JP2014231774A - Oil pump device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an oil pump device having an internal combustion engine drive source and a motor, capable of suppressing increase of the size in the radial direction.SOLUTION: An oil pump device 100 includes an internal combustion engine drive source 3 transferring driving force of an internal combustion engine to an inner rotor 11 of an oil pump 1 having the inner rotor 11 and an outer rotor 12, a motor 2 rotationally driving the inner rotor 11 of the oil pump 1, and drive source switch means 4 switching a drive source of the inner rotor 11 of the oil pump 1 to at least one of the motor 2 and the internal combustion engine drive source 3. The drive source switch means 4 includes OSV 41 which turns on and off hydraulic pressure from the oil pump 1. The oil pump device 100 is configured such that the ON/OFF control of the OSV 41 performs the switch to at least one of the motor 2 or the internal combustion engine drive source 3 to drive the inner rotor 11.

Description

  The present invention relates to an oil pump device.

  2. Description of the Related Art Conventionally, an oil pump device that includes both an internal combustion engine drive source that uses the drive force of an engine and a motor as a drive source for rotationally driving the oil pump is known (see, for example, Patent Document 1).

  Patent Document 1 discloses an engine input shaft that transmits engine driving force to an inner rotor of an oil pump including an inner rotor and an outer rotor, an electric motor that rotationally drives the outer rotor of the oil pump, and rotation of the engine input shaft. Discloses an oil pump device including a clutch that switches between a connected state for transmitting to the inner rotor and a disconnected state for blocking transmission. In Patent Document 1, the electric motor is disposed on the outer side in the radial direction of the outer rotor, and the outer rotor is directly driven to rotate by the cylindrical rotor of the electric motor.

JP 2012-159167 A

  However, in the oil pump device disclosed in Patent Document 1, the outer rotor is driven by the cylindrical rotor of the electric motor, and therefore it is necessary to dispose the electric motor on the radially outer side of the outer rotor. For this reason, there exists a problem that an oil pump apparatus becomes large in radial direction.

  The present invention has been made to solve the above-described problems, and one object of the present invention is to suppress an increase in the radial direction of an oil pump device including an internal combustion engine drive source and a motor. An oil pump device is provided.

  In order to achieve the above object, an oil pump device according to one aspect of the present invention includes an internal combustion engine drive source that transmits a drive force of an internal combustion engine to an inner rotor of an oil pump that includes an inner rotor and an outer rotor. A motor that rotationally drives the inner rotor of the oil pump; and drive source switching means that switches a drive source of the inner rotor of the oil pump to at least one of a motor and an internal combustion engine drive source. And a control valve for turning on and off the hydraulic pressure, and the inner rotor is driven by switching to at least one of a motor and an internal combustion engine drive source by hydraulic pressure on / off control by the control valve.

  In the oil pump device according to one aspect of the present invention, as described above, the internal combustion engine drive source that transmits the driving force of the internal combustion engine to the inner rotor of the oil pump including the inner rotor and the outer rotor, By providing a motor that rotationally drives the inner rotor, the motor rotationally drives the inner rotor instead of the outer rotor, so there is no need to arrange the motor on the outer side in the radial direction of the outer rotor. Thereby, it can suppress that the oil pump apparatus provided with the internal combustion engine drive source and the motor becomes large in the radial direction. Also, by providing a drive source switching means for switching to at least one of the motor and the internal combustion engine drive source, unlike when rotating the oil pump only with the internal combustion engine drive source, switching to drive the oil pump with the motor, Regardless of the number of revolutions of the internal combustion engine, oil having an optimum pressure for the internal combustion engine can be supplied from the oil pump device. Moreover, the timing for switching the drive source can be arbitrarily set by switching the drive source of the oil pump to at least one of the motor and the internal combustion engine drive source by hydraulic on / off control by the control valve.

  In the oil pump device according to the above aspect, the drive source switching means preferably includes an engagement member that can be engaged with the internal combustion engine drive source side and the motor side, and the engagement member is controlled to turn on the hydraulic pressure by the control valve. Sometimes, the motor or the internal combustion engine drive source is switched to the first engagement state in which the driving force of the motor or the internal combustion engine drive source is transmitted to the inner rotor. It is comprised so that it may switch to the 2nd engagement state which transmits a driving force to an inner rotor. If comprised in this way, the engagement state of an engagement member can be switched and the drive source of an oil pump can be easily switched to either an internal combustion engine drive source or a motor.

  In the configuration in which the drive source switching means includes the engagement member, preferably, in the first engagement state, the engagement member is engaged with the internal combustion engine drive source side and disengaged from the motor side. Thus, the driving force of the motor is transmitted to the inner rotor without passing through the engaging member, and in the second engagement state, the engaging member is engaged with both the motor side and the internal combustion engine drive source side, The driving force of the internal combustion engine drive source is configured to be transmitted to the inner rotor via the engagement member and the motor. According to this configuration, in the first engagement state, the driving force of the internal combustion engine drive source is not transmitted to the inner rotor, and only the driving force of the motor is transmitted to the inner rotor. The oil pump can be driven by the motor. Further, in the second engagement state, the drive of the internal combustion engine drive source is transmitted to the inner rotor through the motor, so that the oil pump can be driven by adjusting the drive force from the motor to the drive force from the internal combustion engine. it can. Thereby, an oil pump can be driven efficiently.

  In the configuration in which the drive source switching means includes the engagement member, preferably, the motor includes a motor shaft extending to the oil pump side, and the internal combustion engine drive source extends to the oil pump side and is coaxial with the motor shaft. The engaging member includes a drive shaft that is arranged to face each other and transmits a driving force, and the engaging member engages the motor shaft and the driving shaft so as to be able to transmit the driving force, and has a first engagement state and a second engagement. The engagement state with respect to the motor shaft and the drive shaft is switched according to the combined state. With this configuration, the motor shaft of the motor and the drive shaft of the internal combustion engine drive source can be arranged coaxially, and the motor and the internal combustion engine drive source can be arranged side by side in the direction in which the shaft extends. It is possible to easily suppress the oil pump device including the internal combustion engine drive source and the motor from increasing in the radial direction.

  In the configuration in which the drive source switching unit includes the engagement member, preferably, the drive source switching unit is engaged in a second direction opposite to the first direction in which the engagement member is pressurized when the hydraulic pressure is controlled by the control valve. A biasing member that biases the combined member is further included, and when the hydraulic pressure is controlled by the control valve, the engagement member is moved in the first direction against the biasing force by the biasing member by the hydraulic pressure, and is in the first engagement state. When the hydraulic pressure is controlled by the control valve, the engagement member is moved in the second direction by the urging force of the urging member and switched to the second engagement state. If comprised in this way, while being able to switch to a 1st engagement state reliably by oil_pressure | hydraulic at the time of oil pressure on control, it can be reliably switched to a 2nd engagement state by an urging | biasing member at the time of oil pressure off control. Further, when the hydraulic pressure is low, the urging member is brought into the second engagement state. Therefore, even when the hydraulic pressure at the start of the internal combustion engine is low and the oil viscosity is high, the oil pump is driven by the internal combustion engine drive source. be able to. For example, when the oil pressure at the start of the internal combustion engine is low, the oil pump can be driven by the internal combustion engine drive source.

  In the oil pump device according to the above aspect, preferably, the motor and the internal combustion engine drive source include a motor main body and a drive transmission mechanism, respectively, and the motor main body includes an inner rotor and an outer rotor. The drive transmission mechanism is disposed on the other side in the axial direction of the oil pump with respect to the oil pump. According to this structure, the oil pump is disposed in a well-balanced manner between the motor main body and the drive transmission mechanism, and the oil pump device including the internal combustion engine drive source and the motor is prevented from becoming large in the radial direction. Can do.

  In the oil pump device according to the above aspect, the motor is preferably always connected to the inner rotor so as to rotate together with the inner rotor, and the driving force of the internal combustion engine driving source is transmitted to the inner rotor by the driving source switching means. When the switching is performed, the driving force of the internal combustion engine driving source is transmitted to the inner rotor through the motor, and the driving source switching means switches so that the driving force of the motor is transmitted to the inner rotor. In such a case, the driving force of the motor is configured to be transmitted directly to the inner rotor without going through the internal combustion engine drive source. With this configuration, when the driving force of the motor is switched to be transmitted to the inner rotor, the driving force of the internal combustion engine drive source is not transmitted to the inner rotor, and only the driving force of the motor is transmitted to the inner rotor. Therefore, the oil pump can be driven by the motor regardless of the rotational speed of the internal combustion engine. Further, when the driving force of the internal combustion engine drive source is switched to be transmitted to the inner rotor, the drive of the internal combustion engine drive source is transmitted to the inner rotor via the motor, so that the driving force from the internal combustion engine is The oil pump can be driven by adjusting the driving force of the motor. Thereby, an oil pump can be driven efficiently.

  In the oil pump device according to the above aspect, preferably, when the drive source of the inner rotor is switched from the internal combustion engine drive source to the motor by the drive source switching means, the motor is rotated and then the hydraulic pressure by the control valve is driven. Is configured to perform on / off control. According to this configuration, when the drive source is switched, the rotation shaft of the internal combustion engine drive source side and the rotation shaft of the motor are rotated by driving the motor to follow the rotational speed of the rotation shaft of the internal combustion engine drive source side. Therefore, the inner rotor drive source can be smoothly switched from the internal combustion engine drive source to the motor.

  In this case, preferably, when the drive source of the inner rotor is switched from the internal combustion engine drive source to the motor by the drive source switching means, the motor is rotationally driven so that the rotational speed of the motor is close to the rotational speed of the internal combustion engine drive source. After the number of rotations is reached, hydraulic pressure on / off control is performed by the control valve. With this configuration, when the drive source is switched, the rotation speed of the motor rotation shaft can be adjusted to a rotation speed in the vicinity of the rotation speed of the rotation shaft on the internal combustion engine drive source side. Since the load applied between the rotating shaft and the rotating shaft of the motor can be made substantially zero, the driving source of the inner rotor can be smoothly switched from the driving source of the internal combustion engine by the motor.

  In the present application, apart from the oil pump device according to the above aspect, the following other configurations are also conceivable.

(Additional notes)
That is, an oil pump device according to another configuration of the present application is disposed on one axial side of an inner rotor of an oil pump including an inner rotor and an outer rotor, and transmits the driving force of the internal combustion engine to the inner rotor. An internal combustion engine drive source, a motor that is arranged on the other side in the axial direction of the inner rotor, and that rotates the inner rotor of the oil pump, and a drive source of the oil pump inner rotor is at least one of the motor and the internal combustion engine drive source Drive source switching means for switching. If comprised in this way, since a motor drives the inner rotor instead of an outer rotor, it is not necessary to arrange | position a motor on the radial direction outer side of an outer rotor. Thereby, it can suppress that the oil pump apparatus provided with the internal combustion engine drive source and the motor becomes large in the radial direction. Also, by providing a drive source switching means for switching to at least one of the motor and the internal combustion engine drive source, unlike when rotating the oil pump only with the internal combustion engine drive source, switching to drive the oil pump with the motor, Regardless of the rotational speed of the internal combustion engine, the optimum oil for the internal combustion engine can be supplied from the oil pump device.

  According to the present invention according to the above aspect, as described above, it is possible to prevent the oil pump device including the internal combustion engine drive source and the motor from increasing in the radial direction.

It is the block diagram which showed the structure of the oil pump apparatus by one Embodiment of this invention. It is sectional drawing which showed the case where OSV of the oil pump apparatus by one Embodiment of this invention is an OFF state. It is sectional drawing which showed the case where OSV of the oil pump apparatus by one Embodiment of this invention is an ON state. FIG. 3 is a cross-sectional view taken along line 200-200 in FIG. 2. It is a flowchart for demonstrating the drive source switching process by the motor control part of the oil pump apparatus by one Embodiment of this invention. It is sectional drawing which showed the oil pump by the modification of the oil pump apparatus by one Embodiment of this invention.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  With reference to FIGS. 1-4, the structure of the oil pump apparatus 100 by one Embodiment of this invention is demonstrated.

  The oil pump device 100 is mounted on an automobile (not shown), and is configured to circulate and supply engine oil to an internal combustion engine (engine) of the automobile. Further, as shown in FIG. 1, the oil pump device 100 includes an oil pump 1, a motor 2, an internal combustion engine drive source 3, a drive source switching unit 4, and a motor control unit 5.

  As shown in FIGS. 2 and 4, the oil pump 1 includes an inner rotor 11 and an outer rotor 12. Further, as shown in FIG. 2, the oil pump 1 includes a suction portion 13, a discharge portion 14, a switching oil flow path 15, and an oil return portion 16.

  As shown in FIG. 2, the motor 2 includes a housing 21, a motor shaft 22, a rotor part 23, a stator part 24, and a connector 25. Further, the motor shaft 22 is formed with an engagement hole 221, a switching oil passage 222, and a groove portion 223.

  As shown in FIG. 2, the internal combustion engine drive source 3 includes a drive shaft 31 and a drive transmission mechanism 32. An engagement hole 311 and an oil discharge part 312 are formed in the drive shaft 31.

  As shown in FIG. 2, the drive source switching unit 4 includes an OSV (oil switching valve) 41, an engagement member 42, and a spring member 43 including a compression coil spring. The OSV 41 is an example of the “control valve” in the present invention, and the spring member 43 is an example of the “biasing member” in the present invention.

  The oil pump 1 is configured to suck up engine oil from an oil pan (not shown) and supply it to an internal combustion engine via an oil filter (not shown). Specifically, the oil pump 1 is configured to suck up engine oil from the suction portion 13 and discharge engine oil from the discharge portion 14. Moreover, the oil pump 1 is comprised by the trochoid type oil pump, as shown in FIG. That is, the oil pump 1 is configured to suck and discharge oil by a change in spatial volume caused by a rotation difference between the rotation of the inner rotor 11 and the rotation of the outer rotor 12.

  In the oil pump 1, the outer surface 22 a of the motor shaft 22 of the motor 2 is connected to the surface of the through hole 11 a at the center of the inner rotor 11 as shown in FIG. 2. The oil pump 1 is configured such that the inner rotor 11 is rotationally driven by at least one of the motor 2 or the internal combustion engine drive source 3. The outer rotor 12 is rotated with the rotation of the inner rotor 11.

  The switching oil passage 15 is formed so that oil controlled by the drive source switching means 4 (OSV 41) passes therethrough. The oil return portion 16 is a passage connecting the inside of the housing 21 of the motor 2 and the suction portion 13, and is provided to return (suck) the oil accumulated in the housing 21 toward the suction portion 13. Yes.

  The motor 2 is configured to drive the oil pump 1 by rotating the inner rotor 11. The motor 2 is always connected to the inner rotor 11 so as to rotate together with the inner rotor 11.

  The housing 21 stores the motor main body 2a (the rotor portion 23 and the stator portion 24) and the connector 25. The motor main body 2a is arranged on one side (A2 direction side) of the oil pump 1 in the axial direction with respect to the oil pump 1.

  The motor shaft 22 is configured to extend to the oil pump 1 side. Further, the end of the motor shaft 22 on the A2 direction side is connected to the rotor portion 23 and is configured to rotate together with the rotor portion 23. The motor shaft 22 is connected to the inner rotor 11 of the oil pump 1 at the outer surface 22a at the end on the oil pump 1 side (A1 direction side). Further, the motor shaft 22 has a substantially regular hexagonal engagement hole 221 formed at the end on the oil pump 1 side. The engagement member 221 of the drive source switching means 4 is configured to be engageable with the engagement hole 221.

  The switching oil passage 222 formed inside the motor shaft 22 is formed so that oil controlled by the drive source switching means 4 (OSV 41) passes therethrough. Further, the switching oil flow path 222 is configured to connect the engagement hole 221 and the switching oil flow path 15 of the oil pump 1. Further, a groove 223 is formed along the outer periphery of the motor shaft 22 at the boundary between the switching oil passage 15 and the switching oil passage 222 of the oil pump 1. Thus, the oil controlled by the drive source switching means 4 (OSV 41) can pass through the switching oil flow path 222 regardless of the rotational position of the motor shaft 22.

  The rotor portion 23 is provided with a permanent magnet (not shown) and is configured to rotate together with the motor shaft 22. The stator portion 24 includes a winding, and is configured to rotate the rotor portion 23 when three-phase AC power is supplied to the winding. The connector 25 is configured to supply electric power supplied from the outside to the stator unit 24.

  The internal combustion engine drive source 3 is configured to transmit the driving force of the internal combustion engine (engine) to the inner rotor 11 of the oil pump 1 to be rotationally driven. Specifically, the internal combustion engine drive source 3 is configured to drive the oil pump 1 by transmitting a drive force to the inner rotor 11 via the engagement member 42 and the motor shaft 22 of the motor 2. .

  The drive shaft 31 is configured to transmit the driving force of the internal combustion engine (engine) to the oil pump 1 via the drive transmission mechanism 32. The drive shaft 31 is configured to extend to the oil pump 1 side (A2 direction side). The drive shaft 31 is disposed so as to face the motor shaft 22 on the same axis. Further, the drive shaft 31 has a substantially regular hexagonal engagement hole 311 formed at the end on the oil pump 1 side. In the engagement hole 311, the engagement member 42 of the drive source switching unit 4 can be engaged.

  An oil discharge path 312 formed inside the drive shaft 31 is connected to the engagement hole 311 and is configured to discharge the oil in the engagement hole 311 to the outside. Specifically, when the OSV 41 of the drive source switching unit 4 is in the ON state, the engagement member 42 is moved to the internal combustion engine drive source 3 side (A1 direction side), and the oil in the engagement hole 311 is transferred to the oil discharge path. It is discharged to the outside via 312.

  The drive transmission mechanism 32 includes gears or sprockets, and is configured to transmit the driving force of the internal combustion engine to the drive shaft 31. The drive transmission mechanism 32 is disposed on the other side (A1 direction side) of the oil pump 1 in the axial direction with respect to the oil pump 1.

  The drive source switching means 4 is configured to switch the drive source of the inner rotor 11 of the oil pump 1 to at least one of the motor 2 and the internal combustion engine drive source 3. The OSV 41 of the drive source switching unit 4 is configured to turn on and off the hydraulic pressure from the oil pump 1. Further, the engagement member 42 of the drive source switching means 4 is configured to be engageable with the internal combustion engine drive source 3 side and the motor 2 side. Further, as shown in FIG. 4, the engaging member 42 is formed in a regular hexagonal cross section. The spring member 43 of the drive source switching means 4 is configured to urge the engagement member 42 in the A2 direction opposite to the A1 direction in which the engagement member 42 is hydraulically applied when the hydraulic pressure is controlled by the OSV 41. Yes. Further, the drive source switching means 4 is configured to drive the inner rotor 11 by switching to at least one of the motor 2 or the internal combustion engine drive source 3 by controlling on / off of the hydraulic pressure by the OSV 41.

  Specifically, the engagement member 42 of the drive source switching unit 4 is switched to the first engagement state in which the driving force of the motor 2 is transmitted to the inner rotor 11 when the hydraulic pressure is controlled by the OSV 41 (see FIG. 3). At the same time, it is configured to switch to the second engagement state in which the driving force of the internal combustion engine drive source 3 is transmitted to the inner rotor 11 when the hydraulic pressure is controlled to be off by the OSV 41 (see FIG. 2).

  That is, as shown in FIG. 3, in the first engagement state, the engagement member 42 is engaged with the internal combustion engine drive source 3 side and disengaged from the motor 2 side. Is transmitted to the inner rotor 11 without the engagement member 42 interposed therebetween. As shown in FIG. 2, in the second engagement state, the engagement member 42 engages both the motor 2 side and the internal combustion engine drive source 3 side, so that the drive force of the internal combustion engine drive source 3 is increased. It is transmitted to the inner rotor 11 via the engaging member 42 and the motor shaft 22.

  The engagement member 42 is engaged with the motor shaft 22 and the drive shaft 31 so as to be able to transmit a driving force, and the motor shaft 22 and the drive shaft according to the first engagement state and the second engagement state. It is comprised so that the engagement state with respect to 31 can be switched. Specifically, when the hydraulic pressure is controlled to be turned on by the OSV 41, as shown in FIG. 3, the engagement member 42 is moved in the A1 direction against the urging force of the spring member 43 by the hydraulic pressure to switch to the first engagement state. It is configured as follows. Further, when the hydraulic pressure is controlled to be off by the OSV 41, as shown in FIG. 2, the engaging member 42 is moved in the A2 direction by the urging force of the spring member 43 and switched to the second engaging state.

  In the case of the first engagement state (see FIG. 3) in which the drive source switching means 4 is switched so that the drive force of the motor 2 is transmitted to the inner rotor 11, the drive force of the motor 2 is the internal combustion engine. It is configured to be transmitted directly to the inner rotor 11 without going through the engine drive source 3. That is, in the first engagement state, only the driving force of the motor 2 is transmitted to the inner rotor 11. Further, in the case of the second engagement state (see FIG. 2) in which the driving force of the internal combustion engine drive source 3 is switched by the drive source switching means 4 to be transmitted to the inner rotor 11, the internal combustion engine drive source 3 The driving force is transmitted to the inner rotor 11 via the motor shaft 22. That is, in the second engagement state, if the driving force of the motor 2 is set to 0, only the driving force of the internal combustion engine drive source 3 is transmitted to the inner rotor 11, and if the driving force is generated in the motor 2, the motor 2 And the driving force of both the internal combustion engine drive source 3 is transmitted to the inner rotor 11.

  The motor control unit 5 switches the drive source of the oil pump 1 (inner rotor 11) to at least one of the motor 2 and the internal combustion engine drive source 3 based on the oil temperature, the rotational speed of the internal combustion engine (engine), and the hydraulic pressure. Is configured to do. Specifically, the motor control unit 5 is configured to perform control to turn on / off the OSV 41 of the drive source switching unit 4 and to switch the drive source of the oil pump 1. In addition, the motor control unit 5 is configured to drive or stop the motor 2 when the drive source of the oil pump 1 is switched. That is, when the drive source of the oil pump 1 is switched to the motor 2, the motor control unit 5 drives the motor 2 in accordance with the timing of switching the drive source, and the drive source of the oil pump 1 to the internal combustion engine drive source 3. The driving of the motor 2 is stopped in accordance with the switching timing.

  When the drive source switching means 4 switches the drive source of the inner rotor 11 from the internal combustion engine drive source 3 to the motor 2, the motor control unit 5 rotates the motor 2 and then applies the hydraulic pressure by the OSV 41. It is configured to perform control to turn on. Specifically, when the drive source of the inner rotor 11 is switched from the internal combustion engine drive source 3 to the motor 2 by the drive source switching means 4, the motor control unit 5 drives the motor 2 to rotate. After the rotational speed is set to a rotational speed in the vicinity of the rotational speed of the internal combustion engine drive source 3 (drive shaft 31), control is performed to turn on the hydraulic pressure by the OSV 41.

  Next, with reference to FIG. 5, the drive source switching process by the motor control unit 5 of the present embodiment will be described.

  In step S1, the oil temperature of the engine oil, the rotational speed of the internal combustion engine (engine), and the oil pressure of the engine oil are acquired. In step S2, it is determined whether the oil temperature is equal to or higher than a threshold value (for example, 80 ° C.). If the oil temperature is lower than the threshold value, the process proceeds to step S8. If the oil temperature is equal to or higher than the threshold value, it is determined in step S3 whether or not the rotational speed of the internal combustion engine is equal to or lower than the threshold value.

  If the rotational speed of the internal combustion engine is larger than the threshold value, the process proceeds to step S8. If the rotational speed is equal to or smaller than the threshold value (for example, 4000 rpm), it is determined in step S4 whether the oil pressure of the engine oil is equal to or smaller than the threshold value. . If the oil pressure of the engine oil is greater than the threshold value, the process proceeds to step S8. If the oil pressure is equal to or less than the threshold value, the motor 2 is driven in step S5. Specifically, the motor 2 is driven so that the number of rotations is close to the number of rotations of the internal combustion engine drive source 3.

  In step S6, the OSV 41 is controlled to be ON. That is, the hydraulic pressure from the oil pump 1 is controlled to be applied to the engaging member 42. In step S7, the shaft connection is released. That is, as shown in FIG. 3, the engagement member 42 is moved in the A1 direction, and the connection between the engagement member 42 and the motor shaft 22 is released. Thereby, the drive source of the oil pump 1 (inner rotor 11) is switched to the motor 2. That is, when the oil temperature of the engine oil is equal to or higher than the threshold value, the rotational speed of the internal combustion engine is equal to or lower than the threshold value, and the oil pressure of the engine oil is equal to or lower than the threshold value, the drive source of the oil pump 1 (inner rotor 11) is switched to the motor 2. Thereafter, the drive source switching process is terminated.

  When the engine oil temperature is lower than the threshold value, the engine speed is higher than the threshold value, or the engine oil pressure is higher than the threshold value, the drive source of the oil pump 1 (inner rotor 11) is driven by the internal combustion engine in step S8. Switch to source 3. Specifically, the OSV 41 is controlled to be OFF, and as shown in FIG. 2, the engaging member 42 is moved in the A2 direction, and the engaging member 42 and the motor shaft 22 are connected. Thereafter, the drive source switching process is terminated.

  In the present embodiment, as described above, the internal combustion engine drive source 3 that transmits the driving force of the internal combustion engine to the inner rotor 11 of the oil pump 1 including the inner rotor 11 and the outer rotor 12, and the inner of the oil pump 1. By providing the motor 2 that rotationally drives the rotor 11, the motor 2 rotationally drives the inner rotor 11 instead of the outer rotor 12, so that it is not necessary to dispose the motor 2 outside the outer rotor 12 in the radial direction. Thereby, it is possible to suppress the oil pump device 100 including the internal combustion engine drive source 3 and the motor 2 from increasing in the radial direction. Further, unlike the case where the oil pump 1 is rotationally driven only by the internal combustion engine drive source 3 by providing the drive source switching means 4 for switching to at least one of the motor 2 and the internal combustion engine drive source 3, the oil pump 1 is driven by the motor 2. By switching to drive, the oil pump device 100 can supply the oil having the optimum pressure for the internal combustion engine regardless of the rotational speed of the internal combustion engine. Further, by switching the drive source of the oil pump 1 to at least one of the motor 2 or the internal combustion engine drive source 3 by the hydraulic pressure on / off control by the OSV 41, the timing for switching the drive source can be arbitrarily set. Further, since the switching is performed using the OSV 41, the motor 2 can be driven in conjunction with the switching timing of the OSV 41.

  In the present embodiment, as described above, the engagement member 42 is switched to the first engagement state in which the driving force of the motor 2 is transmitted to the inner rotor 11 when the hydraulic pressure is controlled by the OSV 41, and the hydraulic pressure by the OSV 41 is changed. During the off control, the driving force of the internal combustion engine drive source 3 is switched to the second engagement state where the driving force is transmitted to the inner rotor 11. Thereby, the engagement state of the engagement member 42 can be switched, and the drive source of the oil pump 1 can be easily switched to either the internal combustion engine drive source 3 or the motor 2.

  In the present embodiment, as described above, in the first engagement state, the engagement member 42 is engaged with the internal combustion engine drive source 3 side and disengaged from the motor 2 side. The driving force of the motor 2 is transmitted to the inner rotor 11 without passing through the engaging member 42. In the second engaged state, the engaging member 42 is engaged with both the motor 2 side and the internal combustion engine drive source 3 side. By doing so, the driving force of the internal combustion engine drive source 3 is configured to be transmitted to the inner rotor 11 via the engagement member 42 and the motor shaft 22 (motor 2). Thus, in the first engagement state, the drive of the internal combustion engine drive source 3 is not transmitted to the inner rotor 11 and only the driving force of the motor 2 is transmitted to the inner rotor 11, so that regardless of the rotational speed of the internal combustion engine. The oil pump 1 can be driven by the motor 2. Further, in the second engagement state, the drive of the internal combustion engine drive source 3 is transmitted to the inner rotor 11 via the motor shaft 22, so that the drive force from the internal combustion engine is adjusted to the drive force by the motor 2, and the oil pump 1 can be driven. Thereby, the oil pump 1 can be driven efficiently.

  In the present embodiment, as described above, the engagement member 42 is engaged with the motor shaft 22 and the drive shaft 31 so as to be able to transmit a driving force, and the first engagement state and the second engagement state. Accordingly, the engagement state with respect to the motor shaft 22 and the drive shaft 31 is switched. Thus, the motor shaft 22 of the motor 2 and the drive shaft 31 of the internal combustion engine drive source 3 are arranged coaxially, and the motor 2 and the internal combustion engine drive source 3 are arranged side by side in the direction in which the shaft extends (A direction). Therefore, it is possible to easily prevent the oil pump device 100 including the internal combustion engine drive source 3 and the motor 2 from increasing in the radial direction.

  In the present embodiment, as described above, when the hydraulic pressure is controlled by the OSV 41, the engagement member 42 is moved in the A1 direction against the urging force of the spring member 43 by the hydraulic pressure to switch to the first engagement state. At the same time, when the hydraulic pressure is controlled to be off by the OSV 41, the engaging member 42 is moved in the A2 direction by the urging force of the spring member 43 to switch to the second engaging state. Thereby, it is possible to surely switch to the first engagement state by the hydraulic pressure when the hydraulic pressure is on, and to reliably switch to the second engagement state by the spring member 43 when the hydraulic pressure is off. Further, when the oil pressure is low, the spring member 43 causes the second engagement state. Therefore, even when the oil pressure at the start of the internal combustion engine is low and the oil viscosity is high, the oil pump 1 is driven by the internal combustion engine drive source 3. Can be driven. For example, when the hydraulic pressure at the start of the internal combustion engine is low, the oil pump 1 can be driven by the internal combustion engine drive source 3.

  In the present embodiment, as described above, the motor 2 is always connected to the inner rotor 11 so as to rotate together with the inner rotor 11, and the driving force of the internal combustion engine drive source 3 is changed by the drive source switching means 4 to the inner rotor. 11, the driving force of the internal combustion engine drive source 3 is transmitted to the inner rotor 11 via the motor shaft 22 (motor 2), and the motor 2 is driven by the drive source switching means 4. Is switched to be transmitted to the inner rotor 11, the driving force of the motor 2 is directly transmitted to the inner rotor 11 without going through the internal combustion engine drive source 3. Thus, when the driving force of the motor 2 is switched to be transmitted to the inner rotor 11, the driving force of the internal combustion engine drive source 3 is not transmitted to the inner rotor 11, and only the driving force of the motor 2 is transmitted to the inner rotor 11. Therefore, the oil pump 1 can be driven by the motor 2 regardless of the rotational speed of the internal combustion engine. Further, when the driving force of the internal combustion engine drive source 3 is switched to be transmitted to the inner rotor 11, the drive of the internal combustion engine drive source 3 is transmitted to the inner rotor 11 via the motor shaft 22. The oil pump 1 can be driven by adjusting the driving force of the motor 2 to the driving force from the engine. Thereby, the oil pump 1 can be driven efficiently.

  In the present embodiment, as described above, when the drive source of the inner rotor 11 is switched from the internal combustion engine drive source 3 to the motor 2 by the drive source switching means 4, after the motor 2 is driven to rotate, Control is performed to turn on the hydraulic pressure by the OSV 41. Thus, when the drive source is switched, the motor 2 is rotationally driven so as to follow the rotational speed of the drive shaft 31 on the internal combustion engine drive source 3 side, whereby the drive shaft 31 and the motor 2 on the internal combustion engine drive source 3 side are driven. Since the load applied to the motor shaft 22 can be reduced, the drive source of the inner rotor 11 can be smoothly switched from the internal combustion engine drive source 3 to the motor 2.

  Further, in the present embodiment, as described above, when the drive source of the inner rotor 11 is switched from the internal combustion engine drive source 3 to the motor 2 by the drive source switching means 4, the motor 2 is rotationally driven to drive the motor 2. Is set to a rotational speed in the vicinity of the rotational speed of the internal combustion engine drive source 3, and control is performed to turn on the hydraulic pressure by the OSV 41. Thereby, when the drive source is switched, the rotational speed of the motor shaft 22 of the motor 2 can be adjusted to a rotational speed in the vicinity of the rotational speed of the drive shaft 31 on the internal combustion engine drive source 3 side. Since the load applied between the drive shaft 31 and the motor shaft 22 of the motor 2 can be made substantially zero, the drive source of the inner rotor 11 can be smoothly switched from the internal combustion engine drive source 3 to the motor 2.

  The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is shown not by the above description of the embodiments but by the scope of claims for patent, and further includes all modifications within the meaning and scope equivalent to the scope of claims for patent.

  For example, in the above-described embodiment, an example in which the oil pump device of the present invention circulates engine oil has been shown, but the present invention is not limited to this. In the present invention, for example, the oil pump device may be configured to circulate oil (fluid) such as AT (automatic transmission) fluid, CVT (continuously variable transmission) fluid, or power steering fluid.

  Moreover, in the said embodiment, although the engaging member showed the example of the structure formed so that it may have a regular hexagonal cross section as shown in FIG. 4, this invention is not limited to this. In the present invention, for example, as shown in FIG. 6, the engaging member 42a may be formed to have an oval cross section. The engaging member may be formed to have a regular polygonal cross section other than a hexagon.

  In the above-described embodiment, when the hydraulic pressure is controlled by the control valve, the motor is switched to the first engagement state in which the driving force of the motor is transmitted to the inner rotor, and when the hydraulic pressure is controlled by the control valve, the internal combustion engine drive source is driven. Although the example configured to switch to the second engagement state in which the force is transmitted to the inner rotor is shown, the present invention is not limited to this. In the present invention, when the hydraulic pressure is controlled by the control valve, the driving force of the internal combustion engine drive source is switched to the first engagement state in which the driving force is transmitted to the inner rotor. You may comprise so that it may switch to the 2nd engagement state transmitted to a rotor.

  In the above embodiment, for convenience of explanation, the processing of the control unit of the present invention has been described using a flow-driven flowchart that performs processing in order along the processing flow, but the present invention is not limited to this. In the present invention, the processing operation of the control unit may be performed by event-driven (event-driven) processing that executes processing in units of events. In this case, it may be performed by a complete event drive type or a combination of event drive and flow drive.

DESCRIPTION OF SYMBOLS 1 Oil pump 2 Motor 2a Motor main-body part 3 Internal combustion engine drive source 4 Drive source switching means 11 Inner rotor 12 Outer rotor 22 Motor shaft 31 Drive shaft 32 Drive transmission mechanism part 41 OSV (control valve)
42 engaging member 43 spring member (urging member)
100 Oil pump device

Claims (9)

An internal combustion engine drive source for transmitting a drive force of the internal combustion engine to the inner rotor of an oil pump including an inner rotor and an outer rotor;
A motor that rotationally drives the inner rotor of the oil pump;
Drive source switching means for switching the drive source of the inner rotor of the oil pump to at least one of the motor and the internal combustion engine drive source;
The drive source switching means includes a control valve for turning on and off the hydraulic pressure from the oil pump, and drives the inner rotor by switching to at least one of the motor and the internal combustion engine drive source by hydraulic on / off control by the control valve. An oil pump device that is configured to The drive source switching means includes an engagement member engageable with the internal combustion engine drive source side and the motor side,
The engagement member is switched to a first engagement state in which the driving force of either the motor or the internal combustion engine drive source is transmitted to the inner rotor when the hydraulic pressure is controlled by the control valve. 2. The oil according to claim 1, wherein the oil is configured to be switched to a second engagement state in which the driving force of either the motor or the internal combustion engine drive source is transmitted to the inner rotor when the hydraulic pressure is controlled to be off by the oil pressure. Pump device. In the first engagement state, the engagement member is engaged with the internal combustion engine drive source side and disengaged from the motor side, whereby the driving force of the motor is applied to the engagement member. Is transmitted to the inner rotor without going through,
In the second engagement state, the engagement member engages both the motor side and the internal combustion engine drive source side, so that the driving force of the internal combustion engine drive source causes the engagement member and the motor to move. The oil pump device according to claim 2, wherein the oil pump device is configured to be transmitted to the inner rotor via the inner rotor. The motor includes a motor shaft extending to the oil pump side,
The internal combustion engine drive source includes a drive shaft that extends toward the oil pump and is disposed so as to be coaxially opposed to the motor shaft, and that transmits a drive force.
The engagement member engages the motor shaft and the drive shaft so as to be able to transmit a driving force, and the motor shaft and the drive according to the first engagement state and the second engagement state. The oil pump device according to claim 2 or 3, wherein the engagement state with the shaft is switched. The drive source switching means further includes a biasing member that biases the engagement member in a second direction opposite to a first direction in which the hydraulic pressure is applied to the engagement member when the hydraulic pressure is controlled by the control valve.
At the time of on-control of the hydraulic pressure by the control valve, the engagement member is moved in the first direction against the urging force by the urging member by the hydraulic pressure to switch to the first engagement state, and by the control valve 5. The structure according to claim 2, wherein when the hydraulic pressure is turned off, the engagement member is moved in the second direction by the urging force of the urging member to switch to the second engagement state. The oil pump device according to Item 1. The motor and the internal combustion engine drive source each include a motor main body and a drive transmission mechanism,
The motor body is disposed on one side in the axial direction of the oil pump with respect to the oil pump including the inner rotor and the outer rotor,
The oil pump device according to any one of claims 1 to 5, wherein the drive transmission mechanism is disposed on the other side in the axial direction of the oil pump with respect to the oil pump. The motor is always connected to the inner rotor so as to rotate with the inner rotor,
When the drive source switching means is switched so that the drive force of the internal combustion engine drive source is transmitted to the inner rotor, the drive force of the internal combustion engine drive source is transmitted to the inner rotor via the motor. Communicated to
When the drive power switching means is switched so that the drive force of the motor is transmitted to the inner rotor, the drive force of the motor is directly applied to the inner rotor without going through the internal combustion engine drive source. The oil pump device according to any one of claims 1 to 6, wherein the oil pump device is configured to be transmitted.   When the drive source of the inner rotor is switched from the internal combustion engine drive source to the motor by the drive source switching means, the motor is driven to rotate, and then the hydraulic pressure is turned on and off by the control valve. The oil pump device according to any one of claims 1 to 7, which is configured.   When the drive source switching means switches the drive source of the inner rotor from the internal combustion engine drive source to the motor, the motor is driven to rotate, and the rotational speed of the motor is set to the rotational speed of the internal combustion engine drive source. The oil pump device according to claim 8, wherein the oil pump device is configured to perform on / off control of hydraulic pressure by the control valve after the rotation speed is in the vicinity.

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