JP3847720B2 - Auxiliary drive device for internal combustion engine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To drive an accessory unsynchronously with an engine. <P>SOLUTION: This device comprises a motor/generator 2 attached to a crankshaft 22 of an engine 1, and an accessory driving motor 9 arranged concentrically outside the motor/generator 2. A rotor 46 of the accessory driving motor 9 is rotatably supported to the crankshaft 22 via a bearing 25, and a pulley part 46a is installed on an outer periphery of the rotor 46. A V-belt 13 is wound around the pulley part 46a and a pulley 12 of an accessory 11. <P>COPYRIGHT: (C)2004,JPO&amp;NCIPI

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an accessory drive device for an internal combustion engine in a hybrid vehicle.
[0002]
[Prior art]
In recent years, an engine and a motor / generator (motor generator) are connected to a power transmission mechanism connected to a drive wheel of a vehicle for the purpose of saving fuel for driving the engine and reducing exhaust gas generated by fuel combustion. When driving, if necessary, the motor / generator assists the drive and transmits the power input from the drive wheels to the motor / generator when decelerating. The motor / generator performs a regenerative operation to reduce the deceleration energy. Hybrid vehicles have been developed that convert to regenerative energy and charge power storage devices as electrical energy.
As a motor / generator in this type of hybrid vehicle, a motor / generator sandwiched between an engine and a power transmission mechanism and a motor / generator combined with a planetary gear are often used.
[0003]
Also, in this type of hybrid vehicle, a technology has been developed that enables driving of auxiliary equipment such as an air conditioner and power steering even when the engine is stopped (so-called idle stop) when the vehicle is stopped (for example, Patent Document 1, (See Patent Document 2 and Patent Document 3).
In the hybrid vehicle disclosed in Patent Document 1, an electromagnetic clutch is built in a pulley attached to an engine crankshaft, and a V-belt is hung on the pulley, a motor / generator pulley, and an auxiliary pulley. The crankshaft and the pulley can be rotated relative to each other by disengaging the electromagnetic clutch so that the auxiliary machine can be driven by the motor / generator even when the engine is stopped. In this hybrid vehicle, the engine is started by the motor / generator.
[0004]
The hybrid vehicle disclosed in Patent Document 2 includes a flat accessory driving motor connected to an engine crankshaft via an electromagnetic clutch, separately from the motor / generator, and is attached to the accessory driving motor. A V-belt is wound around the pulley and the pulley of the auxiliary machine, and when the engine is stopped, the electromagnetic clutch is disengaged so that the auxiliary machine can be driven by the auxiliary machine driving motor.
[0005]
Patent Document 3 discloses a variable displacement compressor for an air conditioner of a hybrid vehicle. A rotation main shaft of the compressor is connected to an engine via an electromagnetic clutch and is connected to a motor unit via a reduction gear. When the engine is stopped, the electromagnetic clutch is disengaged and the compressor can be driven by the motor unit.
[0006]
[Patent Document 1]
JP-A-8-14145
[Patent Document 2]
JP 2001-298804 A
[Patent Document 3]
JP 11-287182 A
[0007]
[Problems to be solved by the invention]
However, the above-described conventional hybrid vehicle has the following problems.
In the case of Patent Document 1, since the V-belt hung on the auxiliary machine also serves as the engine starter belt by the motor / generator, the transmission capacity of the belt becomes very large, and therefore the number of V-belts is increased. It is necessary (for example, about 10 ridges), and the shaft length necessary for attaching the pulley becomes long, so that the mountability is deteriorated.
Also, as in Patent Document 2, when an accessory drive motor is arranged coaxially with the engine and a pulley is attached to the main shaft of the accessory drive motor, the shaft length becomes long and the mountability is poor.
Furthermore, when the auxiliary machine driving V-belt also serves as the engine starting belt, when the engine is driven by the motor when the engine is stopped, it is necessary to temporarily reduce the rotation of the motor to zero before starting the engine. As a result, the accessory drive becomes discontinuous and the merchantability is reduced.
[0008]
Further, recent internal combustion engines tend to be used by increasing the maximum rotational speed in order to improve the output per displacement, but in any case of Patent Documents 1 to 3, the electromagnetic clutch is connected to the engine. When the auxiliary machine is driven, the auxiliary machine is driven in proportion to the engine speed, so that the maximum engine speed is limited due to the operating rotational speed range of the auxiliary machine. For example, in an engine with a maximum rotational speed of 7000 rpm, the generator is driven with a pulley ratio of about 2.5, so the maximum rotational speed of the generator is 17500 rpm, which is the rotational limit of the AC generator for engines. Therefore, it is difficult to increase the maximum engine speed with the pulley ratio fixed at about 2.5. On the other hand, if the pulley ratio can be lowered and used near 1 to 1, for example, if the pulley ratio is 0.9, the maximum engine speed can be set to 20000 rpm. However, with such a pulley ratio, the engine idling speed is around 700 rpm, so the idling speed of the alternator is lower than that of the alternator during idling, and sufficient power supply in the idling and cruising conditions is impossible. It becomes. For this reason, it is necessary to increase the idling speed to about 1750 rpm, which is about 2.5 times larger. For these reasons, the maximum engine speed is currently limited to about 7000 rpm.
[0009]
Further, when the auxiliary machine is driven by the engine with the electromagnetic clutch connected, the auxiliary machine is driven in proportion to the engine speed, so that the auxiliary machine may not always be used at the optimum speed.
For example, in the case of a compressor for an air conditioner, the driving demand on the passenger compartment side is mainly determined by the outside air temperature, whereas the actual driving of the compressor depends on the engine speed and the engine speed proportional to the running speed. It will be decided. Therefore, in order to control the temperature appropriately, it is necessary to take measures such as using a heater together or adopting a variable displacement compressor as disclosed in Patent Document 3, but the heater combined use is usually unnecessary. The use of capacity is not preferable from the viewpoint of fuel consumption, and the variable displacement compressor is complicated in structure and expensive, which is disadvantageous in cost.
[0010]
In any case of Patent Documents 1 to 3, the power transmission between the engine and the auxiliary machine is connected / disconnected by the electromagnetic clutch. However, since the electromagnetic clutch is frequently operated, the power consumption increases and the fuel is increased. Not only does consumption worsen, it also causes rotational fluctuations in the engine, and causes noise and vibration, which is not preferable. In particular, when a constant capacity compressor is used and a heater is used together as described above, it is necessary to frequently connect and disconnect the electromagnetic clutch in order to reduce the heater usage area and reduce fuel consumption. large.
[0011]
In addition, when the electromagnetic clutch is disengaged, it is impossible for the engine to generate power with the motor / generator, so the battery (high pressure and low pressure) is likely to rise, and depending on the state of charge of the battery, it may be impossible to drive the auxiliary equipment. It becomes difficult to control the auxiliary equipment.
Accordingly, the present invention provides a compact auxiliary device driving apparatus for an internal combustion engine that can drive an auxiliary device asynchronously with the engine, enables high-efficiency operation of the auxiliary device, and is compact.
[0012]
[Means for Solving the Problems]
  In order to solve the above problems, the invention according to claim 1 is attached to a crankshaft (for example, a crankshaft 22 in an embodiment described later) of an internal combustion engine (for example, an engine 1 in an embodiment described later). A motor / generator (for example, a motor / generator 2 in an embodiment described later) and an accessory driving motor (for example, an accessory driving in an embodiment described later) disposed concentrically outside the motor / generator. A motor 9),A rotor (for example, a rotor 46 in an embodiment described later) of the accessory drive motor is rotatably supported on the crankshaft via a bearing (for example, a bearing 25 in an embodiment described later) and the internal combustion engine. Can rotate asynchronously,The auxiliary drive motor lowToAn auxiliary machine driving apparatus for an internal combustion engine is provided with a pulley (for example, a pulley portion a in an embodiment described later).
  With this configuration, the auxiliary machine can be driven by the auxiliary drive motor even when the internal combustion engine is stopped, and the auxiliary machine can be driven by the auxiliary drive motor asynchronously with the internal combustion engine even during the operation of the internal combustion engine. Can be driven.
[0014]
  Claim2The invention according to claim1In the described invention, a stator of the motor / generator (for example, a stator 33 in an embodiment described later) and a stator of the accessory driving motor (for example, a stator 41 in an embodiment described later) are continuous in the radial direction. It is characterized by being integrally formed.
  With this configuration, the stator of the motor / generator and the stator of the accessory driving motor can be reduced in size and weight.
[0015]
  Claim3The invention according to claim 1Or claim 2In the described invention, motor generators (for example, motor generators 2 and 14 in the embodiments described later) are provided at both ends of the crankshaft of the internal combustion engine, and either one of these motor generators (for example, described later). In this embodiment, the accessory drive motor is provided outside the motor / generator 2).
  With this configuration, since the motor / generator is divided into two parts, the in-vehicle freedom is expanded.
[0016]
  Claim4The invention according to claim3The number of pole pairs of one of the two motor generators (for example, the motor generator 14 in the embodiment described later) is the other motor generator (for example, the embodiment described later). The number of pole pairs of the motor / generator 2) in the embodiment is an integral multiple of the number of pole pairs, and both the motor / generators are DC brushless motors driven through a common inverter.
  With this configuration, the two motor / generators have common electrical characteristics, and it is possible to share a three-phase line and an inverter.
[0017]
  Claim5The invention according to claim 1 to claim 14In the invention according to any one of the above, the rotational speed ratio of the accessory driving motor and the accessory driven by the accessory driving motor is such that the driving efficiency of the accessory driving motor is not less than a predetermined value, and The driving efficiency of the auxiliary machine is set to be equal to or higher than a predetermined value.
  By comprising in this way, it becomes possible to drive | operate an auxiliary machine drive motor and an auxiliary machine efficiently.
[0018]
DETAILED DESCRIPTION OF THE INVENTION
DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of an auxiliary machine driving device for an internal combustion engine according to the present invention will be described below with reference to the drawings of FIGS.
[First Embodiment]
First, a first embodiment of an auxiliary machine drive device for an internal combustion engine (hereinafter abbreviated as an auxiliary machine drive device) according to the present invention will be described with reference to the drawings of FIGS.
FIG. 1 is a schematic configuration diagram of a parallel hybrid vehicle V provided with an auxiliary machine drive device 10. In this hybrid vehicle V, an engine (internal combustion engine) 1 as a power source, a motor / generator 2, and an automatic transmission 3 are directly connected in series. The motor / generator 2 is an electric motor capable of generating power, and the driving forces of both the engine 1 and the motor / generator 2 are transmitted to the driving wheels 4 via the automatic transmission 3. Further, when the driving force is transmitted from the driving wheel 4 side to the motor / generator 2 side during deceleration of the hybrid vehicle V, the motor / generator 2 functions as a generator to generate a so-called regenerative braking force, and the kinetic energy of the vehicle body. Is recovered as electrical energy.
[0019]
The motor generator 2 is driven and regenerated by a power drive unit (PDU) 6 in response to a control command from the ECU 5. The power drive unit 6 includes an inverter, and the power drive unit 6 is connected to a motor / generator 2 and a high-voltage battery 7 that exchanges electric energy.
The battery 7 is connected to an inverter 8, and the inverter 8 is controlled by the ECU 5 to convert DC power of the battery 7 into AC power and to supply power to the accessory driving motor 9.
[0020]
The accessory driving motor 9 includes a pulley portion 46 a, and the V belt 13 is wound around the pulley portion 46 a and the pulley 12 of the accessory 11 so that the accessory 11 is driven by the accessory driving motor 9. It is configured. Here, as the auxiliary machine 11, for example, a power steering drive device, an air conditioner compressor, a water pump, and the like can be exemplified, and FIGS. 1 and 2 represent one of them as a representative. Therefore, actually, one pulley 12 is provided for each auxiliary machine, and a V-belt 13 is wound around each pulley 12.
Here, the motor / generator 2 and the accessory driving motor 9 constitute the main components of the accessory driving device 10.
[0021]
Next, with reference to FIG. 2 and FIG. 3, the structure of the motor generator 2 and the accessory drive motor 9 which are the main structures of the accessory drive apparatus 10 is demonstrated. FIG. 2 is a conceptual diagram of the motor / generator 2 and the accessory driving motor 9, and FIG. 3 is a detailed sectional view thereof.
One end portion 22a of the crankshaft 22 protrudes from the crankcase 21 of the engine 1, and the rotor 31 of the motor / generator 2 is fixed to the one end portion 22a. The rotor 31 includes a large number of permanent magnet pieces 32 fixed to the outer periphery thereof, and the rotor 31 rotates in synchronization with the crankshaft 22.
A stator 33 of the motor / generator 2 is attached to the outside of the rotor 31 with a predetermined gap in the radial direction. The stator 33 is fixed to the inner peripheral surface of a cylindrical stator holding ring 34 fixed to the crankcase 21. The stator 33 is connected to the annular shape from the back yoke portion 35a and the back yoke portion 35a. It consists of an iron core 35 formed by laminating a number of electromagnetic steel plates having teeth 35b extending inward in the direction, and a stator winding 37 wound around each tooth 35b via a bobbin 36.
The rotor 31 and the stator 33 constitute a motor generator 2 composed of a DC brushless motor.
[0022]
Further, a stator 41 of the accessory driving motor 9 is disposed outside the stator 33 of the motor / generator 2. The stator 41 is fixed to the outer peripheral surface of a cylindrical stator holding ring 42 that is put on the stator holding ring 34 of the motor / generator 2 and is fixed to the crankcase 21 together with the stator holding ring 34 by the bolt 23. The stator 41 includes an iron core 43 formed by laminating a number of electromagnetic steel plates including a back yoke portion 41a and a teeth portion 41b extending radially outward from the back yoke portion 41a, and each tooth portion 41b. The stator winding 45 is wound around the bobbin 44.
[0023]
Further, the rotor 46 of the accessory drive motor 9 is disposed outside the stator 41. The rotor 46 is rotatably supported on the crankshaft 22 via a bearing 25, a pulley portion 46 a that surrounds the radially outer side of the stator 41, and a hub that is rotatably attached to the crankshaft 22 via the bearing 25. A portion 46b, a disc portion 46c that is disposed on the axially outer side of the crankshaft 22 with respect to the stator 41 and the motor / generator 2 of the accessory drive motor 9, and connects the pulley portion 46a and the hub portion 46b; The permanent magnet piece 48 includes a large number of permanent magnet pieces 48 fixed to the inner peripheral surface of the portion 46 a, and a predetermined gap is provided between the permanent magnet piece 48 and the stator 41 in the radial direction.
The stator 41 and the rotor 46 constitute an accessory drive motor 9 composed of a DC brushless motor.
[0024]
In other words, the accessory driving motor 9 is concentrically disposed radially outside the motor / generator 2, and the rotor 46 of the accessory driving motor 9 is rotatably supported by the crankshaft 22. Therefore, the rotor 46 of the accessory drive motor 9 can rotate asynchronously with the crankshaft 22 of the engine 1, and the rotor 46 of the accessory drive motor 9 can rotate even when the engine 1 is stopped.
The accessory driving V-belt 13 is wound around the pulley 46 a of the rotor 46 of the accessory driving motor 9. That is, it can be said that the rotor 46 of the accessory drive motor 9 also serves as a pulley, and the pulley is provided in the rotor 46.
[0025]
In the accessory drive device 10 configured as described above, the accessory drive motor 9 is rotated asynchronously with the engine 1 only by the rotor 46 being rotatably supported by the crankshaft 22. In addition, since there is no electromagnetic clutch between the accessory drive motor 9 and the engine 1, there is no vibration, noise, and power consumption due to engagement / disengagement of the electromagnetic clutch.
Further, the auxiliary machine 11 can be driven by the auxiliary machine driving motor 9 while the engine 1 is stopped, and the auxiliary machine 11 is driven by the auxiliary machine driving motor 9 asynchronously with the engine 1 during the operation of the engine 1. Since it can drive, the rotation speed of the auxiliary machine 11 can be determined based on the vehicle body requirement, and can be determined regardless of the rotation speed of the engine 1. As a result, it is possible to achieve both a reduction in the size and speed of the auxiliary machine 11 and a higher speed of the engine 1.
[0026]
Furthermore, since the engine 1 is started by the motor / generator 2 and the accessory driving motor 9 is not involved in starting the engine 1, it is not necessary to stop the accessory 11 when the engine 1 is started. Since the auxiliary machine 11 can be continuously operated, the merchantability is improved.
Further, since the accessory driving motor 9 is not involved in starting the engine 1, the transmission capacity applied to the accessory driving V belt 13 can be reduced, the number of peaks of the V belt 13 can be reduced, and the rotor 46 The axial length of the crankshaft 22 required for the attachment is short.
In addition, since the part where the motor / generator 2 and the accessory driving motor 9 are concentrically arranged is conventionally a part where a pulley for driving the accessory by the engine 1 is attached, In comparison with this, the axial length of the crankshaft 22 is not increased.
[0027]
Moreover, although the pulley part 46a of the auxiliary machine drive motor 9 and the pulleys 12 of the plurality of auxiliary machines 11 can be set freely in the pulley ratio, the drive efficiency of the auxiliary machine drive motor 9 is higher than a predetermined efficiency. In addition, the rotation speeds of the auxiliary motor 9 and the auxiliary machine 11 are set so that the driving efficiency of each auxiliary machine 11 is higher than a predetermined efficiency, and the pulley ratio is set so as to be the rotation speed ratio. If the pulley ratio is set in this way, it becomes possible to efficiently operate the auxiliary machine driving motor 9 and each auxiliary machine 11 and to fully exhibit the performance of each auxiliary machine 11. In addition, power consumption can be suppressed.
[0028]
[Second Embodiment]
Next, a second embodiment of the accessory driving apparatus 10 according to the present invention will be described with reference to the drawing of FIG.
The auxiliary drive device 10 of the second embodiment is different from that of the first embodiment in that the stator holding ring 34 of the motor / generator 2 and the auxiliary drive motor 9 in the first embodiment. The stator holding ring 42 is integrated.
That is, in the second embodiment, only one stator holding ring 51 is fixed to the crankcase 21, and the stator 33 of the motor / generator 2 is fixed inside the stator holding ring 51, and the outside is supplemented. The stator 41 of the machine drive motor 9 is fixed.
Since other configurations are the same as those of the first embodiment, the same reference numerals are given to the same mode portions and the description thereof is omitted.
In the accessory drive device 10 of the second embodiment, in addition to the operation of the first embodiment described above, the number of parts can be reduced and the weight can be reduced.
[0029]
[Third Embodiment]
Next, a third embodiment of the accessory drive apparatus 10 according to the present invention will be described with reference to the drawings of FIGS. The auxiliary machine drive device 10 of the third embodiment is different from that of the first embodiment as follows.
In the third embodiment, the iron core 35 of the stator 33 of the motor / generator 2 and the iron core 43 of the stator 41 of the accessory driving device 10 are integrated to share the back yoke portion, and the integrated iron core is used as the stator. It is directly fixed to the crankcase 21 and the oil pan without using the retaining ring.
[0030]
FIG. 6 is a front view of the motor / generator 2 and the accessory driving motor 9 as seen from the axial direction thereof. The iron core 52 is formed by laminating a number of electromagnetic steel plates having a substantially cross shape when viewed from the front, a common back yoke portion 52a is formed at the center portion, and a teeth portion 52b of the motor / generator 2 is radially inward from the back yoke portion 52a. The teeth 52c of the accessory drive motor 9 extend from the back yoke 52a to the outside in the radial direction. Then, as shown in FIG. 5, the stator winding 37 is wound around the tooth portion 52b of the iron core 52 via the bobbin 36 to form the stator 33 of the motor / generator 2, and the teeth portion 52c via the bobbin 44. Thus, the stator winding 45 is wound to constitute the stator 41 of the accessory drive motor 9.
That is, the stator 33 of the motor / generator 2 and the stator 41 of the accessory driving motor 9 are integrally formed continuously in the radial direction.
[0031]
A large number of iron cores 52 configured in this way are arranged on the circumference, and bolts 53 are inserted into attachment holes 52d provided in the back yoke portions 52a of the respective iron cores 52. The bolts 53 are attached to the mounting seats of the crankcase 21. By screwing and fixing to 24, the back yoke portion 52a is connected in an annular shape.
Since other configurations are the same as those of the first embodiment, the same reference numerals are given to the same mode portions and the description thereof is omitted.
In the accessory drive device 10 of the third embodiment, in addition to the operation of the first embodiment described above, the stator 33 of the motor / generator 2 and the stator 41 of the accessory drive motor 9 are reduced in size and weight. This makes it possible to improve in-vehicle performance.
[0032]
[Fourth Embodiment]
Next, a fourth embodiment of the auxiliary machine driving device 10 according to the present invention will be described with reference to the drawing of FIG. The difference between the auxiliary machine drive device 10 of the fourth embodiment and that of the first embodiment is as follows.
The only difference between the accessory driving apparatus 10 of the fourth embodiment and that of the first embodiment is that it includes two motor generators.
More specifically, the accessory driving apparatus 10 of the fourth embodiment includes the motor / generator 2 and the accessory driving motor 9 at one end of the crankshaft 22 as in the first embodiment. Another motor / generator 14 having the same configuration as the motor / generator 2 is provided at the other end of the motor 22. The motor / generator 14 is sandwiched between the engine 1 and the automatic transmission 3, and a rotor (not shown) of the motor / generator 14 is fixed to the other end portion of the crankshaft 22. Are connected to an input shaft (not shown).
[0033]
The motor / generator 14 is a DC brushless motor like the motor / generator 2, and the number of pole pairs (the number of magnets, the number of teeth, etc.) of the motor / generator 14 is set to an integer multiple of the number of pole pairs of the motor / generator 2. Has been. As a result, the two motor generators 2 and 14 have common electrical characteristics and can share a three-phase line and an inverter. In fact, in the fourth embodiment, the motor generators 2 and 14 are configured to be driven via a common inverter.
[0034]
In the fourth embodiment, the three driving forces of the engine 1 and the motor / generators 2 and 14 are transmitted to the driving wheel 4 via the automatic transmission 3, and when the hybrid vehicle V decelerates, the driving wheel 4 side When the driving force is transmitted from the motor to the motor generators 2 and 14, both the motor generators 2 and 14 function as generators to generate a so-called regenerative braking force, and the kinetic energy of the vehicle body is used as electric energy to the battery. to recover.
Since other configurations are the same as those of the first embodiment, the same reference numerals are given to the same mode portions and the description thereof is omitted.
[0035]
In the auxiliary machine drive device 10 of the fourth embodiment, in addition to the operations of the first embodiment described above, there are the following operations.
Since the motor generators 2 and 14 are divided, the output can be increased as compared with the case where only one of the motor generators is provided. In other words, even when only one of the motor generators 2 and 14 is insufficient, if the two motor generators 2 and 14 are combined, the output required for the vehicle V can be sufficiently secured. . In addition, by dividing the motor / generator into two parts, the in-vehicle freedom is expanded.
Since the two motor generators 2 and 14 share a three-phase line and an inverter, the mounting space can be reduced as compared with the case where each of the motor generators 2 and 14 includes a three-phase line and an inverter. In addition, the weight can be reduced. That is, the size and weight can be reduced, and the in-vehicle performance is also improved.
[0036]
In addition to the fourth embodiment, when the two motor generators 2 and 14 are driven via individual inverters, the power generation / electric operation of either one of the motor generators 2 or 14 is It is preferable to control torsional vibration of one crankshaft 22 because vibration of the entire power plant can be suppressed, and the merchantability is improved. Generally, the torsional vibration of the crankshaft 22 is less on the automatic transmission 3 side and more on the motor / generator 9 side (pulley section 46a side). It is preferable to perform vibration suppression control so as to reduce vibrations by generating vibrations.
[0037]
[Other Embodiments]
The present invention is not limited to the embodiment described above.
For example, in the embodiment described above, the auxiliary machine 11 is driven by a belt, but it may be driven by a chain.
[0038]
【The invention's effect】
  As described above, according to the first aspect of the invention, the auxiliary machine can be driven by the auxiliary machine drive motor even when the internal combustion engine is stopped, and the auxiliary machine is asynchronously supplemented with the internal combustion engine even during the operation of the internal combustion engine. Since the auxiliary machine can be driven by the machine drive motor, the rotation speed of the auxiliary machine can be determined based on the vehicle body requirement, and can be determined regardless of the engine rotation speed. As a result, it has the excellent effect that it is possible to achieve both compactness and low rotation of the auxiliary machine and high engine rotation.Played.
[0039]
  Claim2According to the invention according to the present invention, the stator of the motor / generator and the stator of the accessory driving motor can be reduced in size and weight.
  Claim3According to the invention according to the present invention, since the motor / generator is divided into two parts, there is an effect that the degree of freedom in the vehicle is increased.
[0040]
  Claim4According to the invention according to the present invention, the two motors / generators have a common electrical characteristic, and the three-phase wire and the inverter can be shared. Also has the effect of improving.
  Claim5According to the invention according to the present invention, it is possible to efficiently operate the accessory driving motor and the accessory, so that the performance of the accessory can be sufficiently exhibited and the power consumption can be suppressed. There is an effect.
[Brief description of the drawings]
FIG. 1 is a schematic configuration diagram in a first embodiment of a hybrid vehicle provided with an accessory driving device according to the present invention;
FIG. 2 is a conceptual diagram of an accessory driving device in the first embodiment.
FIG. 3 is a cross-sectional view showing in detail the accessory driving device in the first embodiment.
FIG. 4 is a cross-sectional view showing in detail an accessory driving device according to a second embodiment.
FIG. 5 is a cross-sectional view showing in detail an accessory driving device according to a third embodiment.
FIG. 6 is a front view of the accessory drive device according to the third embodiment as viewed from the axial direction.
FIG. 7 is a conceptual diagram of an auxiliary machine driving device according to a fourth embodiment.
[Explanation of symbols]
1 engine (internal combustion engine)
2 Motor generator
9 Auxiliary drive motor
10 Auxiliary drive
11 Auxiliary machine
14 Motor generator
22 Crankshaft
33 Stator (Motor / Generator Stator)
41 Stator (Stator for motor driving auxiliary equipment)
46 Rotor
46a Pulley (pulley)

Claims (5)

A motor / generator mounted on a crankshaft of an internal combustion engine; and an accessory driving motor arranged concentrically outside the motor / generator, wherein the rotor of the accessory driving motor has the bearing via a bearing. An auxiliary machine driving apparatus for an internal combustion engine, wherein the auxiliary machine driving apparatus for an internal combustion engine is rotatably supported by a crankshaft and can be rotated asynchronously with the internal combustion engine, and a pulley is provided on a rotor of the auxiliary machine driving motor. 2. The auxiliary driving apparatus for an internal combustion engine according to claim 1, wherein the stator of the motor / generator and the stator of the auxiliary driving motor are integrally formed continuously in a radial direction . 3. The motor according to claim 1 , further comprising: a motor / generator at each end of a crankshaft of the internal combustion engine, and the motor for driving the auxiliary device outside one of the motor / generator. Auxiliary machine drive device for internal combustion engine. The number of pole pairs of one of the two motor generators is an integral multiple of the number of pole pairs of the other motor generator, and both motor generators are DC brushless driven through a common inverter. The auxiliary machine drive device for an internal combustion engine according to claim 3 , wherein the drive device is an electric motor . The rotational speed ratio between the auxiliary machine driving motor and the auxiliary machine driven by the auxiliary machine driving motor is such that the driving efficiency of the auxiliary machine driving motor is not less than a predetermined value, and the driving efficiency of the auxiliary machine is not less than a predetermined value. The auxiliary machine driving apparatus for an internal combustion engine according to any one of claims 1 to 4, wherein the auxiliary machine driving apparatus for the internal combustion engine is set to be .

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