JPH11208297A - Hybrid vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enhance rapid starting performance and rapid acceleration performance using driving force of internal combustion engine in a hybrid vehicle having an internal combustion engine and a generation motor as power sources for driving. SOLUTION: This planet gear mechanism 4 transmits and distributes a driving force between an internal combustion engine E, a generation motor GM and a driving wheel. The planet gear mechanism 4 comprises a planetary carrier 5 which is connected to an internal combustion engine output member 1, a ring gear 6 which is connected to a generation motor output member 2, and a sun gear 7 which is connected to a driving force output member 3. When a vehicle starts and accelerates rapidly, a clutch 9 is engaged to restrict a differential of the planet gear mechanism 4. This integrates the internal combustion engine output member 1, the generation motor output member 2, and the driving force output member 3, so that a driving force of the internal combustion engine can be transmitted directly to the driving force output member 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a hybrid vehicle provided with an internal combustion engine and a generator motor as power sources for traveling.

[0002]

2. Description of the Related Art Such a hybrid vehicle is already known, for example, from Japanese Patent Application Laid-Open No. Hei 9-175203. The hybrid vehicle uses a planetary gear mechanism for power transmission means, a planetary carrier is connected to the internal combustion engine,
The sun gear is connected to the generator motor, and the ring gear is connected to the drive wheels. Then, the vehicle travels by transmitting the rotation of the internal combustion engine or the generator motor to the driving wheels, and generates power by transmitting the rotation of the internal combustion engine or the driving wheels to the generator motor.

[0003]

However, when the internal combustion engine is driven to make a sudden start or a sudden acceleration, the driving force of the internal combustion engine is applied to the drive wheels and the generator motor via a planetary gear mechanism. Since the driving force is distributed and the amount of distribution of the driving force is increased to the generator motor side where the load is smaller than that of the driving wheels, the driving force of the internal combustion engine cannot be sufficiently transmitted to the driving wheels. There is a problem that it is difficult to enhance rapid acceleration performance.

The present invention has been made in view of the above-mentioned circumstances, and in a hybrid vehicle having an internal combustion engine and a generator motor as a power source for traveling, a sudden start performance and a rapid acceleration performance by the driving force of the internal combustion engine are improved. The purpose is to:

[0005]

In order to achieve the above object, an invention according to claim 1 includes an internal combustion engine output member connected to an internal combustion engine and a generator motor output member connected to a generator motor. Power transmission means for transmitting and distributing the driving force to and from the driving force output member connected to the driving wheels, and transmitting the rotation of the internal combustion engine output member or the generator motor output member to the driving force output member. A hybrid vehicle that travels while transmitting the rotation of the internal combustion engine output member or the driving force output member to the generator motor output member to generate electric power, and has a clutch capable of coupling the internal combustion engine output member to the driving force output member. It is characterized by.

According to the above configuration, when the internal combustion engine is driven in a state where the output member of the internal combustion engine is connected to the driving force output member by the clutch, the driving force of the internal combustion engine can be directly transmitted to the driving wheels. The starting performance and sudden acceleration performance are improved.

According to a second aspect of the present invention, in addition to the configuration of the first aspect, the main drive wheels are driven by the internal combustion engine, and the auxiliary drive wheels are driven by the electric power generated by the generator motor. And

According to the above configuration, the main drive wheels and the generator motor are driven by the internal combustion engine, and the auxiliary drive wheels are driven by the electric power generated by the generator motor. Therefore, four-wheel drive can be realized with a simple structure. .

According to a third aspect of the present invention, in addition to the configuration of the second aspect, a left and right electric motors for driving the left and right auxiliary driving wheels are provided.

According to the above configuration, by driving the left and right sub-drive wheels by the left and right electric motors, respectively, different driving forces can be distributed to the left and right sub-drive wheels to control the yaw moment of the vehicle.

According to a fourth aspect of the present invention, in addition to the configuration of the first aspect, a lock means for regulating the rotation of the output member of the internal combustion engine during reverse running is provided.

According to the above construction, the rotation of the output member of the internal combustion engine is restricted by the locking means when the generator motor is driven to drive the vehicle backward, thereby preventing the internal combustion engine from being reversely driven. be able to.

According to a fifth aspect of the present invention, in addition to the configuration of the first aspect, the power transmission means is a planetary gear mechanism, and a planetary carrier, a ring gear and a sun gear are provided with the output member of the internal combustion engine. The motor output member and the driving force output member are connected to each other.

According to the above configuration, the transmission and distribution of the driving force among the internal combustion engine output member, the generator motor output member, and the driving force output member can be performed with a simple structure by using the planetary gear mechanism as the power transmission means. be able to.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described based on embodiments of the present invention shown in the accompanying drawings.

FIG. 1 and FIG. 2 show a first embodiment of the present invention. FIG.
FIG. 3 is a skeleton diagram of a power unit of the hybrid vehicle.

As shown in FIG. 1, a four-wheel drive hybrid
The vehicle is the left and right front wheels W, which are the main driving wheels. _FL, W_FRAnd auxiliary drive wheels
Left and right rear wheel W_RL, W_RRAnd left and right front wheels
W_FL, W_FRBy the internal combustion engine E and the first generator motor GM
Right and left rear wheels W_RL, W_RRAre the left and right
2 generator motor GM_L, GM_RDriven by First shot
Electric motor GM and left and right second generator motors GM_L, GM
_RFunction as electric motors and generate driving force
Function as a generator and generate no regenerative braking force.
Generates power.

Referring to FIG. 2 together, it is apparent that
An annular generator motor output member 2 connected to the rotor of the first generator motor GM and front wheels W _FL , W _FR are provided on the outer periphery of an axial internal motor output member 1 connected to the crankshaft of the internal combustion engine E.
And a cylindrical driving force output member 3 connected coaxially therewith, the internal combustion engine output member 1, the generator motor output member 2
The driving force output member 3 is connected to the driving force output member 3 via a planetary gear mechanism 4 as power transmission means. The planetary gear mechanism 4 includes a planetary carrier 5, a ring gear 6, a sun gear 7
And a plurality of planetary gears 8 supported by the planetary carrier 5 and meshing with the ring gear 6 and the sun gear 7. The planetary carrier 5 is fixed to the internal combustion engine output member 1, and the ring gear 6 is fixed to the generator motor output member 2. Then, the sun gear 7 is fixed to the driving force output member 3.

The generator motor output member 2 and the driving force output member 3 can be integrally connected by a wet multi-plate clutch 9. A lock means 1 comprising an electromagnetic clutch is provided between the internal combustion engine output member 1 and a casing (not shown) in order to restrict the internal combustion engine E from rotating in a direction opposite to the rotation direction.
0 is provided. The final drive gear 11 provided on the driving force output member 3 is the first intermediate gear 1 provided on the intermediate shaft 12.
The second intermediate gear 14 provided on the intermediate shaft 12 meshes with the final driven gear 16 provided on the differential 15. The differential 15 is connected to left and right front wheels W _FL and W _FR via left and right front wheel drive shafts 17 _L and 17 _R.

Left and right second generator motors GM_L, GM_RIs
Left and right reduction gears 18 each of planetary gear type_L, 18_RAnd
And left and right rear wheel drive shaft 19_L, 19_RThrough the left and right rear wheels
W_RL, W_RRConnected to. Reducer 18_L, 18_RIs
Gear is the second generator motor GM _L, GM_RConnected to the
The rear carrier is the rear wheel drive shaft 19._L, 19_RConnected to
And the ring gear is fixed to the casing (not shown) so that it cannot rotate.
Is done.

A first generator motor GM and left and right second generators
Motor GM_L, GM_RAnd the battery 20 are connected to the inverter
PDU21 (power drive unit) consisting of
Connected. The PDU 21 is the first one generated by the battery 20.
Electric motor GM and second generator motor GM_L, GM_RNo drive
And the first generator motor GM and the second generator motor G
M _L, GM_RControl of charging of battery 20 by regeneration of battery
I do.

Next, the operation of the embodiment of the present invention having the above configuration will be described. By engaging the clutch 9 at the time of starting and integrally connecting the ring gear 6 and the sun gear 7 of the planetary gear mechanism 4, the output member 1 of the internal combustion engine, the generator motor output member 2 and the driving force output member 3 are integrated. 1. Drive the generator motor GM. As a result, the rotation of the generator motor output member 2 of the first generator motor GM is transmitted to the driving force output member 3 via the clutch 9, and the rotation of the driving force output member 3 is transmitted to the final drive gear 11 and the first intermediate gear 13. , the intermediate shaft 12, second intermediate gear 14, the final driven gear 16, left and right front wheels W _FL via a differential 15 and the front wheel drive shaft 17 _L, 17 _R, is transmitted to the W _FR. At this time, the internal combustion engine E is forcibly driven by the rotating internal combustion engine output member 1, but the internal combustion engine E is controlled by the valve stop mechanism so as not to generate a pumping loss, and idles without load. The wheels W _RL, W _RR after the left and right, the second motor generator GM _L of the left and right powered from the battery 20, is driven by GM _R.

[0023] Thus, since the start of the vehicle by a large first motor generator GM and the left and right second motor generator GM _L, GM _R of speed torque compared to the internal combustion engine E, it enables smooth start is.

If the remaining capacity of the battery 20 is not sufficient when the vehicle starts, the internal combustion engine E is driven with the clutch 9 released and the ring gear 6 and the sun gear 7 of the planetary gear mechanism 4 disconnected. As a result, the torque of the internal combustion engine output member 1 connected to the internal combustion engine E is distributed to the generator motor output member 2 and the driving force output member 3 via the planetary gear mechanism 4. That is, when the planetary carrier 5 integrated with the internal combustion engine output member 1 rotates, the first generator motor GM connected to the ring gear 6 and the driving force output member 3 connected to the sun gear 7 rotate according to their loads. Rotate by number. Thus, the front wheel W connected to the driving force output member 3
_FL, W _FR is driven vehicle is starting, also with the battery 20 is charged by the power which the first generator-motor GM is the generator, the second motor generator GM _L of left and right electric power, the GM _R is driven Rear wheels W _RL , W _RR to assist in starting the vehicle
Is driven.

When the driving force transmitted from the internal combustion engine E to the front wheels W _FL and W _FR is insufficient, the clutch 9 is engaged with a predetermined engagement force to limit the differential of the planetary gear mechanism 4. The driving force transmitted to the front wheels W _FL and W _FR can be increased.

When the first generator motor GM drives the front wheels W _FL and W _FR to start the vehicle, fuel injection is started and the idling internal combustion engine E starts when the vehicle speed reaches a predetermined value. At the same time, the driving of the first generator motor GM is stopped, and the engagement of the clutch 9 is released. As a result, the driving force of the internal combustion engine E is transmitted to the front wheels W _FL and W _FR in the same manner as when the vehicle is started by the internal combustion engine E described above. During normal running of the vehicle, the driving force transmitted from the internal combustion engine E to the front wheels W _FL and W _FR is controlled by adjusting the load on the first generator motor GM in accordance with an increase in the output of the internal combustion engine E. while, the second motor generator GM _L of the right and left with the power first generator-motor GM is the generator, to drive the GM _R assisting the acceleration of the vehicle. The left and right second motor generator GM _L,
By providing a difference in driving force of GM _R, it is possible to enhance the turning performance and straight running stability by controlling the yaw moment of the vehicle. In this case, the left and right second generator motors G
It is also possible to M _L, and drives one of the GM _R regenerating the other. At the time when the vehicle cruises cruise, left and right of the second generator-motor GM _L,
Discontinue assist by GM _R, it is driven only by the driving force of the internal combustion engine E. In this case, the first motor generator GM or left and right second motor generator GM _L, the GM _R to function as an alternator, it charges the auxiliary battery 12 volt power generated. At the time of sudden start and sudden acceleration The sudden start and sudden acceleration requiring a large driving force are the first.
This is performed by the internal combustion engine E that can generate a larger driving force than the generator motor GM. If the internal combustion engine E is driven in a state where the engagement of the clutch 9 is released, the driving force is distributed to the generator motor output member 2 and the drive force output member 3 by the planetary gear mechanism 4, but the first generator motor GM Since the load is smaller than the load on the front wheels W _FL and W _FR , most of the driving force is distributed to the first generator motor GM, and the front wheels W _FL and W _FR cannot be effectively driven and sudden start And cannot accelerate rapidly.

Therefore, at the time of sudden start and rapid acceleration, the internal combustion engine E is driven with the clutch 9 engaged. Since the internal combustion engine output member 1, the generator motor output member 2 and the driving force output member 3 are integrated by engaging the clutch 9, the large driving force of the internal combustion engine E is directly transmitted to the front wheels W _FL and W _FR . As a result, the sudden start performance and the sudden acceleration performance of the vehicle can be enhanced. At this time, the left and right second motor generator GM _L, by driving the GM _R, it is possible to further increase the sudden acceleration performance and rapid acceleration performance. When the vehicle is traveling in reverse, the internal combustion engine E is stopped, the clutch 9 is disengaged, the ring gear 6 and the sun gear 7 of the planetary gear mechanism 4 are disconnected, and the locking means 10 composed of an electromagnetic clutch is operated to operate the internal combustion engine. In a state where the rotation of the output member 1 is regulated, the first generator motor GM is driven in the normal rotation direction (forward direction). At this time, since the rotation of the planetary carrier 5 integral with the internal combustion engine output member 1 is regulated, the rotation of the ring gear 6 integral with the generator motor output member 2 causes the driving force output member 3 to rotate through the planetary gear 8 and the sun gear 7. The vehicle is driven in reverse to drive the vehicle backward. At the same time, the second motor generator GM _L of right and left power from the battery 9, GM _R is reversely driven, to assist the first generator-motor GM. At the time of braking of the vehicle, the internal combustion engine E is subjected to fuel cut to make no load, and then the clutch 9 is engaged to apply the front wheels W _FL ,
By reverse transmitting the rotation of the W _FR to the first generator-motor GM, to generate a regenerative braking force to the first motor generator GM. The generated regenerative power is used for charging the battery 9. The rear wheels W _RL, W _RR second motor generator GM _L rotates the left and right of, G
Inversely transmitted to the M _R to generate a regenerative braking force, to charge the battery 9 by the regenerative electric power generated.

Next, the second embodiment of the present invention will be described with reference to FIGS.
An eighth embodiment will be described. In the second to eighth embodiments, components corresponding to the components of the first embodiment described above are denoted by the same reference numerals as those of the first embodiment.

FIG. 3 shows a second embodiment of the present invention.
In the first embodiment of FIG. 2, the clutch 9 directly connects the ring gear 6 and the sun gear 9 of the planetary gear mechanism 4, whereas in the second embodiment of FIG. Has been arranged. Reduction gear train 31
Is a first gear 32 provided integrally with the generator motor output member 2.
And a fourth gear 34 provided integrally with the clutch outer 33.
A second gear 36 provided on the intermediate shaft 35 and meshing with the first gear 32; and a fourth gear 3 provided on the intermediate shaft 35.
4 and a third gear 37 that meshes with the third gear 37.

According to this embodiment, not only the reduction ratio between the generator motor output member 2 and the driving force output member 3 can be arbitrarily set by the reduction gear train 31, but also a sufficient reduction ratio can be easily ensured. be able to. However, since the reduction gear train 31 is deviated from the center line of the power unit in the radial direction, it is difficult to arrange the reduction gear train 31 compactly.

FIG. 4 shows a third embodiment of the present invention.
The third embodiment differs from the second embodiment in FIG. 3 in the structure of the reduction gear train 31. That is, the reduction gear train 31 composed of a planetary gear mechanism includes a planetary carrier 38 fixed to a casing, a plurality of planetary gears 39 supported by the planetary carrier 38, and the generator motor output member 2.
And a sun gear 41 fixed to the clutch outer 33 and engaged with the planetary gear 39.

According to this embodiment, not only the reduction ratio between the generator motor output member 2 and the driving force output member 3 can be arbitrarily set by the reduction gear train 31, but also the reduction gear train 31 is connected to the center line of the power unit. Can be placed compactly on top.

FIG. 5 shows a fourth embodiment of the present invention.
The planetary gear mechanism 4 of the fourth embodiment does not include a ring gear, but instead has a second planetary gear 8 'supported on the same shaft as the planetary gear 8;
Second sun gear 7 'rotatably supported coaxially with the second sun gear 7'
The second sun gear 7 ′ is integrally connected to the clutch outer 33. The gear ratio between the planetary gear 8 and the sun gear 7 is set to be different from the gear ratio between the second planetary gear 8 ′ and the second sun gear 7 ′. Therefore, by changing the slip amount of the clutch 9, Generator motor output member 2 and driving force output member 3
The speed reduction ratio between them can be adjusted.

According to this embodiment, the planetary gear mechanism 4 tends to be large, but a sufficient reduction ratio between the generator motor output member 2 and the driving force output member 3 can be ensured.

FIGS. 6 to 9 show the fifth to eighth embodiments of the present invention, respectively.
Embodiments are shown, and these fifth to eighth embodiments correspond to the above-described first to fourth embodiments, respectively. That is, the fifth embodiment of FIG. 6 is a modification of the first embodiment of FIG.
The sixth embodiment is a modification of the second embodiment of FIG. 3, the seventh embodiment of FIG. 8 is a modification of the third embodiment of FIG. 4, and the eighth embodiment of FIG. This is a modification of the fourth embodiment.

In the first to third embodiments shown in FIGS. 2 to 4, the generator motor output member 2 is connected to the ring gear 6 of the planetary gear mechanism 4, and the driving force output member 3 is connected to the sun gear 7 of the planetary gear mechanism 4. The connection is reversed in the fifth to seventh embodiments shown in FIGS. 6 to 8, and the generator / motor output member 2 is connected to the sun gear 7 of the planetary gear mechanism 4 and the drive is performed. The force output member 3 is connected to the ring gear 6 of the planetary gear mechanism 4.

In the fourth embodiment shown in FIG. 5, the generator motor output member 2 is connected to the second sun gear 7 'of the planetary gear mechanism 4, and the driving force output member 3 is connected to the sun gear 7 of the planetary gear mechanism 4. However, in the eighth embodiment shown in FIG. 9, the connection relation is reversed, the generator motor output member 2 is connected to the sun gear 7 of the planetary gear mechanism 4, and the driving force output member 3 is connected to the planetary gear mechanism. 4 is connected to the second sun gear 7 '.

According to the fifth to eighth embodiments, the same functions and effects as those of the above-described first to fourth embodiments can be achieved.

Although the embodiments of the present invention have been described in detail, various design changes can be made in the present invention without departing from the gist thereof.

For example, the three elements of the planetary carrier 5, the ring gear 6, and the sun gear 7 of the planetary gear mechanism 4 may be arbitrarily combined with the three elements of the internal combustion engine output member 1, the generator motor output member 2, and the driving force output member 3. Can be connected. Further, a capacitor can be employed instead of the battery 9. The second generator motor G
M _L, GM _R may be a simple electric motor.

[0041]

As described above, according to the first aspect of the present invention, when the internal combustion engine is driven in a state where the internal combustion engine output member is connected to the driving force output member by the clutch, the driving force of the internal combustion engine is directly reduced. Transmission to the driving wheels is enabled, and sudden start performance and rapid acceleration performance are improved.

According to the second aspect of the present invention,
Since the main drive wheels and the generator motor are driven by the internal combustion engine, and the sub-drive wheels are driven by the electric power generated by the generator motor, four-wheel drive can be realized with a simple structure.

According to the third aspect of the present invention,
By driving the left and right sub-drive wheels with the left and right electric motors, respectively, different driving forces can be distributed to the left and right sub-drive wheels to control the yaw moment of the vehicle.

According to the invention described in claim 4,
By restricting the rotation of the internal combustion engine output member by the locking means when driving the generator motor to drive the vehicle backward, it is possible to prevent the internal combustion engine from being reversely driven.

According to the invention described in claim 5,
By using a planetary gear mechanism as the power transmission means,
The transmission and distribution of the driving force among the internal combustion engine output member, the generator motor output member, and the driving force output member can be performed with a simple structure.

[Brief description of the drawings]

FIG. 1 is an overall configuration diagram of a hybrid vehicle.

FIG. 2 is a skeleton diagram of a power unit of the hybrid vehicle.

FIG. 3 is a skeleton diagram of a power unit according to a second embodiment.

FIG. 4 is a skeleton diagram of a power unit according to a third embodiment.

FIG. 5 is a skeleton diagram of a power unit according to a fourth embodiment.

FIG. 6 is a skeleton diagram of a power unit according to a fifth embodiment.

FIG. 7 is a skeleton diagram of a power unit according to a sixth embodiment.

FIG. 8 is a skeleton diagram of a power unit according to a seventh embodiment.

FIG. 9 is a skeleton diagram of a power unit according to an eighth embodiment.

[Explanation of symbols]

REFERENCE SIGNS LIST 1 internal combustion engine output member 2 generator motor output member 3 driving force output member 4 planetary gear mechanism (power transmission means) 5 planetary carrier 6 ring gear 7 sun gear 10 locking means E internal combustion engine GM first generator motor (generator motor) GM _L , GM _R 2nd generator motor (motor) W _FL , W _FR front wheel (drive wheel, main drive wheel) W _RL , W _RR rear wheel (sub drive wheel)

 ────────────────────────────────────────────────── ─── Continuing from the front page (72) Inventor Tetsuhiro Yamamoto 1-4-1 Chuo, Wako-shi, Saitama Pref. Honda Technology Laboratory Co., Ltd. (72) Inventor Atsushi Takahashi 1-4-1 Chuo, Wako-shi, Saitama Inside Honda R & D Co., Ltd. (72) Inventor Yasuo Aoki 1-4-1 Chuo, Wako-shi, Saitama Prefecture Inside Honda R & D Co., Ltd. (72) Naoki Uchiyama 1-4-1 Chuo, Wako-shi, Saitama Pref. Honda R & D Co., Ltd.

Claims (5)

[Claims] 1. An internal combustion engine connected to an internal combustion engine (E)
Power member (1) and power generation connected to a generator motor (GM)
The motor output member (2) and the drive wheels (W_FL, W _FRConnect to
Of the driving force between the driving force output member (3)
Power transmission means (4) for performing
Seki output member (1) or generator motor output member (2)
When the vehicle travels by transmitting the rotation to the driving force output member (3)
An internal combustion engine output member (1) or a driving force output member
The rotation of (3) is transmitted to the generator motor output member (2) and
In an electric hybrid vehicle, an internal combustion engine output member (1) is coupled to a driving force output member (3).
Hive having a clutch (9) that can be engaged
Lid vehicle. 2. An internal combustion engine (E) having main drive wheels (W _FL ,
2. The hybrid vehicle according to claim 1, wherein the sub-drive wheels (W _RL , W _RR ) are driven by the electric power generated by the generator motor (GM) while driving the W _FR ). Wherein the left and right auxiliary drive wheels (W _RL, W _RR) of respectively driving the left and right electric motor (GM _L, GM _R) characterized by comprising a hybrid vehicle according to claim 2. 4. The hybrid vehicle according to claim 1, further comprising a lock (10) for restricting rotation of the internal combustion engine output member (1) during reverse running. 5. The power transmission means (4) is a planetary gear mechanism, and its planetary carrier (5), ring gear (6) and sun gear (7) are composed of the internal combustion engine output member (1) and the generator motor output member. 2. The hybrid vehicle according to claim 1, wherein the hybrid vehicle is connected to one of the driving force output member and the driving force output member. 3.