JP2004232560A - Auxiliary drive 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&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an accessory drive device for an internal combustion engine in a hybrid vehicle.
[0002]
[Prior art]
2. Description of the Related Art In recent years, an engine and a motor / generator (motor generator) have been used in a power transmission mechanism connected to driving wheels of a vehicle for the purpose of saving fuel for driving the engine and reducing exhaust gas generated by combustion of the fuel. Connected, drive assist is provided by a motor generator as needed during traveling, and power input from drive wheels is transmitted to the motor generator during deceleration, and a regenerative operation is performed by the motor generator to reduce deceleration energy. Hybrid vehicles have been developed that convert the energy into regenerative energy and charge the power storage device as electric 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 devices 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, Patent Documents 2 and 3).
In the hybrid vehicle disclosed in Patent Literature 1, an electromagnetic clutch is incorporated in a pulley attached to a crankshaft of an engine, and a V-belt is hung on the pulley, a pulley of a motor generator, and a pulley of an auxiliary machine. The electromagnetic clutch is disengaged so that the crankshaft and the pulley can rotate relative to each other, 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 Literature 2 includes a flat accessory driving motor connected to a crankshaft of an engine via an electromagnetic clutch, separately from the motor generator, and is attached to the accessory driving motor. The V-belt is wound around the pulley and the auxiliary machine pulley, and the electromagnetic clutch is disengaged when the engine is stopped so that the auxiliary machine can be driven by the auxiliary machine drive motor.
[0005]
Patent Literature 3 discloses a variable displacement compressor for an air conditioner of a hybrid vehicle. A rotary main shaft of the compressor is connected to an engine via an electromagnetic clutch and connected to a motor via a reduction gear. When the engine is stopped, the electromagnetic clutch is disengaged so that the motor can drive the compressor.
[0006]
[Patent Document 1]
JP-A-8-14145
[Patent Document 2]
JP 2001-298804 A
[Patent Document 3]
JP-A-11-287182
[0007]
[Problems to be solved by the invention]
However, the conventional hybrid vehicle described above has the following problems.
In the case of Patent Literature 1, the V-belt hung on the auxiliary machine also serves as the engine start belt by the motor generator, so that the transmission capacity applied to the belt becomes very large, and therefore the number of V-belts is increased. It is necessary (for example, about 10 peaks), and the shaft length required for attaching the pulley becomes long, which deteriorates the mountability.
Also, as in Patent Document 2, when an accessory driving motor is arranged coaxially with the engine and a pulley is attached to the main shaft of the accessory driving motor, the shaft length becomes long and the mountability is poor.
In addition, if the V-belt for driving auxiliary equipment also serves as the belt for starting the engine, it is necessary to temporarily reduce the rotation of the motor to zero before starting the engine when driving the auxiliary equipment with the motor when the engine is stopped. As a result, the drive of the auxiliary equipment becomes discontinuous, and the commercial value decreases.
[0008]
Further, recent internal combustion engines tend to use the engine at an increased maximum rotational speed in order to improve the output per displacement. However, in any of Patent Documents 1 to 3, the electromagnetic clutch is connected and the engine is connected. When the accessory is driven by the engine, since the accessory is driven in proportion to the engine speed, the maximum number of revolutions of the engine is limited due to the operating speed range of the accessory. For example, in an engine with a maximum rotation speed of 7000 rpm, the generator is normally driven with a pulley ratio of about 2.5, so the maximum rotation speed of the generator is 17500 rpm. Because of the closeness, it is difficult to increase the maximum engine speed with the pulley ratio fixed at about 2.5. On the other hand, if it is possible to lower the pulley ratio and use it near one-to-one, for example, if the pulley ratio is set to 0.9, the maximum engine speed can be set to 20,000 rpm. However, with such a pulley ratio, the idling speed of the engine is around 700 rpm, so that the idling speed of the engine is lower than the regenerable speed of the alternator at the time of idling. It becomes. For this reason, it is necessary to increase the idling rotational speed to about 1750 rpm, which is about 2.5 times. However, doing so degrades the fuel efficiency. For these reasons, the maximum engine speed is currently limited to about 7000 rpm.
[0009]
In addition, when the accessory is driven by the engine with the electromagnetic clutch connected, the accessory is not always used at the optimum speed because the accessory is driven in proportion to the engine 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 is based on the engine speed proportional to the vehicle acceleration and running speed. It will be decided. Therefore, in order to properly control the temperature, it is necessary to take measures such as using a heater in combination or using a variable displacement compressor as disclosed in Patent Document 3, but using the heater in combination is usually unnecessary excessive cooling. This is not preferable in terms of fuel efficiency because it uses capacity, and the variable displacement compressor has a complicated structure, is expensive, and is disadvantageous in cost.
[0010]
In each 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 consumption increases. Not only does consumption deteriorate, but it also causes fluctuations in the rotation of the engine and causes noise and vibration. In particular, when a constant capacity compressor is used in combination with a heater 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 using the motor / generator, so that the battery (high and low voltage) tends to rise, and depending on the state of charge of the battery, it becomes impossible to drive auxiliary equipment. This makes it difficult to control the accessories.
Accordingly, the present invention provides a compact accessory drive device for an internal combustion engine, which can drive the accessory machine asynchronously with the engine, and can operate the accessory machine with high efficiency.
[0012]
[Means for Solving the Problems]
In order to solve the above problem, the invention according to claim 1 is attached to a crankshaft (for example, a crankshaft 22 in an embodiment to be described later) of an internal combustion engine (for example, an engine 1 in an embodiment to be described later). A motor generator (for example, a motor generator 2 in an embodiment to be described later) and an auxiliary device driving motor (for example, an auxiliary device driving device in an embodiment to be described later) disposed concentrically outside the motor generator. A motor 9), and a pulley (for example, a pulley portion 46a in an embodiment to be described later) is provided on a rotor (for example, a rotor 46 in an embodiment to be described later) of the accessory driving motor. Of the internal combustion engine.
With this configuration, the auxiliary equipment can be driven by the auxiliary equipment driving motor even when the internal combustion engine is stopped, and the auxiliary equipment is driven by the auxiliary equipment driving motor asynchronously with the internal combustion engine even during the operation of the internal combustion engine. Can be driven.
[0013]
According to a second aspect of the present invention, in the first aspect, a rotor of the auxiliary device driving motor is rotatably supported by the crankshaft.
With this configuration, the auxiliary device driving motor can be easily arranged concentrically outside the motor generator.
[0014]
According to a third aspect of the present invention, in the first or second aspect, 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) according to an embodiment described later is characterized in that it is formed continuously and integrally in the radial direction.
With this configuration, it is possible to reduce the size and weight of the stator of the motor generator and the stator of the accessory driving motor.
[0015]
According to a fourth aspect of the present invention, in the invention according to any one of the first to third aspects, a motor generator (for example, a motor generator according to an embodiment described later) is provided at both ends of a crankshaft of the internal combustion engine. 2, 14), and the accessory driving motor is provided outside one of these motor generators (for example, a motor generator 2 in an embodiment described later).
With this configuration, the motor generator is divided into two parts, so that the degree of freedom in mounting on the vehicle is increased.
[0016]
The invention according to claim 5 is the invention according to claim 4, wherein the number of pole pairs of one of the two motor generators (for example, the motor generator 14 in an embodiment described later) is the other. (For example, a motor generator 2 in an embodiment to be described later) is an integral multiple of the number of pole pairs, and both motor generators are DC brushless motors driven through a common inverter. Features.
With this configuration, the two motor generators have common electric characteristics, and can share a three-phase line and an inverter.
[0017]
According to a sixth aspect of the present invention, in the invention according to any one of the first to fifth aspects, the rotational speed ratio between the auxiliary device driving motor and the auxiliary device driven by the auxiliary device driving motor is the same as the above. The driving efficiency of the accessory driving motor is set to be equal to or higher than a predetermined value, and the driving efficiency of the auxiliary device is set to be equal to or higher than a predetermined value.
With this configuration, it is possible to efficiently operate the accessory driving motor and the accessory.
[0018]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an embodiment of an accessory drive device for an internal combustion engine according to the present invention will be described with reference to FIGS. 1 to 7.
[First Embodiment]
First, a first embodiment of an accessory drive device for an internal combustion engine (hereinafter, abbreviated as an accessory drive device) according to the present invention will be described with reference to FIGS. 1 to 3.
FIG. 1 is a schematic configuration diagram of a parallel-type hybrid vehicle V including an accessory 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 a motor capable of generating electric power, and the driving force of both the engine 1 and the motor / generator 2 is transmitted to the driving wheels 4 via the automatic transmission 3. When the driving force is transmitted from the driving wheels 4 to the motor generator 2 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 drive and the regenerative operation of the motor / generator 2 are performed 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. The power drive unit 6 is connected to a high-voltage battery 7 that exchanges electric energy with the motor generator 2.
The battery 7 is connected to an inverter 8. The inverter 8 is controlled by the ECU 5, converts DC power of the battery 7 into AC power, and supplies the AC power to the auxiliary machine driving motor 9.
[0020]
The accessory driving motor 9 has a pulley 46a, and the V-belt 13 is wound around the pulley 46a and the pulley 12 of the accessory 11, so that the accessory 11 is driven by the accessory driving motor 9. Is configured. Here, as the accessory 11, for example, a power steering drive, a compressor for an air conditioner, a water pump, and the like can be exemplified, and FIGS. 1 and 2 show one of them as a representative. Therefore, actually, each auxiliary machine is provided with one pulley 12, and the V belt 13 is wound around each pulley 12.
Here, the motor generator 2 and the accessory driving motor 9 form the main components of the accessory driving device 10.
[0021]
Next, with reference to FIG. 2 and FIG. 3, the configuration of the motor generator 2 and the accessory driving motor 9 which are main components of the accessory driving device 10 will be described. 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 of the same.
One end 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 22a. The rotor 31 has 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 outside the rotor 31 with a predetermined gap in the radial direction. The stator 33 is fixed to an inner peripheral surface of a cylindrical stator holding ring 34 fixed to the crankcase 21. The stator 33 has a radially connected back yoke portion 35a and a back yoke portion 35a. It comprises an iron core 35 formed by laminating a number of electromagnetic steel sheets 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]
A stator 41 of the accessory driving motor 9 is arranged outside the stator 33 of the motor generator 2. The stator 41 is fixed to an outer peripheral surface of a cylindrical stator holding ring 42 which is covered by a stator holding ring 34 of the motor / generator 2 and fixed to the crankcase 21 by bolts 23 together with the stator holding ring 34. The stator 41 includes an iron core 43 formed by stacking a large number of electromagnetic steel plates each having a back yoke portion 41a connected in an annular shape and a tooth portion 41b extending radially outward from the back yoke portion 41a. And a stator winding 45 wound around a bobbin 44.
[0023]
Further, a rotor 46 of the accessory driving motor 9 is arranged outside the stator 41. The rotor 46 is rotatably supported on the crankshaft 22 via the bearing 25, and has a pulley 46 a surrounding the stator 41 in the radial direction and a hub rotatably mounted on the crankshaft 22 via the bearing 25. A portion 46b, a disk portion 46c disposed axially outside of the crankshaft 22 with respect to the stator 41 and the motor / generator 2 of the accessory driving motor 9 and connecting the pulley portion 46a and the hub portion 46b; It is constituted by a number of permanent magnet pieces 48 fixed to the inner peripheral surface of the portion 46a, and has a predetermined gap in the radial direction between the permanent magnet piece 48 and the stator 41.
The accessory driving motor 9 composed of a DC brushless motor is constituted by the stator 41 and the rotor 46.
[0024]
That is, the accessory driving motor 9 is arranged concentrically outside the motor generator 2 in the radial direction, and the rotor 46 of the accessory driving motor 9 is rotatably supported by the crankshaft 22. Therefore, the rotor 46 of the accessory driving motor 9 can rotate asynchronously with the crankshaft 22 of the engine 1, and the rotor 46 of the accessory driving motor 9 can rotate even while the engine 1 is stopped.
The accessory driving V-belt 13 is wound around a pulley portion 46 a of the rotor 46 of the accessory driving motor 9. That is, the rotor 46 of the accessory driving motor 9 also serves as a pulley, and it can be said that the rotor 46 is provided with a pulley.
[0025]
In the accessory drive device 10 configured as described above, the accessory drive motor 9 is configured to rotate asynchronously with the engine 1 only with its rotor 46 rotatably supported by the crankshaft 22. In addition, since there is no electromagnetic clutch between the accessory driving motor 9 and the engine 1, there is no vibration, noise, or power consumption due to engagement / disengagement of the electromagnetic clutch.
The auxiliary equipment 11 can be driven by the auxiliary equipment driving motor 9 even when the engine 1 is stopped, and the auxiliary equipment 11 is driven by the auxiliary equipment driving motor 9 asynchronously with the engine 1 even during the operation of the engine 1. Since the drive can be performed, the rotation speed of the accessory 11 can be determined based on the vehicle body request, and can be determined regardless of the rotation speed of the engine 1. As a result, it is possible to achieve both small size and low rotation of the auxiliary device 11 and high rotation of the engine 1.
[0026]
Further, the start of the engine 1 is performed by the motor / generator 2, and the accessory driving motor 9 does not participate in the start of the engine 1. Therefore, it is not necessary to stop the accessory 11 when the engine 1 is started. Since the auxiliary equipment 11 can be operated continuously, the commercial value is improved.
Further, since the accessory driving motor 9 is not involved in starting the engine 1, the transmission capacity of the accessory driving V-belt 13 can be reduced, the number of peaks of the V-belt 13 can be reduced, and the The shaft length of the crankshaft 22 required for the mounting is short.
In addition, the portion where the motor generator 2 and the accessory driving motor 9 are arranged concentrically is a portion where the pulley for driving the accessory by the engine 1 is conventionally attached. Thus, the axial length of the crankshaft 22 does not become longer than that of the first embodiment.
[0027]
Further, the pulley portion 46a of the accessory driving motor 9 and the pulley 12 of the plurality of accessories 11 can be set to be freely adjustable with respect to each other, but the driving efficiency of the accessory driving motor 9 is higher than a predetermined efficiency. In addition, the rotation speeds of the accessory drive motor 9 and the accessory 11 are set so that the driving efficiency of each accessory 11 is higher than a predetermined efficiency, and the pulley ratio is set so that the rotation speed ratio is obtained. When the pulley ratio is set in such a manner, it is possible to efficiently operate the accessory driving motor 9 and each of the accessories 11, and sufficiently exhibit the performance of each of the accessories 11. Power consumption can be reduced.
[0028]
[Second embodiment]
Next, a second embodiment of the accessory drive device 10 according to the present invention will be described with reference to the drawing of FIG.
The difference between the accessory drive device 10 of the second embodiment and the accessory drive device 10 of the first embodiment is that the stator holding ring 34 and the accessory drive motor 9 of the motor / generator 2 in the first embodiment are different. The stator holding ring 42 of FIG.
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 is supplemented outside. The stator 41 of the machine drive motor 9 is fixed.
Other configurations are the same as those of the first embodiment, and therefore, the same reference numerals are given to the same aspects, and description thereof will be omitted.
In the accessory drive device 10 according to the second embodiment, in addition to the operation of the above-described first embodiment, the number of components can be reduced and the weight can be reduced.
[0029]
[Third Embodiment]
Next, a third embodiment of the accessory drive device 10 according to the present invention will be described with reference to FIGS. The differences between the accessory drive device 10 of the third embodiment and the accessory drive device 10 of the first embodiment are 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 auxiliary device driving device 10 are integrated to share a back yoke portion, and the integrated iron core is connected to the stator. It is directly fixed to the crankcase 21 and the oil pan without using a retaining ring.
[0030]
FIG. 6 is a front view of the motor generator 2 and the accessory driving motor 9 as viewed from the axial direction. The iron core 52 is formed by laminating a large number of electromagnetic steel plates having a substantially cross shape in a front view, a common back yoke portion 52a is formed in a central portion, and a tooth portion 52b of the motor generator 2 is formed radially inward from the back yoke portion 52a. The teeth portion 52c of the accessory driving motor 9 extends radially outward from the back yoke portion 52a. As shown in FIG. 5, the stator winding 37 is wound around the teeth 52b of the iron core 52 via the bobbin 36 to form the stator 33 of the motor generator 2, and the teeth 52c are connected to the teeth 52b via the bobbin 44. The stator winding 45 is wound to form the stator 41 of the accessory driving motor 9.
That is, the stator 33 of the motor generator 2 and the stator 41 of the auxiliary machine driving motor 9 are integrally formed continuously in the radial direction.
[0031]
A large number of iron cores 52 configured as described above are arranged on a circumference, and bolts 53 are inserted into mounting holes 52d provided in a back yoke portion 52a of each iron core 52, and the bolts 53 are attached to mounting seats of the crankcase 21. By screwing and fixing the back yoke 24, the back yoke portion 52a is connected in an annular shape.
Other configurations are the same as those of the first embodiment, and therefore, the same reference numerals are given to the same aspects, and description thereof will be omitted.
In the accessory drive device 10 according to the third embodiment, in addition to the operation of the first embodiment, the stator 33 of the motor generator 2 and the stator 41 of the accessory drive motor 9 are reduced in size and weight. And the on-board performance is improved.
[0032]
[Fourth Embodiment]
Next, a fourth embodiment of the accessory drive device 10 according to the present invention will be described with reference to the drawing of FIG. The difference between the accessory drive device 10 of the fourth embodiment and the accessory drive device 10 of the first embodiment is as follows.
The only difference between the accessory drive device 10 of the fourth embodiment and the accessory drive device 10 of the first embodiment is that the accessory drive device 10 includes two motor generators.
More specifically, the accessory drive device 10 according to the fourth embodiment includes a motor generator 2 and an accessory drive motor 9 at one end of a 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 generator 22. The motor / generator 14 is sandwiched between the engine 1 and the automatic transmission 3, and the rotor (not shown) of the motor / generator 14 is fixed to the other end of the crankshaft 22. Of input shafts (not shown) are connected.
[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 be an integral multiple of the number of pole pairs of the motor generator 2. Have 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 wheels 4 via the automatic transmission 3, and when the hybrid vehicle V is decelerated, the driving wheels 4 When the driving force is transmitted from the motor generators 2 and 14 to the motor generators 2 and 14, both 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 converted into electric energy to the battery. to recover.
Other configurations are the same as those of the first embodiment, and therefore, the same reference numerals are given to the same aspects, and description thereof will be omitted.
[0035]
The accessory drive device 10 according to the fourth embodiment has the following operation in addition to the operation of the first embodiment described above.
Since it is divided into two motor generators 2 and 14, 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 in output, the output required for the vehicle V can be sufficiently secured by combining the two motor generators 2 and 14. . Also, by dividing the motor / generator into two, the degree of freedom in the vehicle is increased.
Since the two motor generators 2 and 14 share a three-phase wire and an inverter, the mounting space can be reduced as compared with a case where each of the motor generators 2 and 14 has a three-phase wire and an inverter. In addition, the weight can be reduced. That is, reduction in size and weight can be achieved, and vehicle mountability is also improved.
[0036]
In addition, in addition to the fourth embodiment, when the two motor generators 2 and 14 are driven via separate inverters, one of the motor generators 2 and 14 performs the power generation and electric operation by the engine. If control is performed so as to suppress the torsional vibration of the first crankshaft 22, the vibration of the entire power plant can be suppressed, and the commercial value is improved, which is preferable. Generally, since the torsional vibration of the crankshaft 22 is small on the automatic transmission 3 side and large on the motor generator 9 side (the pulley portion 46a side), the operation of the motor generator 2 is torque opposite to the rotational fluctuation of the engine 1 in torque. It is preferable to control the vibration so as to reduce the vibration by generating the vibration.
[0037]
[Other embodiments]
Note that the present invention is not limited to the above-described embodiment.
For example, in the above-described embodiment, the auxiliary device 11 is driven by a belt, but may be driven by a chain.
[0038]
【The invention's effect】
As described above, according to the first aspect of the present invention, the auxiliary machine can be driven by the auxiliary machine driving motor even when the internal combustion engine is stopped, and the auxiliary machine is operated asynchronously 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 independently of the engine rotation speed. As a result, there is an excellent effect that it is possible to achieve both small size and low rotation speed of the accessory and high rotation speed of the engine.
According to the invention of claim 2, there is an effect that the auxiliary device driving motor can be easily arranged concentrically outside the motor generator.
[0039]
According to the third aspect of the present invention, it is possible to reduce the size and weight of the stator of the motor / generator and the stator of the auxiliary device driving motor.
According to the fourth aspect of the present invention, since the motor generator is divided into two, there is an effect that the degree of freedom of mounting on a vehicle is increased.
[0040]
According to the fifth aspect of the invention, the two motor generators have common electric characteristics and can share the three-phase wire and the inverter, so that the size and weight can be reduced. In addition, there is an effect that the on-board property is also improved.
According to the invention of claim 6, since the accessory driving motor and the accessory can be operated efficiently, the performance of the accessory can be sufficiently exhibited, and the power consumption is suppressed. There is an effect that can be.
[Brief description of the drawings]
FIG. 1 is a schematic configuration diagram of a first embodiment of a hybrid vehicle including an accessory drive device according to the present invention.
FIG. 2 is a conceptual diagram of an accessory driving device according to the first embodiment.
FIG. 3 is a cross-sectional view showing an accessory driving device in the first embodiment in detail.
FIG. 4 is a cross-sectional view illustrating an accessory driving device according to a second embodiment in detail.
FIG. 5 is a sectional view showing an accessory driving device in a third embodiment in detail.
FIG. 6 is a front view of the accessory driving device according to the third embodiment as viewed from an axial direction.
FIG. 7 is a conceptual diagram of an auxiliary device driving device according to a fourth embodiment.
[Explanation of symbols]
1 engine (internal combustion engine)
2 Motor generator
9 Auxiliary drive motor
10 Auxiliary equipment drive
11 Auxiliary equipment
14 Motor generator
22 crankshaft
33 Stator (motor / generator stator)
41 Stator (Auxiliary drive motor stator)
46 rotor
46a Pulley (Pulley)

Claims (6)

A motor generator attached to a crankshaft of the internal combustion engine; and an auxiliary device driving motor arranged concentrically outside the motor generator. A pulley is provided on a rotor of the auxiliary device driving motor. An auxiliary device driving device for an internal combustion engine. The accessory drive device for an internal combustion engine according to claim 1, wherein a rotor of the accessory drive motor is rotatably supported by the crankshaft. 3. The accessory drive device for an internal combustion engine according to claim 1, wherein the stator of the motor generator and the stator of the accessory drive motor are formed continuously and integrally in a radial direction. . 4. The motor according to claim 1, further comprising a motor generator provided at both ends of a crankshaft of the internal combustion engine, and the auxiliary device driving motor provided outside one of the motor generators. 5. An auxiliary drive device for an internal combustion engine according to any one of the above. The number of pole pairs of one of the two motor generators is an integer 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 accessory drive device for an internal combustion engine according to claim 4, wherein the accessory drive device is a motor. The rotational speed ratio of the auxiliary device driving motor and the auxiliary device driven by the auxiliary device driving motor is such that the driving efficiency of the auxiliary device driving motor is not lower than a predetermined value, and the driving efficiency of the auxiliary device is not lower than a predetermined value. The auxiliary device driving device for an internal combustion engine according to any one of claims 1 to 5, wherein the driving device is set so that:

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