JP2001010361A - Drive gear for automobile - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enhance power transmission efficiency, and to elevate driving force for rearward traveling while generating electric power, in a drive gear of a hybrid electric vehicle wherein power is transmitted by two kinds of power sources comprising an engine and plural motors using planetary gears. SOLUTION: This drive gear is provided with two sets of planetary gear 10, 20, a fist motor 42 and a second motor 49, the planetary gears 10, 20 have a member A (a first sun gear 12) rotation-controllable to provide deceleration drive, and a member B (a second sun gear 22) rotation-controllable to provide acceleration drive, a first ring gear 14 (drive member) is selectively connectable with a member B via an input shaft 4 or an idler gear (a first gear 32b), a first motor 42 is selectively connectable to an output shaft 6 and the member B, and a second motor 48 is connectable to the member A.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drive device for a so-called hybrid electric vehicle having two types of power sources, an engine (internal combustion engine) and an electric motor. The present invention relates to an automobile drive device having a plurality of motors, which can be transmitted to an output shaft via a motor.

[0002]

2. Description of the Related Art Conventionally, a driving apparatus for a vehicle which can transmit a driving force input from an engine to an output shaft through a planetary gear and has a plurality of motors has been known as an "Automotive Technology Society" The technique described in FIG. 5 on page 17 of "Technology", January 1998 is known.

[0003] In the above conventional example, when the vehicle is driven by the engine, the torque input from the engine is divided by the planetary gears, a part of the torque is mechanically transmitted to the output shaft, and the remaining torque is transmitted. It is configured to generate electric power by torque and drive the output shaft by a motor using the electric power.

[0004]

In the above-mentioned conventional example, since the power generated by a part of the power of the engine is supplied to the motor to transmit the power, that is, the ratio of the so-called electric power transmission is high. Losses generated in the process of transmitting power tend to be large. That is, the power transmission efficiency of an electric route that changes the driving force of the engine to electricity by a generator and is driven again by a motor is generally inferior to mechanical transmission of gears and the like. For this reason, when the vehicle runs in a driving state in which a high load is applied to the engine, the power transmission ratio in the electric route increases, which causes a deterioration in fuel efficiency, and there is a problem that the goodness of the hybrid vehicle is partially impaired.

[0005] Further, since the compressor of the cooling device cannot be operated with the engine stopped, there is a problem that it is difficult to stop idling when the vehicle is stopped for a long time in a hot summer season, and fuel efficiency is impaired. Further, as described above, since the power transmission ratio in the electric route is high, the required motor capacity with respect to the engine output (capacity) is increased, so that there is a problem that the manufacturing cost is increased.

Therefore, the present applicant has made an invention aiming at reducing the power transmission on the electric route to reduce the required motor capacity for the engine output, improving the power transmission efficiency, and improving the fuel efficiency. Nipponhei 10-16
9115, Japanese Patent Application No. 10-183222, Japanese Patent Application No. 10-3
No. 42294 filed. However, there has been a problem that the driving force when the vehicle is traveling backward while generating electric power by the engine is small, as in the case of backward traveling for a long time.

The present invention makes use of the features of the above-mentioned invention filed by the present applicant and increases the driving force when the vehicle moves backward while generating electric power with the engine, as much as the forward movement. The purpose is to facilitate application to heavy vehicles.

A general commercial vehicle has an auxiliary device such as an air compressor for braking, a hydraulic pump for power steering, and a compressor for a cooling system, in addition to an operation of driving the engine to drive the vehicle. Driving equipment called. Furthermore, when used for special applications such as dump trucks, vacuum trucks, and garbage trucks, a hydraulic pump or a vacuum pump may be separately driven.

These are used when the car is stopped,
Some of them are driven during running, but especially when only these accessories are driven while the vehicle is stopped, the engine is in low-load operation with low thermal efficiency, so-called partial load. Therefore, low-load operation only for driving these auxiliary devices deteriorates fuel efficiency and impairs the goodness of the hybrid electric vehicle.

Accordingly, the present invention provides an auxiliary compressor such as a compressor for a cooling system, an air compressor for a brake used in a commercial vehicle, and a hydraulic pump for a power steering even when the engine is stopped for a long time when the vehicle is stopped. When used in special applications such as dump trucks, vacuum trucks, and garbage trucks, as well as machines, hydraulic pumps and vacuum pumps can be easily driven by motors to prevent low-load operation of the engine. The aim is to improve fuel economy.

[0011]

According to a first aspect of the present invention, there is provided a vehicle driving apparatus for driving a vehicle, wherein a driving force input to an input shaft from an engine is controlled by a plurality of planetary gears. A plurality of planetary gears comprising a first planetary gear and a second planetary gear, and the first planetary gear can be rotationally stopped to obtain a reduction drive.
And a driving member, and the second planetary gear has a member B that can be rotationally stopped to obtain speed-up driving.
And a drive member can be connected via an idler gear, and a first motor connectable to the output shaft and the member B, and a second motor connectable to the member A are provided.

According to a second aspect of the present invention, at least one of the gears connecting the member B and the first motor also functions as an idler gear. Features.

According to a third aspect of the present invention, a driving force input to an input shaft from an engine can be transmitted to an output shaft via a plurality of planetary gears. The gear comprises a first planetary gear and a second planetary gear,
The first planetary gear has a member A and a drive member that can be rotationally stopped to obtain a reduced drive, and the second planetary gear has a member B that can be rotationally stopped to obtain an increased speed drive. A first motor connectable to the output shaft while being intermittent to the shaft and connectable to the auxiliary drive shaft;
A member is provided with a second motor connectable to the member A.

[0014]

According to the first aspect of the present invention, the driving force input to the input shaft from the engine is:
A plurality of planetary gears can be transmitted to the output shaft via a plurality of planetary gears, the plurality of planetary gears comprises a first planetary gear and a second planetary gear,
The second planetary gear has a member A and a drive member that can be rotationally stopped to obtain a deceleration drive, and the second planetary gear has a member B that can be rotationally stopped to obtain an increased speed drive. And a first motor connectable to the output shaft and the member B, and a second motor connectable to the member A, so that the member B Drives the driving member in the reverse direction to mechanically transmit the reverse driving force.

Further, in the vehicle driving apparatus according to the present invention, at least one of the gears connecting the member B and the first motor also serves as an idler gear. Therefore, at the time of reverse movement while generating power, at least one of the gears connecting the member B and the first motor drives the drive member in the reverse direction.

According to a third aspect of the present invention, a driving force input to an input shaft from an engine can be transmitted to an output shaft via a plurality of planetary gears. Has a first planetary gear and a second planetary gear, the first planetary gear has a member A and a drive member that can be rotationally stopped to obtain a reduction drive, and the second planetary gear has a speed increase. A first motor that can be connected to the output shaft and a first motor that can be connected to the output shaft, and a member that can be connected to the member A And a second motor, the auxiliary machine such as an air compressor or a hydraulic pump is driven by the engine when the engine is rotating, and the second motor is driven via the first planetary gear when the engine is stopped. Drive That.

[0017]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a skeleton diagram of a main part in a vehicle drive device of the present invention. The engine 2, the input shaft 4 and the output shaft 6 have the same axis, and a first planetary gear 10 is arranged on a first shaft 8 arranged in parallel with these. The first planetary gear 10 includes a first sun gear 12 and a first sun gear 12.
It comprises a ring gear 14, a first carrier 16, and a first pinion 18 pivotally supported by the first carrier 16 and meshing with the first sun gear 12 and the first ring gear 14.

The second planetary gear 20 is provided on the same shaft as the input shaft 4 and the output shaft, and is supported by the second sun gear 22, the second ring gear 24, the second carrier 26, and the second carrier 26. The second pinion 28 is configured to mesh with the second sun gear 22 and the second ring gear 24. The shaft on which the second planetary gear 20 is disposed is referred to as a second shaft 30.

The engine 2 is connected to a second carrier 26 via the input shaft 4, and the second ring gear 24 is connected to the output shaft 6. The second sun gear 22 forms a member B as described later. The second sun gear 22 includes first gears 32a, 3
2b and the third shaft 36 via the first dog clutch 34
And the output shaft 6 is connected to the second gear 38.
a, 38b and the third through the first dog clutch 34
It is selectively connectable with the shaft 36. In the figure, the third shaft 36
And the second gear 38b are connected. The third shaft 36 is connected to the first motor 42 via third gears 40a and 40b.

The input shaft 4 can be selectively connected to the first ring gear 14 via fourth gears 44a and 44b and a second dog clutch 46. In the figure, the input shaft 4 is connected to the first ring gear 14. Is shown. First ring gear 14
Constitutes the driving member of the present invention. First carrier 16
Is connected to the output shaft 6 via the second gears 38c and 38a. The first sun gear 12 is connected to the second motor 48, and constitutes a member A of the present invention as described later. Further, the first ring gear 14 can be selectively connected to the second sun gear 22 via the second dog clutch 46 and the first gears 32c, 32b, 32a. Although the first gears 32b and 32c are illustrated as being separated from each other in the drawing, they are actually meshed. Further, the first ring gear 14 is connected to the accessory drive shaft 52 via fifth gears 50a and 50b.

The first motor 42 and the second motor 48 can switch the rotation direction between forward rotation and reverse rotation, respectively, and have a function as a motor, a function as a generator, and a function as a brake for stopping the rotation. And can be arbitrarily switched by a command from a controller (not shown).

An automobile equipped with the driving device shown in FIG.
Since it has the engine 2 and two types of driving power sources, the first motor 42 and the second motor 48, a so-called hybrid electric vehicle is configured.

Next, the operation of the driving device having the above configuration will be described. In the following description, “forward rotation” refers to rotation in the same direction as the engine 2 or in the direction in which the vehicle is moved forward, or in a direction interlocked therewith, and “reverse rotation” refers to rotation in the opposite direction.

First, start and acceleration by electric power supplied from a battery (not shown) will be described. Normal,
When the car is stopped, the engine 2 is also stopped. In the state shown in FIG. 1, the first motor 42 includes the third gears 40b and 40a, the first dog clutch 34, and the third shaft 3
6, since the first motor 42 is connected to the output shaft 6 via the second gears 38b and 38a, power is supplied from the battery so that the first motor 42 rotates forward, thereby driving the output shaft 6 in the forward direction. Start the car and start accelerating. Thus, the state driven by only the first motor 42 is called a first drive mode.

Next, the operation when the engine 2 is started to further increase the driving force will be described. When the vehicle is stopped or at low speed, in addition to driving by the first motor 42,
The engine 2 can be rotated by energizing the second motor 48. When the speed of the automobile is high, the engine 2 can be rotated by causing the second motor 48 to generate power in addition to the driving by the first motor 42. That is, when a torque acts on the second motor 48, the first ring gear 14 is driven by the reaction force, so that the second dog clutch 46, the fourth gears 44b and 44a, the input shaft 4
, The engine 2 is rotated forward. Here engine 2
When control such as supplying fuel to the engine or connecting an ignition circuit (not shown) is performed, the engine 2 starts.

When the engine 2 starts and starts driving, power transmission is performed as follows. The engine 2 is connected to the first gear via the fourth gears 44 a and 44 b and the second dog clutch 46.
When the ring gear 14 is driven, the first sun gear 12 is driven in the reverse rotation direction by the reaction force thereof while the output shaft 6 is driven to reduce speed via the first carrier 16 and the second gears 38c and 38a. The connected second motor 48 generates power. The generated power is supplied to the first motor 42 via a controller (not shown), and the first motor 4
2 drives the output shaft 6 similarly to the first drive mode.

At this time, the torque transmitted to the output shaft 6 is
The sum of the torque mechanically transmitted by the engine 2 via the first planetary gear 10 and the driving torque of the first motor 42 is obtained. Therefore, the first motor 4
When the power is continuously supplied to the second motor 2, the first motor 42 is driven by the power from the battery and the power generated by the second motor 48, and the power source is the engine 2 and the battery.

Here, when the power supply from the battery is stopped, the first motor 42 is driven only by the power generated by the second motor 48, and the output shaft 6 is mechanically driven via the first planetary gear 10. The power source is only the engine 2 including the torque transmitted to the engine 2. Also, the second motor 4
A part of the power generated by the battery 8 can be used for charging the battery. The state in which the first motor 42 drives the output shaft 6 while the second motor 48 generates power via the first planetary gear 10 in this manner is referred to as a second drive mode.

In the second drive mode, the ratio (speed change ratio) between the rotation speed of the input shaft 4 and the rotation speed of the output shaft 6 is determined by the magnitude of the torque of the engine 2 entering the input shaft 4 and the output shaft 6 driving the automobile. Is automatically determined by the magnitude of the torque (load), the power supplied from the battery to the first motor 42, and the like. Further, the electric power generated by the second motor 48 also changes according to them.

That is, when the speed of the vehicle is low and the torque of the engine 2 is large and the load on the output shaft 6 is large, the input shaft 4
Is significantly higher than the rotation speed of the output shaft 6, and the speed of the vehicle gradually increases, and the load on the output shaft 6 decreases.
Even if the rotation speed of the input shaft 2 is constant, the rotation speed changes steplessly so that the rotation speed of the output shaft 6 increases. At the same time, the rotation speed of the second motor 48 decreases.

Then, when the vehicle speed further increases or the rotational speed of the engine 2 decreases, the rotational speed of the first sun gear 12 together with the second motor 48 decreases, and eventually stops. In order for the first sun gear 12 to stop, it is necessary to supply electric power from the battery to the second motor 48 so as to generate a torque in the forward rotation direction and electrically stop the rotation. Normally, the motor has the characteristic of producing the largest torque when the number of revolutions is zero.
Requires very little power to stop.

When the first sun gear 12 is stopped together with the second motor 48 in this manner, the gear ratio (input shaft rotation speed / output shaft rotation speed) is changed by the number of teeth of the first sun gear 12 with respect to the number of teeth of the first ring gear 14. The ratio of the numbers is α1, the ratio of the number of teeth of the fourth gears 44a, 44b is i4, and the second gears 38c, 38
Assuming that the tooth number ratio of b is i2, i4 × (1 + α1) × i2
, And mechanical power transmission with a fixed reduction ratio.

The first sun gear 12 constitutes the member A of the present invention that enables deceleration driving by stopping rotation, and the state of mechanical power transmission at a fixed reduction ratio is referred to as a third driving mode. In the third drive mode, the second motor 48 stops and thus does not generate power. However, power can be supplied from the battery to the first motor 42 to increase the drive from the engine 2 and, conversely, mechanical deceleration drive can be performed. Meanwhile, the battery can be charged by causing the first motor 42 to generate power.

Next, the transition to the fourth drive mode will be described. In the state of the third drive mode, the second planetary gear 20
Is idling. That is, the second ring gear 24 rotates integrally with the output shaft 6, and the second carrier 26 rotates integrally with the input shaft 4, but no torque acts on the second planetary gear 20.

Here, the ratio of the number of teeth of the second sun gear 22 to the number of teeth of the second ring gear 24 of the second planetary gear 20 is α
By setting the ratio of the number of teeth of the first gears 32a and 32b and the ratio of the number of teeth of the second gears 38a and 38b appropriately to α2, in the third drive mode, the first gear 32b And the third shaft 36 have substantially the same rotational speed.

In this state, the power supply from the battery to the first motor 42 is stopped, and the first dog clutch 34 is moved to the left to connect the third shaft 36 and the first gear 32b. That is, the first motor 1
Since the rotation of the second motor 2 is stopped, power is transmitted from the input shaft 4 to the output shaft 6, but the power supply to the first motor 42 is cut off, so the torque acting on the first dog clutch 34 Is 0, and as described above, the third shaft 36 and the first gear 32b have substantially the same rotational speed, so that the connection relationship can be switched smoothly. As a result, the first motor 42 is connected to the second sun gear 22 and continues to rotate.

In this connection state, when the first motor 42 generates power and supplies power to the second motor 48, the stopped second motor 48 starts driving in the forward rotation direction, and its output torque becomes the first planetary gear. 10 and the second gear 38c, 3
The output shaft 6 is driven via 8b. That is, the first sun gear 12 driven by the second motor 48 drives the second carrier 26 at a reduced speed. At this time, the reaction torque acts on the first ring gear 14. This reaction torque acts on the input shaft 4 via the second dog clutch 46 and the fourth gears 44b, 44a. Therefore, the input torque entering the second carrier 26 from the input shaft 4 becomes smaller than the output torque of the engine 2.

As can be seen from this torque transmission, most of the input from the engine 2 is the first and second planetary gears 10 and 20.
The output shaft 6 is mechanically driven through the
The motor 42 generates electric power, and the electric power causes the second motor 48 to drive the output shaft 6.

Therefore, when there is no power supply from the battery, the power transmitted electrically is only a part of the power that enters the input shaft 4 from the engine 2. As described above, while the first motor 42 is driven by the second sun gear 22 to generate power, the second motor 48 is driven by the first sun gear 12
Is called a fourth drive mode.

The gear ratio in the fourth drive mode also depends on the magnitude of the torque of the engine 2 entering the input shaft 4, the magnitude of the torque (load) of the output shaft 6 driving the automobile, and from the battery to the second motor 48. It is automatically determined by the supplied power. Further, the electric power generated by the first motor 42 also changes according to them.

That is, when the speed of the vehicle is low and the torque of the engine 2 is large and the load on the output shaft 6 is large, the input shaft 4
When the rotation speed of the output shaft 6 is higher than the rotation speed of the output shaft 6 and the speed of the vehicle gradually increases and the load on the output shaft 6 decreases, the rotation speed of the output shaft 6 becomes constant even if the rotation speed of the input shaft 4 is constant. It changes steplessly ascending. And at the same time the first motor 4
The number of rotations of 2 falls.

Then, when the vehicle speed further increases or the rotation speed of the engine 2 decreases, the rotation speed of the second sun gear 22 together with the first motor 42 decreases, and eventually stops. In order to stop the second sun gear 22, power is supplied from the battery to the first motor 42 to electrically stop the rotation.

When the second sun gear 22 stops together with the first motor 42 in this manner, the gear ratio becomes 1 / (1
+ Α2) is a mechanical speed-up drive with a fixed gear ratio.
The second sun gear 22 constitutes the member B of the present invention that enables speed-up driving at a fixed speed ratio by stopping rotation, and a state in which the speed increasing drive is performed mechanically is referred to as a fifth drive mode.

Even in the fifth drive mode, the first motor 42 is stopped and thus does not generate power. However, by supplying power to the second motor 48 from the battery, it is possible to increase the drive from the engine 2 and conversely. It is also possible to charge the battery by causing the second motor 48 to generate power while driving mechanically at an increased speed.

As described above, from the start of the vehicle at the vehicle speed 0 to the fifth drive mode, the gear ratio continuously changes continuously including two fixed values.

Next, when gradually reducing the speed of the automobile,
And the case of braking will be described. In traveling at high speed in the third drive mode to the fifth drive mode,
The fuel supply to the engine 2 is cut off, and the relationship between the power generation and the drive of each of the motors 42 and 48 in each of the above-described drive modes is reversed, so that the amount of power generation is controlled to perform braking and charge the battery. At a low speed, the engine 2 is stopped with the same connection relationship as in the first drive mode shown in FIG.

Therefore, the first motor 42 and the second motor 42
By appropriately controlling the amount of power generated by the motor 48, moderate deceleration and braking are performed, and a part of the kinetic energy of a car that was conventionally discarded by converting it to heat with a friction brake is converted to electricity and stored in a battery. So-called energy regeneration can be performed. The electric power stored in the battery during energy regeneration is used at the time of accelerating the vehicle next time, thereby obtaining the effect of reducing the fuel consumption of the vehicle.

Next, a case where the vehicle is moved backward will be described. In the case of reverse, the second dog clutch 46 is moved to the right while the first dog clutch 34 remains in FIG.
The connection between the first ring gear 14 and the fourth gear 44b is released, and the first ring gear 14 and the first gear 32c are connected. When the engine 2 is stopped, reverse travel supplies power to the first motor 42 in the same manner as in the forward first drive mode,
By performing reverse rotation, acceleration can be performed from the start.

Next, with the engine 2 rotating,
A case where the vehicle travels backward while generating power will be described. In this case, since the second sun gear 22 and the first ring gear 14 are connected via the three gears of the first gears 32a, 32b, and 32c, the first ring gear 14 is moved in the forward second drive mode by the engine 2 Are driven in a rotation direction opposite to the direction in which they were driven.

That is, the torque that has entered the second carrier 26 from the engine 2 via the input shaft 4 is applied to the second planetary gear 2
0, the output shaft 6 is partially driven from the second ring gear 24 in the forward direction, and the remaining portion is firstly driven from the second sun gear 22 via the first gears 32a, 32b, 32c.
The ring gear 14 is driven in the reverse rotation direction. Normally, the rotation of the second sun gear 22 is reversely transmitted to the first ring gear 14 via an idler gear.
The gear 32b performs the function of an idler gear during reverse travel.

Therefore, in the first planetary gear 10, the first ring gear 14 drives the first carrier 16 in the reverse rotation and reduction, and the first sun gear 12 rotates forward by the reaction force to generate electric power. The generated power is supplied to the first motor 42 via the controller. Therefore, the output shaft 6 is connected to the second ring gear 24
From the first carrier 1
6 and the first motor 42 are driven with a torque in the reverse rotation direction that is superior to that of the second motor 6 and the first motor 42, so that the total driving force can be substantially the same as that of the forward second driving mode.

Next, the operation of the accessory drive shaft 52 will be described.
The accessory drive shaft 52 drives accessories such as an air compressor for a brake, a hydraulic pump for power steering, and a compressor of a cooling device (not shown). In the state shown in FIG. 1, the second dog clutch 46 is on the left side, and the accessory drive shaft 52 is connected to the fourth gears 44a, 44b,
Second dog clutch 46 and fifth gears 50a, 50b
And the engine 2 via the. Therefore, during normal traveling, the accessory drive shaft 52 is driven by the engine 2.

In general, there is a possibility that the engine 2 will be stopped for a long time, especially when the vehicle is stopped. In this case, the second dog clutch 46 is set to a neutral position that is not connected to any of the fourth gear 44b and the first gear 32c, and the second motor 48 is rotated in the reverse direction. As a result, the first ring gear 14 rotates forward, and the accessory drive shaft 52 is driven in the same rotational direction as when driven by the engine 2.

At this time, since a reverse torque acts on the first carrier 16, a parking brake or a parking lock mechanism (not shown) is actuated, or the first motor 42 exerts a forward torque so that the automobile is driven. To prevent backward movement. In this way, even when the engine 2 is stopped while the vehicle is stopped, the auxiliary machines can be driven by the second motor 48. The accessory drive shaft 52 can also drive a hydraulic pump, a vacuum pump, and the like in automobiles that perform special operations such as a dump truck, a vacuum truck, and a garbage truck, in addition to general accessories.

As described above, in the embodiment of FIG. 1, the members A, B and the output shaft 6, the first and second motors 42, By selecting the various driving modes from the first driving mode to the fifth driving mode by controlling the connection relationship with the first driving mode and the power generation / driving / stopping of the first and second motors 42 and 48, the vehicle is controlled. You can run.

In particular, the speed can be changed steplessly from the start at vehicle speed 0 to the fifth drive mode, and mechanical power transmission at two fixed speed ratios of deceleration and speed increase is possible, as well as a long time. In the drive mode in which the vehicle travels while generating power by the reverse drive, the same driving force as in the forward drive can be obtained, and even when the vehicle is stopped for a long time, the auxiliary equipment can be driven while the engine 2 is stopped. Problems in application can be solved.

FIG. 2 is a skeleton diagram showing another embodiment of the vehicle drive device of the present invention. First, a description will be given focusing on differences from the embodiment shown in FIG. The input shaft 4 is connected to only the first carrier 16. The connection relationship between the second planetary gear 20 and the output shaft 6 and the third shaft 36 and the connection relationship between the second sun gear 22 and the third shaft 36 are the same as those in the embodiment shown in FIG. Reference numeral 42 is directly connected to the third shaft 36. The second sun gear 22 constitutes a member B of the present invention that enables speed-up driving by stopping rotation.

The first ring gear 14 of the first planetary gear 10 includes the first gears 32 a and 32 c and the second dog clutch 46.
Can be selectively connected to the second sun gear 22 through the first gears 32a, 32b, the third gears 40a,
0b and the second dog clutch 46 can also be selectively connected to the second sun gear 22. First sun gear 12
Constitutes a member A of the present invention that enables deceleration drive by stopping rotation.

In the figure, the third gears 40a and 40b are drawn apart, but they are meshed. In this case, by moving the second dog clutch 46 to the left at the time of reverse travel, the rotation of the first sun gear 12 can be reversed and transmitted to the first ring gear 14. In the embodiment shown in FIG. 2, the first gear 32b and the third gear 40a function as idler gears when the vehicle moves backward.

The first sun gear 12 constitutes the member A and is connected to the second motor 48. The first motor 42 can be selectively connected to the second sun gear 22 and the output shaft 6 constituting the member B. It is.

As described above, the connection relationship between the members A, B and the output shaft 6 and the first and second motors 42 and 48 is different from the embodiment shown in FIG. Is the same. In addition, the second sun gear 22 during reverse travel
(Member B) and first ring gear 14 (drive member)
The same applies to the connection relationship in which the first gear 32b and the third gear 40a (idler gear) are interposed between the first gear 32b and the third gear 40a.

Although the detailed description is omitted, the operation in the embodiment of FIG. 2 is the same as that of the embodiment shown in FIG. Is possible, and mechanical power transmission with two fixed speed ratios of deceleration and speedup is possible, so that the power transmission efficiency can be increased particularly in the fourth drive mode that is frequently used in steady running. At the same time, it is possible to make the driving force substantially the same as the forward driving force in the backward movement while generating power.

As described above, in any of the embodiments of the present invention, stepless speed change is possible, and mechanical power transmission at two fixed speed ratios of deceleration and speed increase is achieved. As a result, the power transmission efficiency is generally higher, and the member B and the driving member can be connected via idler gears. can do. In each of the embodiments shown in FIGS. 1 and 2, some of the gears used for forward traveling are also used as idler gears for reverse travel. However, similar effects can be obtained by providing idler gears exclusively for reverse travel. Needless to say,

Further, in the embodiment shown in FIG. 1, since the auxiliary equipment can be driven by the motor even when the engine is stopped when the vehicle is stopped for a long time, especially when applied to a commercial vehicle. The advantages of a hybrid car can be demonstrated.

Based on the general knowledge of those skilled in the art, the vehicle drive device of the present invention can be configured such that each shaft is arranged so as to be compact as a whole, and a multi-plate clutch is provided instead of a dog clutch. The present invention can be implemented in a modified or improved mode.

[0066]

As described above, according to the vehicle drive device of the present invention, the following effects can be obtained. (1) According to the vehicle drive device of the present invention described in claim 1, the driving force input from the engine to the input shaft can be transmitted to the output shaft via the plurality of planetary gears, and the plurality of planetary gears can be transmitted. Has a first planetary gear and a second planetary gear, the first planetary gear has a member A and a drive member that can be rotationally stopped to obtain a reduction drive, and the second planetary gear has a speed increase drive. A member B that can be rotationally stopped so that the member B can be connected to the driving member via an idler gear, and can be connected to a member A and a first motor that can be connected to the output shaft and the member B. And the second motor, the member B reversely drives the driving member in reverse while generating power to mechanically transmit the reverse driving force, and together with the reverse driving by the first motor, almost the same driving force as forward movement To Obtainable.

(2) According to the vehicle driving apparatus of the present invention, at least one of the gears connecting the member B and the first motor also serves as an idler gear. Therefore, it is possible to secure the reverse driving force while generating electric power with fewer gears than in the case where a dedicated idler gear is provided, and it is possible to reduce the manufacturing cost.

(3) According to the third aspect of the present invention, the driving force input from the engine to the input shaft can be transmitted to the output shaft via the plurality of planetary gears. Has a first planetary gear and a second planetary gear, the first planetary gear has a member A and a drive member that can be rotationally stopped to obtain a reduction drive, and the second planetary gear has a speed increase. A first motor that can be connected to the output shaft and a first motor that can be connected to the output shaft, and a member that can be connected to the member A The second motor drives the auxiliary equipment via the first planetary gear and the auxiliary drive shaft in a state where the engine is stopped, so that the engine can be driven for a long time while the engine is stopped. Avoid fuel and improve fuel economy be able to.

[Brief description of the drawings]

FIG. 1 is a skeleton diagram of a vehicle drive device of the present invention.

FIG. 2 is a skeleton diagram of another embodiment of the vehicle drive device of the present invention.

[Explanation of symbols]

 2: Engine 4: Input shaft 6: Output shaft 8: First shaft 10: First planetary gear 12: First sun gear 14: First ring gear 16: First carrier 18: First pinion 20: Second planetary gear 22: 2nd sun gear 24: 2nd ring gear 26: 2nd carrier 28: 2nd pinion 30: 2nd shaft 32: 1st gear 34: 1st dog clutch 36: 3rd shaft 38: 2nd gear 40: 3rd gear 42 : 1st motor 44: 4th gear 46: 2nd dog clutch 48: 2nd motor 50: 5th gear 52: accessory drive shaft

Claims (3)

[Claims] 1. A driving force input from an engine to an input shaft can be transmitted to an output shaft via a plurality of planetary gears, wherein the plurality of planetary gears include a first planetary gear and a second planetary gear. The first planetary gear has a member A and a drive member that can be rotationally stopped to obtain a reduced speed drive, and the second planetary gear has a member B that can be rotationally stopped to obtain an increased speed drive.
A first motor connectable to the output shaft and the member B, and a second motor connectable to the member A while allowing the member B and the drive member to be connected via an idler gear. And a driving device for an automobile. 2. The vehicle drive device according to claim 1, wherein at least one of the gears connecting the member B and the first motor also serves as the idler gear. . 3. A driving force input from an engine to an input shaft can be transmitted to an output shaft via a plurality of planetary gears, wherein the plurality of planetary gears include a first planetary gear and a second planetary gear. The first planetary gear has a member A and a drive member that can be rotationally stopped to obtain a reduced speed drive, and the second planetary gear has a member B that can be rotationally stopped to obtain an increased speed drive.
A first motor connectable to the output shaft, and a second motor connectable to the member A, wherein the drive member is connectable to the input shaft and connectable to an accessory drive shaft. An automotive drive device, comprising: