JP2017213932A - Driving force transmission device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pulse drive type driving force transmission device of a multiple input and output type.SOLUTION: A driving force transmission device 10 comprises a connection part 18 to a first rotary part 32, a second rotary part 28, a connection part 20 to a third rotary part 34, an elastic member 26 and a vibrator 24. One end of the elastic member 26 is fixed to the second rotary part 28, and the other end thereof is fixed to the vibrator 24. The vibrator 24 can become either a first state in which the vibrator is connected to the first rotary part 32 via the connection part 18 to the first rotary part 32 or a second state in which connection to the first rotary part 32 is released. Further, the vibrator 24 can become either a third state in which the vibrator is connected to the third rotary part 34 via the connection part 20 to the third rotary part 34 or a fourth state in which connection to the third rotary part 34 is released.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a so-called pulse drive type driving force transmission device that intermittently transmits driving force of an input shaft to an output shaft.

  2. Description of the Related Art Conventionally, a driving force transmission device that transmits driving force of an input shaft intermittently to an output shaft by changing angular velocity or torque has been used. For example, Patent Document 1 discloses a so-called pulse drive type driving force transmission device.

  In the transmission device, an elastic member is arranged around the output shaft. One end of the elastic member is connected to the output shaft, and the other end is connected to a vibrator serving as a weight. The vibrator freely moves (vibrates) around the output shaft as the elastic member expands and contracts. At a predetermined timing, for example, when the angular velocity of the vibrator becomes equal to the rotational speed of the input shaft, the vibrator is engaged with the input shaft by the clutch. During this engagement period, the elastic member is stretched (or contracted) to accumulate elastic energy. Thereafter, the vibrator, which is disengaged from the input shaft, freely moves (vibrates), and is then fixed by a brake at a predetermined timing, for example, when the angular velocity of the vibrator becomes zero. At this time, torque is transmitted to the output shaft by the elastic member biasing the output shaft. Thus, torque is transmitted from the input shaft to the output shaft via elastic energy.

Japanese Patent Application Laid-Open No. 2015-135179

  A conventional pulse drive type driving force transmission device is of a 1-input 1-output type, and it is difficult to cope with a plurality of inputs and outputs. Accordingly, an object of the present invention is to provide a multi-input multi-output type pulse drive type driving force transmission device.

  The driving force transmission device according to the present invention includes a connecting portion to the first rotating portion, a second rotating portion, a connecting portion to the third rotating portion, an elastic member, and a vibrator. One end of the elastic member is fixed to the second rotating portion, and the other end is fixed to the vibrator. The vibrator is in any one of a first state in which the vibrator is connected to the first rotating part via a connection part to the first rotating part and a second state in which the connection with the first rotating part is released. It is possible to become. The vibrator is in any one of a third state in which the vibrator is connected to the third rotating part and a fourth state in which the connection with the third rotating part is released through the connecting part to the third rotating part. It is possible to enter a state.

  In the above invention, the driving force transmission device may include control means. The control means includes: a first control for controlling the vibrator to the first state; a second control for controlling the vibrator to the second state; a third control for controlling the vibrator to the third state; It is possible to perform the 4th control which controls to 4 states.

  In the above invention, the first rotating part may be a drive shaft of the internal combustion engine. In this case, the first state is a state where the vibrator and the drive shaft of the internal combustion engine are connected, and the second state is a state where the connection between the vibrator and the drive shaft of the internal combustion engine is released.

  In the above invention, the third rotating unit may be a rotor of a rotating electrical machine. In this case, the third state is a state where the vibrator and the rotor are connected, and the fourth state is a state where the connection between the vibrator and the rotor is released.

  In the above invention, the second rotating part may be an output shaft connected to a load.

  Further, in the above invention, the control means includes a control A for transmitting the driving energy transmitted from the first rotating unit and the third rotating unit to the second rotating unit, and a driving energy input from the first rotating unit, It may be possible to selectively control one of the control B transmitted to the second rotating unit and the third rotating unit.

  In the above invention, the control means can perform a fifth control for controlling to a fifth state for fixing the vibrator and a sixth control for controlling to a sixth state for releasing the fixation of the vibrator. It may be.

  In the above invention, as the control A, the control means performs the first control, accumulates the driving energy of the first rotating portion as the elastic energy of the elastic member, and then shifts to the second control, and performs the third control. Execute and store the driving energy of the third rotating portion in the power running state as the elastic energy of the elastic member, and then shift to the fourth control, execute the fifth control, and store it in the first and third controls. Alternatively, after the elastic energy of the elastic member is transmitted as the driving energy of the second rotating portion, the sixth control may be shifted to.

  In the above invention, as the control B, the control means executes the first control, accumulates the driving energy of the first rotating portion as the elastic energy of the elastic member, and then shifts to the second control, and performs the fifth control. Execute and transfer a part of the accumulated elastic energy of the elastic member as the driving energy of the second rotating part, then shift to the sixth control, execute the third control, and store the elastic energy of the elastic member After the other part is transmitted as drive energy for the third rotating unit in the regenerative state, the fourth control may be started.

  In the above invention, the control means, as the control B, is the energy transmitted from the first rotating part to the second rotating part via the elastic member when the first control is executed, and the elastic member when the fifth control is executed. The sum of the energy transmitted from the second rotating unit to the second rotating unit may be balanced with the energy transmitted from the second rotating unit to the third rotating unit via the elastic member when the third control is executed.

  In the above invention, as the control A, the control means performs the first control, accumulates the driving energy of the first rotating portion as the elastic energy of the elastic member, and then shifts to the second control, and performs the third control. And the third rotating part is driven by power running, and the elastic energy of the elastic member accumulated by the first control and the driving energy of the third rotating part are transmitted as the driving energy of the second rotating part, and then the fourth control is performed. You may make it transfer.

  In the above invention, as the control B, the control means executes the first control, accumulates the driving energy of the first rotating unit as the elastic energy of the elastic member, and then shifts to the second control, and performs the third control. And a part of the elastic energy of the elastic member accumulated by the first control is transmitted as the driving energy of the third rotating part in the regenerative state, and the other part of the elastic energy is transferred to the driving energy of the second rotating part. May be transferred to the fourth control after that.

  In the above invention, the control means, as control B, controls the energy transmitted from the first rotating part to the second rotating part via the elastic member when the first control is executed, and the elastic member when the third control is executed. The energy transmitted from the second rotating part to the third rotating part may be balanced.

  In the above invention, the control means may be capable of performing a seventh control for fixing the first rotating part and an eighth control for releasing the fixing of the first rotating part.

  In the above invention, the control means executes the third control, accumulates the driving energy of the third rotating portion in the power running state as the elastic energy of the elastic member, and then shifts to the fourth control, The first control may be executed during the execution, and the elastic energy of the elastic member may be transmitted as the driving energy of the second rotating unit, and then the second control may be performed.

  ADVANTAGE OF THE INVENTION According to this invention, it becomes possible to provide a pulse drive type driving force transmission device of other input and other output type.

It is a figure which illustrates the composition of the driving force transmission device concerning a 1st embodiment. It is a figure which illustrates the transmission process (power flow) of the driving force at the time of control A execution of the driving force transmission apparatus which concerns on 1st Embodiment. It is a figure which illustrates the closed curve figure which shows the behavior of the vibrator | oscillator at the time of control A execution of the driving force transmission apparatus which concerns on 1st Embodiment. It is a graph explaining the torque transmission process at the time of control A execution of the driving force transmission device concerning a 1st embodiment. It is a figure which illustrates the power flow at the time of control B execution of the driving force transmission apparatus which concerns on 1st Embodiment. It is a figure which illustrates the closed curve figure which shows the behavior of the vibrator | oscillator at the time of control B execution of the driving force transmission apparatus which concerns on 1st Embodiment. It is a graph explaining the torque transmission process at the time of control B execution of the driving force transmission device concerning a 1st embodiment. It is a figure which illustrates the power flow at the time of control B * execution of the driving force transmission apparatus which concerns on 1st Embodiment. It is a figure which illustrates the closed curve figure which shows the behavior of the vibrator | oscillator at the time of control B * execution of the driving force transmission apparatus which concerns on 1st Embodiment. It is a graph explaining the torque transmission process at the time of control B * execution of the driving force transmission device concerning a 1st embodiment. It is a figure which illustrates the structure of the driving force transmission apparatus which concerns on 2nd Embodiment. It is a figure which illustrates the power flow at the time of control A execution of the driving force transmission apparatus which concerns on 2nd Embodiment. It is a figure which illustrates the closed curve figure which shows the behavior of the vibrator | oscillator at the time of control A execution of the driving force transmission apparatus which concerns on 2nd Embodiment. It is a graph explaining the torque transmission process at the time of control A execution of the driving force transmission device concerning a 2nd embodiment. It is a figure which illustrates the power flow at the time of control B execution of the driving force transmission apparatus which concerns on 2nd Embodiment. It is a figure which illustrates the closed curve figure which shows the behavior of the vibrator | oscillator at the time of control B execution of the driving force transmission apparatus which concerns on 2nd Embodiment. It is a graph explaining the torque transmission process at the time of control B execution of the driving force transmission device concerning a 2nd embodiment. It is a figure which illustrates the power flow at the time of control B * execution of the driving force transmission apparatus which concerns on 2nd Embodiment. It is a figure which illustrates the closed curve figure which shows the behavior of the vibrator | oscillator at the time of control B * execution of the driving force transmission apparatus which concerns on 2nd Embodiment. It is a graph explaining the torque transmission process at the time of control B * execution of the driving force transmission device concerning a 2nd embodiment. It is a figure which illustrates the power flow at the time of control C execution of the driving force transmission apparatus which concerns on 2nd Embodiment. It is a figure which illustrates the closed curve figure which shows the behavior of the vibrator | oscillator at the time of control C execution of the driving force transmission apparatus which concerns on 2nd Embodiment. It is a graph explaining the torque transmission process at the time of control C execution of the driving force transmission apparatus which concerns on 2nd Embodiment.

<First Embodiment>
FIG. 1 illustrates a driving force transmission device 10 according to the first embodiment. The driving force transmission device 10 is mounted on a so-called hybrid vehicle using, for example, the internal combustion engine 12 and the rotating electrical machine 14 as driving sources.

  The rotating electrical machine 14 can switch its driving state between power running and regeneration, and becomes a driven source (during regeneration) as well as a driving source (during power running). From this, when the rotary electric machine 14 is a drive source, the input / output form is two inputs and one output (input: internal combustion engine 12 and rotary electric machine 14, output: load 16). When the rotating electrical machine 14 is a driven source, the input / output mode is 1 input and 2 output (input: internal combustion engine 12, output: rotating electrical machine 14 and load 16).

  A driving force transmission device 10 shown in FIG. 1 includes an internal combustion engine side clutch 18 (connection portion to a first rotation portion), a rotating electrical machine side clutch 20 (connection portion to a third rotation portion), a brake 22, a vibrator 24, The elastic member 26, the output shaft 28 (2nd rotation part) connected with the load 16 (wheel), and the control part 30 (control means) are provided.

  The elastic member 26 has one end fixed to the output shaft 28 and the other end connected to the vibrator 24. The elastic member 26 may be constituted by, for example, a torsion spring (torsion spring). Further, it may be composed of a compression / tensile spring that expands and contracts along the circumference of the output shaft.

  One end of the vibrator 24 is fixed to the elastic member 26 and vibrates as the elastic member 26 expands and contracts. The vibrator 24 functions as a weight and has a predetermined mass.

  The internal combustion engine side clutch 18 (connecting portion to the first rotating portion) includes a pair of engaging members (for example, a pair of clutch plates). One engaging member is connected to the vibrator 24, and the other The engaging member is connected to the drive shaft 32 (first rotating portion) of the internal combustion engine 12. The internal combustion engine side clutch 18 is constituted by an electromagnetic clutch, for example. Hereinafter, the internal combustion engine side clutch 18 is also referred to as an EG side clutch 18.

  The rotating electrical machine side clutch 20 (connecting portion to the third rotating portion) includes a pair of engaging members (for example, a pair of clutch plates), and one engaging member is connected to the vibrator 24. The other engaging member is connected to the latter among the stator 35 and the rotor 34 (third rotating portion) of the rotating electrical machine 14. The rotating electrical machine side clutch 20 is configured by, for example, an electromagnetic clutch, like the EG side clutch 18. In the following, the rotating electrical machine side clutch 20 is also referred to as the MG side clutch 20.

  Similarly to the EG side clutch 18 and the MG side clutch 20, the brake 22 also includes a pair of engagement members (for example, a pair of brake plates), one of the engagement members is connected to the vibrator 24, and the other engagement member. Is connected to a fixed part such as a case of the driving force transmission device 10. The brake 22 is composed of, for example, an electromagnetic brake.

  The control unit 30 controls various devices of the driving force transmission device 10. The control unit 30 is configured by a computer, for example, and a memory (not shown) stores a program for executing drive transmission control described later.

  The control unit 30 receives the rotational speeds of the vibrator 24, the output shaft 28, the drive shaft 32 of the internal combustion engine 12, and the rotor 34 through a speed sensor (not shown). Further, the speed and torque of the internal combustion engine 12 and the rotating electrical machine 14 are controlled according to the received rotational speed and the program contents of the drive transmission control. Further, connection (engagement) / disconnection (release) control of the EG side clutch 18, the MG side clutch 20, and the brake 22 is performed.

<Driving force transmission control>
2 to 10 show examples of driving force transmission control of the driving force transmission device 10 according to the first embodiment. There are several patterns of driving force transmission control. As described later, FIGS. 2 to 4 show control A, FIGS. 5 to 7 show control B, and FIGS. 8 to 10 show special cases of control B. Each control pattern of (control B *) is illustrated. 2 to 10, the illustration of the load 16 and the control unit 30 is omitted as appropriate in order to simplify the illustration.

<Control A: Internal combustion engine + rotating electrical machine → output shaft>
FIG. 2 illustrates an outline (power flow) of the control A. In this example, the driving force (driving energy) of the internal combustion engine 12 and the rotating electrical machine 14 is transmitted to the output shaft 28 via the driving force transmission device 10.

  FIG. 3 illustrates a closed curve diagram of a driving example according to the control A. This closed curve diagram shows the displacement of the vibrator 24 and the displacement (extension / contraction) of the elastic member 26 connected thereto. In the diagram, a thick solid line represents the displacement of the vibrator 24, and a counterclockwise locus represents the behavior of the vibrator 24. In the diagram, the horizontal axis represents the rotational speed, and the vertical axis represents the displacement of the vibrator 24 (and the elastic member 26).

Here, the rotational speed of the horizontal axis is standardized. That is, the value on the horizontal axis is the relative rotational speed obtained by subtracting the angular speed dθ _O / dt of the output shaft 28 (to which the vibrator 24 is connected) from the rotational speed of the vibrator 24, and the natural frequency of the elastic member 26. The value divided by ω is shown. Therefore, in FIG. 3, the angular velocity dθO / dt of the output shaft 28 is converted to 0, and the case (velocity = 0) is plotted on the coordinates of −dθO / dt × 1 / ω.

  FIG. 4 shows the behavior of each part of the driving force transmission device 10 in the time series when the control A is executed. The first graph shows the change in the rotational speed of the vibrator 24. The horizontal axis represents time, and the vertical axis represents the rotational speed [rad / sec]. The second graph shows the displacement of the elastic member 26 (and the vibrator 24), with the horizontal axis representing time and the vertical axis representing displacement [rad]. The third graph shows the torque change due to the EG side clutch 18. The fourth graph shows the torque change due to the MG side clutch 20. The fifth graph shows the torque change due to the brake 22. The sixth graph shows the change in elastic torque (spring torque) caused by the elastic member 26. In the third to sixth graphs, the horizontal axis represents time, and the vertical axis represents torque [Nm]. Further, the time (horizontal axis) is synchronized for all the graphs from the first level to the sixth level.

  Time 0 in FIG. 4 corresponds to time 0 in FIG. In FIG. 3, when the locus is traced counterclockwise from the point of time 0, the rotational speeds of the vibrator 24 and the drive shaft 32 of the internal combustion engine 12 coincide. At this time, the control unit 30 switches the EG side clutch 18 from the released state to the engaged state, and executes control (first control) for connecting the vibrator 24 and the drive shaft 32 (first state).

  The elastic member 26 is pulled by connecting the vibrator 24 and the drive shaft 32. That is, the drive energy of the drive shaft 32 is converted into elastic energy of the elastic member 26 and accumulated (energy storage).

  In addition, in the first state, the drive shaft 32 and the output shaft 28 of the internal combustion engine 12 are connected via the elastic member 26. For example, when the elastic member 26 is formed of a torsion spring, when the internal combustion engine 12 is torsioned with the torsion spring, torque is transmitted from the torsion spring to the output shaft 28 as a reaction force. That is, part of the driving force of the internal combustion engine 12 is also transmitted to the output shaft 28 via the elastic member 26. The graph of the third stage of FIG. 4 illustrates a numerical value of 1.8 [Nm] as the average value Tin1 of the transmission torque (from the internal combustion engine 12 to the output shaft 28).

  After accumulating elastic energy in the elastic member 26, the control unit 30 switches the EG side clutch 18 from the engaged state to the released state and releases the connection between the vibrator 24 and the drive shaft 32 (second state) ( (Second control) is executed.

  Thereafter, when the rotational speed of the vibrator 24 coincides with the rotational speed of the rotor 34 of the rotating electrical machine 14 in powering, the control unit 30 switches the MG side clutch 20 from the released state to the engaged state, and the vibrator 24 and the rotor 34 (Third state) control (third control) is executed.

  The elastic member 26 is further pulled by connecting the vibrator 24 and the powering rotor 34. That is, the drive energy of the rotor 34 (rotating electrical machine 14) is converted into the elastic energy of the elastic member 26 and stored (energy storage).

  In the third state, the rotor 34 and the output shaft 28 are connected via the elastic member 26. At this time, part of the driving force of the rotor 34 is also transmitted to the output shaft 28 (via the elastic member 26). The numerical value of 4.7 [Nm] is illustrated as an average value Tin2 of the transmission torque in the graph of the fourth level in FIG.

  After accumulating elastic energy in the elastic member 26, the control unit 30 switches the MG side clutch 20 from the engaged state to the released state, and releases the connection between the vibrator 24 and the rotor 34 (fourth state). 4 control).

  Thereafter, when the rotational speed of the vibrator 24 becomes 0, that is, the same speed as the case (fixed portion), the control unit 30 switches the brake 22 from the released state to the engaged state, and fixes the vibrator 24 (fifth). State) control (fifth control) is executed. At this time, the elastic energy accumulated in the elastic member 26 by the internal combustion engine 12 and the rotating electrical machine 14 is transmitted to the output shaft 28 (energy release). In the fifth row in FIG. 4, a numerical value of 8.3 [Nm] is illustrated as the average value Tin3 of the transmission torque.

  After the energy is transmitted from the elastic member 26 to the output shaft 28, the control unit 30 switches the brake 22 from the engaged state to the released state, and releases the fixation of the vibrator 24 (sixth state) (sixth control). Execute.

  In the sixth stage (lowermost stage) in FIG. 4, the average value Tout of the torque transmitted from the internal combustion engine 12 and the rotating electrical machine 14 to the output shaft 28 via the elastic member 26 is the sum of Tin1 to Tin3. A numerical value of .8 is illustrated.

  Thereafter, the driving force (driving torque) is intermittently transmitted from the internal combustion engine 12 and the rotating electrical machine 14 to the output shaft 28 by sequentially repeating the first control to the sixth control.

<Control B: Internal combustion engine-> rotating electric machine + output shaft>
FIG. 5 illustrates an outline (power flow) of the control B. In this example, driving force (driving energy) is transmitted from the internal combustion engine 12 to the rotating electrical machine 14 and the output shaft 28 via the driving force transmission device 10.

  FIG. 6 illustrates a closed curve diagram of a driving example according to the control B. The vertical axis, horizontal axis, legend, etc. are the same as in FIG. FIG. 7 shows the behavior of each part of the driving force transmission device 10 in time series when the control B is executed. The graphs of the first to sixth stages show that the fourth stage (torque change of the brake 22) and the fifth stage (torque change of the MG side clutch 20) are replaced with those of FIG. The unit of the vertical axis and the horizontal axis, the legend, etc. are the same as in FIG.

  In FIG. 6, when the locus is traced counterclockwise from the point of time 0, the rotational speeds of the vibrator 24 and the drive shaft 32 of the internal combustion engine 12 coincide. At this time, the control unit 30 switches the EG side clutch 18 from the released state to the engaged state, and connects the vibrator 24 and the drive shaft 32 (first control). By connecting the vibrator 24 and the drive shaft 32, the drive energy of the drive shaft 32 is converted into the elastic energy of the elastic member 26 and stored (energy storage). The driving force of the internal combustion engine 12 is also transmitted to the output shaft 28 via the elastic member 26. The graph of the third stage in FIG. 7 illustrates the numerical value of 4.4 [Nm] as the average value Tin1 of the latter transmission torque.

  After accumulating elastic energy in the elastic member 26, the control unit 30 switches the EG side clutch 18 from the engaged state to the released state, and releases the connection between the vibrator 24 and the drive shaft 32 (second control).

  Thereafter, when the rotational speed of the vibrator 24 becomes 0, that is, the same speed as the case (fixed portion), the control unit 30 switches the brake 22 from the released state to the engaged state, and fixes the vibrator 24 (fifth). control). At this time, a part of the elastic energy accumulated in the elastic member 26 by the internal combustion engine 12 is transmitted to the output shaft 28 (energy release). In the fourth level of FIG. 7, a numerical value of 5 [Nm] is illustrated as the average value Tin2 of the transmission torque.

  After transmitting energy from the elastic member 26 to the output shaft 28, the control unit 30 switches the brake 22 from the engaged state to the released state, and releases the fixation of the vibrator 24 (sixth control).

  Thereafter, when the rotational speed of the vibrator 24 coincides with the rotational speed of the rotor 34 of the rotating electrical machine 14 that is being regenerated, the control unit 30 switches the MG side clutch 20 from the released state to the engaged state. Are connected (third control). Since the rotary electric machine 14 is under regenerative control, part of the elastic energy of the elastic member 26 is transmitted to the rotor 34 (rotary electric machine 14) (energy release). As a result, the rotating electrical machine 14 is regeneratively driven.

  In the third state, the rotor 34 and the output shaft 28 are connected via the elastic member 26. At this time, a part of the driving force of the output shaft 28 is transmitted to the regenerating rotor 34. The graph of the fifth stage in FIG. 7 illustrates a numerical value of −3.9 [Nm] as the average value Tin3 of the transmission torque. In addition, regarding the positive / negative sign of the transmission torque, transmission to the output shaft 28 is positive, and take-out from the output shaft 28 is negative.

  After transmitting the driving force from the elastic member 26 to the rotor 34, the control unit 30 switches the MG side clutch 20 from the engaged state to the released state, and releases the connection between the vibrator 24 and the rotor 34 (fourth control).

  In the sixth stage (lowermost stage) in FIG. 7, the average value Tout of the output torque from the internal combustion engine 12 and the rotating electrical machine 14 to the output shaft 28 via the elastic member 26 is the sum of Tin1 to Tin3. A numerical value of .5 is illustrated.

  Hereinafter, the driving force (driving torque) of the internal combustion engine 12 is changed to that of the rotating electrical machine 14 by switching the control in the order of the first control → the second control → the fifth control → the sixth control → the third control → the fourth control. The regenerative driving force and the driving force to the output shaft 28 are distributed. The order of distribution of the driving force may be changed, and the control may be executed in the order of the first control → second control → third control → fourth control → fifth control → sixth control.

<Control B *: Internal combustion engine → Rotating electric machine>
FIG. 8 illustrates an outline (power flow) of the control B *. Control B * is positioned as a special case of control B. That is, the control switching order (first control → second control → fifth control → sixth control → third control → fourth control) is the same as control B, but torque to the output shaft 28 and the rotating electrical machine 14. By adjusting the distribution, it is apparently controlled so that the driving force (driving torque) from the internal combustion engine 12 is all turned to the regenerative driving force (driving torque) to the rotating electrical machine 14.

  FIG. 9 illustrates a closed curve diagram of a driving example related to the control B *. The vertical axis, horizontal axis, legend, and the like are the same as in FIGS. FIG. 10 shows the behavior of each part of the driving force transmission device 10 in time series when the control B * is executed. The first to sixth graphs are the same as those in FIG. 7 in the vertical axis, horizontal axis, legend, and the like.

  In the third stage of FIG. 10, in the first control (EG side clutch ON), an average value Tin1 when a part of the driving force of the internal combustion engine 12 is transmitted to the output shaft 28 via the elastic member 26 is used. A numerical value of 2.9 [Nm] is illustrated.

  In the fourth stage of FIG. 10, as the average value Tin <b> 2 when a part of the elastic energy accumulated in the elastic member 26 is transmitted to the output shaft 28 in the fifth control (brake ON), 1. A numerical value of 5 [Nm] is illustrated.

  Further, in the fifth stage of FIG. 10, in the third control (MG side clutch ON), an average value Tin3 when a part of the driving force of the output shaft 28 is transmitted to the regenerating rotor 34 is −4. A numerical value of .4 [Nm] is illustrated.

  Further, in correspondence with the sum of these values Tin1 to Tin3, the sixth stage (lowermost stage) in FIG. 10 has 0 as the average value Tout of the output torque to the output shaft 28 via the elastic member 26. The numerical values are exemplified.

  Thus, in the control B, the driving torque transmitted to the output shaft 28 directly from the internal combustion engine 12 (first control) or via the elastic member 26 (fifth control), and the output shaft 28 in the third control. Therefore, the driving torque of the internal combustion engine 12 is all turned to the regenerative drive of the rotating electrical machine 14 by balancing the driving torque transmitted to the revolving rotating electrical machine 14 from the apparent (torque balance).

  In addition, the energy transmission in each control phase (1st control, 3rd control, 5th control) can each set conditions using the following numerical formula. First, transmission of energy in one clutch engagement (EG side clutch 18 and MG side clutch 20) can be expressed as the following mathematical formulas (1) and (2).

In Equations (1) and (2), E _in is input energy, W _in is input side rotational speed, W _out is output side rotational speed, ΔE _sp is energy accumulated in the elastic member 26, and E _out is output energy. Represent. Equation (1) represents the exchange of energy between the input and the elastic member 26, and Equation (2) represents the exchange of energy between the input and the output. Based on these mathematical formulas (1) and (2), the control unit 30 obtains an energy balance exchanged in each control face (first control, third control, and fifth control), and performs control B * accordingly. Execute.

Second Embodiment
FIG. 11 illustrates a driving force transmission device 10 according to the second embodiment. This driving force transmission device 10 is different from the first embodiment in that the brake 22 is provided between the EG side clutch 18 and the drive shaft 32 of the internal combustion engine 12, and the other structure is the first embodiment. It is the same. In addition, since the function of each component is basically the same as that of the first embodiment, the description thereof will be omitted as appropriate.

<Driving force transmission control>
12 to 23 show examples of driving force transmission control of the driving force transmission device 10 according to the second embodiment. There are several patterns for driving force transmission control. As will be described later, FIGS. 12 to 14 are control A, FIGS. 15 to 17 are control B, and FIGS. 18 to 20 are special cases of control B. Some control B * and FIGS. 21 to 23 illustrate control patterns of control C, respectively. 12 to 23, illustration of the load 16, the control unit 30, and the like is omitted as appropriate in order to simplify the illustration.

<Control A: Internal combustion engine + rotating electrical machine → output shaft>
FIG. 12 illustrates an outline (power flow) of the control A. In this example, the driving force (driving energy) of the internal combustion engine 12 and the rotating electrical machine 14 is transmitted to the output shaft 28 via the driving force transmission device 10.

  FIG. 13 illustrates a closed curve diagram of a driving example according to the control A. The vertical axis, horizontal axis, legend, and the like are the same as in FIGS.

  FIG. 14 shows the behavior of each part of the driving force transmission device 10 in the time series when the control A is executed. The first graph shows the change in the rotational speed of the vibrator 24. The horizontal axis represents time, and the vertical axis represents the rotational speed [rad / sec]. The second graph shows the displacement of the elastic member 26 (and the vibrator 24), with the horizontal axis representing time and the vertical axis representing displacement [rad]. The third graph shows the torque change due to the EG side clutch 18. The fourth graph shows the torque change due to the MG side clutch 20. The fifth graph shows the change of the elastic torque (spring torque) by the elastic member 26. In the third to fifth graphs, the horizontal axis represents time, and the vertical axis represents torque [Nm]. In addition, the time (horizontal axis) is synchronized for all graphs from the first level to the fifth level.

  Time 0 in FIG. 14 corresponds to time 0 in FIG. In FIG. 13, when the locus is traced counterclockwise from the point of time 0, the rotational speeds of the vibrator 24 and the drive shaft 32 of the internal combustion engine 12 coincide. At this time, the control unit 30 switches the EG side clutch 18 from the released state to the engaged state, and connects the vibrator 24 and the drive shaft 32 (first control).

  The elastic member 26 is pulled by connecting the vibrator 24 and the drive shaft 32. That is, the drive energy of the drive shaft 32 is converted into elastic energy of the elastic member 26 and accumulated (energy storage).

  In addition, in the first state, the drive shaft 32 and the output shaft 28 of the internal combustion engine 12 are connected via the elastic member 26. The graph of the third stage in FIG. 14 illustrates a numerical value of 2.6 [Nm] as the average value Tin1 of the transmission torque (from the internal combustion engine 12 to the output shaft 28).

  After accumulating elastic energy in the elastic member 26, the control unit 30 switches the EG side clutch 18 from the engaged state to the released state, and releases the connection between the vibrator 24 and the drive shaft 32 (second control).

  Thereafter, when the rotational speed of the vibrator 24 coincides with the rotational speed of the rotor 34 of the rotating electrical machine 14 in powering, the control unit 30 switches the MG side clutch 20 from the released state to the engaged state, and the vibrator 24 and the rotor 34 Are connected (third control).

  At this time, in addition to the elastic energy of the elastic member 26 (energy release), the driving energy of the rotating electrical machine 14 is transmitted to the output shaft 28. For example, when the rotor 34 of the rotating electrical machine 14 is fixed (locked), the vibrator 24 is locked in the third state. Therefore, the state is the same as in the fifth control (brake on) of the first embodiment. Become. At this time, the elastic energy of the elastic member 26 is transmitted to the output shaft 28. In addition to this state, when the rotating electrical machine 14 is powered, the driving force is transmitted to the output shaft 28 via the elastic member 26.

  The fourth level of FIG. 14 illustrates a numerical value of 5.2 [Nm] as an average value Tin2 of torque (driving energy) transmitted to the output shaft 28 in the third state.

  After the third state, the control unit 30 switches the MG side clutch 20 from the engaged state to the released state, and releases the connection between the vibrator 24 and the rotor 34 (fourth control).

  Thereafter, the driving force (driving torque) is intermittently transmitted from the internal combustion engine 12 and the rotating electrical machine 14 to the output shaft 28 by sequentially repeating the first control to the fourth control. In the fifth stage of FIG. 14, the average value Tout of the output torque from the internal combustion engine 12 and the rotating electrical machine 14 to the output shaft 28 via the elastic member 26 is 7.8, which is the sum of Tin1 and Tin2. Numerical values are illustrated.

<Control B: Internal combustion engine-> rotating electric machine + output shaft>
FIG. 15 illustrates an outline (power flow) of the control B. In this example, driving force (driving energy) is transmitted from the internal combustion engine 12 to the rotating electrical machine 14 and the output shaft 28 via the driving force transmission device 10.

  FIG. 16 illustrates a closed curve diagram of a driving example according to the control B. The vertical axis, horizontal axis, legend, and the like are the same as in FIG. FIG. 17 shows the behavior of each part of the driving force transmission device 10 in time series when the control B is executed. The vertical axis, horizontal axis units, legends, etc. in the first to fifth graphs are the same as in FIG.

  In FIG. 16, when the locus is traced counterclockwise from the point of time 0, the rotational speeds of the vibrator 24 and the drive shaft 32 of the internal combustion engine 12 coincide. At this time, the control unit 30 switches the EG side clutch 18 from the released state to the engaged state, and connects the vibrator 24 and the drive shaft 32 (first control). By connecting the vibrator 24 and the drive shaft 32, the drive energy of the drive shaft 32 is converted into the elastic energy of the elastic member 26 and stored (energy storage). The driving force of the internal combustion engine 12 is also transmitted to the output shaft 28 via the elastic member 26. The graph of the third stage in FIG. 17 illustrates a numerical value of 5.2 [Nm] as the average value Tin1 of the latter transmission torque.

  After accumulating elastic energy in the elastic member 26, the control unit 30 switches the EG side clutch 18 from the engaged state to the released state, and releases the connection between the vibrator 24 and the drive shaft 32 (second control).

  Thereafter, when the rotational speed of the vibrator 24 coincides with the rotational speed of the rotor 34 of the rotating electrical machine 14 that is being regenerated, the control unit 30 switches the MG side clutch 20 from the released state to the engaged state. Are connected (third control). Since the rotary electric machine 14 is under regenerative control, part of the elastic energy of the elastic member 26 is transmitted to the rotor 34 (rotary electric machine 14) (energy release). As a result, the rotating electrical machine 14 is regeneratively driven.

  In the third state, the rotor 34 and the output shaft 28 are connected via the elastic member 26. At this time, a part of the driving force of the output shaft 28 is transmitted to the regenerating rotor 34. In the graph of the fourth stage in FIG. 17, a numerical value of −2.6 [Nm] is illustrated as the average value Tin2 of the transmission torque.

  After transmitting the driving force from the elastic member 26 to the rotor 34, the control unit 30 switches the MG side clutch 20 from the engaged state to the released state, and releases the connection between the vibrator 24 and the rotor 34 (fourth control).

  In the fifth stage (lowermost stage) in FIG. 17, the average value Tout of the output torque from the internal combustion engine 12 and the rotating electrical machine 14 to the output shaft 28 via the elastic member 26 is the sum of Tin1 and Tin2. A numerical value of .6 is illustrated.

  Hereinafter, by switching the control from the first control to the fourth control in order, the driving force (driving torque) of the internal combustion engine 12 is distributed between the regenerative driving force of the rotating electrical machine 14 and the driving force to the output shaft 28. .

<Control B *: Internal combustion engine → Rotating electric machine>
FIG. 18 illustrates an outline (power flow) of the control B *. Control B * is positioned as a special case of control B. That is, the control switching order (first control → second control → third control → fourth control) is the same as that of control B, but the torque distribution to the output shaft 28 and the rotating electrical machine 14 is adjusted to make it apparent. The driving force (driving torque) from the internal combustion engine 12 is controlled so as to be all turned to the regenerative driving force (driving torque) to the rotating electrical machine 14.

  FIG. 19 illustrates a closed curve diagram of a driving example related to the control B *. The vertical axis, horizontal axis, legend, and the like are the same as those in FIGS. FIG. 20 shows the behavior of each part of the driving force transmission device 10 in time series when the control B * is executed. The first to fifth graphs are the same as those in FIGS. 14 and 17 in the vertical axis, the horizontal axis, and the legend.

  In the third stage of FIG. 20, in the first control (EG clutch ON), an average value Tin1 when a part of the driving force of the internal combustion engine 12 is transmitted to the output shaft 28 via the elastic member 26 is used. A numerical value of 4.9 [Nm] is illustrated.

  Further, in the fourth stage of FIG. 20, in the third control (MG side clutch ON), the average value Tin2 when a part of the driving force of the output shaft 28 is transmitted to the regenerating rotor 34 is −4. A numerical value of .9 [Nm] is illustrated.

  Further, corresponding to the sum of these values Tin1 and Tin2, the fifth stage (lowermost stage) in FIG. 20 has 0 as the average value Tout of the output torque to the output shaft 28 via the elastic member 26. The numerical values are exemplified.

  Thus, in the control B, the drive torque (first control) transmitted from the internal combustion engine 12 to the output shaft 28 and the drive torque (third control) transmitted from the output shaft 28 to the rotating electrical machine 14 being regenerated. By balancing, apparently (in terms of torque balance), the driving force of the internal combustion engine 12 is all turned to the regenerative drive of the rotating electrical machine 14.

<Control C: rotating electric machine → output shaft>
FIG. 21 illustrates an outline (power flow) of the control C. In this example, a driving force (driving torque) is transmitted from the rotating electrical machine 14 to the output shaft 28 via the driving force transmission device 10. The control C corresponds to so-called EV traveling in which the driving force is transmitted to the output shaft 28 by the rotating electrical machine 14 alone when the internal combustion engine 12 is in a stopped state (resting state).

  The control unit 30 performs a control (seventh control) in which the brake 22 is always engaged (on), that is, the drive shaft 32 is fixed (seventh state), and the engagement (fixed) is released. Control (eighth control) is possible. In executing the control C, the control unit 30 executes the seventh control and always locks the drive shaft 32.

  FIG. 22 illustrates a closed curve diagram of a driving example according to the control C. The vertical axis, horizontal axis, legend, etc. are the same as in FIG. In FIG. 23, the behavior of each part of the driving force transmission device 10 when the control C is executed is shown in time series. Compared to FIG. 20, the graphs of the third stage and the fourth stage of the graphs of the first to fifth stages are interchanged. In FIG. 23, the third stage is the MG side clutch. The torque change by 20 and the 4th stage show the torque change by the EG side clutch 18. Other vertical and horizontal axis units and legends are the same as those in FIG.

  In FIG. 22, when the locus is traced counterclockwise from the point of time 0, the rotational speeds of the vibrator 24 and the rotor 34 of the rotating electrical machine 14 coincide. At this time, the control unit 30 switches the MG side clutch 20 from the released state to the engaged state, and connects the vibrator 24 and the rotor 34 (third control). By connecting the vibrator 24 and the rotor 34, the driving energy of the rotating electrical machine 14 is converted into the elastic energy of the elastic member 26 and accumulated (energy storage). Further, the driving force of the rotating electrical machine 14 is transmitted to the output shaft 28 via the elastic member 26. The third graph in FIG. 23 illustrates a numerical value of 5.2 [Nm] as the average value Tin1 of the latter transmission torque.

  After accumulating elastic energy in the elastic member 26, the control unit 30 switches the MG side clutch 20 from the engaged state to the released state, and releases the connection between the vibrator 24 and the rotor 34 (fourth control).

  Thereafter, when the rotational speed of the vibrator 24 reaches 0, the control unit 30 switches the EG side clutch 18 from the released state to the engaged state (first control). At this time, the drive shaft 32 is locked to the brake 22 and the rotation speed is zero.

  At this time, one end of the elastic member 26 is fixed by the brake 22 via the EG side clutch 18. Accordingly, the elastic energy of the elastic member 26 is transmitted to the output shaft 28 connected to the other end of the elastic member 26 (energy release). By locking the drive shaft 32 with the brake 22, it is possible to prevent elastic energy from escaping (escaping) into the internal combustion engine 12 during the first control. The fourth graph in FIG. 23 illustrates a numerical value of 2.6 [Nm] as the average value Tin2 of the transmission torque at this time.

  After the first control, the control unit 30 switches the EG side clutch 18 from the engaged state to the released state, and releases the connection between the vibrator 24 and the drive shaft 32 (second control).

  Thereafter, the driving force (driving torque) is intermittently transmitted from the rotating electrical machine 14 to the output shaft 28 by sequentially repeating the processes of the third control → the fourth control → the first control → the second control. The fifth stage of FIG. 23 illustrates a numerical value of 7.8, which is the sum of Tin1 and Tin2, as an average value Tout of the output torque from the rotating electrical machine 14 to the output shaft 28 via the elastic member 26. ing.

  DESCRIPTION OF SYMBOLS 10 Driving force transmission device, 12 Internal combustion engine, 14 Rotating electrical machine, 16 Load, 18 Internal combustion engine side clutch (connection part to 1st rotation part), 20 Rotation electrical machine side clutch (connection part to 3rd rotation part), 22 Brake, 24 vibrator, 26 elastic member, 28 output shaft (second rotating portion), 30 control portion, 32 drive shaft (first rotating portion), 34 rotor (third rotating portion), 35 stator.

Claims (15)

A connecting part to the first rotating part;
A second rotating part;
A connection to the third rotating part;
An elastic member;
A vibrator,
With
One end of the elastic member is fixed to the second rotating part,
The other end of the elastic member is fixed to the vibrator,
The vibrator is in any one of a first state in which the vibrator is connected to the first rotating part via a connection part to the first rotating part and a second state in which the connection with the first rotating part is released. Is possible and
The vibrator is in any one of a third state in which the vibrator is connected to the third rotating part via a connection part to the third rotating part and a fourth state in which the connection with the third rotating part is released. Is possible,
Driving force transmission device. The driving force transmission device according to claim 1,
With control means,
The control means
A first control for controlling the vibrator to a first state;
A second control for controlling the vibrator to the second state;
A third control for controlling the vibrator to the third state;
A fourth control for controlling the vibrator to a fourth state;
It is possible to perform a driving force transmission device. The driving force transmission device according to claim 2,
The first rotating part is a drive shaft of the internal combustion engine,
The first state is a state where the vibrator and the drive shaft of the internal combustion engine are connected,
The second state is a state in which the connection between the vibrator and the drive shaft of the internal combustion engine is released.
Driving force transmission device. The driving force transmission device according to claim 3,
The third rotating part is a rotor of a rotating electrical machine,
The third state is a state where the vibrator and the rotor are connected,
The fourth state is a state in which the connection between the vibrator and the rotor is released.
Driving force transmission device. The driving force transmission device according to claim 4,
The second rotating unit is an output shaft connected to the load.
Driving force transmission device. The driving force transmission device according to claim 5,
The control means
Control A for transmitting the driving energy transmitted from the first rotating unit and the third rotating unit to the second rotating unit;
A control B for transmitting the driving energy input from the first rotating unit to the second rotating unit and the third rotating unit;
It is possible to selectively control any one of
Driving force transmission device The driving force transmission device according to any one of claims 1 to 6,
The control means
A fifth control for controlling the vibrator to a fifth state;
A sixth control for controlling to a sixth state for releasing the fixation of the vibrator;
Is possible,
Driving force transmission device. The driving force transmission device according to claim 7, which is dependent on claim 6,
The control means is as control A,
After executing the first control and storing the driving energy of the first rotating part as the elastic energy of the elastic member, the process proceeds to the second control,
After executing the third control and accumulating the drive energy of the third rotating part in the power running state as the elastic energy of the elastic member, the process proceeds to the fourth control,
After executing the fifth control and transmitting the elastic energy of the elastic member accumulated in the first and third controls as the driving energy of the second rotating part, the process proceeds to the sixth control.
Driving force transmission device. The driving force transmission device according to claim 7, which is dependent on claim 6,
The control means is as control B,
After executing the first control and accumulating the drive energy of the first rotating part as the elastic energy of the elastic member, the process proceeds to the second control,
After executing the fifth control and transmitting a part of the accumulated elastic energy of the elastic member as the driving energy of the second rotating part, the process proceeds to the sixth control,
After executing the third control and transmitting the other part of the accumulated elastic energy of the elastic member as the driving energy of the third rotating portion in the regenerative state, the process proceeds to the fourth control.
Driving force transmission device. The driving force transmission device according to claim 9,
The control means is as control B,
A sum of energy transmitted from the first rotating part to the second rotating part via the elastic member at the time of execution of the first control, and energy transmitted from the elastic member to the second rotating part at the time of execution of the fifth control; When executing the third control, the energy transmitted from the second rotating part to the third rotating part via the elastic member is balanced.
Driving force transmission device. The driving force transmission device according to claim 6,
The control means is as control A,
After executing the first control and accumulating the drive energy of the first rotating part as the elastic energy of the elastic member, the process proceeds to the second control,
After executing the third control and driving the third rotating part to power running, after transmitting the elastic energy of the elastic member accumulated by the first control and the driving energy of the third rotating part as the driving energy of the second rotating part Shift to fourth control,
Driving force transmission device. The driving force transmission device according to claim 6,
The control means is as control B,
After executing the first control and accumulating the drive energy of the first rotating part as the elastic energy of the elastic member, the process proceeds to the second control,
The third control is executed to transmit a part of the elastic energy of the elastic member accumulated by the first control as the driving energy of the third rotating part in the regenerative state, and the other part of the elastic energy is transmitted to the second As the driving energy of the part, and then shift to the fourth control,
Driving force transmission device. The driving force transmission device according to claim 12,
The control means is as control B,
When the first control is executed, the energy transmitted from the first rotating part to the second rotating part via the elastic member and when the third control is executed, the energy is transmitted from the second rotating part to the third rotating part via the elastic member. To balance the energy
Driving force transmission device. The driving force transmission device according to any one of claims 1 to 13,
The control means
A seventh control for fixing the first rotating part;
An eighth control for releasing the fixation of the first rotating unit;
Is possible,
Driving force transmission device. The driving force transmission device according to claim 14, which is dependent on claim 5,
The control means
After executing the third control and accumulating the drive energy of the third rotating part in the power running state as the elastic energy of the elastic member, the process proceeds to the fourth control,
The first control is executed during the execution of the seventh control, and the elastic energy of the elastic member is transferred as the driving energy of the second rotating part, and then the second control is performed.
Driving force transmission device.

Images