JP2994507B2 - Electric traveling car - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric vehicle which travels by transmitting the driving force of a traveling electric motor to driving wheels via a power transmission mechanism having a transmission and a starting clutch.

[0002]

2. Description of the Related Art In electric vehicles such as electric vehicles,
As a power transmission mechanism for transmitting the driving force of the traveling electric motor to the driving wheels, one having a transmission and one having a starting clutch, as in the case of an engine vehicle, are conventionally known.

[0003] On the other hand, in particular, in an electric vehicle using electric energy stored in a battery as an energy source such as a motor for traveling, in order to extend the continuous traveling distance, a range in which traveling is not hindered. Therefore, it is desired to reduce the power consumption of the battery by the driving motor or the like as much as possible.

For this reason, in an electric vehicle having a transmission as a power transmission mechanism, for example, the transmission is
Along with the driving means for performing the shift operation and the like, it is possible to reduce the load on the traveling electric motor as a small and lightweight one, and efficiently transmit the driving force of the traveling electric motor to the driving wheel side. It is desired to use a transmission capable of performing accurate and detailed operation control according to various traveling conditions.

[0005] In addition, for example, even in an electric vehicle having a starting clutch, the starting clutch is made small and light in weight together with driving means for performing the connection and disconnection to reduce the load on the traveling motor. , The driving force of the traveling motor can be smoothly transmitted to the driving wheel side, and further,
It is desired to use a starting clutch that can perform precise and precise operation control according to various running conditions.

In this case, the transmission used in this type of electric vehicle is, similarly to an engine vehicle, a transmission using a torque converter, a transmission using a transmission gear, or a pulley / belt type continuously variable transmission. (Hereinafter referred to as CVT) and the like, but in particular, in the case of an electric vehicle, in consideration of the above-described points, a relatively light-weight and small-sized structure can be provided, and a stepless speed change can be performed. CVT that can perform the operation and relatively easily perform the speed change operation and the adjustment of the power transmission capacity.
It is preferable to use

As is well known, the CVT is obtained by winding a V-belt around a driving pulley and a driven pulley having a variable effective diameter, and the basic configuration shown in FIG. 9 is generally known. .

That is, as shown in FIG.
In, a drive pulley b is attached to an input shaft a to which a driving force is applied from a power source such as a traveling motor,
A driven pulley d is attached to an output shaft c to which power is to be transmitted from the input shaft, and a V-belt e is wound around these pulleys b and d. In this case, the respective pulleys b and d are rotatably mounted on the input shaft a and the output shaft c, and the fixed pulley halves b ₁ and d ₁ are rotatably mounted on the input shaft a and the output shaft c, respectively. The movable pulley half b is supported by the movable pulley half b ₁ and d ₁ so as to be able to approach and separate from each other.
₂ , d ₂ , and the V belt e is composed of fixed pulley halves b ₁ , d ₁ and movable pulley halves b ₂ , d of each pulley b, d.
It is wound around a V-shaped groove formed between the _two . In this case, the movable pulley half d ₂ of the driven pulley d is biased toward the stationary pulley half d _1, for example, by a spring f.

With this configuration, in this CVT, the rotation of the input shaft a is transmitted to the output shaft c via the driving pulley b, the V-belt e, and the driven pulley d in this order.
For example, gradually approaching the movable pulley half b ₂ of the drive pulley b to the stationary pulley half b _1, V belts e in the drive pulley b is guided by the groove between pulley halves b _1, b ₂ gradually While the driven pulley d
V belt e gradually reduced in diameter in the driven pulley d while gradually separated from the movable pulley half d ₂ is stationary pulley half d ₁ of, whereby, continuously variable between the input shaft a and the output shaft c Is performed. At this time, by adjusting the contact force of the driven pulley d and the V-belt e example by appropriately adjusting the amount of movement of the movable pulley half d ₂ of the driven pulley d,
The power transmission capacity of the CVT is adjustable.

Therefore, the basic structure of the CVT can be made relatively light and small by the driving pulleys b and d and the V belt e, and the movable pulley half b _{2 of} each pulley b and d. , stationary pulley half of d ₂ b _1, d ₁
It is possible to perform appropriate shifting operation and power transmission capacity adjustment in accordance with running conditions and the like simply by moving the vehicle toward and away from the vehicle, which is suitable for a transmission of an electric vehicle.

By the way, in such a CVT,
In order to perform the shift operation or to transmit the power
In order to adjust the capacity, the movable pulley half of each pulley b, d
Body b _Two, D_TwoThe fixed pulley half b₁, D₁Approaching and leaving
Is required, and as this driving means,
As is well known, so-called centrifugal weight governor structure and torque
Mechanically configured with a cam structure, etc.
Those that generate driving force by body pressure or electromagnetic force
That generate driving force by using an electromagnetic actuator
Is generally known.

However, when the above-described driving means is used as the driving means of the CVT, the following inconvenience is caused particularly in an electric vehicle.

That is, in an electric vehicle, due to its nature, regenerative braking or the like, in which a running electric motor is operated as a generator to charge a battery during coasting on a downhill or the like due to constant speed running, rapid acceleration, or the like. In addition to the above-mentioned various driving conditions, as described above, it is desirable to reduce the load on the driving motor as much as possible in order to reduce the power consumption of the battery. However, it is necessary to appropriately control the operation of the CVT in accordance with various driving conditions, and to reduce the weight and size of the CVT and to further reduce the power consumption.

However, in the CVT driving means which is mechanically constituted by a centrifugal weight governor structure, a torque cam structure, or the like, the power consumption is not required.
As described above, the driving force for operating the CVT is uniquely generated according to the rotation speed of the driving pulley and the driven pulley, and therefore, an appropriate shifting operation is performed according to various running conditions of the electric vehicle. It is difficult to achieve this, and in order to secure a sufficient power transmission capacity that can cope with various driving conditions, it is generally necessary to increase the size of the centrifugal weight governor structure and the like. It hinders.

In addition, C which generates a driving force by fluid pressure
In the VT driving means, although the speed change operation of the CVT and the adjustment of the power transmission capacity can be appropriately performed according to various traveling conditions, various configurations related to fluids such as a fluid pressure circuit and a pump. Are required, the configuration of the driving means of the CVT becomes large, and the power consumption by the motor for driving the pump and the like increases.

Further, in the CVT driving means for generating a driving force by an electromagnetic force or an electromagnetic actuator, similarly to the fluid pressure, the CVT shifting operation and the adjustment of the power transmission capacity are performed according to various traveling conditions. However, when the power consumption of the battery by the driving means increases and the capacity of the battery decreases, the operation of the CVT may become uncertain.

On the other hand, a start clutch used in this type of electric vehicle usually has a plurality of clutch plates between a clutch outer and a clutch inner, as in an engine vehicle, and connects each clutch plate to each other. A start clutch is generally used in which a clutch outer and a clutch inner are connected by being brought into pressure contact with each other.

Also, in such a starting clutch, as a well-known driving means for applying a driving force to the clutch plate in order to make the connection, a so-called centrifugal weight governor structure, a torque cam structure and the like are used. A configuration, a configuration in which a driving force is generated by a fluid pressure such as a hydraulic pressure, and a configuration in which a driving force is generated by an electromagnetic force or an electromagnetic actuator are generally known.

However, when the above-described driving means is used as the driving means for the starting clutch, there are the following disadvantages particularly in electric vehicles.

That is, the driving means of the starting clutch of the electric vehicle also starts appropriately and smoothly in accordance with various running conditions such as normal starting, sudden acceleration starting, and regenerative braking, as in the case of the CVT described above. It is required that the clutch can be disengaged, and that the weight and size of the clutch be reduced, and that the power consumption be reduced.

However, in the drive means of the starting clutch mechanically constituted by a centrifugal weight governor structure, a torque cam structure, or the like, as in the case of the above-mentioned CVT, an appropriate driving means is provided in accordance with various running conditions of the electric vehicle. It is difficult to perform the switching operation, and when sudden acceleration starts,
In order to perform quick connection, generally, the centrifugal weight governor structure and the like must be increased in size, which hinders weight reduction.

Also, in the driving means of the starting clutch which generates a driving force by the fluid pressure, as in the case of the above-mentioned CVT, various structures related to fluid such as a fluid pressure circuit and a pump are required. As a result, the configuration of the driving means of the starting clutch becomes large, and the power consumption by the motor for driving the pump and the like increases.

Furthermore, in the starting clutch driving means for generating a driving force by an electromagnetic force or an electromagnetic actuator, as in the case of the CVT described above, the power consumption of the battery by the driving means is increased, and the battery power is increased. When the capacity is reduced, the operation of the starting clutch may be uncertain.

[0024]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances and has solved the above-mentioned disadvantages. It is an object of the present invention to provide an electric traveling vehicle capable of appropriately controlling power, transmission power, and the like according to various traveling conditions, and obtaining excellent traveling performance.

The present invention also relates to an electric vehicle which travels by transmitting the driving force of a traveling electric motor to a driving wheel via a starting clutch. Can be properly controlled,
An object of the present invention is to provide an electric traveling vehicle that can obtain excellent traveling performance.

[0026]

According to the present invention, there is provided an electric vehicle comprising:
According to an aspect of the present invention, a drive-side fixed pulley half rotatably mounted integrally with an input shaft to which a driving force of a traveling motor is transmitted, and a rotatably supported bearing on the input shaft are provided. And a drive pulley composed of a drive-side movable pulley half provided so as to be able to approach / separate from the drive-side fixed pulley half, and an output shaft for transmitting a driving force to the drive wheels. And a driven movable half pulley half rotatably supported by the output shaft and provided so as to be able to approach / separate from the driven half fixed pulley. A driven pulley, and an endless strip wound between the two pulleys for transmitting power from the driving pulley to the driven pulley, wherein a movable pulley half of one of the pulleys is a fixed pulley half Approach and depart from By moving the movable pulley half of the other pulley away from and approaching the fixed pulley half, the diameter of the endless strip in both pulleys is steplessly changed to change the speed ratio between the input shaft and the output shaft. In an electric vehicle equipped with a continuously variable transmission whose power transmission capacity is adjustable, a driving means for moving the movable pulley half of each pulley toward and away from the fixed pulley half, a mechanical drive means give rise mechanically in conjunction with the rotation of the pulley, also composed of electrically driven means occupying electrically rise to driving force in accordance with the driving force of the mechanical drive means
It is.

[0027] Then, the mechanical drive means, said during shifting of the continuously variable transmission, driving to close the movable pulley half body fixed pulley half of the drive pulley according to the rotational speed of the input shaft In addition to applying force to the movable pulley half, the shift operation of the continuously variable transmission is performed from the lowest speed ratio to the highest speed ratio when the accelerator operation amount of the electric traveling vehicle is large. comprises means for imparting to the movable pulley half of the drive pulley in the high-speed rotation region above the predetermined rotation speed of said electric motor for running the driving force required, the electrical drive means, when the operation amount of the accelerator is small said machine driving force required from the lowest speed gear ratio to the gear shift operation to occupy performed at low speed rotation region of the following predetermined rotational speed of the inorganic variable transmission the electric motor for running the shift operation of the to maximum speed gear ratio Drive Together with stages of driving force, characterized in it to contain means to grant the movable pulley half of the drive pulley.

Furthermore, prior Symbol electrical drive means, in a high-speed rotation area of at least the electric motor for running the shifting operation of the continuously variable transmission by the driving force of said mechanical drive means during reverse travel of the electric vehicle is performed to grant the direction of the driving force of separating the movable pulley halves of the drive pulley to maintain the speed ratio in the speed ratio of a predetermined low speed side from the stationary pulley half of the inorganic phase transmission to the movable pulley half Means .

The mechanical drive means adjusts the contact force between the driven pulley and the endless strip according to the torque applied to the driven pulley when the output torque of the traveling motor is small. includes means for adjusting the power transmission capacity of the continuously variable transmission, the electric drive means, said increasing the contact force between the driven pulley and an endless strip material when the output torque of the electric motor for running is large stepless applied to the movable pulley half of the drive force to close the movable pulley halves of the rather increase of Serube the power transmission capacity of the transmission driven pulley to the fixed pulley half body together with the driving force of said mechanical drive means You
And wherein a call, including the means that.

According to a second aspect of the electric traveling vehicle of the present invention , in order to achieve the above-mentioned object, a starting clutch having a clutch plate for connecting and disconnecting a power transmission path from a traveling electric motor to driving wheels is provided. A driving means for engaging the clutch plate to connect the starting clutch, wherein the driving means mechanically generates the driving force in conjunction with the rotation of the driving electric motor. It is constituted by a driving means and an electric driving means for electrically generating a driving force together with the driving force of the mechanical driving means.

[0031] Then, the mechanical drive means, the drive force for connecting the starting clutch according to the rotational speed of the front Symbol driving motor as well as applied to the clutch plate, the rotational speed of the traveling motor is in a predetermined the driving force to which the connection state of the starting clutch can transmit the maximum output torque of the electric motor for running when it reaches the first rotation speed includes means for imparting to said clutch plate, said electrical drive means, the when accelerator operation amount of the electric vehicle is large, the driving force which the starting clutch at a low rotational speed than a predetermined first rotation speed of the moving electric motor is connected state capable of transmitting the maximum output torque of the electric motor for running And a means for applying to the clutch plate together with the driving force of the mechanical driving means.

Furthermore, said mechanical drive means, prior Symbol driving motor a predetermined rotational speed is lower than the first rotational speed of the
A driving force allowed to initiate connection of the starting clutch when it reaches the second rotational speed of the means for applying to said clutch plate, said electrical drive means, during regenerative braking of the electric motor for running, for the running the rotational speed of the motor of the predetermined
The driving force also becomes less twice rotation speed to maintain the connection of the starting clutch, characterized in the this <br/> including means to grant to the clutch plate.

[0033]

According to the electric traveling vehicle of the present invention having the above-described continuously variable transmission, basically, the shifting operation of the continuously variable transmission is performed by the driving force of the mechanical driving means. With the aid of the electric drive means, the power transmission capacity and the like of the continuously variable transmission are adjusted.

Therefore, by appropriately assisting the driving force of the mechanical drive means by the electric drive means, the speed change operation and power transmission capacity of the continuously variable transmission can be rapidly accelerated, and the speed of the motor can be increased. It is possible to appropriately control according to various running conditions such as during regenerative braking, and it is possible to improve the power transmission capacity as necessary, while the driving force by the electric driving means is required. It is possible to reduce the power consumption by using it accordingly.

In this case, the mechanical driving means applies a driving force corresponding to the rotation speed of the input shaft to the movable pulley half of the driving pulley, and when the operation amount of the accelerator is large, the traveling electric motor because comprising means occupying perform shift operation of the continuously variable transmission at a high speed rotation region of the running
The electric driving means is operated in the low speed rotation region of the electric motor , and the driving force of the electric driving means and the driving force of the mechanical driving means are applied to the movable pulley half of the driving pulley together . As a result, when the accelerator operation amount is large, it is possible to perform the shift operation of the continuously variable transmission in the low speed rotation region of the traveling electric motor.

The mechanical driving means can be constituted by, for example, a known centrifugal weight governor structure.

[0037] In addition, in the time of the reverse of the electric vehicle,
In the high-speed rotation region of the traveling motor, the electric driving means applies a driving force to the movable pulley half in a direction of separating the movable pulley half of the drive pulley from the fixed pulley half. The reverse traveling of the electric traveling vehicle can be performed while maintaining the speed ratio of the step transmission at a predetermined low speed side speed ratio.

Incidentally, such a mechanical driving means can be constituted by, for example, a known centrifugal weight governor structure.

Further, the mechanical driving means adjusts the contact force between the driven pulley and the endless strip according to the torque applied to the driven pulley when the output torque of the traveling motor is small, and the mechanical driving means adjusts the contact force. When the power transmission capacity of the step transmission is adjusted, the electric drive means is operated when the output torque of the traveling electric motor is large, and the driving force of the electric drive means is combined with the drive force of the mechanical drive means. By providing the driven pulley to the movable pulley half, the contact force between the driven pulley and the endless strip can be increased, and the power transmission capacity of the continuously variable transmission can be increased.

Incidentally, such a mechanical driving means can be constituted by, for example, a known torque cam structure.

Next, according to the electric traveling vehicle of the present invention provided with the starting clutch, the connection operation of the starting clutch is basically performed by the driving force of the mechanical driving means, and the driving force is applied to the electric power. The connection timing of the starting clutch is adjusted by combining the driving forces of the dynamic driving means.

Accordingly, by appropriately assisting the driving force of the mechanical driving means by the electric driving means, the connecting operation of the starting clutch can be performed under various driving conditions such as rapid acceleration starting and regenerative braking of the driving electric motor. While it becomes possible to appropriately control according to, as an auxiliary that uses the driving force by the electric driving means as needed,
This makes it possible to reduce power consumption.

In this case, the mechanical driving means applies a driving force for connecting the starting clutch to the clutch plate in accordance with the rotational speed of the electric motor for traveling, and the rotational speed of the electric motor for traveling becomes a predetermined value . because comprising means you the starting clutch when it reaches the first rotation speed connection state capable of transmitting the maximum output torque of the electric motor for running, the accelerator operation amount of the electric vehicle is rather large, traveling Motor rotation
When the speed is lower than the first rotation speed , the electric driving means is operated to apply the driving force of the electric driving means and the driving force of the mechanical driving means to the clutch plate . This
Therefore, when the accelerator operation amount is large, at a rotation speed lower than the first rotation speed of the traveling electric motor ,
The starting clutch can be brought into a connected state capable of transmitting the maximum output torque of the traveling motor.

Incidentally, such a mechanical driving means can be constituted by, for example, a known centrifugal weight governor structure.

Further, the mechanical drive means, before Symbol traveling motor rotation speed is predetermined lower than the first rotational speed of the
When the means for starting the connection of the starting clutch when the second rotation speed is reached, the electric drive is performed at a rotation speed equal to or lower than the second rotation speed of the traveling motor during regenerative braking of the traveling electric motor. By applying the driving force to the clutch plate by the means, the connected state of the starting clutch can be maintained and the driving motor can be driven as a generator until immediately before the driving motor stops. .

The mechanical driving means can be constituted by a known centrifugal weight governor structure, for example.

[0047]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An example of an electric vehicle according to the present invention will be described with reference to FIGS. FIG. 1 is a schematic explanatory view for explaining a configuration of a main part of the electric traveling vehicle, FIGS. 2 to 5 are diagrams for explaining the operation thereof, and FIGS. 6 to 8 are for explaining the operation thereof. It is a flowchart of FIG.

In FIG. 1, 1 is a running motor, 2 is a CVT which is a continuously variable transmission, 3 is a starting clutch, 4 is a differential gear mechanism, 5 and 5 are driving wheels, 6 is a running motor 1 and CVT 2. And an operation controller for controlling the operation of the starting clutch 3. This electric traveling vehicle uses the driving force of the traveling electric motor 1 as CV.
The vehicle travels by transmitting it to drive wheels 5 and 5 via T2, start clutch 3 and differential gear mechanism 4 in that order.

In this case, the traveling motor 1 uses a battery 7 mounted on a vehicle body (not shown) as a power source.
It is electrically connected to the battery 7 via a drive circuit 8 controlled by the controller 6. In this electric traveling vehicle, the forward running and the reverse running are performed by the forward rotation and the reverse rotation of the electric motor 1, respectively.
Is operated as a generator to perform regenerative braking. When the electric motor 1 is running, the driving circuit 8
Is supplied to the electric motor 1 as needed, and the battery 7 is charged via the drive circuit 8 from the electric motor 1 as a generator during regenerative braking.

The CVT 2 is a drive shaft 1a of the traveling motor 1.
An input shaft 9 concentrically connected to the input shaft 9, a driving pulley 10 rotatably supported by the input shaft 9, a hollow output shaft 11 provided in parallel with the input shaft 9, and a rotation around the output shaft 11. A driven pulley 12 movably supported, and both pulleys 10 and 12;
The drive pulley 10 is attached to and fixed to the input shaft 9 in the same manner as the CVT shown in FIG. Approaching this fixed pulley half 10a.
The driven pulley 12 is composed of a fixed pulley half 12 a inserted and fixed to the output shaft 11, and a fixed pulley half 12 a inserted and fixed to the output shaft 11. A movable pulley half 12b supported on the output shaft 11 so as to be able to approach and separate from the body 12a.

The CVT 2 is connected to the traveling motor 1
Is transmitted from the drive shaft 1 a to the output shaft 11 via the input shaft 9, the drive pulley 10, the V-belt 13 and the driven pulley 12 in this order. At this time, the movable pulley half 10 b of the drive pulley 10 is appropriately By moving the movable pulley half 12b of the driven pulley 12 toward and away from the fixed pulley half 12a by following and moving toward and away from the fixed pulley half 10a, the driving force of the traveling motor 1 is increased. Is transmitted to the output shaft 11 after shifting. Further, the CVT 2 adjusts the amount of movement of the movable pulley half 12b relative to the fixed pulley half 12a as appropriate to adjust the contact force between the driven pulley 12 and the V-belt 13, so that the pulley 10 and the pulley The power transmission capacity is adjustable.

In this case, the CVT 2 uses the movable pulley halves 10b and 12b for the respective pulleys 10 and 12 as the fixed pulley halves 10a and 12a, respectively, as means for performing the shifting operation and the adjustment of the power transmission capacity. The movable pulley halves 10b, 12b
, And each of the driving means 14 and 15 is provided with mechanical driving means 16 and 17 for mechanically generating the driving force, respectively, and It is constituted by electric driving means 18 and 19 for electrically generating a driving force corresponding thereto.

More specifically, the mechanical driving means 16 of the driving means 14 applies a driving force for bringing the movable pulley half 10b closer to the fixed pulley half 10a in accordance with the rotation speed of the input shaft 9, for example. The mechanical drive means 17 of the drive means 15 is constituted by a centrifugal weight governor structure 20 applied to the half body 10b, for example, the spring 2 for urging the movable pulley half 12b toward the fixed pulley half 12a.
1 and a torque cam structure 2 for applying a driving force corresponding to the torque transmitted to the driven pulley 12 to the movable pulley half 12b.
2 is constituted.

Each of the electric driving means 18 and 19 comprises, for example, electromagnetic actuators 23 and 24 which are controlled by the controller 6 using the battery 7 as a power source.

In this case, the centrifugal weight governor structure 2
Numeral 0 is slidably received in the radial direction of the input shaft 9 between the movable pulley half 10b and the receiving plate 25 inserted and fixed to the input shaft 9 so as to face the movable pulley half 10b. This is a known type including a plurality of spherical centrifugal weights 26 rotatably provided integrally with the input shaft 9, and detailed description thereof is omitted.
Is slid in the centrifugal direction while slidingly contacting the receiving plate 25 and the movable pulley half 10b by centrifugal force, thereby generating a driving force for bringing the movable pulley half 10b closer to the fixed pulley half 10a.

The torque cam structure 22 includes a cam groove 28 formed on the cylindrical portion 27 of the movable pulley half 12 b externally inserted on the output shaft 11 so as to be inclined with respect to its axis. It is a well-known one comprising a pin 29 protruded and engaged with the cam groove 28, and a detailed description thereof is omitted, but the pin 2 is driven in accordance with the torque transmitted to the driven pulley 12.
The driving force is applied to the movable pulley half 12b by the guide 9 moving along the cam groove 28. In this case, in the torque cam structure 22, for example, when the traveling electric motor 1 is in the forward rotation mode (when the electric traveling vehicle is moving forward),
The cam groove 28 is inclined in such a direction as to generate a driving force for bringing the movable pulley half 12b closer to the fixed pulley half 12a. For this reason, at the time of regenerative braking or reverse power running of the traveling motor 1 (the electric traveling vehicle). At the time of reverse), the movable pulley half 1
A driving force for separating the fixed pulley half 12a from the fixed pulley half 12a is generated.

With this configuration, in the CVT 2, although the details will be described later, the shifting operation and the adjustment of the power transmission capacity are basically performed by the mechanical driving means 16, 17.
The driving force of the electric driving means 18 and 19 is used as a combination with the driving force if necessary.

The starting clutch 3 has a clutch outer 30 integrally rotatably mounted on the output shaft 11 of the CVT 2 and a clutch inner 31 rotatably housed concentrically inside the starting clutch 3 as basic components. And a plurality of clutch plates 32 for connecting and disconnecting the clutch outer 30 and the clutch inner 31. The clutch inner 31 is rotatably inserted into the output shaft 11 of the CVT 2. It is inserted and fixed to a shaft 33, and is connected to the differential gear mechanism 4 via the counter shaft 33.

The starting clutch 3 is provided with a driving means 34 for applying a driving force for mutually pressing the clutch plates 32 to the clutch plates 32 as means for connecting the clutch outer 30 and the clutch inner 31. The driving means 34 is composed of a mechanical driving means 35 for mechanically generating the driving force and an electric driving means 36 for adjusting the mechanical driving force as needed.

More specifically, the mechanical driving means 35
For example, each of the clutch plates 3 according to the rotation speed of the output shaft 11.
The clutch 6 is provided with a centrifugal weight governor structure 37 for applying a driving force for pressing the clutch plates 2 to each other. The electric driving means 36 is, for example, an electromagnetic actuator controlled by the controller 6 using the battery 7 as a power supply. 38.

In this case, the centrifugal weight governor structure 3
Reference numeral 7 denotes a well-known centrifugal weight 39 which is rotatably mounted integrally with the output shaft 11 in the clutch outer 30 and is slidably provided toward the clutch plate 32 by centrifugal force during the rotation. Although the detailed description is omitted, when the output shaft 11 rotates, the centrifugal weight 39
Slides toward the clutch plate 32 due to centrifugal force and presses it, thereby generating a driving force for pressing the clutch plates 32 against each other.

With this configuration, in the starting clutch 3, although the details will be described later, the disconnecting operation is basically performed by the driving force of the mechanical driving means 35 generated with the rotation of the output shaft 11. The driving force of the electric driving means 36 is used in combination with this as needed.

In FIG. 1, reference numeral 40 denotes an accelerator sensor for detecting an operation amount A of an accelerator (not shown), reference numeral 41 denotes a vehicle speed sensor for detecting a vehicle speed V, and reference numeral 42 denotes a rotational speed of the drive pulley 10 of the CVT 2 (the motor 1 and the driving motor 1). rotational speed sensor for detecting the rotational speed) N ₁ of the input shaft 9, the rotational speed of the rotational speed (output shaft 11 of the driven pulley 12 of 43 CVT 2) N
Rotational speed sensor for detecting a _2, 44 is a forward / reverse detecting sensor for detecting an operation position of the forward-reverse switching lever (not shown), each of these sensors 40 to 44 so as to output a detection signal to the controller 6 I have.

The controller 6 controls the operation of the electromagnetic actuators 23 and 24 of the CVT 2 and the electromagnetic actuator 38 of the starting clutch 3 based on the detection signals of these sensors 40 to 44, as will be described in detail later. The operation of the traveling motor 1 is controlled via the drive circuit 8.

Next, the operation of the electric vehicle will be described.

In FIG. 1, in this electric traveling vehicle, when an accelerator (not shown) is operated while a forward / reverse switching lever (not shown) is operated to one of the “forward” and “reverse” positions. Under the control of the controller 6, the traveling motor 1 is driven by being supplied with power from the battery 7 via the drive circuit 8 (forward or reverse power running of the motor 1). At this time, the driving force of the traveling motor 1 is CV.
T2, the starting clutch 3, the countershaft 33, and the differential gear mechanism 4 are sequentially transmitted to the drive wheels 5, 5, whereby the electric traveling vehicle travels.

When the accelerator is turned off (accelerator operation amount A = 0%) during this traveling and coasting is performed, the traveling motor 1 is driven from the drive wheels 5 and 5 to operate as a generator. At this time, the energy generated by the electric motor 1 is charged into the battery 7 via the drive circuit 8, and the electric motor 1 is regeneratively braked.

In this case, when powering the traveling motor 1, the controller 6 uses the battery 7 to generate a target output torque predetermined in accordance with the accelerator operation amount A and the vehicle speed V from the battery 7. The amount of power supplied to the electric motor 1 is controlled via the drive circuit 8, and basically, the larger the accelerator operation amount A, the greater the output torque of the traveling electric motor 1.

In the traveling of the electric traveling vehicle,
The connection operation of the starting clutch 3 is performed as described below.

That is, the starting clutch 3 is basically provided with the mechanical drive means 35 (centrifugal weight) associated with the rotation of the output shaft 11 at the lowest speed ratio of the CVT 2 (hereinafter referred to as low ratio) when the electric vehicle starts moving. Governor structure 3
The driving force of 7) is applied to the clutch plates 32 and the clutch plates 32 are connected by being pressed against each other. At this time, when the starting clutch 3 is connected only by the mechanical driving means 35, The characteristic of the torque transmission capacity is the rotation speed of the traveling motor 1 (the rotation speed of the drive pulley 10).
Relative to N _1, is set, for example, as shown by the solid line shows the curve a in FIG. 2 (a).

In this figure, “N _in ” is the rotation speed of the traveling motor 1 at which the connection of the starting clutch 3 is started in the low ratio of the CVT 2, and “N _c ” is the torque transmitting capacity of the starting clutch 3 of the CVT 2. the rotation speed of the driving motor 1 the maximum output torque of the driving motor 1 reaches capacity "T _M" capable of transmitting at low ratio, the torque transmission capacity of the starting clutch 3 according to the mechanical drive means 35 is rotated over N _in in speed N _1, it continues to increase with increasing rotational speed N _1. On the other hand, when the accelerator operation amount A is large when the electric traveling vehicle starts, for example, when A = 100%, rapid acceleration is required. Therefore, the torque transmission capacity of the start clutch 3 is, for example, a curve b shown by a solid line in FIG. As shown in
Rapid torque transmission capacity with increasing rotational speed N ₁ "T
_M "is preferably set.
In the figure, "N _ST" is a rotating speed N ₁ of the driving motor 1 in the curve b torque transmission capacity reaches "T _M", which is N _ST <N _C.

In the case of regenerative braking of the electric motor 1, it is preferable to drive the electric motor 1 as a generator as much as possible from the driving wheels 5 and 5 until immediately before the electric vehicle stops. The torque transmission capacity of the starting clutch 3 is such that the driving force from the driving wheels 5 and 5 is applied to the traveling motor 1 even when the rotation speed N ₁ is equal to or less than “N _in ”, as shown by a curve c shown by a broken line in FIG. It is preferable that the setting be made so as to be transmitted.

Therefore, in this embodiment, according to the rotation speed N ₁ of the traveling motor ₁ and the accelerator operation amount A, etc.
For example, as shown in FIG.
(Electromagnetic actuator 38) The electric driving means 36 is operated to generate a driving force, and if necessary, the driving force of the electric driving means 36 is combined with the driving force of the mechanical driving means 35 to produce the clutch plate. 32, the starting clutch 3 is connected.

More specifically, when the electric vehicle starts moving,
When N ₁ <N _in , the driving force of the electric driving means 36 is set to “0” irrespective of the accelerator operation amount A, that is, the electromagnetic actuator 38 is not operated, and only the driving force of the mechanical driving means 35 is used. The starting clutch 3 of the clutch plate 3
2 to start the connection of the starting clutch 32.

When N _in ≦ N ₁ ≦ N _c , the accelerator operation amount A is in a relatively small range, for example, 0
In the range of 50% to 50%, the driving force of the electric driving means 36 is set to "0", the starting clutch 3 is connected only by the driving force of the mechanical driving means 35, and the accelerator operation amount A is relatively large. In a range, for example, in the range of 50 to 100%, the electromagnetic actuator 38 is operated to generate a driving force of the electric driving means 36, and the driving force of the starting clutch 32 is combined with the driving force of the mechanical driving means 35. Connection. In this case, the electromagnetic actuator 38 is operated so that the driving force of the electric driving means 35 increases as the accelerator operation amount A increases, for example, as shown in FIG.

When N ₁ > N _C , the driving force of the electric driving means 36 is set to “0” regardless of the accelerator operation amount A, and the starting clutch is driven only by the driving force of the mechanical driving means 35. 32 connections are made. This is because N ₁ > N _C , as is clear from the definition of “N _c ” described above.
This is because the starting clutch 3 is brought into a connected state in which any driving force of the traveling electric motor 1 can be transmitted only by the driving force of the mechanical driving means 35.

At the time of regenerative braking (A = 0%, vehicle speed V> 0
), When 0 <N ₁ <N _C , the electromagnetic actuator 38 is operated in order to generate a predetermined driving force capable of connecting the starting clutch 3 to the electric driving means 36.
In this case, in particular, when N ₁ <N _in , the driving force of the mechanical driving means 35 does not substantially contribute to the connection of the starting clutch 3 as described above. The clutch 3 will be connected.

Note that even during this regenerative braking, N ₁ > N
When the state becomes _C , the connection of the starting clutch 3 is performed only by the driving force of the mechanical driving means 35, as in the case described above (during power running of the traveling motor 1).

The operation of the electric drive means 36 is performed under the control of the controller 6.
Operates the electric driving means 36 as described above by performing the control shown in the flowchart of FIG.

By the operation control of the electric drive means 36, the characteristic of the torque transmission capacity of the starting clutch 3 becomes the characteristic as shown in FIG. 2A, and as described above, the accelerator operation amount A becomes smaller. When large, the starting clutch 3 is quickly connected, and during regenerative braking, the connected state of the starting clutch 3 is maintained until just before the vehicle stops, the driving motor 1 is driven as a generator, and the battery 7 is charged. .

In this case, the accelerator operation amount A is 50 to
In the range of 100%, the characteristic of the torque transmission capacity of the starting clutch 3 is apparent from the characteristic of the driving force of the electric driving means 36 shown in FIG. It will change between the curve b.

Next, the shift operation of the CVT 2 when the electric vehicle is traveling will be described.

In FIG. 1, CVT 2 is basically
When the electric traveling vehicle travels, the driving force of the mechanical driving means 16 (centrifugal weight governor structure 20) accompanying the rotation of the input shaft 9 is movable in a direction in which the two pulley halves 10a and 10b of the driving pulley 10 approach each other. By being applied to the pulley half 10b, a shift operation from the low ratio to the highest speed ratio (hereinafter, referred to as a top ratio) is performed. In this case, the characteristic of the driving force of the mechanical driving means 16 is for N ₁ (rotational speed of the drive pulley 10) rotational speed of the driving motor 1, for example, set as shown in the solid line shows the curve d in FIG. 3 (a).

Here, in the figure, "Q _N " is a driving force to the movable pulley half 10b (hereinafter referred to as a shifting required driving force) required for performing the shifting operation of the CVT 2, and "N _F " is a driving force. the rotation speed of the driving motor 1 to which the driving force of the mechanical drive means 16 has reached the required shift drive force Q _N, the driving force of the mechanical drive means 16, with the increase of the rotational speed N _1, increases.

On the other hand, it is preferable that the shift characteristics of the CVT 2 be set, for example, as shown in FIG.

[0086] Here, in the figure, e is a straight line indicating a relationship between the rotational speed N ₁ of the vehicle speed V driving motor 1 at the low ratio during forward, f is traveling motor and the vehicle speed V in the top ratio during forward 1 is a straight line indicating the relationship between the rotation speed N ₁ , g is a straight line indicating the relationship between the vehicle speed V and the rotation speed N ₁ of the traveling motor 1 in the low ratio when the vehicle is moving backward, and h and i are, for example, accelerator operations during forward movement, respectively. A = 100%, 3
The curve showing the shift characteristic at 0%, j indicates the time of regenerative braking (A
= 0%), k is a curve showing the reverse shift characteristic, and the CVT2 shift characteristic is basically the accelerator operation amount as shown by the curves h and i. As A increases, the range in which the gear ratio of the CVT 2 is maintained at a low ratio to obtain a large acceleration force is increased,
It is preferable that the output of the driving motor 1 is shifting operation so as to maintain a relatively large and the rotational speed N ₁ of the high-speed side which is, on the contrary, as the accelerator operation amount A is small, the energy of the driving motor 1 it is preferable that the shifting operation the transmission ratio of CVT2 so efficient to maintain the rotational speed N ₁ of the low-speed side becomes relatively good to quickly migrate to the top ratio from low ratio. Also, when the vehicle is moving in reverse, as shown by the curve k, the CVT 2 shift operation is not performed.
It is preferable to keep the ratio low.

Therefore, the characteristic of the driving force to the movable pulley 10b is, for example, the curve d shown in FIG. 3A when the accelerator operation amount A = 100%. The force Q _N does not depend on the tension of the V belt 13 of the CVT 2 or the contact force between the V belt 13 and the driven pulley 12, etc.
If the accelerator operation amount A is small (for example, in the range of 0 to 30%), assuming that the accelerator operation amount A is constant, for example, in the case of a curve d (A = 10
If 0%) than, it is preferable that the properties rapidly reach the required shift drive force Q _N. Here, in the figure,
“N _S ” is the rotational speed of the traveling motor 1 at which the driving force to the movable pulley 10 b reaches the required shifting driving force Q _N on the curve m.

When the vehicle is traveling in reverse, the characteristic of the driving force applied to the movable pulley 10b is, for example, as shown by a curve n in the imaginary line in the figure, in order to maintain the speed ratio of the CVT 2 at a low ratio. until the maximum allowable rotational speed N _R, it is preferable that the characteristic does not reach the required shift drive force Q _N.

Therefore, in this embodiment, according to the rotation speed N ₁ of the traveling motor ₁ and the accelerator operation amount A, etc.
For example, as shown in FIG.
8 (electromagnetic actuator 23) to operate the electric driving means 18 to generate a driving force. If necessary, the driving force of the electric driving means 18 is combined with the driving force of the mechanical driving means 16 to move the movable pulley. CV by adding to 10b
The shift operation at T2 is performed.

More specifically, when the electric traveling vehicle moves forward,
When it is N ₁ ≦ N _F is the accelerator operation amount A = 100
Except in the case of%, the electromagnetic actuator 23 is operated to generate the driving force of the electric driving means 18, and the driving force of the CVT 2 is performed by combining the driving force with the driving force of the mechanical driving means 16. In this case, when the accelerator operation amount A is small, for example, in a range of 0 to 30%, the driving force of the electric drive unit 18 is set to a constant magnitude, and when the accelerator operation amount A is larger (A ≧ 30%), the accelerator operation amount is As the operation amount A increases, the driving force of the electric driving means 18 decreases.

[0091] Further, when it becomes the N _1> N _F is not depending on the accelerator operation amount A, the driving force of the electric driving means 18 as "0", only by the driving force of the mechanical drive means 16 of CVT2 Shift operation is performed. This is, as is clear from the definition of "N _F " described above, when N ₁ > N _F ,
The CVT 2 is driven only by the driving force of the mechanical driving unit 16.
This is because a shift operation is performed.

When the accelerator operation amount A is 100%, the driving force of the electric driving means 18 is set to "0" regardless of the rotation speed N ₁ of the traveling motor 1, and the mechanical driving means 1
The shift operation of the CVT 2 is performed only by the driving force of No. 6.

[0093] Further, in the time of the reverse electric vehicle, the rotational speed N _F of the traveling motor 1 driving force to the movable pulley half 10b reaches the required shift drive force Q _N by only the driving force of the mechanical drive means 16 A rotation speed smaller than N ₁ <N _{S is set} as a threshold value, for example, the aforementioned “N _S ” (see FIG. 3A).
In this case, the driving force of the electric driving means 18 is set to "0" regardless of the accelerator operation amount A, and only the driving force of the mechanical driving means 16 is applied to the movable pulley half 10b. This is because if N ₁ <N _S , the driving force of the mechanical driving means 16 does not reach the required shifting driving force Q _N , and therefore, the speed ratio of the CVT 2 is maintained at a low ratio.

When N ₁ ≧ N _S , the electromagnetic actuator 23 is operated to move the movable pulley half 10
b is separated from the fixed pulley half 10a to generate a driving force of the electric driving means 18, and the driving force obtained by combining the driving force of the electric driving means 18 and the driving force of the mechanical driving means 16 is a driving force Q _N required for shifting. , The speed ratio of the CVT 2 is maintained at a low ratio. This is because, when N ₁ ≧ N _S , the rotation speed N ₁ approaches “N _F ”. Therefore, if only the driving force of the mechanical driving means 16 is continuously applied to the movable pulley half 10b,
This is because there is a possibility that the shift operation of the CVT 2 is performed. In this case, the driving force of the electric driving means 18 is set to be constant regardless of the accelerator operation amount A.

The operation of the electric driving means 18 is performed under the control of the controller 6.
Operates the electric drive unit 18 as described above by performing the control shown in the flowchart of FIG.

By the operation control of the electric drive means 18, the characteristic of the driving force to the movable pulley half 10b is changed to the characteristic shown by the curves d, p, and q shown by the solid lines in FIG. Becomes Here, the curve p indicates that the accelerator operation amount A is 0
The characteristic in the range of ３０30%, the curve q is the characteristic at the time of reverse travel, and when the accelerator operation amount A is in the range of 30 to 100%,
As is apparent from the characteristic of the driving force of the electric driving means 18 shown in FIG. 3B, the characteristic of the driving force to the movable pulley half 10b varies between the curve p and the curve d according to the accelerator operation amount A. Will change.

Further, the electric driving means 18
4, the shift characteristic of the CVT 2 becomes the characteristic shown in FIG. 4 together with the operation of the starting clutch 3, and as described above, basically, the rotation of the traveling motor 1 for performing the shift operation. The speed N ₁ becomes higher as the accelerator operation amount A is larger. When the vehicle is moving backward, the speed ratio of the CVT 2 is maintained at a low ratio.

Next, the operation of adjusting the power transmission capacity of the CVT 2 will be described.

In FIG. 1, CVT 2 is basically
When the electric traveling vehicle travels, the driving force of the mechanical driving means 17 that combines the urging force of the spring 21 and the driving force of the torque cam structure 22 is applied to the movable pulley half 12 of the driven pulley 12.
b, the contact force between the driven pulley 12 and the V-belt 13 is adjusted to adjust the power transmission capacity. In this case, the mechanical driving means 17
The characteristic of the driving force is set, for example, as shown by a curve r indicated by a solid line in FIG. 5A with respect to the speed ratio of the CVT 2 during the forward rotation of the traveling motor 1.

That is, the driving force of the mechanical driving means 17 is set so as to decrease as the speed ratio of the CVT 2 shifts from the low ratio to the top ratio. This is because the torque applied to the driven pulley 12 increases as the speed ratio of the CVT 2 approaches the lower ratio, and a larger power transmission capacity is required. Further, as the speed ratio approaches the top ratio, the driven pulley 12 This is because the applied torque decreases and the required power transmission capacity decreases.

In this case, the torque cam structure 2
As described above, the driving force of No. 2 acts in the direction of moving the movable pulley half 12b of the driven pulley 12 away from the fixed pulley half 12a during the reverse rotation of the traveling motor 1 (during reverse driving) or during regenerative braking. When the vehicle is moving backward or during regenerative braking, as shown by a curve s indicated by a virtual line in FIG.
7, the driving force is smaller than that in the case of the curve r (during the forward rotation of the traveling motor 1), and the power transmission capacity is accordingly reduced.

On the other hand, since the traveling motor 1 is driven so as to generate a larger output torque as the accelerator operation amount A is larger, the larger the accelerator operation amount A, the larger the power transmission capacity is required in the CVT 2. Is done. Therefore, the characteristic of the driving force to the movable pulley half 12b is, for example, when the curve r is a characteristic in a range where the accelerator operation amount A is small, for example, in a range of 0 to 30%, when the accelerator operation amount A is large. For example (when A = 100%), for example, as shown by a curve t shown by a solid line in FIG.

Therefore, in the present embodiment, as shown in FIG. 5B, for example, as shown in FIG. 5B, the driving force of the electric driving means 19 (electromagnetic actuator 24) is generated in accordance with the accelerator operation amount A or the like. The electric drive means 19 is operated, and if necessary, the driving force of the electric drive means 19 is applied to the movable pulley 12b together with the drive force of the mechanical drive means 17 to adjust the power transmission capacity of the CVT 2. I try to do it.

More specifically, when the electric traveling vehicle moves forward,
In a range where the accelerator operation amount A is small, for example, in a range of 0 to 30%, the driving force of the electric driving unit 19 is set to “0”.
The power transmission capacity is adjusted only by the driving force of the mechanical driving means 17, and the electromagnetic actuator 24 is operated in a range where the accelerator operation amount A is large, for example, in a range of 30 to 100%, and the movable pulley half 12b In the direction in which the drive force approaches the fixed pulley half 12a, and the power transmission capacity is adjusted by the drive force obtained by combining the drive force of the electric drive means 19 and the drive force of the mechanical drive means 17. Close. In this case, the driving force of the electric driving means 19 is increased as the accelerator operation amount A increases.

Further, at the time of regenerative braking or reverse travel, the electromagnetic actuator 24 is operated to generate the driving force of the electric driving means 19 irrespective of the accelerator operation amount A, and the driving force and the mechanical driving means 17 The power transmission capacity is adjusted by the driving force combined with the driving force. As described above, this is because the mechanical driving means 17 is used during regenerative braking or reverse travel.
In this case, the driving force of the electric driving means 19 is increased with an increase in the accelerator operation amount A, and the driving force is set to be larger than that at the time of forward movement.

The operation of the electric drive means 19 is performed under the control of the controller 6.
Operates the electric driving means 19 as described above by performing the control shown in the flowchart of FIG.

By controlling the operation of the electric drive means 19, the characteristic of the driving force to the movable pulley half 12b is independent of whether the vehicle is moving forward, backward, or during regenerative braking, as shown in FIG. The characteristics shown in the curves r and t shown by the solid lines are obtained. As the speed ratio of the CVT 2 shifts from the low ratio to the high ratio, the driving force to the movable pulley half 12b decreases, and the accelerator operation amount A increases. Accordingly, the driving force applied to the movable pulley half 12b increases between the curves r and t. Thus, the power transmission capacity of the CVT 2 is determined according to the speed ratio of the CVT 2 and the accelerator operation amount A.
The adjustment is performed so that the driving force of the traveling motor 1 can be reliably transmitted from the input shaft 9 side of the CVT 2 to the output shaft 11 side.

As described above, in the electric vehicle according to the present embodiment, the operation of the CVT 2 and the starting clutch 3 is basically performed by the mechanical driving force, and the electric driving force is used together if necessary. As a result, the operation of the CVT 2 and the starting clutch 3 can be appropriately controlled according to various traveling conditions with relatively small power consumption, and excellent traveling performance can be obtained.

[0109]

As is apparent from the above description, according to the present invention, the shifting operation of the CVT and the adjustment of the power transmission capacity can be performed.
Basically, the driving force of the mechanical driving means is used, and the driving force of the electric driving means is used together with the driving force of the mechanical driving means. The CVT speed change operation and power transmission capacity can be reduced during sudden acceleration or constant speed traveling of an electric traveling vehicle, or during regenerative braking of a traveling electric motor, while the power consumption of the electric drive means is relatively small. Thus, an electric traveling vehicle having excellent traveling performance can be provided.

In this case, when the operation amount of the accelerator of the electric traveling vehicle is large, the driving force of the mechanical driving means such as the centrifugal weight governor structure causes the CV to run in the high-speed rotation region of the traveling motor.
The shift operation of T is performed, and when the operation amount of the accelerator is small, the shift operation of CVT is performed in the low-speed rotation region of the traveling motor by the driving force of the mechanical drive unit and the drive force of the electric drive unit. Accordingly, the shift characteristic of the CVT can be made such that a larger acceleration force can be obtained as the accelerator operation amount is larger, and the power consumption of the electric drive means is reduced as the accelerator operation amount is larger. Can be.

When the electric traveling vehicle is moving backward, the driving force of the electric driving means is generated in a direction opposite to the driving force of the mechanical driving means to maintain a predetermined low-speed gear ratio such as the minimum speed of the CVT. With this configuration, the electric traveling vehicle can be moved backward by a large traveling driving force.

When the output torque of the traveling motor is small, the power transmission capacity of the CVT is adjusted by the driving force of a mechanical driving means such as a torque cam structure, and when the output torque of the traveling motor is large, the mechanical driving means is adjusted. By adjusting the power transmission capacity of the CVT by combining the driving force of the CVT with the driving force of the electric driving means, it is possible to secure a power transmission capacity capable of reliably transmitting the driving force of the traveling motor. In addition, the power consumption of the electric driving means can be reduced as the output torque of the traveling motor decreases.

Next, according to the electric traveling vehicle of the present invention provided with the above-mentioned starting clutch, the starting clutch is disengaged basically by the driving force of the mechanical driving means and, if necessary, the electric driving means. The driving force of the mechanical driving means is assisted by the driving force of the mechanical driving means, so that the configuration of the mechanical driving means is relatively small, and the power consumption of the electric driving means is relatively small. In addition, the present invention provides an electric traveling vehicle having excellent traveling performance, in which the start / stop clutch disengagement can be appropriately controlled in accordance with various traveling conditions such as sudden acceleration start of the electric traveling vehicle and regenerative braking of the traveling electric motor. be able to.

In this case, the starting clutch is connected by the driving force of the mechanical driving means such as the centrifugal weight governor structure when the operation amount of the accelerator of the electric traveling vehicle is small, and the mechanical operation is performed when the operation amount of the accelerator is large. By connecting the starting clutch by combining the driving force of the driving means and the driving force of the electric driving means, the larger the accelerator operation amount, the more quickly the starting clutch can be connected, and As the operation amount is smaller, the power consumption of the electric drive means can be reduced.

Further, at the time of regenerative braking of the traveling motor, the starting clutch is maintained in the connected state as much as possible by the driving force of the electric driving means, so that the battery is regenerated by the regenerative braking of the traveling motor. The charging time can be made as long as possible, so that the battery capacity can be prevented from lowering as much as possible, and the continuous traveling distance of the electric traveling vehicle can be extended.

[Brief description of the drawings]

FIG. 1 is a schematic explanatory diagram for explaining a configuration of a main part of an example of an electric traveling vehicle according to the present invention;

FIG. 2 is a diagram for explaining the operation of the electric traveling vehicle;

FIG. 3 is a diagram for explaining the operation of the electric traveling vehicle,

FIG. 4 is a diagram for explaining the operation of the electric traveling vehicle;

FIG. 5 is a diagram for explaining the operation of the electric traveling vehicle,

FIG. 6 is a flowchart for explaining the operation of the electric traveling vehicle,

FIG. 7 is a flowchart for explaining the operation of the electric traveling vehicle,

FIG. 8 is a flowchart for explaining the operation of the electric traveling vehicle,

FIG. 9 is a schematic explanatory diagram for explaining a basic configuration of a CVT.

[Explanation of symbols]

1 ... electric motor for traveling, 2 ... CVT (stepless transmission), 3 ...
Start clutch, 9 ... input shaft, 10 ... drive pulley, 10a
... fixed pulley half, 10b ... movable pulley half, 11 ... output shaft, 12 ... driven pulley, 12a ... fixed pulley half, 1
2b: Half movable pulley, 13: V belt (endless strip),
14, 15 ... driving means, 16, 17 ... mechanical driving means,
18, 19: electric drive means, 32: clutch plate, 34
... Driving means, 35 ... Mechanical driving means, 36 ... Electrical driving means.

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁶ , DB name) B60K 41/14 B60L 15/20 F16H 9/12

Claims (5)

(57) [Claims] A drive-side fixed pulley half rotatably mounted integrally on an input shaft to which a driving force of a traveling motor is transmitted, and a drive-side fixed pulley half rotatably supported on the input shaft. A drive pulley comprising a drive-side movable pulley half provided to be able to approach and separate from the pulley half, and a driven-side fixed rotatably mounted integrally with an output shaft for transmitting a driving force to the drive wheels. A driven pulley comprising a pulley half and a driven movable pulley half rotatably supported on the output shaft and provided to be able to approach and separate from the driven fixed pulley half; and the drive pulley. And an endless strip wound between the two pulleys to transmit power from the driven pulley to the driven pulley, and the movable pulley half of one of the two pulleys approaches and separates from the fixed pulley half. Move the other pulley to follow this Separating the over Li halves to the fixed pulley half,
A stepless transmission that changes the diameter of the endless strips in both pulleys steplessly by bringing them closer to each other to make the speed ratio between the input shaft and the output shaft variable and to adjust the power transmission capacity thereof. In the electric traveling vehicle, the driving means for moving the movable pulley half of each pulley toward and away from the fixed pulley half is mechanical driving means for mechanically generating the driving force in conjunction with the rotation of each pulley. An electric driving means for electrically generating a driving force in accordance with the driving force of the mechanical driving means , wherein the mechanical driving means is used when shifting the continuously variable transmission.
The fixed speed of the drive pulley depends on the rotation speed of the input shaft.
Driving force for bringing the movable pulley half closer to the constant pulley half
To the movable pulley half, and the electric traveling vehicle
When the accelerator operation amount of the
Perform the shifting operation of the continuously variable transmission to a high speed gear ratio.
The driving force required to drive the motor
The movable pulley half of the drive pulley in the high-speed rotation region
Means for applying to the body, wherein the electric drive means has a small operation amount of the accelerator
Sometimes the continuously variable transmission changes from the lowest speed ratio to the highest speed ratio
Speed change operation at a speed equal to or lower than the predetermined rotational speed of the traveling motor.
It is necessary for the shift operation to be performed in the lower low-speed rotation region.
Drive force together with the drive force of the mechanical drive means.
Electric vehicles, which comprises a means to impart to the movable pulley half of the dynamic pulley. 2. A pre-Symbol electrical drive means, in a high-speed rotation area of at least the electric motor for running the shifting operation of the continuously variable transmission by the driving force of said mechanical drive means during reverse travel of the electric vehicle is performed Tokoro the gear ratio of the inorganic stage transmission
Characterized that you include means to grant driving force in the direction to the movable pulley half of separating the movable pulley halves of the drive pulley from the fixed pulley half to maintain the low-speed side of the gear ratio of the constant The electric traveling vehicle according to claim 1. 3. The mechanical drive means adjusts a contact force between the driven pulley and the endless strip in accordance with a torque applied to the driven pulley when an output torque of the traveling motor is small. includes means for adjusting the power transmission capacity of the continuously variable transmission, the electric drive means, said increasing the contact force between the driven pulley and an endless strip material when the output torque of the electric motor for running is large stepless raising the power transmission capacity of the transmission
And wherein it to contain means to grant to the movable pulley half of the drive force to approach base rather the movable pulley halves of the driven pulley to the fixed pulley half body together with the driving force of said mechanical drive means The electric traveling vehicle according to claim 1, wherein 4. An electric vehicle equipped with a starting clutch having a clutch plate for connecting and disconnecting a power transmission path from a traveling motor to a drive wheel, wherein the clutch plate is connected to connect the starting clutch. A driving means for engaging, a mechanical driving means for mechanically generating the driving force in association with the rotation of the traveling electric motor, and an electric driving force electrically combined with the driving force of the mechanical driving means. to the electrical drive means give rise
It is more structure, the mechanical drive means, the rotation speed of the moving electric motor
The driving force for connecting the starting clutch in response to the
And the rotational speed of the traveling motor is increased.
When a predetermined first rotation speed is reached, the starting clutch is
Connection state that can transmit the maximum output torque of the traveling motor and
Means for applying a predetermined driving force to the clutch plate, wherein the electric driving means includes an accelerator operation of the electric traveling vehicle.
When the amount is large, the predetermined first rotational speed of the traveling motor
The starting clutch is electrically operated for running at a rotation speed less than
Driving force in a connected state capable of transmitting the maximum output torque of the machine
Together with the driving force of the mechanical driving means.
An electric traveling vehicle, characterized by including means for applying to an electric vehicle. Wherein said mechanical drive means, the driving force that allowed to initiate connection of the starting clutch when the rotational speed before Symbol traveling motor has reached a predetermined second rotational speed lower than the first rotational speed and means for applying to said clutch plate, said electrical drive means, said at driving motor regenerative braking, the starting even rotational speed of the traveling motor becomes equal to or less than the predetermined second rotation speed 4. electrical vehicle according to the driving force for maintaining engagement of the clutch, characterized in it to contain means to grant to the clutch plate.