second rotating electrical machine is disposed in a power transmission path between the engagement device and the compressor connecting member,
The engaging device includes a wheel side engaging portion that is drivingly connected to the wheel, a rotating electrical machine side engaging portion that is drivingly connected to the second rotating electrical machine, the wheel side engaging portion, and the rotating electrical machine side engagement. A state switching member that selectively engages at least one of the joints to switch the state of the engagement device, and a meshing engagement device.
The state switching member is engaged with the wheel side engaging portion as a non-connected position for making a non-connected state between the wheel side engaging portion and the rotating electric machine side engaging portion. A vehicle drive device configured to be selectable between a first position separated from the side engaging portion and a second position engaged with the rotating electrical machine side engaging portion and separated from the wheel side engaging portion. . A control device for controlling the engagement device;
When the control device switches the state of the engagement device from a connected state in which the wheel side engaging portion and the rotating electrical machine side engaging portion are connected to the non-connected state, the control device changes the non-connected position to the first position. A non-connected position selection unit for selecting from one position and the second position;
The non-connection position selection unit determines a magnitude relationship between the predicted rotation speed of the wheel-side engagement unit and the predicted rotation speed of the rotating electrical machine-side engagement unit after the engagement device is switched to the non-connection state. When the predicted rotational speed of the wheel side engaging portion is lower than the predicted rotational speed of the rotating electrical machine side engaging portion, the first position is selected, and the predicted rotational speed of the rotating electrical machine side engaging portion is 2. The vehicle drive device according to claim 1, wherein the second position is selected when the rotation speed is lower than a predicted rotation speed of the wheel-side engagement portion.   3. The non-connection position selection unit according to claim 2, wherein when the state of the air conditioner is a state that does not require driving of the compressor, the non-connection position selection unit selects the second position without determining the magnitude relationship. Vehicle drive system.   In the non-connected state of the engagement device, when the magnitude relationship between the rotation speed of the wheel side engagement portion and the rotation speed of the rotating electrical machine side engagement portion is reversed, the control device In a synchronous state where the rotational speed difference between the rotational speed of the engaging portion and the rotational speed of the rotating electrical machine side engaging portion is less than the differential rotation threshold, the position of the state switching member is set to the first position and the second position. The vehicle drive device according to claim 2 or 3, wherein unconnected position switching control for switching between positions is performed.   When the rotational speed of the wheel side engaging portion is lower than the rotational speed of the rotating electrical machine side engaging portion in the non-coupled state of the engaging device, the state switching member is moved to the first position. The position of the state switching member is such that the state switching member is positioned at the second position when the rotational speed of the rotating electrical machine side engaging portion is lower than the rotational speed of the wheel side engaging portion. The vehicle drive device according to claim 4, wherein the vehicle drive device is controlled.

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