WO2022025055A1

WO2022025055A1 - Control device

Info

Publication number: WO2022025055A1
Application number: PCT/JP2021/027735
Authority: WO
Inventors: 田中将之
Original assignee: 株式会社アイシン
Priority date: 2020-07-27
Filing date: 2021-07-27
Publication date: 2022-02-03

Abstract

When starting advance of a vehicle in a state in which a first engaging device is released, a control device executes first engaging control and second engaging control, and rotationally drives an output member by torque transmitted to the output member from an input member via the first engaging device or a second engaging device. The second engaging control is control in which the second engaging device is placed in a semi-engaged state until the first engaging device is engaged, and the first engaging control is control to continuously execute engaging operations to engage the first engaging device until the first engaging device is engaged.

Description

Control device

In the present invention, the first shift stage is formed with the meshing type first engaging device engaged and the friction type second engaging device released, and the meshing type first engaging device is released and released. The present invention relates to a control device for controlling a vehicle drive transmission device including a transmission that forms a second shift stage having a gear ratio smaller than that of the first shift stage in a state where the friction type second engagement device is engaged.

An example of the control device as described above is disclosed in International Publication No. 2014/103572 (Patent Document 1). Hereinafter, the reference numerals shown in parentheses in the description of the background art are those of Patent Document 1. In Patent Document 1, the automatic transmission (3) has a low gear stage (1st speed) having a large reduction ratio in a state where the meshing type engagement clutch (8c) is engaged and the friction type friction clutch (9c) is released. The stage) is formed, and the high gear stage (second speed stage) having a small reduction ratio is formed in a state where the engagement clutch (8c) is released and the friction clutch (9c) is engaged. Further, in paragraphs 0075-0076 and FIG. 8 of Patent Document 1, when the speed change controller (21) for controlling the automatic transmission (3) cannot engage the engagement clutch (8c), the friction clutch (9c) is used. It is described that the vehicle is engaged and the vehicle is started in 2nd speed. Further, in paragraph 0080 and FIG. 9 of Patent Document 1, the speed change controller (21) performs a down shift by releasing the friction clutch (9c) and engaging the engagement clutch (8c) at the time of starting in the second speed as described above. , It is described that it is performed in response to the accelerator depression operation.

International Publication No. 2014/103572

As described above, the control device of Patent Document 1 uses a friction type second engaging device instead of the first engaging device when the meshing type first engaging device cannot be engaged when the vehicle starts. By engaging, the vehicle is configured to start at the second shift stage. When the vehicle is started in the second shift instead of the first shift in this way, the shift from the second shift to the first shift (downshift) is performed in order to easily secure the required driving force. ) It is desirable to be able to do it quickly. However, although Patent Document 1 describes that when the vehicle starts in the second shift stage, the shift is performed from the second shift stage to the first shift stage in response to the accelerator depression operation. There is no description of the technology for doing this quickly.

Therefore, it is desired to realize a technology capable of quickly shifting from the second gear to the first gear when the vehicle is started in the second gear instead of the first gear.

The control device according to the present disclosure includes an input member that is driven and connected to a rotary electric machine, an output member that is driven and connected to a wheel, and a meshing type first engaging device and a friction type second engaging device. A transmission arranged in a power transmission path between the input member and the output member is provided, and the transmission is engaged with the first engaging device and released by the second engaging device. A vehicle that forms a first gear in a state, and forms a second gear having a gear ratio smaller than that of the first gear in a state where the first engaging device is released and the second engaging device is engaged. When the vehicle is a control device to be controlled and the vehicle on which the vehicle drive transmission device is mounted is started in a state where the first engagement device is released, the first engagement control and The second engagement control is executed, and the output member is rotationally driven by the torque transmitted from the input member to the output member via the first engagement device or the second engagement device, and the second engagement member is driven. The engagement control is a control in which the second engagement device is in a semi-engaged state until the first engagement device is engaged, and the first engagement control is the control in which the first engagement device is in a semi-engaged state. It is a control for continuously executing an engaging operation for engaging the first engaging device until the first engaging device is engaged.

According to this configuration, when the vehicle is started, the control device executes the first engagement control and the second engagement control, so that the start timing of the first engagement control and the start timing of the second engagement control If the first engaging device is not engaged at the start of the second engaging control, the second engaging device is put into a semi-engaged state by executing the second engaging control regardless of the front-back relationship of the above. As a result, the vehicle can be started at the second shift stage instead of the first shift stage. This makes it possible to quickly start the vehicle even when the first engaging device cannot be engaged, for example, because the teeth are in phase with each other (that is, the teeth are in contact with each other). ing.

In this configuration, during the execution of the first engagement control and the second engagement control, the first engagement device is controlled in a semi-engaged state instead of a fully engaged state. The engagement operation for engaging the is continuously performed. Therefore, even if the first engaging device cannot be engaged at the start of the first engaging control, the engaging operation for engaging the first engaging device is continuously executed. The first engaging device can be engaged by shifting the phase of the teeth by the pushing force acting on the contact portion between the teeth. Therefore, even if the first engagement device cannot be engaged at the start of the first engagement control, the first engagement device is engaged relatively early, and the second engagement control is performed accordingly. By terminating it, it is possible to quickly shift from the second shift stage to the first shift stage. As described above, according to this configuration, when the vehicle is started in the second gear instead of the first gear, it is possible to quickly shift from the second gear to the first gear. It has become.

Further features and advantages of the control device will be clarified from the following description of the embodiments described with reference to the drawings.

Schematic diagram showing an example of a vehicle drive transmission device Schematic diagram showing another example of a vehicle drive transmission device A flowchart showing an example of a control flow executed in a control device. A flowchart showing another example of the control flow executed in the control device. A flowchart showing yet another example of the control flow executed in the control unit. Time chart showing an example of control behavior when the vehicle starts

The embodiment of the control device will be described with reference to the drawings. As used herein, "rotary electric machine" is used as a concept including any of a motor (motor), a generator (generator), and, if necessary, a motor / generator that functions as both a motor and a generator. Further, in the present specification, "driving connection" refers to a state in which two rotating elements are connected so as to be able to transmit a driving force (synonymous with torque), so that the two rotating elements rotate integrally. It includes a state in which the two rotating elements are connected so as to be able to transmit a driving force via one or more transmission members. Such transmission members include various members (for example, shafts, gear mechanisms, belts, chains, etc.) that transmit rotation at the same speed or at different speeds. The transmission member may include an engagement device (for example, a friction engagement device, a meshing engagement device, etc.) that selectively transmits rotation and driving force.

The control device 5 is a control device whose control target is the vehicle drive transmission device 4. FIG. 1 shows an example of a vehicle drive transmission device 4 that can be controlled by the control device 5, and FIG. 2 shows another example. The vehicle drive transmission device 4 to be controlled by the control device 5 is not limited to the vehicle drive transmission device 4 shown in FIGS. 1 and 2, and may be a vehicle drive transmission device 4 having another configuration.

As shown in FIGS. 1 and 2, the vehicle drive transmission device 4 includes an input member 20 that is driven and connected to a rotary electric machine 3, an output member 30 that is driven and connected to a wheel 2, an input member 20, and an output member 30. A transmission 10 arranged in a power transmission path between and is provided. In addition, in FIGS. 1 and 2, the same reference numerals are given to the portions having a common function, and in FIG. 2, a part of the configuration in FIG. 1 is omitted. The driving force source driven and connected to the input member 20 is not limited to the rotary electric machine, and may be another type of driving force source (for example, an internal combustion engine such as a gasoline engine or a diesel engine). Further, the driving force source driven and connected to the input member 20 may be a plurality of driving force sources of the same type or different types.

As shown in FIG. 1, the rotary electric machine 3 is electrically connected to a power storage device 7 such as a battery or a capacitor via an inverter device 6 that converts electric power between DC power and AC power. The rotary electric machine 3 receives power from the power storage device 7 and powers it, or supplies power generated by the inertial force of the vehicle 1 to the power storage device 7 to store the power. As the rotary electric machine 3, an alternating current rotary electric machine driven by a three-phase alternating current (an example of a multi-phase alternating current) can be used.

In the two examples shown in FIGS. 1 and 2, the input member 20 has an output so as to rotate integrally with the output member of the rotary electric machine 3 which is a driving force source (here, the rotor shaft of the rotary electric machine 3). It is connected to the member. Further, in these two examples, the output member 30 is drive-connected to the two wheels 2. Specifically, the output member 30 is connected to two wheels 2 (for example, two front wheels or two rear wheels) via an output differential gear device 31. The output differential gear device 31 includes, for example, a differential gear mechanism such as a bevel gear type or a planetary gear type, and distributes the rotation of the output member 30 functioning as a differential input gear to the two wheels 2. The output member 30 may be driven and connected to one wheel 2 instead of the two wheels 2.

The transmission 10 shifts the rotation of the input member 20 and transmits it to the output member 30. The transmission 10 is configured to be able to change the gear ratio, which is the ratio of the rotational speed of the input member 20 to the rotational speed of the output member 30. The transmission 10 is a stepped automatic transmission capable of forming a plurality of gears having different gear ratios. In the present embodiment, the transmission 10 is a first gear and a second gear having a gear ratio smaller than that of the first gear. And, it is configured to be formable. The transmission 10 includes a first engaging device 11 and a second engaging device 12. Then, the transmission 10 forms the first shift stage in a state where the first engaging device 11 is engaged and the second engaging device 12 is released, and the first engaging device 11 is released and the second engagement is performed. It is configured to form the second shift stage in a state where the coupling device 12 is engaged.

The first engaging device 11 is a meshing type engaging device (dog clutch). The engaged state of the first engaging device 11 is switched between an engaged state and an released state. The engagement state of the first engaging device 11 is switched by an actuator such as an electric actuator, a hydraulic actuator, or an electromagnetic actuator. Specifically, as shown in FIGS. 1 and 2, the first engaging device 11 includes a sleeve member 15 driven in the axial direction by an actuator, and the engagement state of the first engaging device 11 is provided. Is switched according to the axial position of the sleeve member 15. Here, the axial direction is on the axis on which the first engaging device 11 is arranged (the axis in which the intermediate member 40 is arranged in the example shown in FIG. 1 and the axis in which the input member 20 is arranged in the example shown in FIG. 2). The direction is along.

The second engaging device 12 is a friction type engaging device. As the second engaging device 12, for example, a wet multi-plate clutch can be used. The engagement state of the second engagement device 12 is switched between a direct connection engagement state, a sliding engagement state, and an release state. The direct-coupled engagement state includes a completely-engaged state in which a steady direct-coupled engagement state (specifically, a state in which slipping between the engaging members does not occur even if the transmission torque fluctuates). The engagement state of the second engaging device 12 is switched by an actuator such as an electric actuator, a hydraulic actuator (hydraulic servo mechanism or the like), or an electromagnetic actuator. In the direct connection engagement state, torque is transmitted between the engagement members by static friction in a state where there is no difference in rotational speed (slip) between the engagement members of the second engagement device 12. In the sliding engagement state, torque is transmitted between the engagement members by dynamic friction in a state where there is a difference in rotational speed between the engagement members of the second engagement device 12. In the friction type engaging device, the transmitted torque capacity may be generated by dragging between the engaging members even when the control device 5 does not issue a command to generate the transmitted torque capacity. In the present specification, such a drag torque is not considered in classifying the engagement state, and the transmission torque capacity is generated by the drag between the engaging members when a command to generate the transmission torque capacity is not issued. The state (that is, the state in which the drag torque is generated) is defined as the "released state".

In the example shown in FIG. 1, the transmission 10 is a parallel shaft gear type transmission having a configuration in which a plurality of gears arranged on a plurality of parallel shafts mesh with each other. The transmission 10 shown in FIG. 1 has a first input gear 21 and a second input gear 22 arranged coaxially with the input member 20, and a first intermediate gear 41 and a second gear 41 arranged coaxially with the intermediate member 40, respectively. It includes an intermediate gear 42. The intermediate member 40 is arranged on a shaft different from the input member 20 (a shaft parallel to the shaft on which the input member 20 is arranged), and includes a third intermediate gear 43 that meshes with the gears constituting the output member 30. .. The first intermediate gear 41 meshes with the first input gear 21, and the second intermediate gear 42 meshes with the second input gear 22. The gear ratio between the first input gear 21 and the first intermediate gear 41 and the gear ratio between the second input gear 22 and the second intermediate gear 42 are the rotation speed of the first input gear 21 with respect to the rotation speed of the first intermediate gear 41. The ratio of the speeds is set to be larger than the ratio of the rotation speeds of the second input gear 22 to the rotation speeds of the second intermediate gear 42.

In a state where the first engaging device 11 is engaged and the second engaging device 12 is released to form the first shift stage, the input member 20 and the intermediate member 40 are engaged with the first input gear 21 and the first intermediate. It is connected to the gear 41 via a gear pair, and the rotation of the input member 20 is changed according to the gear ratio of the gear pair and transmitted to the intermediate member 40. Further, in a state where the first engaging device 11 is released and the second engaging device 12 is engaged to form the second shift stage, the input member 20 and the intermediate member 40 are the second input gear 22 and the second gear. 2 It is connected to the intermediate gear 42 via a gear pair, and the rotation of the input member 20 is changed according to the gear ratio of the gear pair and transmitted to the intermediate member 40.

In the example shown in FIG. 1, the first input gear 21 and the second input gear 22 are connected to the input member 20 so as to rotate integrally with the input member 20. Then, the first engaging device 11 selectively connects the first intermediate gear 41 and the intermediate member 40, and the second engaging device 12 selectively connects the second intermediate gear 42 and the intermediate member 40. do. The first engaging device 11 is engaged to connect the first intermediate gear 41 and the intermediate member 40, the second engaging device 12 is released, and the connection between the second intermediate gear 42 and the intermediate member 40 is released. In this state, the first gear is formed. Further, the first engaging device 11 is released, the connection between the first intermediate gear 41 and the intermediate member 40 is released, the second engaging device 12 is engaged, and the second intermediate gear 42 and the intermediate member 40 are engaged with each other. The second gear is formed in the connected state.

In the example shown in FIG. 1, the sleeve member 15 is arranged so as to be externally fitted to the third engaging portion 40a that rotates integrally with the intermediate member 40. Specifically, the internal teeth formed on the inner peripheral portion of the sleeve member 15 are restricted from relative rotation to the external teeth formed on the outer peripheral portion of the third engaging portion 40a, and relative movement in the axial direction is permitted. Engage in the form to be (specifically, spline-engaged). Then, the position in the axial direction in which the sleeve member 15 engages with both the third engaging portion 40a and the first engaging portion 41a that rotates integrally with the first intermediate gear 41 (sleeve member shown in FIG. 1). The first engaging device 11 is engaged and the first intermediate gear 41 and the intermediate member 40 are connected in a state of being moved from the position of 15 to the position on the right side in the drawing). In this state, the internal teeth formed on the inner peripheral portion of the sleeve member 15 are the external teeth formed on the outer peripheral portion of the third engaging portion 40a and the external teeth formed on the outer peripheral portion of the first engaging portion 41a. Are engaged in both. Further, in a state where the sleeve member 15 is moved to a position in the axial direction (for example, the position of the sleeve member 15 shown in FIG. 1) that does not engage with the first engaging portion 41a, the first engaging device 11 is released. The connection between the first intermediate gear 41 and the intermediate member 40 is released.

In the example shown in FIG. 1, the transmission 10 further includes a third engaging device 13. The third engaging device 13 is provided in parallel with the second engaging device 12, and selectively connects the second intermediate gear 42 and the intermediate member 40. Therefore, the second shift stage is also formed by engaging the third engaging device 13 instead of the second engaging device 12. The third engaging device 13 is a meshing type engaging device. In the example shown in FIG. 1, the first engaging device 11 and the third engaging device 13 are configured by using a common sleeve member 15, and the engaged state of the third engaging device 13 is the sleeve member. It can be switched according to the axial position of 15. Specifically, the position in the axial direction in which the sleeve member 15 engages with both the third engaging portion 40a and the second engaging portion 42a that rotates integrally with the second intermediate gear 42 (in FIG. 1). The third engaging device 13 is engaged and the second intermediate gear 42 and the intermediate member 40 are connected in a state of being moved from the position of the sleeve member 15 shown (the position on the left side in the drawing). In this state, the internal teeth formed on the inner peripheral portion of the sleeve member 15 are the external teeth formed on the outer peripheral portion of the third engaging portion 40a and the external teeth formed on the outer peripheral portion of the second engaging portion 42a. Are engaged in both. Further, the third engaging device 13 is released in a state where the sleeve member 15 is moved to a position in the axial direction (for example, the position of the sleeve member 15 shown in FIG. 1) that does not engage with the second engaging portion 42a. The connection between the second intermediate gear 42 and the intermediate member 40 is released.

In the example shown in FIG. 2, the transmission 10 is a planetary gear type transmission configured by using one or more planetary gear mechanisms (here, one planetary gear mechanism 50). The planetary gear mechanism 50 is a single pinion type planetary gear mechanism, and includes a sun gear 51, a ring gear 52, and a carrier 54 that rotatably supports a pinion gear 53 that meshes with both the sun gear 51 and the ring gear 52. The ring gear 52 is connected to the input member 20 so as to rotate integrally with the input member 20, and the carrier 54 is connected to the output gear 55 so as to rotate integrally with the output gear 55 that meshes with the gears constituting the output member 30. It is linked.

In the example shown in FIG. 2, the first engaging device 11 selectively fixes the sun gear 51 to the case 9 (an example of a fixing member) of the vehicle drive transmission device 4, and the second engaging device 12 is the sun gear 51. And the carrier 54 are selectively connected. In a state where the first engaging device 11 is engaged and the sun gear 51 is fixed to the case 9, the second engaging device 12 is released and the connection between the sun gear 51 and the carrier 54 is released, the first shift stage is set. It is formed. In this state, the rotation of the input member 20 is decelerated according to the gear ratio of the planetary gear mechanism 50 and transmitted to the output gear 55. Further, the second shift stage is formed in a state where the first engaging device 11 is released, the sun gear 51 is separated from the case 9, the second engaging device 12 is engaged, and the sun gear 51 and the carrier 54 are connected to each other. Will be done. In this state, the rotation of the input member 20 is transmitted to the output gear 55 at the same rotation speed.

In the example shown in FIG. 2, the sleeve member 15 is arranged so as to be externally fitted to the fourth engaging portion 51a that rotates integrally with the sun gear 51. Specifically, the internal teeth formed on the inner peripheral portion of the sleeve member 15 are restricted from relative rotation to the external teeth formed on the outer peripheral portion of the fourth engaging portion 51a, and relative movement in the axial direction is permitted. Engage in the form to be (specifically, spline-engaged). Then, the position in the axial direction in which the sleeve member 15 engages with both the fourth engaging portion 51a and the fifth engaging portion 9a fixed to the case 9 (in the figure from the position of the sleeve member 15 shown in FIG. 2). The sun gear 51 is fixed to the case 9 by engaging the first engaging device 11 while moving to the position on the right side). In this state, the internal teeth formed on the inner peripheral portion of the sleeve member 15 are the external teeth formed on the outer peripheral portion of the fourth engaging portion 51a and the external teeth formed on the outer peripheral portion of the fifth engaging portion 9a. Are engaged in both. Further, the first engaging device 11 is released in a state where the sleeve member 15 is moved to a position in the axial direction (for example, the position of the sleeve member 15 shown in FIG. 2) that does not engage with the fifth engaging portion 9a. The sun gear 51 is separated from the case 9.

Next, the configuration of the control device 5 will be described. The control device 5 includes an arithmetic processing unit such as a CPU (Central Processing Unit) as a core member, and also includes a storage device such as a RAM (RandomAccessMemory) and a ROM (ReadOnlyMemory) that can be referred to by the arithmetic processing unit. ing. Then, each function of the control device 5 is realized by software (program) stored in a storage device such as ROM, hardware such as a separately provided arithmetic circuit, or both of them. The arithmetic processing unit included in the control device 5 operates as a computer that executes each program.

As shown briefly in FIG. 1, a sensor group 8 is provided in the vehicle 1, and the control device 5 is configured to be able to acquire detection information (sensor detection information) of various sensors constituting the sensor group 8. ing. The sensor detection information includes, for example, accelerator opening information, brake operation amount information, vehicle speed information, rotation speed information of the input member 20, rotation speed information of the output member 30, and a range by the driver of the vehicle 1. Includes information on selection operation of travel range, neutral range, parking range, etc., information on operation of main switch (for example, ignition switch) by the driver of vehicle 1, information on axial position or movement amount of sleeve member 15. Is done.

When the control device 5 starts the vehicle 1 on which the vehicle drive transmission device 4 is mounted in a state where the first engagement device 11 is released, the control device 5 executes the first engagement control and the second engagement control. The output member 30 is rotationally driven by the torque transmitted from the input member 20 to the output member 30 via the first engaging device 11 or the second engaging device 12. By rotationally driving the output member 30 in this way, the vehicle 1 starts. For example, the control device 5 is a vehicle 1 in a state in which the first engaging device 11 is released and the second engaging device 12 is released (in the example shown in FIG. 1, the third engaging device 13 is further released). The first engagement control and the second engagement control are executed when the vehicle is started. In addition, "execution of the first engagement control and the second engagement control" always means both the first engagement control and the second engagement control as in the examples shown in FIGS. 3 and 5 described later. When it is executed, and as in the example shown in FIG. 4 described later, the first engagement control is always executed, and the second engagement control is executed according to a condition (specifically, the first engagement device 11). It is a concept that includes both cases (executed on the condition that they are not engaged). That is, when the vehicle 1 is started, the control device 5 executes at least the first engagement control of the first engagement control and the second engagement control.

Here, the first engagement control is a control for continuously executing an engagement operation for engaging the first engagement device 11 until the first engagement device 11 is engaged. The control device 5 controls the operation of the actuator of the first engaging device 11 (in this embodiment, the actuator that drives the sleeve member 15 in the axial direction) to engage the first engaging device 11. Perform a combined operation. For example, when the actuator to be controlled is an electric actuator, the control device 5 controls the supply current to the actuator, and when the actuator to be controlled is a hydraulic actuator, the control device 5 transfers to the actuator. Control the supply hydraulic pressure. In the present embodiment, as the engaging operation, an operation of controlling the actuator to apply an axial thrust to the sleeve member 15 is executed. The direction of this thrust is such that the sleeve member 15 is moved from the position where the first engaging device 11 is released to the position where the first engaging device 11 is engaged.

In the first engagement control, the above engagement operation is continuously executed until the first engagement device 11 is engaged. Here, "continuously executing the engagement operation" means that the engagement operation is continuously executed and the engagement operation is intermittently executed (that is, the engagement operation is performed at intervals). It is a concept that includes both of them (when it is executed repeatedly). In the former case, axial thrust is continuously applied to the sleeve member 15 until the first engaging device 11 is engaged. In the latter case, the operation of applying the axial thrust to the sleeve member 15 is intermittently (that is, repeated) until the first engaging device 11 is engaged. When the engagement operation (specifically, the thrust applying operation) is repeatedly performed in this way, all the engagement operations or the second and subsequent engagement operations (that is, the retry operations) have a rotational speed of the output member 30. It may be configured to be executed on condition that the speed exceeds a predetermined speed.

For example, an internal tooth formed on the inner peripheral portion of the sleeve member 15 and an external tooth that is engaged with the internal tooth in order to engage the first engaging device 11 (first engagement in the example shown in FIG. 1). If the phase is the same as the external teeth formed on the outer peripheral portion of the portion 41a, or the external teeth formed on the outer peripheral portion of the fifth engaging portion 9a in the example shown in FIG. 2, these internal teeth Since the teeth come into contact with each other (opposite in the axial direction) between the tooth and the external tooth, the first engaging device 11 may not be engaged even if the engaging operation is executed. In particular, when the second engaging device 12 is controlled to be in a fully engaged state, the first engaging device 11 cannot normally be engaged unless the above-mentioned phases are completely out of phase. On the other hand, when the second engaging device 12 is controlled to be in the semi-engaged state, the teeth are driven by the axial thrust applied to the sleeve member 15 even when the above phases are not completely out of phase. The first engaging device 11 can be engaged by generating a pushing action on the contacting portions between the chamfering portions (specifically, the contacting portions between the chamfered portions (chanfas)). Therefore, even if the first engagement device 11 cannot be engaged at the start of the first engagement control, the engagement operation is continuously executed until the first engagement device 11 is engaged. By doing so, the first engaging device 11 can be engaged relatively early.

Here, the "semi-engaged state" of the second engaging device 12 means that the second engaging device 12 is engaged (in other words, the transmission torque capacity of the second engaging device 12 is larger than zero). In addition, the transmission torque capacity of the second engaging device 12 is displaced from the phase of the teeth by the pushing force acting on the contact portion between the teeth of the first engaging device 11 to engage the first engaging device 11. It means a state limited to the torque that can be made. That is, "to make the second engaging device 12 into a half-engaged state" or "to control to a half-engaged state" means that the transmission torque capacity of the second engaging device 12 is limited as described above. It means engaging the engaging device 12. When the second engaging device 12 is controlled to be in the semi-engaged state and a torque larger than the transmission torque capacity of the second engaging device 12 is input to the second engaging device 12, the sliding engaging state (slip engagement state). Specifically, it is in a semi-engaged state and a slip-engaged state).

The control device 5 determines whether or not the first engaging device 11 is engaged based on the sensor detection information. For example, when the sleeve member 15 moves to a specified position, it is determined that the first engaging device 11 is engaged, or when the amount of movement of the sleeve member 15 in the axial direction reaches the specified amount. 1 It may be configured that the engaging device 11 is determined to be engaged.

On the other hand, the second engagement control is a control in which the second engagement device 12 is in a semi-engaged state until the first engagement device 11 is engaged. As an example, in the present embodiment, the second engagement control semi-engages the second engagement device 12 until the first engagement device 11 engages when there is a start preparation request for the vehicle 1. It is a control to make it a state. Therefore, in the present embodiment, the second engagement control is started in response to the start preparation request of the vehicle 1 as in the example shown in FIGS. 3 and 5, or the second engagement control is started in response to the start preparation request of the vehicle 1 as in the example shown in FIG. It will start after the time when the start preparation request is made. In the present embodiment, when the output member 30 starts to rotate without the first engaging device 11 engaging, the control device 5 semi-engages the second engaging device 12 by the second engagement control. While controlling to, the input torque (input torque from the rotary electric machine 3 to the input member 20, the same applies hereinafter) is controlled so that the rotation speed of the input member 20 approaches the synchronous rotation speed. Here, the synchronous rotation speed is the rotation speed of the input member 20 determined according to the rotation speed of the output member 30 and the gear ratio of the first shift stage. Specifically, the synchronous rotation speed is a rotation speed obtained by multiplying the rotation speed of the output member 30 by the gear ratio of the first shift stage. By controlling the rotation speed of the input member 20 so as to approach the synchronous rotation speed in this way, when the vehicle 1 is started in the second shift stage instead of the first shift stage, the second engagement device 12 is set. By sliding, the rotational speed of the input member 20 can be maintained at a rotational speed at which the first engaging device 11 can be engaged. The control device 5 controls the operation of the inverter device 6 to control the output torque of the rotary electric machine 3, thereby controlling the input torque so that the rotation speed of the input member 20 approaches the synchronous rotation speed. Further, the control device 5 controls the operation of the actuator of the second engaging device 12 to control the second engaging device 12 to the semi-engaged state. For example, the control device 5 puts the second engaging device 12 in a semi-engaged state having a transmission torque capacity corresponding to the required torque (torque required to be transmitted from the input member 20 side to the output member 30). Control. In this case, the behavior of the vehicle 1 felt by the driver when the vehicle 1 starts in the second shift instead of the first shift is closer to the behavior of the vehicle 1 when the vehicle 1 starts in the first shift. It will be easier.

In the present embodiment, when the first engaging device 11 is engaged during the execution of the second engaging control, the control device 5 releases the second engaging device 12 and reduces the input torque to the second. 2 End the engagement control. As a result, the torque transmitted to the output member 30 after the end of the second engagement control is transferred to the output member 30 before the end of the second engagement control, as compared with the case where the second engagement control is terminated without reducing the input torque. It is possible to approach the torque transmitted to the output member 30. As a result, it is possible to suppress fluctuations in the torque transmitted to the output member 30 before and after the first engaging device 11 is engaged and the second engagement control is terminated.

In the present embodiment, the control device 5 is in a state where the first engaging device 11 is not engaged with the input torque after the first engaging device 11 is engaged and the second engagement control is completed. The input torque during execution of the second engagement control in 1 is controlled to be close to the torque obtained by multiplying the gear ratio of the second gear by the value obtained by dividing the gear ratio of the first gear. As a result, the torque transmitted to the output member 30 after the end of the second engagement control is about the same as the torque transmitted to the output member 30 before the end of the second engagement control. It is possible to control the input torque after the device 11 is engaged and the second engagement control is completed. As a result, the fluctuation of the torque transmitted to the output member 30 before and after the first engaging device 11 is engaged and the second engagement control is terminated can be further suppressed.

When the control device 5 starts the vehicle 1 in a state where the first engaging device 11 is released (in the present embodiment, when there is a start preparation request for the vehicle 1 in a state where the first engaging device 11 is released). For example, the first engagement control and the second engagement control are executed according to any of the processing procedures of FIGS. 3 to 5 to start the vehicle 1. Specifically, the control device 5 executes the first engagement control and the second engagement control when there is a start preparation request for the vehicle 1 in a state where the first engagement device 11 is released. After that, when there is a start request for the vehicle 1, the output member 30 is rotationally driven by the torque transmitted from the input member 20 to the output member 30 via the first engaging device 11 or the second engaging device 12. 1 starts. The control device 5 may, for example, detect a system activation operation by the vehicle 1 driver (for example, an on operation of the main switch) while the vehicle 1 system is stopped, or the vehicle 1 system may be activated. When a range switching operation from the parking range to another range by the driver of the vehicle 1 is detected in this state, it is determined that there is a start preparation request for the vehicle 1. Further, the control device 5 determines, for example, that there is a start request for the vehicle 1 when the start operation by the driver of the vehicle 1 is detected. The starting operation is, for example, an operation of depressing the accelerator pedal when the traveling range (forward range or reverse range) is selected, or an operation of releasing the brake when the traveling range is selected.

When the control device 5 starts the vehicle 1 according to the processing procedure shown in FIG. 3, when there is a start preparation request for the vehicle 1 (step # 01: Yes), the control device 5 controls the first engagement and the second. Engagement control is started (step # 02). Then, when it is determined that the first engagement device 11 is engaged (step # 03: Yes), the control device 5 ends the second engagement control (step # 04). In this case, if the first engaging device 11 is engaged before the time when the output member 30 starts to rotate (that is, before the time when the starting request of the vehicle 1 is made, the same applies hereinafter), the vehicle 1 is subjected to the first shift stage. Start with. On the other hand, if the first engaging device 11 does not engage before the time when the output member 30 starts to rotate, the vehicle 1 starts at the second shift stage, and then the first engaging device 11 engages. Then, the gear is changed from the second gear to the first gear. When the control device 5 starts the vehicle 1 according to the processing procedure shown in FIGS. 3 and 5, the control device 5 starts at least the second engagement control in response to the start preparation request of the vehicle 1. Therefore, even if there is a start request for the vehicle 1 immediately after the start preparation request for the vehicle 1, the vehicle 1 can be started quickly regardless of the engagement state of the first engaging device 11.

Here, "starting the first engagement control and the second engagement control" in step # 02 means that the first engagement control and the second engagement control are started at the same time and the first engagement control. It is a concept including both the case where the second engagement control and the case where the second engagement control is started at different timings. When the first engagement control and the second engagement control are started at different timings and the second engagement control is started after the start of the first engagement control, the first engagement device 11 engages. The second engagement control is started before the time when it can be determined whether or not the control has been performed. The time point at which it can be determined whether or not the first engagement device 11 is engaged is, for example, the time required for the first engagement device 11 to engage after the first engagement control is started (for example, the first engagement device 11). It is assumed that the time required for axially moving the sleeve member 15 to the position where the engaging device 11 is engaged) has elapsed. Further, when the first engagement control and the second engagement control are started at different timings and the first engagement control is started after the start of the second engagement control, for example, the output member 30 rotates. The first engagement control is started before the time when the first engagement device is started, or before the second engagement device 12 is in the desired semi-engagement state (specifically, the transmission torque capacity of the second engagement device 12). The first engagement control is started (before the target value is reached).

When the control device 5 starts the vehicle 1 according to the processing procedure shown in FIG. 4, when there is a start preparation request for the vehicle 1 (step # 10: Yes), the control device 5 starts the first engagement control. (Step # 11). Then, the control device 5 determines whether or not the first engaging device 11 is engaged (step # 12). This determination is performed after the time required for the engagement of the first engagement device 11 has elapsed since the first engagement control was started. When the control device 5 determines that the first engagement device 11 is engaged (step # 12: Yes), the control device 5 does not execute the second engagement control, and the vehicle 1 starts at the first shift stage. On the other hand, when the control device 5 determines that the first engagement device 11 is not engaged (step # 12: No), the control device 5 starts the second engagement control (step # 13). When it is determined that the first engagement device 11 is engaged after the start of the second engagement control (step # 14: Yes), the control device 5 ends the second engagement control (step # 15). When the control device 5 starts the second engagement control, if the first engagement device 11 engages before the time when the output member 30 starts to rotate, the vehicle 1 starts at the first shift stage. On the other hand, if the first engaging device 11 does not engage before the time when the output member 30 starts to rotate, the vehicle 1 starts at the second shift stage, and then the first engaging device 11 engages. Then, the gear is changed from the second gear to the first gear.

As described above, when the vehicle 1 is started according to the processing procedure shown in FIG. 4, the control device 5 is required that the first engagement device 11 is not engaged after the first engagement control is started. The second engagement control is started. Thereby, the scene where the second engagement control is executed can be limited to the scene where the first engagement control is started but the first engagement device 11 is not engaged. As a result, it is possible to prevent the second engagement control from being executed more than necessary, and it becomes easy to secure the durability of the second engagement device 12, for example.

When the control device 5 starts the vehicle 1 according to the processing procedure shown in FIG. 5, when there is a start preparation request for the vehicle 1 (step # 20: Yes), the control device 5 starts the second engagement control. Later (step # 21), the first engagement control is started (step # 22). Then, when it is determined that the first engagement device 11 is engaged (step # 23: Yes), the control device 5 ends the second engagement control (step # 24). The start time point of the first engagement control in step # 22 can be, for example, a time point after the time point at which the output member 30 starts to rotate (that is, a time point after the start request of the vehicle 1 is made). In this case, the vehicle 1 always starts in the second shift stage, and then when the first engagement device 11 engages, the speed is changed from the second shift stage to the first shift stage.

By the way, for example, even when the first engaging device 11 cannot be engaged because the phases of the teeth match when the vehicle 1 is stopped, after the rotation of the output member 30 is started, the shaft member It can be expected that the phases of the teeth are shifted to the extent that the first engaging device 11 can be engaged due to twisting, vibration, or the like. In view of this point, for example, the control device 5 is configured to execute the engagement operation in the first engagement control on the condition that the rotation speed of the output member 30 exceeds a predetermined speed. Can be done. When the control device 5 starts the vehicle 1 according to the procedure shown in FIG. 3 or 4 (that is, when the first engagement control is started before the time when the output member 30 starts to rotate). The "engagement operation in the first engagement control" here may be the second and subsequent engagement operations (retry operation) in the first engagement control. The control device 5 is configured to execute the engagement operation in the first engagement control on the condition that the rotation speed of the output member 30 exceeds a predetermined speed, so that the teeth are executed when the vehicle 1 is stopped. Even when the phases of the teeth are the same, the engagement operation in the first engagement control can be executed in a situation where the phases of the teeth are expected to be out of phase. As a result, it is possible to prevent the engagement operation in the first engagement control from being repeatedly executed in a situation where it is difficult to engage the first engagement device 11 (for example, a situation in which the output member 30 is not rotating). It will be easier.

FIG. 6 shows an example of the control behavior when the control device 5 starts the vehicle 1 according to the processing procedure shown in FIG. In FIG. 6, a graph of an input rotation speed (rotational speed of the input member 20) and an output rotation speed (rotational speed of the output member 30), a graph of an engagement request of the first engaging device 11, and an output torque from the transmission 10 Graph, graph of the engagement state of the first engaging device 11, graph of the engagement state of the second engaging device 12, graph of the input torque from the rotary electric machine 3 to the input member 20, and the first. The graphs of the transmission torques of the engaging device 11 and the second engaging device 12 are shown in order from the top. In the rotation speed graph of FIG. 6, the rotation speed indicated by "1st" is the rotation speed obtained by multiplying the rotation speed of the output member 30 by the gear ratio of the first gear (the above-mentioned synchronous rotation speed), and is "2nd". The rotation speed indicated by is the rotation speed obtained by multiplying the rotation speed of the output member 30 by the gear ratio of the second shift stage. In the graph of the transmission torque of FIG. 6, the transmission torque capacity of the second engaging device 12 is shown by a broken line.

In FIG. 6, it is assumed that the vehicle 1 is stopped in a state where the first engaging device 11 is released and the second engaging device 12 is released at a time point before the time t1. Then, when there is a start preparation request for the vehicle 1 at time t1, the control device 5 starts the first engagement control and the second engagement control. With the start of the first engagement control, the engagement request of the first engagement device 11 becomes valid (ON) after the time t1.

In FIG. 6, the first engaging device 11 could not be engaged at the time t1, and the first engaging device 11 was released at the time t2 because the vehicle 1 was requested to start at the time t2 after the time t1. It is assumed that the output member 30 starts to rotate (that is, the vehicle 1 starts at the second shift stage). Therefore, after the time t1, the engagement operation for engaging the first engagement device 11 is continuously executed, and the second engagement device 12 is controlled to the semi-engagement state, so that the second engagement device 12 is engaged. A transmission torque capacity is generated in the device 12. In the graph of the engagement state of the first engagement device 11 in FIG. 6, the engagement operation is continuously executed with the first engagement device 11 released during the period from time t1 to time t3. It is represented by a broken line.

From time t1 to time t2, although the transmission torque capacity is generated in the second engaging device 12, the second engaging device 12 is not slipped. When the output member 30 starts to rotate at time t2, the control device 5 is the rotation speed of the input member 20 in a state where the second engagement device 12 is controlled to the semi-engaged state by the second engagement control. The input torque from the rotary electric machine 3 to the input member 20 is controlled so that the input rotation speed approaches the synchronous rotation speed. As a result, after time t2, the second engaging device 12 in the sliding engaged state, which is controlled to be in the semi-engaged state, transmits torque having a transmission torque capacity. After time t2, the transmission torque capacity of the second engaging device 12 is increased so as to have a magnitude corresponding to the required torque, and the input torque and the output torque are also increased accordingly.

Then, when the first engaging device 11 engages at a time t3 after the time t2, the second engaging device 12 is released with the end of the second engagement control, and the shift stage of the transmission 10 is changed to the second stage. The shift stage is changed to the first shift stage. In the present embodiment, the control device 5 is in a state where the first engaging device 11 is not engaged with the input torque after the first engaging device 11 is engaged and the second engagement control is completed. It is controlled so as to approach the torque obtained by multiplying the input torque during execution of the second engagement control by the value obtained by dividing the gear ratio of the second shift stage by the gear ratio of the first shift stage. Therefore, the fluctuation of the output torque before and after the time t3 is suppressed to be small.

[Other embodiments]
Next, other embodiments of the control device will be described.

(1) In the above embodiment, the control device 5 engages the input torque after the first engagement device 11 engages and ends the second engagement control, and the first engagement device 11 engages with the input torque. The torque obtained by multiplying the input torque during execution of the second engagement control in the absence state by the value obtained by dividing the gear ratio of the second shift stage by the gear ratio of the first gear (hereinafter referred to as "target torque"). An example of a configuration in which control is performed so as to bring them closer to each other has been described. However, the present disclosure is not limited to such a configuration, and the input torque after the control device 5 engages with the first engagement device 11 and ends the second engagement control is referred to as the above-mentioned target torque. It is also possible to control the torque so that it approaches torques of different sizes.

(2) In the above embodiment, when the first engaging device 11 is engaged while the second engaging control is being executed, the control device 5 releases the second engaging device 12 and reduces the input torque. The configuration in which the second engagement control is terminated is described as an example. However, the present disclosure is not limited to such a configuration, and the control device 5 releases the second engagement device 12 when the first engagement device 11 is engaged while the second engagement control is being executed. At the same time, the second engagement control may be terminated without reducing the input torque.

(3) The configurations disclosed in each of the above-described embodiments should be applied in combination with the configurations disclosed in other embodiments as long as there is no contradiction (the embodiments described as other embodiments are used). (Including combinations) is also possible. With respect to other configurations, the embodiments disclosed herein are merely exemplary in all respects. Therefore, various modifications can be appropriately made without departing from the spirit of the present disclosure.

[Summary of this embodiment]
Hereinafter, the outline of the control device described above will be described.

The input member (20) that is driven and connected to the rotary electric machine (3), the output member (30) that is driven and connected to the wheel (2), the meshing type first engaging device (11), and the friction type second. The transmission (10) is provided with an engaging device (12) and a transmission (10) arranged in a power transmission path between the input member (20) and the output member (30). However, the first gear is formed in a state where the first engaging device (11) is engaged and the second engaging device (12) is released, and the first engaging device (11) is released. A control device (4) for controlling a vehicle drive transmission device (4) that forms a second shift stage having a gear ratio smaller than that of the first shift stage in a state where the second engagement device (12) is engaged (a control device). 5) The first engagement control and the first engagement control and the first when the vehicle (1) on which the vehicle drive transmission device (4) is mounted is started in a state where the first engagement device (11) is released. 2 Engagement control is executed, and the torque transmitted from the input member (20) to the output member (30) via the first engagement device (11) or the second engagement device (12). The output member (30) is rotationally driven, and the second engagement control puts the second engagement device (12) in a semi-engaged state until the first engagement device (11) is engaged. In the first engagement control, an engagement operation for engaging the first engagement device (11) is performed until the first engagement device (11) is engaged. It is a control that is continuously executed.

According to this configuration, when the vehicle (1) is started, the control device (5) executes the first engagement control and the second engagement control, so that the start timing of the first engagement control and the second engagement control are performed. If the first engagement device (11) is not engaged at the start of the second engagement control regardless of the context with the start timing of the combined control, the second engagement is performed by executing the second engagement control. By putting the coupling device (12) in the semi-engaged state, the vehicle can be started at the second shift stage instead of the first shift stage. As a result, even if the first engaging device (11) cannot be engaged because the teeth are in phase with each other (that is, the teeth are in contact with each other), the vehicle (1) is quickly started. It is possible to make it.

In this configuration, during the execution of the first engagement control and the second engagement control, the first engagement device (12) is controlled to be in a semi-engaged state instead of a fully engaged state. An engaging operation for engaging the engaging device (11) is continuously performed. Therefore, even if the first engagement device (11) cannot be engaged at the start of the first engagement control, the engagement operation for engaging the first engagement device (11) is continued. By executing this, the first engaging device (11) can be engaged by shifting the phase of the teeth by the pushing force acting on the contact portion between the teeth. Therefore, even if the first engaging device (11) cannot be engaged at the start of the first engaging control, the first engaging device (11) is engaged relatively early, and accordingly. By terminating the second engagement control, it is possible to quickly shift from the second shift stage to the first shift stage. As described above, according to this configuration, when the vehicle (1) is started in the second shift stage instead of the first shift stage, the shift from the second shift stage to the first shift stage is quickly performed. Is possible.

Here, the first engaging device (11) uses the rotational speed of the input member (20), which is determined according to the rotational speed of the output member (30) and the gear ratio of the first shift stage, as the synchronous rotational speed. When the output member (30) starts to rotate without being engaged, the input is while the second engagement device (12) is controlled to the semi-engaged state by the second engagement control. It is preferable to control the input torque from the rotary electric machine (3) to the input member (20) so that the rotation speed of the member (20) approaches the synchronous rotation speed.

According to this configuration, when the vehicle (1) is started in the second shift stage instead of the first shift stage, the rotation speed of the input member (20) is engaged with the first engagement device (11). It is possible to maintain a rotation speed that is easy to make. Therefore, even when the vehicle (1) is started in the second gear instead of the first gear, it is easy to quickly shift from the second gear to the first gear.

Further, when the first engaging device (11) is engaged during the execution of the second engaging control, the second engaging device (12) is released and the rotary electric machine (3) is released. The second engagement control is terminated by reducing the input torque to the input member (20), and the first engagement device (11) is engaged and the second engagement control is terminated. The input torque is applied to the input torque during execution of the second engagement control in a state where the first engaging device (11) is not engaged, and the gear ratio of the second gear is set to the first gear. It is preferable to control the torque so that it approaches the torque multiplied by the value divided by the gear ratio of the gear.

According to this configuration, the torque transmitted to the output member (30) after the end of the second engagement control is about the same as the torque transmitted to the output member (30) before the end of the second engagement control. As described above, the input torque after the first engagement device (11) is engaged and the second engagement control is completed can be controlled. Therefore, it is easy to suppress the fluctuation of the torque transmitted to the output member (30) before and after the first engagement device (11) is engaged and the second engagement control is terminated.

Further, it is preferable to execute the engagement operation in the first engagement control on the condition that the rotation speed of the output member (30) exceeds a predetermined speed.

For example, even if the first engaging device (11) cannot be engaged because the phases of the teeth match when the vehicle (1) is stopped, after the rotation of the output member (30) is started, It can be expected that the phases of the teeth are shifted to the extent that the first engaging device (11) can be engaged due to the twisting or vibration of the shaft member. According to this configuration, in a situation where the phases of the teeth are expected to be out of phase, the engagement operation in the first engagement control can be executed, so that the first engagement device (11) is engaged. It is easy to avoid that the engagement operation in the first engagement control is repeatedly executed in a difficult situation (for example, a situation in which the output member (30) is not rotating).

Further, when the vehicle (1) is started in a state where the first engaging device (11) is released, the first engaging device (11) engages after starting the first engaging control. It is preferable to start the second engagement control on the condition that the second engagement control is not performed.

According to this configuration, the scene where the second engagement control is executed can be limited to the scene where the first engagement control is started but the first engagement device (11) is not engaged. Therefore, it is possible to prevent the second engagement control from being executed more than necessary, and it becomes easy to secure the durability of the second engagement device (12), for example.

The control device according to the present disclosure may be capable of exerting at least one of the above-mentioned effects.

1: Vehicle, 2: Wheel, 3: Rotating electric machine, 4: Vehicle drive transmission device, 5: Control device, 10: Transmission, 11: First engagement device, 12: Second engagement device, 20: Input Member, 30: Output member

Claims

The input member and the output member are provided with an input member that is driven and connected to a rotary electric machine, an output member that is driven and connected to a wheel, and a meshing type first engaging device and a friction type second engaging device. The transmission comprises a transmission arranged in a power transmission path between the two, and the transmission forms a first shift stage in a state where the first engaging device is engaged and the second engaging device is released. A vehicle drive transmission device that forms a second gear with a gear ratio smaller than that of the first gear in a state where the first engaging device is released and the second engaging device is engaged is controlled. It is a control device
When the vehicle on which the vehicle drive transmission device is mounted is started with the first engagement device released, the first engagement control and the second engagement control are executed, and the first engagement member is used to perform the first engagement control. The output member is rotationally driven by the torque transmitted to the output member via one engagement device or the second engagement device.
The second engagement control is a control that puts the second engagement device in a semi-engaged state until the first engagement device is engaged.
The first engagement control is a control device that continuously executes an engagement operation for engaging the first engagement device until the first engagement device is engaged.
The rotational speed of the input member, which is determined according to the rotational speed of the output member and the gear ratio of the first shift stage, is defined as the synchronous rotational speed.
When the output member starts to rotate without engaging the first engaging device, the input is performed while the second engaging device is controlled to be in a semi-engaged state by the second engaging control. The control device according to claim 1, wherein the input torque from the rotary electric machine to the input member is controlled so that the rotation speed of the member approaches the synchronous rotation speed.
When the first engaging device is engaged during the execution of the second engaging control, the second engaging device is released and the input torque from the rotary electric machine to the input member is reduced. After finishing the second engagement control,
Execution of the second engagement control in a state where the first engagement device is not engaged with the input torque after the first engagement device is engaged and the second engagement control is completed. The control device according to claim 1 or 2, wherein the control device is controlled so as to approach the torque obtained by multiplying the input torque in the engine by a value obtained by dividing the gear ratio of the second gear by the gear ratio of the first gear.
The control according to any one of claims 1 to 3, wherein the engagement operation in the first engagement control is executed on condition that the rotation speed of the output member exceeds a predetermined speed. Device.
When the vehicle is started in a state where the first engaging device is released, the second engagement is provided on condition that the first engaging device is not engaged after the first engagement control is started. The control device according to any one of claims 1 to 4, wherein the combined control is started.