WO2012032796A1

WO2012032796A1 - Wiring structure of motor vehicle

Info

Publication number: WO2012032796A1
Application number: PCT/JP2011/053069
Authority: WO
Inventors: 志賀弘章; 桑原正紀
Original assignee: 住友電装株式会社
Priority date: 2010-09-06
Filing date: 2011-02-15
Publication date: 2012-03-15
Also published as: JP2012056368A

Abstract

Provided is a structure which is capable of efficiently manufacturing a wire harness wired in a front side engine room by performing underfloor wiring from above a floor on a rear side. The wire harness is divided into three wire harnesses which are routed in the front side engine room, in an intermediate portion underfloor area, and in a rear side above-floor area, respectively, or divided into two wire harnesses which are routed in the intermediate portion underfloor area and the rear side above-floor area and in the front side engine room, a connection member which connects these divided wire harnesses is provided, the wire harness in the intermediate portion underfloor area is set as a shared underfloor routing wire harness which is routed for a plurality of types of vehicle, and an electric wire which forms the shared underfloor routing wire harness is inserted through in a pipe. Meanwhile, the wire harnesses which are routed in the front side engine room and in the rear side above-floor area are set as dedicated wire harnesses for each vehicle, and the electric wire and an exterior material of the shared underfloor routing wire harness can be different from an electric wire and an exterior material of the front side and rear side above-floor routing wire harnesses.

Description

Automotive wiring structure

The present invention relates to an automobile wiring structure, and more particularly, in a hybrid vehicle or an electric vehicle, it is possible to efficiently form a wire harness that is continuously routed through the underfloor wiring portion at the front and rear portions of the vehicle and reduce the cost. Is intended.

Conventionally, a structure shown in FIGS. 6A and 6B is proposed in Japanese Patent Application Laid-Open No. 2004-224156 (Patent Document 1) as a wiring structure of a power cable arranged in a hybrid vehicle or an electric vehicle. In this structure, three power cables (high voltage cables) 102U, 102V, 102W connected to the inverter 100 mounted on the rear side are connected from the rear side (rear) floor upper wiring area to the middle lower floor wiring area. Through, continuous wiring into the engine room on the front side (front).
In the underfloor wiring area, the high-voltage cables are routed forward through the metal core shield pipes (protection pipes) 110 to the lower part of the floor and drawn into the engine room on the front side, and mounted in the engine room. The motor 101 is connected. The three

power cables

102U, 102V, and 102W are collectively passed through a flexible collective shield tube (protective tube) 120 in the rear floor installation area and the front engine room arrangement area.
In addition, in the rear side floor arrangement area and the front side engine room, when passing through the shield tube, when passing through the corrugated tube, the exterior materials are different depending on the vehicle conditions according to the vehicle type.

As described above, the

power cables

102U, 102V, 102W are respectively passed through the rigid core shield pipes 110 in the wiring area below the floor, so that the

power cables

102U, 102V, 102W can be wired below the floor. Further, in the wiring area in the engine room, the space above the floor can be effectively used by passing the flexible shield tube 120 having flexibility.

JP 2004-224156 A

In the wiring structure of the wire harness described above, the cable size of the

power cables

102U, 102V, and 102W continuously wired from the rear side to the front side engine room is determined by the ambient temperature and the energization value. Normally, the cable size will be determined depending on the ambient temperature in the engine room, and the heat dissipation and heat resistance of the shield pipe through which these power cables are inserted are determined depending on the ambient temperature in the engine room. Depends on the cable size. In other words, in the routing area below the floor, the ambient temperature is lower than the ambient temperature in the engine room, so the cable size can be lowered, for example, by one rank, and accordingly, the heat sink and heat resistance requirements for shield pipes are met. Can be lowered. However, as described above, since the cable is continuously wired, the cable size may be enlarged.

Further, in the routing area under the floor (hereinafter referred to as the underfloor), the wiring form of the wire harness is substantially the same because the underfloor is only routed in the front-rear direction of the automobile even for different vehicle types. On the other hand, if the vehicle type is different in the area routed on the rear side floor and in the front side engine room, the cable routing route is also different, and the cable exterior material is also different due to the difference in the routing route.
In other words, the rear side floor wiring area and the front side engine room are often different depending on the vehicle type, so conventionally, the rear side floor wiring area passes through the under floor wiring area and reaches the front engine room continuously. The assembled wire harness is assembled for each vehicle type. For this reason, there are problems that the manufacturing cost of the wire harness is high and the production is not efficient.

The present invention has been made in view of the above-described problems, and it is possible to easily assemble a wiring harness for an automobile in which a rear-side floor wiring area and a front-side engine room are continuously connected via a floor wiring area. It is possible to reduce the cost while suppressing the excessive increase in the size of the electric wire and to prevent the wire harness from becoming enlarged.

In order to solve the above-mentioned problem, the present invention is a wiring structure in which a wire harness is continuously routed in a front side engine room of an automobile, an intermediate part under floor area, and a rear side floor upper area.
The wire harness routed in the front side engine room, the middle part underfloor area, and the rear side floor area, respectively, is divided into three, or the middle part underfloor area, the rear side floor area, and the wires routed in the front engine room The harness is divided into two parts, and connection members are provided to connect these divided wire harnesses.
The wire harness in the intermediate underfloor region is a common underfloor wiring wire harness that is routed to a plurality of vehicle types, and the electric wires constituting the common underfloor wiring wire harness are inserted into pipes, while in the front engine room And the wiring harness that is routed to the rear floor area is a dedicated wiring harness for each vehicle, and
The electric wiring and exterior material of the common underfloor wiring wire harness and the electric wiring and exterior material of the front side and rear side floor wiring wire harnesses provide an automobile wiring structure that can be different.

The underfloor wiring wire harness that is inserted into the pipe described above can use a common wiring route with few elements that restrict the wiring route because the wire harness uses the underfloor wiring route even if the vehicle type is different. Therefore, the shape of the pipe can be made common and a common wire harness can be obtained. In this way, if the underfloor wiring wire harness can be shared by a plurality of vehicle types, the shape management of the pipes can be facilitated, the packaging form can be unified, and the cost can be greatly reduced.

The wire harness of the present invention is the same as in the conventional example described above, in a hybrid vehicle or an electric vehicle, three high-voltage electric wires that connect an inverter mounted on the rear side and a motor mounted in the engine room, or the rear side of the vehicle Can be suitably used in the case of two high-voltage electric wires that connect the battery mounted on the battery and the inverter in the engine room.

The common underfloor wiring wire harness is inserted through a shield pipe made of one metal pipe for each electric wire (high voltage cable). The common underfloor wiring wire harness is inserted through one shielded pipe for each electric wire. Therefore, when there are three high-voltage electric wires, three shielded pipes are wired in parallel, and these shielded pipes are It is attached to the floor via a support material. On the other hand, it is preferable that the rear-side and front-side engine room wiring wire harnesses of the dedicated wire harness are accommodated in an exterior material on the connection side with the common underfloor wiring wire harness.

The exterior material of the front side engine room and the rear side floor wiring wire harness is a shield braided tube formed by knitting metal wires in a mesh shape, a corrugated tube, a rubber boot, a resin mesh tube, a resin round tube, It is 1 or more types selected from a braided sheet and a resin sheet.
As the exterior material, for example, a shield braided tube formed by knitting the metal wire in a mesh shape is preferably used when connecting to a common underfloor wiring wire harness that is passed through a shield pipe. In that case, a plurality of electric wires drawn out from the shield pipe are inserted into one collective shield braided tube, and the outer periphery of the plurality of shield pipes is covered with the collective shield braided tube and fixed using a metal material. Thus, electrical connection is preferable.

Since the wiring harness on the front side engine room and on the rear side floor is a dedicated wiring harness according to the vehicle type, the exterior material on the front side engine room and the rear side can be made different, and the specific vehicle type and other The exterior material in the front engine room and the rear exterior material can be interchanged depending on the vehicle type. *

For example, the exterior material of the rear side floor wiring wire harness may be the shield braided tube and the exterior material of the front side engine room wiring wire harness may be a corrugated tube.
The rear floor wiring wire harness is covered with a grommet and covered with rubber boots continuously provided on the grommet, while the front side engine room wiring wire harness is covered with a corrugated tube and a resin mesh tube. It may be packaged.
Further, the rear-side floor wiring wire harness may be externally covered with a corrugated tube, while the front-side engine room wiring wire harness may be externally provided with a grommet and may be externally provided with rubber boots provided continuously to the grommet.

The wire diameter of the electric wire of the common underfloor wiring wire harness is smaller than the electric wire diameter of the electric wire of the wiring wire harness in the front side engine room, or / and the heat resistance temperature of the electric wire of the common underfloor wiring wire harness is the front It is preferable that it is lower than the heat resistance temperature of the electric wire of the wiring wire harness in the side engine room.
This is because the engine room has a high ambient temperature, and therefore, the wires that are routed in the engine room are wires that have a higher heat resistance temperature than the wires of the wire harness that are routed under the floor, and / or wires that have a larger wire diameter. In other words, the electric wire of the wire harness arranged under the floor has a small electric wire size and a small diameter of the pipe through which the electric wire is inserted.
As described above, in the present invention, at least different types of electric wires having different heat resistant temperatures are connected and continuously wired as wires wired in regions having different heat resistant temperatures required due to different atmospheric temperatures. . Thereby, the problem that the weight and the cost are increased by wiring the wires having an excessive heat-resistant temperature is solved.

Specifically, the heat resistance temperature of the electric wire of the common underfloor wiring wire harness is 80 ° C. or more, and the electric wire is a single core wire, stranded wire or enameled wire covered with an insulating resin. On the other hand, it is preferable that the electric wire wired in the engine room has a heat-resistant temperature of 120 ° C. or higher and is not a single core wire but a flexible stranded wire.
This is because the wires in the underfloor wiring are arranged in a straight line, so a relatively rigid single-core wire or enameled wire may be used, and the wires to be wired in the engine room are bent and wired. It is because it is preferable to use a flexible twisted wire instead of a single core wire.

As the electric wire having a relatively low heat-resistant temperature to be wired under the floor, an aluminum-based metal single core wire is preferably used, and as an electric wire having a relatively high heat-resistant temperature to be arranged in the engine room, an aluminum-based metal twisted wire is used. Wire wires are preferred.
As described above, when the electric wire for the underfloor wiring is an aluminum-based metal single core wire, the weight can be reduced and the space can be reduced.
The aluminum-based metal single-core wire can reduce the weight per unit length by 60 to 70% and the outer diameter of about 20% compared to a conventional wire made of stranded copper-based metal wire. Can be reduced. In addition, any electric wire is not limited to an aluminum-type electric wire, You may use a copper wire.

Since the electric wires to be wired on the rear side floor do not become a high-temperature atmosphere unlike the front side engine room, the same electric wires as the under-floor wiring area may be used. Therefore, the same electric wire may be used for the electric wires in the rear side floor upper region and the under floor wiring region. And, the same electric wire is provided continuously from the rear side floor wiring area to the under floor wiring area, and the wire harness is wired in the front side engine room and its exterior material, as described above, The wire harness may be divided into two parts.

In the connection part of the three or two divided wire harnesses, it is necessary to connect the electric wires. The connection between these wires is selected from welding between the core wires of the wires, crimping using an intermediate crimp terminal, terminal connection using a connector, bolt fastening, cold / hot pressure welding, soldering, and
The welding connection is any one of ultrasonic welding, friction welding, resistance welding, arc welding, laser welding, electron beam welding, high frequency welding, and plasma welding.
As described above, any means can be used as long as it can connect the wires, but ultrasonic welding or resistance welding can be easily performed and can be made inexpensive, and the connecting portion is not enlarged and is also space-saving. It is advantageous. The connection part between the electric wires of the divided wire harness may be either under the floor or on the floor.

As described above, in the present invention, the underfloor wiring wire harness that can share the wiring form with the same wiring route is shared by a plurality of vehicle types, and at least the front side engine room in which the wiring route is different when the vehicle types are different. The internal wiring harness is dedicated to each vehicle type. Therefore, it is possible to efficiently manufacture a wire harness that continuously routes the rear side and the front side engine room via the intermediate floor routing region and reduce the manufacturing cost.
And since the wire harness is divided | segmented, it can be set as the electric wire size according to the atmospheric temperature of a wiring area | region, and the enlargement of an electric wire and a wire harness can be suppressed.

It is explanatory drawing which shows the wiring structure of the electric wire of 1st embodiment of this invention. It is the schematic of the state which wired the wire harness of the said embodiment to the motor vehicle. It is drawing which shows the connection state of the separated wire harness, (A) is a schematic side view, (B) is a BB sectional view of (A), (C) is a CC sectional view of (A). , (D) is a sectional view taken along line DD of (A). (A) (B) is the schematic which shows the other connection form of electric wires. It is explanatory drawing which shows 2nd embodiment of this invention. (A) (B) is drawing which shows a prior art example.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
The vehicle in which the wire harness of the present embodiment is routed is a hybrid vehicle, and as shown in FIG. 1, it is routed in hybrid vehicles A, B, and C of different vehicle types.

As shown in FIG. 2, the hybrid vehicles A, B, and C are all connected from the rear side to the front side to connect the inverter 1 mounted on the rear floor and the motor 2 mounted in the front engine room. Rear-side floor wiring wire harness W / H-1 (hereinafter abbreviated as rear-side wire harness W / H-1), intermediate floor wiring wire harness W / H-2 (hereinafter referred to as floor-under-shared wire harness) W / H-2), front side engine room wiring wire harness W / H-3 (hereinafter abbreviated as front side wire harness W / H-3), and these three divided wires The harness is connected sequentially.

The rear side wire harness W / H-1 and the front side wire harness W / H-3 are manufactured as different dedicated wire harnesses for different vehicle types A, B, C, while the underfloor common wire harness W / H-2 is a common wire harness that can be shared by multiple models A, B, and C.

Each of the three divided wire harnesses is composed of three high-voltage electric wires 10 (10A, 10B, 10C). That is, the rear side wire harness W / H-1 includes the electric wires 10A1, 10B1, and 10C1. The front side wire harness W / H-3 includes electric wires 10A3, 10B3, and 10C3. The underfloor common wire harness W / H-2 includes electric wires 10A2, 10B2, and 10C2. The electric wires 10A1, 10A2, and 10A3 are sequentially connected to form one circuit wire, the electric wires 10B1, 10B2, and 10B3 are sequentially connected to form one circuit wire, and the electric wires 10C1, 10C2, and 10C3 are sequentially connected to form one circuit. The electric wire.

The electric wires W1 of the electric wires 10A1 to 10C1 of the rear side wiring harness W / H-1, the electric wires W2 of the electric wires 10A2 to 10C2 of the underfloor common wiring harness W / H-2, and the front side wiring harness W routed in the engine room. The electric wires W3 of the / H-3 electric wires 10A3 to 10C3 are different.
The electric wires W1 and W2 cover a single core wire made of an aluminum-based metal having a heat resistance temperature of 80 ° C. or higher and lower than 200 ° C. with an insulating resin.
On the other hand, the electric wire W3 routed in the engine room has a core wire made of a twisted strand of an aluminum-based metal having a heat resistant temperature of 120 ° C. or higher covered with an insulating resin.
In the present embodiment, wires having a core wire cross-sectional area of 12 sq are used as the wires W1 and W2, and wires having a core wire cross-sectional area of 15 sq are used as W3.

The three electric wires 10A2 to 10C2 constituting the underfloor common wire harness W / H-2 are respectively inserted into the shield pipes 11 (11A, 11B, 11C). As described above, since the wire diameters of the wires 10A2 to 10C2 are set to be small, the diameter of each shield pipe 11 can be reduced, and the weight can be reduced correspondingly. These three shield pipes 11 are arranged in parallel and attached to the lower surface of the floor 3 with a support material (not shown).
The shield pipe 11 is made of an aluminum-based metal to reduce the weight.

Since this underfloor wiring wire harness is a wire harness shared by a plurality of vehicle types, the shape of the shield pipe 11 is set so as to take a wiring route in which there is no obstacle in the shared vehicle types. For example, as shown in FIG. 1, each shield pipe 11 is provided with a bypass location 11 x that bypasses the installation position of the fuel tank that protrudes below the floor 3.

As shown in FIG. 1, in the vehicle A, the three electric wires 10A1 to 10C1 of the rear side wire harness W / H-1 are arranged in a shield braided tube 6 knitted with metal fibers. It is inserted. One end of the shield braided tube 6 is put on one end of three shield pipes 11 of the exterior material of the underfloor common wire harness W / H-2 and is connected and fixed by a metal stopper. The other end of the shield braided tube 6 is connected and fixed to a metal earth pipe 7 for connecting an earth wire with a metal stopper. The electric wires 10A1 to 10C1 drawn from the tip of the earth pipe 7 are connected to the inverter 1 installed on the rear floor.

In the vehicle type A, the three electric wires 10A3 to 10C3 of the front side wire harness W / H-3 are inserted through a corrugated tube 8 made of a resin molded product as shown in FIG. Since the corrugated tube 8 is excellent in flexibility, it is suitable for routing while bending a narrow routing route in the engine room. The one end side of the corrugated tube 8 is fastened with a fastening band to the outer periphery where the three electric wires 10A3 to 10C3 are converged, or an adhesive tape is wound around and fixed. The three electric wires 10 A 3 to 10 C 3 are drawn from the other end of the corrugated tube 8 and connected to the motor 2.

In the vehicle type A, as described above, the rear side wire harness W / H-1 and the front side wire harness W / H-3 are manufactured as dedicated wire harnesses, while the intermediate underfloor common wire harness W / H-2 is manufactured. Uses a wire harness shared with other vehicle types (vehicles B and C).

The three-piece wire harnesses are connected in advance so as to become one continuous wire harness before being routed to the vehicle A. That is, one end of the electric wire W1 of the rear side wire harness W / H-1 and one end of the electric wire W2 of the underfloor common wire harness W / H-2, the other end of the electric wire W2, and the electric wire of the front side wire harness W / H-3 One end of W3 is connected to each other to form one continuous electric wire.
When the connection of the divided wire harness is a connector connection, the divided wire harness may be connected to the connector at the time of wiring in the vehicle A.

Specifically, as shown in FIGS. 3A to 3D, the electric wires W1 and W2 are stripped of the

insulation

21 and 31 coating on the terminal side to be connected to each other to expose the

core wires

22 and 32, The

core wires

22 and 32 are superposed and connected by ultrasonic welding.
A heat-shrinkable tube 14 is placed on the connection part 13 that has been ultrasonically welded to cause heat-shrink, thereby ensuring insulation of the exposed connection part. A grommet 19 is fitted on the outer periphery of the heat shrinkable tube 14.

As shown in FIG. 4A, the electric wire W1 and the electric wire W2 may be connected by crimping using an intermediate crimping terminal 40. Further, as shown in FIG. 4B, using a connector (not shown), the terminals T1 and T2 connected to the ends of the electric wire W2 and the electric wire W1 are crimped, and these are accommodated in the connectors, respectively. The terminals T1 and T2 may be connected by fitting. Moreover, you may connect by bolt fastening.
Further, instead of the ultrasonic welding of the above embodiment, the core wires exposed at the ends of the electric wires W1 and W2 are overlapped, and resistance welding, friction welding, arc welding, laser welding, electron beam welding, high frequency welding, plasma welding are performed. May be performed. Moreover, soldering may be applied and connected.
The connection between the electric wires W2 and W3 is also performed in the same manner as the connection between the electric wires W1 and W2.

In the vehicle B shown in FIG. 1, a corrugated tube 50A made of a resin molded product is externally mounted on the rear side wire harness W / H-1, and a grommet 51A to be fitted in the through hole of the floor 3 is further externally mounted on the grommet 51A. The continuous rubber boot 51a is continued to the tip of the corrugated tube 50A. The front-side wire harness W / H-3 has a shield braided tube 60 made of metal fiber covered on the electric wire W3 and a corrugated tube 50B on the outer periphery thereof.
In the vehicle B, the rear side wire harness W / H-1 and the front side wire harness W / H-3 are respectively manufactured as dedicated wire harnesses, and are connected to the underfloor common wire harness W / H-2 in the same manner as the vehicle A. And one continuous wire harness is comprised.

In the vehicle C shown in FIG. 1, only the corrugated tube 50C made of a resin molded product is externally mounted on the rear side wire harness W / H-1. The front-side wire harness W / H-3 has the same configuration as that of the rear-side wire harness of the vehicle B. The corrugated tube 50D is externally mounted, and the grommet 51B to be mounted in the through hole of the floor 3 is externally mounted. A rubber boot 51a that is continuous with the corrugated tube 50D is continuous with the tip of the corrugated tube 50D.
In the vehicle C, the rear side wire harness W / H-1 and the front side wire harness W / H-3 are respectively manufactured as dedicated wire harnesses, and are connected to the underfloor common wire harness W / H-2 in the same manner as the vehicle A. And one continuous wire harness is comprised.

Thus, in the different vehicles A, B, and C, in the area where the electric wire W2 is inserted into the shield pipe 11 in the underfloor wiring portion, the underfloor common wire harness W / H-2 is used, so there is no need to newly provide it. On the other hand, the rear side and front side wire harnesses W / H-1 and W / H-3 are newly provided as dedicated wire harnesses according to the conditions of the vehicles A, B, and C, respectively.

As described above, by dividing the wire harness in which the rear inverter 1 and the engine room motor 2 are continuously provided through the underfloor wiring area into three parts, the underfloor wiring area easily unifies the wiring route of the wire harness. It can be shared by multiple models.
In the underfloor wiring area as the common wire harness, each electric wire W2 is inserted through the shield pipe 11, and if manufactured as a dedicated product, the shape management of the shield pipe is not easy. Becomes easy. In addition, parts (clamps, stays, etc.) used for the common wire harness can be shared, and further, the packaging form is unified, so that the cost can be greatly reduced.

In addition, since the front side wire harness W / H-3 made of the electric wire W3 wired in the engine room and the underfloor common wire harness W / H-2 made of the electric wire W2 wired under the floor are manufactured separately, W2 And W3 can be different types of electric wires. Therefore, the diameter of the electric wire W2 to be wired under the floor can be reduced, and the diameter of the shield pipe 11 can also be reduced, so that the weight can be reduced accordingly.

FIG. 5 shows a second embodiment.
In the second embodiment, the rear side wire harness W / H-1 and the underfloor common wire harness W / H-2 are formed as one wire harness W / H-5, and are wired in the engine room. Harness W / H-3 is a separate wire harness, and the wire harness is divided into two.
This is because the electric wire W1 of the rear side wire harness and the electric wire W2 of the underfloor common wire harness can be made into a continuous electric wire.
As described above, when the wire harness W / H-5 in which the electric wires arranged on the rear side floor and the electric wires arranged below the floor are continuous is provided, there is an advantage that a connection portion between the electric wires can be eliminated.

The present invention is not limited to the above-described embodiment, and both the electric wire W2 to be wired under the floor and the electric wire W3 to be wired in the engine room may be core wires made of a copper-based metal that is conventionally used.
Moreover, you may connect the battery mounted in the rear side of a vehicle, and the inverter in an engine room with two electric wires.

DESCRIPTION OF SYMBOLS 1 Inverter 2 Motor 3 Floor 10A1-10C3 Electric wire 11 (11A, 11B, 11C) Shield pipe 13 Connection part W1, W2 Electric wire W / H-1 Rear side wire harness W / H-2 Underfloor common wire harness W / H-3 Front side wire harness

Claims

A wiring structure in which a wire harness is continuously routed in a front side engine room of an automobile, a middle part under floor area, and a rear side floor area,
The wire harness routed in the front side engine room, the middle part underfloor area, and the rear side floor area, respectively, is divided into three, or the middle part underfloor area, the rear side floor area, and the wires routed in the front engine room The harness is divided into two parts, and connection members are provided to connect these divided wire harnesses.
The wire harness in the intermediate underfloor region is a common underfloor wiring wire harness routed to a plurality of vehicle types, and the electric wires constituting the common underfloor wiring wire harness are inserted into a pipe, while in the front side engine room And the wiring harness that is routed to the rear floor area is a dedicated wiring harness for each vehicle, and
The wiring structure of the automobile in which the electric wire and the exterior material of the common underfloor wiring wire harness and the electric wire and the exterior material of the front and rear floor wiring wire harnesses can be different.
The common underfloor wiring wire harness is inserted into a shield pipe made of one metal pipe for each electric wire, while the rear and front engine room wiring wire harnesses serving as the dedicated wire harness are The wiring structure for an automobile according to claim 1, wherein the wiring structure is housed in an exterior material on the side connected to the common underfloor wiring wire harness.
The exterior material of the wiring harness on the front side engine room and on the rear side floor is a shield braided tube formed by knitting metal wires in a mesh shape, a corrugated tube of a resin molded product, a rubber boot, a resin mesh tube, a resin The automobile wiring structure according to claim 1 or 2, wherein the wiring structure is at least one selected from a round tube, a braided sheet, and a resin sheet.
The electric wire of the common underfloor wiring wire harness is a different type of electric wire having a smaller wire diameter and / or lower heat-resistant temperature than the electric wire routed in the front side engine room. The wiring structure of the automobile according to claim 1.
In the hybrid vehicle or electric vehicle, the wire harness includes three high-voltage wires that connect an inverter mounted on the rear side and a motor mounted in the front engine room, or a battery mounted on the rear side of the vehicle and the front side. The wiring structure for an automobile according to any one of claims 1 to 4, comprising two high-voltage electric wires that connect an inverter in an engine room.