JP2002186116A - In-car radio optical lan system of electric vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an in-car radio optical LAN system for an electric vehicle which can reduce the number of used control units and optical fibers for connecting them and can be wired through a wiring space common to any car body structure. SOLUTION: In the in-car radio optical LAN system for an electric vehicle, pillar-shaped frames 2 and 2' having nearly rectangular cross sections are set up to constitute a car body, and an optical fiber 30 for an optical LAN is wired within the pillar-shaped frames 2 and 2'.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an in-vehicle wireless optical LAN (local area network) for an electric vehicle, and more particularly to a LAN system suitable for an integrated wiring system by multiplex transmission in a vehicle or the like.

[0002] As shown in FIG. 7, an electric vehicle is a vehicle that can run using only the driving force of an electric motor 101.
As a power source to be supplied to the electric motor 101, a vehicle using a secondary battery (battery) is called an electric vehicle A in a narrow sense, a vehicle using an engine generator is called a series hybrid vehicle B, and a vehicle using a fuel cell is called a fuel cell vehicle C. I will. In FIG. 7, 102 is a wheel, 103 is a controller, 104 is a secondary battery, 201 is an engine,
02 is a generator, 301 is a hydrogen supply source, and 302 is a fuel cell.

[0003] As described above, an electric vehicle is a vehicle that can travel using only the driving force of a rotary electric motor, and as a power source to be supplied to the electric motor, a secondary battery, a fuel cell, and an internal combustion engine are used. Is defined as a vehicle using a generator, a solar cell, or the like using these, or a combination thereof. However, in the following description, an electric vehicle using only a secondary battery is considered, but a vehicle using a fuel cell, an internal combustion engine generator, or a solar battery as a power source is also included.

[0004]

2. Description of the Related Art Conventionally, in a vehicle, when transmitting a signal of a plurality of channels between two points, a communication side serializes parallel electric input signals, converts the signals into electric light, and transmits the signals through an optical fiber. On the receiving side, on the other hand, the serial optical input signal from the optical fiber is photoelectrically converted and then serial-parallel converted to control each target load. As a result, a plurality of electric wires can be replaced with one optical fiber,
The wiring cable can be made thinner.

[0005]

However, in the prior art, since data has been bidirectionally transmitted between two points using two optical fibers, operation switches, lamps, and relay boxes have been used. When devices such as are distributed in various places, it is necessary to use a large number of control units for controlling the input and output of signals to and from them, and a large number of optical fibers for connecting them. There was a problem that it became expensive.

Further, the conventional optical fiber wiring does not have a common wiring structure, and has to be specially designed in accordance with each vehicle body structure.

SUMMARY OF THE INVENTION In view of the above-mentioned circumstances, the present invention provides an in-vehicle wireless optical LAN for an electric vehicle in which the number of control units and optical fibers connecting them can be reduced, and a common wiring space can be provided in the vehicle body structure for wiring. The purpose is to provide a system.

[0008]

In order to achieve the above object, the present invention provides: [1] In an in-vehicle wireless optical LAN system of an electric vehicle, a columnar frame having a rectangular cross section is assembled to form a vehicle body, and the columnar frame is provided. An optical fiber for an optical LAN is wired therein.

[2] An in-vehicle wireless optical LAN system of an electric vehicle is characterized in that a vehicle body is constructed by assembling a columnar frame having a rectangular cross section, and an optical transceiver is arranged in the columnar frame.

[3] In the in-vehicle wireless optical LAN system for an electric vehicle according to the above [1] or [2], a hollow upper frame for supporting a body is mounted on an upper portion of the columnar frame, and the hollow of the upper frame is provided. An optical fiber for an optical LAN is wired in the portion.

[4] In the in-vehicle wireless optical LAN system of the electric vehicle according to the above [1], [2] or [3], a hollow upper frame for supporting a body is mounted above the columnar frame. The optical transmission / reception device is arranged in a hollow portion of the upper frame.

[0012]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a perspective view showing an electric vehicle body and its equipment according to an embodiment of the present invention.

First, a flat floor of an electric vehicle according to an embodiment of the present invention will be described.

The vehicle body of the embodiment of the present invention is an in-wheel drive, a battery built-in type frame (BBF) in which a battery is incorporated under the floor, and each wheel is connected to the front and rear of the vehicle.
The tandem wheel type suspension that can be separated into individual parts allows the room to be widened, and the body has relatively low air resistance.

As shown in FIG. 1, a chassis (chassis) 1
Are a plurality of hollow center frames (columnar frames) 2, 2 'having a substantially rectangular cross section, and side frames 3A, 3
A ', 3B, 3B'. The frames 2, 2 ', 3A, 3A', 3B, 3B 'are fixed so that the surfaces thereof are flat, and a battery 21, 22, 23 is housed in these frames.

In the BBF structure, since the battery storage container and the frame structure can be used in combination, there is no need to provide a new space for storing the battery, and there is an advantage that the weight of the entire vehicle body can be reduced. In addition, since the heavy battery is stored under the floor, there is an advantage that the center of gravity of the vehicle body is low, and the stability and riding comfort of the vehicle are improved.

By adopting the BBF structure and the in-wheel system, the effective use space can be widened, the entire vehicle body can be reduced in weight, the center of gravity of the vehicle body can be lowered, the stability and riding comfort of the vehicle can be improved, and the road holding can be improved. You get a good electric car.

In addition to the battery and the driving device, the electric vehicle is also equipped with a control device for controlling the speed and torque of the rotary electric motor, a vehicle-mounted charger, a heating / cooling device, and the like. As for the battery, the chassis 1
By storing it in the internal space of the vehicle body, the effective volume inside the vehicle body can be increased.

Further, by adopting a tandem wheel type suspension and replacing one wheel of a conventional automobile with two small-diameter wheels arranged in front and rear, vibration received by the vehicle body from the road surface is minimized. You.

In an electric vehicle in which wheels are driven by a rotary electric motor, a chassis 1 of the vehicle is composed of a plurality of axially hollow frames.
Thereby, the rigidity of the chassis 1 is increased, and the batteries 21, 22, and 23 are housed in the chassis 1, and at least a part of the rotary electric motor is housed in a wheel portion of a wheel. The chassis 1 is configured to be connected via a suspension device.

In the chassis 1, at least a part of the control device for controlling the speed and the torque of the rotary electric motor is accommodated, and at least a part of the charger is also accommodated. Two consecutively mounted wheels are configured to be mounted via a suspension device such that two or more front wheels or rear wheels of the wheels are continuously mounted in the front-rear direction.

The chassis 1 is constituted by four hollow bodies having a substantially rectangular cross section so that the upper surface is substantially flat. That is, it is composed of axially hollow side frames 3A, 3A ', 3B, 3B' located on both sides of the vehicle and similarly axially hollow center frames 2, 2 'located inside thereof. . And these frames 2,
2 ', 3A, 3A', 3B, 3B 'are arranged in parallel to each other so as to have a predetermined width, and a reinforcing sub-frame (not shown) is attached thereto, and the side frames 3A, 3A.
Doors are attached to A ', 3B, 3B', and seats, steering, accelerator or brake pedals, cowls, levers (not shown) for determining a traveling direction, etc. are attached to the center frames 2, 2 '. This constitutes a basic part of the electric vehicle.

The frames 2, 2 ',
The manufacturing method, material, etc. of 3A, 3A ', 3B, 3B' are not particularly limited. However, for example, it is desirable to mold by aluminum extrusion molding technology.

The center frames 2, 2 'and side frames 3A, 3A', 3B,
3B 'can be divided into a plurality of parts in the front-rear direction in order to enhance the strength and the size of the stored items, but FIG. 1 does not show an example of the division.

The center frames 2, 2 'have a length substantially equal to the total length of the vehicle minus the collision buffer portions at the front and rear of the vehicle, and the height and width of the batteries 21 and 2 accommodated therein.
Considering the shape or size of 2, 23.
The height is slightly higher than the height of 1, 22, 23... And the width is slightly wide.

The side frames 3A, 3A ', 3
B and 3B 'are shorter than the center frames 2 and 2' only by the portion of the wheel house, and the height is
It is almost the same height as 2 '. 13, 13 'are rear rear wheels, 14 and 14' are front rear wheels, 15 and 15 'are rear front wheels, and 16 and 16' are front front wheels.

According to this embodiment, the battery can be stored in any of the frames 2, 2 ', 3A, 3A', 3B, 3B 'of the chassis 1, but in the embodiment shown in FIG. An example is shown in which the parts are housed in the center frames 2 and 2 'located at the center. In this case, batteries 21, 22, 2
3 can be stored from the front or the rear.

However, in the embodiment shown in FIG. 1, since a drive device including a drive motor for driving the wheels 8, 8 'and a speed reducer is disposed at the right rear, the table 20 is provided from the front. And put them in and out.

The center frames 2 and 2 'include control devices 4 and 4' for controlling the speed and torque of a rotary electric motor, which will be described later, a charger 5 for charging batteries 21, 22, 23,. Cooling / heating device 6 and the like are stored.

The in-wheel drive devices 7, 7 'themselves are integrally formed with a reduction gear mechanism for reducing the rotational speed of the rotary electric motor, a mechanical brake, bearings for supporting rotation, and the like. . The outer frame, which is mounted inside the wheels 8, 8 'of the drive wheels and to which the armature of the rotary electric motor is fixed, is mounted on the suspension arm. Tires 9, 9 'on wheels 8, 8'
Is attached to enable traveling.

Arms, springs, dampers and the like forming a suspension are attached to the in-wheel type driving devices 7 and 7 ', but they are omitted in FIG. The front wheel is also attached to a center frame (not shown) via arms, springs, dampers, etc. forming a sub-frame and a suspension, but is also omitted in FIG.

In FIG. 1, the in-wheel drive devices 7, 7 'are mounted only on the rear wheels 8, 8'. However, they can be mounted only on the front wheels or on all eight wheels. It is also possible to attach to the wheel of. In FIG. 1, reference numerals 10 and 10 'denote wheels.

Next, the control unit of the present invention will be described with reference to FIG.

FIG. 5 is a schematic diagram of the control unit of the present invention.

The optical LAN driver 52 electrically connected to the microcomputer 51 is connected by an optical fiber 53 via an optical transmission device, and is connected so that data can be transferred anywhere by optical signals. Nodes are allocated to the optical LAN driver 52, and data (nodes) transmitted from a transmission unit attached to the optical LAN driver 52 is provided with destination recognition data.

Accordingly, the destination optical LAN driver 52
Has a function to avoid taking in and skipping data. The optical LAN driver 52 is electrically connected to the microcomputer 51, and an optical transmission device including a receiving unit 54 and a transmitting unit 55 is connected to the two-pair optical fiber 53.

The receiving section 54 is connected to a node detecting section 56, and an output signal of the node detecting section 56 is input to a parallel / serial converting section 57. The output signal of the parallel / serial conversion unit 57 is input to the DMA interface 58, and the output signal of the DMA interface 58 is input to the transmission unit 55 via the parallel / serial conversion unit 57, and is connected to the optical fiber 53 and transmitted. .

Electrical signals are input and output between the parallel / serial converter 57 and the DMA interface 58 in exactly the same manner as the electrical relationship between the optical LAN driver 52 and the microcomputer 51.

FIG. 4 is a block diagram showing an optical LAN system for a vehicle according to the present invention.

In this figure, reference numeral 41 denotes a first control unit which is connected to operation switches (not shown) such as wipers, headlights, starters and the like, and which controls the input and output of signals to and from the display lamps; This is a second control unit connected to operation switches such as a clutch switch and a door lock switch and their indicator lamps and controlling input and output of signals to and from them. 43 is a relay box 4
A third control unit 44 for controlling the input and output of the control signal to and 5 is an optical fiber.

The first control unit 41 is arranged in a combination switch section in front of the driver's seat in the instrument panel, and the second control unit 42 is arranged in the center console section in the instrument panel. The third control unit 43
It is located under the driver's seat floor.

The first, second, and third control units 41, 42, and 43 are connected to each other via an optical fiber 44 in a ring shape. As a result, a data network NT for performing data transmission among the first, second, and third control units 41, 42, and 43 is formed. That is, the data network NT functions as a kind of simple local area network (LAN).

As another embodiment, an optical transmission / reception device may be provided instead of the optical fiber to perform wireless optical transmission.

The hollow portions of the columnar frames 2, 2 'of the present invention can also be used as wiring spaces. As shown in FIG. 1, the center frames 2 and 2 'are assembled so that their surfaces are flat, so that the wiring space is widened on a straight line, and wiring can be easily performed.

The specific wiring is performed as shown in FIGS.

Openings are provided in the center frames 2 and 2 'from the floor surface, and bushes 31 are fitted into the openings. A through hole 32 is formed in the center of the bush 31 so that the optical fiber 30 can be inserted therethrough. One of the optical fibers 30 is wired inside the center frames 2 and 2 ', and the other is connected to a control unit of a specific device.

Further, the optical transmission / reception device may be fixed inside the hollow of the frame, and the optical transmission / reception may be performed within the frame. Wiring to the optical transmitting and receiving device is appropriately performed, and a bush can be used for the drawer.

FIG. 6 is a perspective view showing wiring to an upper frame of an electric vehicle according to another embodiment of the present invention.

As shown in this figure, a hollow upper frame 62 for supporting the body is mounted on the upper portion of the frame 61, and the light LA is inserted into the hollow portion of the upper frame 62.
The optical fiber 63 for N is configured for wiring.

The optical transmitting / receiving device 64 can be arranged in the hollow portion of the upper frame 62.

With this configuration, the wiring and communication components can be accommodated in the structural members of the electric vehicle, and the electrical components can be made compact and protected.

It should be noted that the present invention is not limited to the above-described embodiment, and various modifications are possible based on the spirit of the present invention, and these are not excluded from the scope of the present invention.

[0054]

As described above, according to the present invention, the following effects can be obtained.

(A) The chassis of the electric vehicle of the present invention comprises:
A plurality of axially hollow frames, whereby the rigidity of the chassis is increased, the battery is housed in the chassis, and at least a part of the rotary electric motor is housed in the wheel portion of the wheel; And the chassis are connected via a suspension device, so that the space in the vehicle compartment can be used effectively. Moreover, since the battery is housed in the hollow body of the chassis, the position of the center of gravity of the electric vehicle is lowered. Therefore, the effect of the unsprung weight can be minimized and the riding comfort of the vehicle is improved despite the adoption of the in-wheel drive device. Furthermore, since at least a part of the control device, the charger, and the cooling / heating device are housed in the chassis, the effective use space in the vehicle interior is further expanded.

(B) According to the present invention, the first, second, and third control units are connected in a ring shape through one optical fiber, so that the first, second, and third control units are connected. A data network NT for transmitting data between the control units is formed. For this reason, the number of wirings can be reduced, and backup of control signal transmission can be performed.

Further, since the wiring of the optical fiber can be carried out in the frame of the present invention, the wiring and communication parts can be accommodated in the structural members of the electric vehicle, and the electrical components can be made compact and protected. Can be. Moreover, the construction becomes easy.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a vehicle body of an electric vehicle and equipment thereof according to an embodiment of the present invention.

FIG. 2 is a wiring diagram of an optical fiber showing an embodiment of the present invention.

FIG. 3 is an enlarged view of a portion A in FIG. 2;

FIG. 4 is a schematic diagram of an optical LAN showing an embodiment of the present invention.

FIG. 5 is a schematic diagram of the control unit of FIG. 4;

FIG. 6 is a perspective view showing wiring to an upper frame of an electric vehicle according to another embodiment of the present invention.

FIG. 7 is a diagram showing a basic configuration of an electric powered vehicle.

[Explanation of symbols]

 Reference Signs List 1 chassis (chassis) 2, 2 'center frame (pillar frame) 3A, 3A', 3B, 3B 'side frame 4, 4' control device 5 charger 6 cooling / heating device 7, 7 'in-wheel drive device 8, 8 ', 10, 10' wheels 9, 9 ', tires 13, 13' rear rear wheels 14, 14 'front rear wheels 15, 15' rear front wheels 16, 16 'front front wheels 20 units 21, 22, 23 batteries 30 , 44, 53 Optical fiber 31 Bush 32 Through hole 41, 42, 43 Control unit 44 Optical fiber 45 Load (relay box) 51 Microcomputer 52 Optical LAN driver 54 Receiver 55 Transmitter 56 Node detector 57 Parallel / serial converter 58 DMA interface 61 Frame 62 Hollow upper frame 63 Optical LAN Fiber 64 for optical transmission and reception

Claims (4)

[Claims] 1. An in-vehicle wireless optical LAN system for an electric vehicle, comprising: assembling a columnar frame having a rectangular cross section to form a vehicle body; and wiring optical fibers for an optical LAN in the columnar frame. 2. An in-vehicle wireless optical LAN system for an electric vehicle, wherein a vehicle body is constructed by assembling a columnar frame having a rectangular cross section, and a light transmitting / receiving device is arranged in the columnar frame. 3. An in-vehicle wireless optical LAN system for an electric vehicle according to claim 1, wherein a hollow upper frame for supporting a body is mounted on an upper portion of said columnar frame, and an optical LAN is provided in a hollow portion of said upper frame. Wireless optical LAN system in an electric vehicle, wherein an optical fiber for wiring is wired. 4. The in-vehicle wireless optical LAN system for an electric vehicle according to claim 1, wherein a hollow upper frame for supporting a body is mounted on an upper portion of the columnar frame, and the hollow upper frame is provided in a hollow portion of the upper frame. An in-vehicle wireless light L of an electric vehicle, wherein an optical transceiver is provided.
AN system.