JP6052206B2 - Rear structure of the vehicle - Google Patents

Description

  The present invention relates to a rear structure of a vehicle such as a hybrid vehicle in which a generator and an engine for driving the generator are provided at the rear of the vehicle.

  For example, Patent Document 1 discloses a rear structure of a series hybrid vehicle in which a generator, an engine that drives the generator, and a fuel tank are disposed below a rear floor panel of the vehicle. Yes. The engine is a two-cylinder small reciprocating engine and is disposed below the rear seat. The generator is disposed behind the engine, and the fuel tank is disposed on the side of the engine.

JP 2011-73580 A

  In a structure in which an engine and a generator are mounted on the rear side of the vehicle, it is desirable that the engine and the generator function as a protective member for the fuel tank in the event of a collision (rear collision) from the rear of the vehicle. Regarding the conventional structure disclosed in Patent Document 1, as described above, the generator is disposed behind the engine, and the fuel tank is protected by receiving a collision load by the generator.

  However, in the structure of Patent Document 1, since the generator protrudes rearward with respect to the engine and the fuel tank, for example, in the case of a slight offset rear impact, the generator moves to the front side of the vehicle. On the other hand, it is conceivable to press the fuel tank. In addition, at the time of rear collision, the generator functions as a protective member for the fuel tank, but the functionality of the engine as the protective member is low. Furthermore, since the space occupied by the engine and the generator in the longitudinal direction of the vehicle is relatively large, for example, it may be difficult to apply in a hatchback type small vehicle having a relatively small area of the rear floor panel.

  The present invention has been made in view of the above circumstances, and provides a rear structure of a vehicle that can protect a fuel tank to a higher degree while arranging a generator, an engine, and the like more compactly. With the goal.

  In order to solve the above-described problems, the present invention provides a rear structure of a vehicle including a generator and an engine that drives the generator, and a pair of left and right rear side frames that extend in the front-rear direction at the rear of the vehicle, and the rear side frames. A power generation unit including a cross member that extends in the vehicle width direction and is connected to both rear side frames, and the generator, the engine, and a frame member that is assembled so that the engine and the generator are arranged side by side. A fuel tank in which fuel for driving the engine is housed, and the power generation unit is assembled to the cross member via the frame member in a state where the generator and the engine are aligned in the vehicle width direction. Tanks are arranged in a row in the vehicle width direction along with the generator and engine A.

  According to this structure, since the engine, the generator, and the fuel tank are arranged in a line in the vehicle width direction, both the engine and the generator effectively function as a protective member for the fuel tank at the time of rear collision of the vehicle. In particular, since a single rigid power generation unit is constructed by assembling the engine and the generator to the frame member, and the power generation unit is assembled to the cross member, it receives a large impact (rear impact) load. It is possible to provide a higher degree of protection for the fuel tank. Moreover, since the engine, the generator, and the fuel tank are arranged in a line in the vehicle width direction, the engines and the like can be concentrated in the vehicle front-rear direction and arranged compactly.

  In the rear structure of the vehicle as described above, it is preferable that the fuel tank is assembled to the cross member.

  According to this structure, the power generation unit (engine and generator) and the fuel tank can behave in the same manner at the time of a rear collision, so that the influence on the fuel tank alone can be mitigated, and the engine and fuel It is possible to prevent inconveniences such as the fuel hose dropping off (discharging fuel) due to the individual displacement of the tank.

  In the rear structure of the vehicle, the power generation unit is disposed on one side of the fuel tank in the vehicle width direction, and an inverter that converts the power generated by the generator into charging power is disposed on the other side. It is preferred that

  According to this structure, since the power generation unit and the inverter, which are relatively heavy objects, are separately arranged on both sides of the fuel tank, the weight balance in the vehicle width direction greatly fluctuates as the fuel increases or decreases. Is suppressed. Therefore, it is possible to ensure good running stability.

  In the rear structure of the vehicle, it is preferable that a silencer for suppressing exhaust noise of the engine is disposed behind the fuel tank.

  According to this structure, since the silencer functions as a buffer member at the time of rear collision, the fuel tank can be protected to a higher degree at the time of rear collision.

  In this case, the engine, the generator, and the fuel tank are arranged in this order along the vehicle width direction, and an exhaust pipe that guides the exhaust of the engine to the rear of the vehicle is provided. The silencer extending in the vehicle width direction from the rear position of the generator to the rear position of the fuel tank, and the exhaust purification device disposed at the front position of the engine, and exhausted from the engine and It is preferable that the exhaust gas purified by the exhaust gas purification device is guided to the silencer via a position below the generator.

  According to this structure, the cooling of the exhaust pipe (exhaust gas) is promoted by the traveling wind, and the exhaust pipe is not routed in front of the fuel tank. Radiant heat is reduced. Therefore, it is possible to effectively suppress the fuel tank from being damaged by the radiant heat.

  As described above, according to the rear structure of the vehicle of the present invention, the fuel tank can be more highly protected while the generator, the engine, and the like are arranged more compactly.

1 is a schematic configuration diagram of a vehicle to which a rear structure of a vehicle according to the present invention is applied. It is a schematic side view which shows the whole structure of the said vehicle. It is a schematic plan view which shows the rear part structure of the said vehicle (state including a cross member). It is a schematic plan view which shows the rear part structure of the said vehicle (cross member omission state). It is a schematic bottom view which shows the rear part structure of the said vehicle (insulator omission state). It is a perspective view which shows a frame member. It is sectional drawing which shows the assembly | attachment structure of the electric power generation unit with respect to a unit frame. It is a schematic bottom view which shows the rear part structure of the said vehicle (insulator mounting state).

  Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings. In the following description, “front”, “rear”, “left”, and “right” are based on the front, rear, left and right of the vehicle (direction indicators shown in the figure).

<Schematic configuration of vehicle>
FIG. 1 shows a schematic configuration of a vehicle to which a rear structure of the vehicle according to the present invention is applied. This vehicle is a five-seater hatchback type hybrid vehicle (see FIG. 2), more specifically, a series hybrid vehicle.

  As shown in the figure, this vehicle charges a generator unit 1 including a generator 3 and an engine 2 for driving the generator 3, an inverter 6, and electric power generated by the generator 3 via the inverter 6. For example, a large-capacity battery 7 made of, for example, a lithium ion battery, a motor 8 that rotationally drives drive wheels (front wheels 9 a) by electric power supplied from the battery 7 via the inverter 6, and the engine 2. And a fuel tank 5 for containing fuel. That is, the vehicle 8 travels by driving the motor 8 using power previously charged in the battery 7 when traveling at a short distance, and the motor 8 is generated when the vehicle is decelerated. The regenerative power is charged in the battery 7. When the electric capacity of the battery 7 decreases to a certain value or less during long-distance traveling or the like, the generator 3 is driven by the engine 2 and the generated power is supplied to the battery 7 for charging. Although not shown, the vehicle includes a charging plug capable of charging the battery 7 with a normal charger as a household power source, a quick charger installed in a parking area, or the like. It may be a thing.

<Overall structure of vehicle>
As shown in FIG. 2, the vehicle includes a dash panel 11 installed in a front portion of a passenger compartment 10, a front floor panel 12 installed so as to extend from a lower end portion of the vehicle to the rear side of the vehicle, and the front floor. A kick-up portion 13 provided so as to rise from the rear end portion of the panel 12 and a rear floor panel 14 extending rearward from the upper portion of the kick-up portion 13 are provided. A front row seat 15 including a driver seat and a passenger seat is installed on the front floor panel 12, and a rear row seat 16 is provided on the rear floor panel 14 on the rear side.

  A pair of left and right rear side frames 18 extending in the front-rear direction are installed behind the kick-up portion 13 along the lower surface of the rear floor panel 14. Specifically, the rear side frames 18 include a front horizontal portion 18a that extends horizontally from the kick-up portion 13 toward the rear of the vehicle, an inclined portion 18b that extends obliquely rearward and upward from a lower position of the rear row seat 16, and a rear row seat 16 And a rear horizontal portion 18b extending horizontally from the rear position to the rear of the vehicle. Between the rear side frames 18, a front cross member 20 joined to the rear surface of the kick-up portion 13 and extending in the vehicle width direction, a vehicle below the rear floor panel 14 and behind the rear row seat 16. A rear cross member 21 extending in the width direction is installed.

  A rear side of the rear cross member 21 is provided with a unit frame 24 which extends between the rear side frames 18 in the vehicle width direction and is fixed to the rear side frame 18. The unit frame 24 includes the power generation unit. 1. A fuel tank 5 and an inverter 6 are assembled.

  FIG. 3 is a plan view showing the rear structure of the vehicle, more specifically, the rear structure of the vehicle with the rear floor panel 14 removed. FIG. 6 is a perspective view of the unit frame 24 (a perspective view of the unit frame 24 turned upside down). As shown in FIGS. 3 and 6, the unit frame 24 is generally H-shaped in plan view, and includes a first sub cross member 25 extending in the vehicle width direction at a position between the rear wheels 9b, and a rear wheel. A second sub cross member 26 extending in the vehicle width direction at the rear position of 9b, and extending in the front-rear direction at a position slightly to the right of the center in the vehicle width direction, and joined (welded) to both sub cross members 25, ), And a connecting frame 27 that connects the sub-cross members 25 and 26 together. Each of the sub-cross members 25 and 26 and the connecting frame 27 has a closed cross-sectional structure (see FIG. 7).

  Fixing flange portions 25a and 26a are formed at both ends in the longitudinal direction (both ends in the vehicle width direction) of the sub cross members 25 and 26, respectively, and these flange portions 25a and 26a are provided on the rear side frame 18 with a welt bolt. The unit frame 24 is fixed to the lower side of the rear side frame 18 by being fastened to the rear side frame 18 with a nut (not shown). The power generation unit 1, the fuel tank 5, the inverter 6, and the like are assembled below the unit frame 24. In this example, the sub cross members 25 and 26 of the unit frame 24 correspond to the cross members of the present invention.

  FIG. 4 is a plan view showing the rear structure of the vehicle with the unit frame 24 omitted. As shown in the figure, the power generation unit 1 includes an engine 2, a generator 3, and a frame member 4 that is assembled in a state where they are arranged side by side.

  The engine 2 is a single-rotor small rotary engine. An intake pipe 42 and an exhaust pipe 46 described later are connected to the engine 2.

  Although not shown in detail, the engine 2 includes a pair of upper and lower side housings, a rotor housing (center housing) interposed between the pair of side housings, and a vertically flat rotor formed by these housings. A rotor accommodated in the accommodation chamber and an eccentric shaft extending in the vertical direction are included. Then, the rotational force of the rotor generated by the intake, compression, combustion (expansion) and exhaust strokes in the three working chambers formed between the inner surface of the trochoid in the rotor accommodating chamber and the rotor, It is configured to be taken out from an eccentric shaft that is an output shaft.

  In this example, the engine 2 is arranged so that the eccentric shaft extends in the vertical direction. This is due to the following reason. That is, when the rotary engine is used as a traveling engine, it is necessary to transmit driving force to the wheels via a transmission or the like. Therefore, the engine has a posture in which the eccentric shaft extends in the horizontal direction (referred to as horizontal installation for convenience). ) Mounted on the vehicle. However, since the engine 2 is an engine for driving the generator 3, it is not always necessary to place the engine 2 horizontally. The engine 2 is a single-rotor small rotary engine as described above, and the engine 2 has a flat structure in the axial direction of the eccentric shaft. Therefore, in order to reduce the floor of the rear floor panel 14 while effectively utilizing the space below the rear floor panel 14, the engine 2 is incorporated in the vehicle with a posture in which the eccentric shaft extends in the vertical direction (referred to as vertical installation for convenience). Yes.

  The engine 2 is fixed to the frame member 4 via the upper side. As shown in FIGS. 4 and 6, the frame member 4 is a metal plate-like member elongated in the vehicle width direction, and the engine 2 is positioned at one end side in the longitudinal direction of the frame member 4 (in FIG. It is fixed at the position of the side. Specifically, the engine 2 is fixed to the frame member 4 by fixing the upper side housing of the engine 2 to the lower surface of the frame member 4 with bolts and nuts.

  The generator 3 is fixed to the frame member 4 so as to be adjacent to the engine 2 along the longitudinal direction of the frame member 4. Specifically, the generator 3 is fixed to the frame member 4 by fixing a flange portion formed in the casing of the generator 3 to the lower surface of the frame member 4 with bolts and nuts.

  The output shaft of the generator 3 and the eccentric shaft of the engine 2 are connected to each other at a position below the generator 3 and the engine 2 via a sprocket, a chain, etc. (not shown). It is driven by.

  In addition, although illustration is abbreviate | omitted, the casing of the generator 3, the rotor housing of the engine 2, and the lower side housing are connected suitably via the stay for connection. Thereby, the highly rigid power generation unit 1 in which the engine 2 and the generator 3 are firmly integrated is constructed.

  As shown in FIGS. 3, 4, 6, and 7, the power generation unit 1 is arranged such that the generator 3 is located at the center in the width direction of the vehicle and the engine 2 is located on the right side of the vehicle. The unit frame 24 is assembled through a mount 30. Specifically, flange portions 4a are integrally formed around the frame member 4 of the power generation unit 1, specifically on both front and rear sides of the assembly position of the engine 2 and on the left side of the assembly position of the generator 3. The mount 30 is fixed to the flange portions 4a with bolts B2. The mounts 30 are fastened to the sub-cross members 25 and 26 and the connection frame 27 by the welt bolts B1 and nuts N1 provided on the sub-cross members 25 and 26 and the connection frame 27 of the unit frame 24. The power generation unit 1 (frame member 4) is assembled to the unit frame 24. Specifically, among the flange portions 4 a of the frame member 4, the flange portion 4 a at the front of the engine body is the first sub cross member 25, the flange portion 4 a at the rear of the engine body is the second sub cross member 26, and the left side of the generator 3. One flange portion 4 a is assembled to the connection frame 27 via the mount 30. As a result, the power generation unit 1 is assembled to the unit frame 24 from below and supported by the unit frame 24.

  Each mount 30 has the same structure, and as shown in FIG. 7, a shaft-like fastened portion 30a fastened to the unit frame 24 and a cylindrical shape fastened on the outer peripheral surface of the fastened portion 30a. An elastic member 30b and a unit fixing portion 30c that is externally fitted to the elastic member 30b and to which the power generation unit 1 (frame member 4) is fixed. Thereby, the unit fixing | fixed part 30c can be elastically displaced moderately with respect to the to-be-fastened part 30a. That is, when the power generation unit 1 is assembled to the unit frame 24 via the mount 30, the vibration of the power generation unit 1 accompanying the operation of the engine 2 or the generator 3 is transmitted to the vehicle interior via the unit frame 24 or the like. It is suppressed.

  The engine 2 includes an intake port in the rotor housing and an exhaust port in the lower side housing. That is, the engine 2 has a so-called peripheral intake and side exhaust engine structure in which the intake port is a peripheral port (periport) and the exhaust port is a side port. The intake port opens on the front side surface of the rotor housing. The exhaust port opens on the front side surface of the lower side housing at a position on the right side of the intake port. As a result, the intake pipe 42 is connected to the front side of the rotor housing of the engine 2 and the exhaust pipe 46 is connected to the front side of the lower side housing, as shown in FIGS. ing.

  The intake pipe 42 extends in the vehicle width direction along the first sub cross member 25 of the unit frame 24 at a position in front of the generator 3. An air cleaner 43 a is provided at the end of the intake pipe 42, and a throttle body 43 b is interposed in a predetermined position between the air cleaner 43 a and the engine 2 in the intake pipe 42. The air cleaner 43a is fixed to a bracket 54 (see FIGS. 5 and 6) joined to the lower surface of the first sub cross member 25 of the unit frame 24, and the throttle body 43b is fixed to the first sub cross member 25. The cross member 25 is fixed at a predetermined position.

  The exhaust pipe 46 is disposed below the intake pipe 42. As shown in FIG. 5, the exhaust pipe 46 is disposed in front of the engine 2 and extends in the vehicle width direction along the intake pipe 42 to a position substantially in front of the generator 3. The device 47a and a silencer 47b that is disposed behind the fuel tank 5 to be described later and suppresses the exhaust noise of the engine 2 and that is exhausted from the engine 2 and purified by the exhaust gas purification device 47a, The silencer 47b is guided through the lower position of the generator 3. The exhaust purification device 47a and the silencer 47b are supported by the sub-cross members 25 and 26 via rubber hangers, brackets and the like not shown.

  Then, the fuel tank 5 and the inverter 6 are arranged in order from the power generation unit 1 side so as to be lined up side by side with the power generation unit 1, that is, in a line with the engine 2 and the generator 3 in the vehicle width direction. These fuel tanks 5 and the inverter 6 are fixed to the lower surface of the unit frame 24.

  As shown in FIGS. 4 and 5, the fuel tank 5 has a shape almost similar to a cube. The fuel tank 5 is fixed to the unit frame 24 via front and rear brackets 50 and 51 (see FIG. 6) joined to the lower surfaces of the sub-cross members 25 and 26 of the unit frame 24, respectively. That is, a flange portion 5a is formed over the entire circumference of the side surface of the fuel tank 5 at an intermediate portion in the vertical direction. Then, the fuel tank 5 is inserted between the brackets 50 and 51, and the flange portion 5a is overlapped with the ends (lower ends) of the brackets 50 and 51. 51 is fastened with bolts and nuts. Accordingly, the fuel tank 5 is fixed to the unit frame 24 via the brackets 50 and 51.

  A fuel supply pipe 5 b is connected to the front left corner portion of the upper surface of the fuel tank 5. The end of the fuel supply pipe 5b is connected to a fuel filler unit 5c fixed to the vehicle body. That is, the fuel tank 5 can be refueled by removing the fuel cap, not shown, of the fuel filler unit 5c.

  Of the brackets 50 and 51 to which the fuel tank 5 is fixed, the bracket 50 located on the rear side of the vehicle is in the vehicle width direction along the second sub cross member 26 as shown in FIGS. The fuel tank 5 is shielded from the silencer 47b by being interposed between the fuel tank 5 and the silencer 47b and blocking them. That is, the bracket 50 also functions as a heat shield member that blocks radiant heat from the silencer 47b.

  The inverter 6 has a substantially rectangular parallelepiped shape and is arranged on the left side of the fuel tank 5. As shown in FIG. 6, the inverter 6 is supported from below by a bracket 52 fixed to the second sub cross member 26 and the bracket 50 so as to straddle the second sub cross member 26 and the bracket 50. The bolts and nuts are fixed to a mounting portion (not shown) provided on the rear side frame 18. In addition, the code | symbol 6a in FIG. 6 is the power transmission cable which connects the inverter 6 and the generator 3. FIG.

<Operational effect of the rear structure of the vehicle>
According to the rear structure of the vehicle body described above, the engine 2, the generator 3 and the fuel tank 5 are arranged in a line in the vehicle width direction. 5 functions effectively as a protective member. In particular, since a single rigid power generation unit 1 is constructed by assembling the engine 2 and the generator 3 to the frame member 4, the power generation unit 1 is assembled to the cross member. It is possible to receive a load), so that the fuel tank 5 can be protected to a higher degree.

  Further, according to the above structure in which the engine 2, the generator 3, and the fuel tank 5 are arranged in a line in the vehicle width direction, the engine 2 and the like can be concentrated in the vehicle front-rear direction and arranged compactly. Therefore, as shown in FIG. 2, even if the rear floor panel 14 is a hatchback type vehicle having a relatively narrow front-rear direction, the engine 2 and the like can be arranged without difficulty in a relatively small space below the rear floor panel. Therefore, according to the rear structure of the vehicle, the fuel tank 5 can be highly protected while the engine 2 and the generator 3 are arranged in a compact manner.

  Further, according to the rear structure of the vehicle, the fuel tank 5 is assembled to the sub cross members 25 and 26 of the unit frame 24 in the same manner as the power generation unit 1 (engine 2 and generator 3). The power generation unit 1 and the fuel tank 5 can be caused to behave in the same manner, whereby the influence on the fuel tank 5 alone can be reduced. Further, there is an advantage that it is possible to prevent inconveniences such as the engine 2 and the fuel tank 5 being individually displaced and the fuel hose dropping off (fuel leakage occurs).

  Further, according to the rear structure of the vehicle, the power generation unit 1 is disposed on one side (right side) in the vehicle width direction with the fuel tank 5 interposed therebetween, and the inverter 6 is disposed on the other side (left side). The weight balance in the vehicle width direction is suppressed from greatly fluctuating as the fuel in the fuel tank 5 increases or decreases. That is, if the power generation unit 1, the inverter 6 and the fuel tank 5 are arranged in this order in the vehicle width direction, the power generation unit 1 and the inverter 6 are relatively heavy, If the capacity decreases, the weight may be biased to one side in the vehicle width direction. However, according to the structure of the above embodiment, the power generation unit 1 and the inverter 6 are arranged separately on the left and right of the fuel tank 5. Therefore, even when the fuel increases or decreases, the weight balance of the vehicle in the vehicle width direction can be maintained in a nearly uniform state. Therefore, there is also an advantage that it is possible to prevent a decrease in running stability due to fluctuations in the weight balance of the vehicle as the fuel increases and decreases while enjoying the above-described effects.

  Further, according to the rear structure of the vehicle, as described above, the silencer 47b for suppressing the exhaust noise of the engine 2 is disposed behind the fuel tank 5, so that the fuel tank 5 is more highly protected. There is also an advantage of being able to. That is, since the silencer 47b has a hollow structure having a relatively large volume, the collision load is effectively absorbed by deformation of the silencer 47b at the time of a rear collision. That is, it functions suitably as a buffer member. Therefore, it becomes possible to protect the fuel tank 5 to a higher degree.

  Further, according to the rear structure of the vehicle, the exhaust purification device 47a is disposed at the front position of the engine 2, and the exhaust gas discharged from the engine 2 and purified by the exhaust purification device 47a is disposed at a position below the generator 3. The exhaust pipe 46 is configured to guide to the silencer 47b disposed behind the fuel tank 5 via. According to such a configuration, the cooling of the exhaust pipe 46 (exhaust gas) by the traveling wind is promoted, and the exhaust pipe 46 is not routed in the front position of the fuel tank 5, thereby Radiant heat from the exhaust pipe 46 to the fuel tank 5 is reduced. In addition, since a bracket 50 is interposed between the fuel tank 5 and the silencer 47b and the fuel tank 5 is shielded from the silencer 47b by the bracket 50, radiation heat from the silencer 47b to the fuel tank 5 is provided. Is also effectively suppressed. Therefore, there is an advantage that the fuel tank 5 is effectively prevented from being damaged by the radiant heat from the exhaust pipe 46.

  Further, according to the rear structure of the vehicle as described above, for example, a unit member in which the power generation unit 1, the fuel tank 5, and the inverter 6 are incorporated in the unit frame 24 in advance is constructed, and this unit member is mounted on the vehicle lower side. It is possible to adopt an assembling method in which the unit frame 24 is fixed to the rear side frame 18 by being inserted into the inner side (the rear position of the rear floor panel 14). Therefore, according to the rear structure of the vehicle, there is an advantage that the power generation unit 1, the fuel tank 5, the inverter 6, and the like can be efficiently incorporated into the vehicle.

  Although not mentioned in the description of the overall structure of the vehicle described above, an insulator 56 is arranged below the power generation unit 1 and the fuel tank 5 as shown in FIG. The insulator 56 is a cover member formed of, for example, a metal or a resin material, and is disposed so as to be interposed between the power generation unit 1 and the fuel tank 5 and the exhaust pipe 46 as shown in FIG. It is fixed at 24 etc. In this vehicle, the insulator 56 that covers the power generation unit 1 and the fuel tank 5 from the lower side as described above is provided, so that the fuel tank 5 and the like are protected from the jumping stone and the fuel tank 5 is shielded from the exhaust pipe 46. It is like that. Therefore, also in this respect, according to the vehicle, the fuel tank 5 is suppressed from being damaged by the radiant heat from the exhaust pipe 46.

  The rear structure of the vehicle described above is an example of a preferred embodiment of the rear structure of the vehicle according to the present invention, and the specific structure can be changed as appropriate without departing from the gist of the present invention. .

  For example, in the above embodiment, a rotary engine is applied as the engine 2, but the engine 2 may be a reciprocating engine. However, according to the rotary engine, as described above, the vertically occupied space can be suppressed by placing the vehicle vertically (the attitude in which the eccentric shaft extends in the vertical direction) with respect to the vehicle. Therefore, it is advantageous to apply a rotary engine as the engine 2 to a vehicle having a relatively small space below the rear floor panel 14 such as a hatchback type vehicle as described above.

  Moreover, in the said embodiment, although the metal plate-shaped member is applied as the frame member 4, the concrete shape of the frame member 4 is carried out by integrating the engine 2 and the generator 3 integrally. If the high-rigidity power generation unit 1 can be constructed, it is not always necessary to have a plate shape and can be selected as appropriate. However, if a plate member is applied as the frame member 4, it is possible to receive a large collision (rear collision) load with a simple structure while making the power generation unit 1 compact in the vertical direction.

DESCRIPTION OF SYMBOLS 1 Power generation unit 2 Engine 3 Generator 4 Frame member 5 Fuel tank 6 Inverter 18 Rear side frame 24 Unit frame 25 1st sub cross member 26 2nd sub cross member 27 Connection frame 42 Intake pipe 46 Exhaust pipe

Claims (5)

A rear structure of a vehicle including a generator and an engine for driving the generator,
A pair of left and right rear side frames each extending in the front-rear direction at the rear of the vehicle;
A cross member extending in the vehicle width direction between these rear side frames and connected to both rear side frames;
A power generation unit including the generator, the engine, and a frame member assembled so that the engine and the generator are arranged side by side;
A fuel tank for storing engine driving fuel,
The power generation unit is assembled to the cross member via the frame member in a state where the generator and the engine are aligned in the vehicle width direction.
The rear structure of the vehicle, wherein the fuel tank is arranged in a line in the vehicle width direction together with the generator and the engine. The rear structure of the vehicle according to claim 1,
A rear structure of a vehicle, wherein the fuel tank is assembled to the cross member. In the rear structure of the vehicle according to claim 1 or 2,
A vehicle characterized in that the power generation unit is disposed on one side of the fuel tank in the vehicle width direction, and an inverter is disposed on the other side for converting electric power generated by the generator into electric power for charging. Rear structure. In the rear structure of the vehicle according to any one of claims 1 to 3,
A rear structure of a vehicle, wherein a silencer for suppressing exhaust noise of the engine is disposed behind the fuel tank. In the rear structure of the vehicle according to claim 4,
The engine, the generator, and the fuel tank are arranged in this order along the vehicle width direction, and an exhaust pipe that guides the exhaust of the engine to the rear of the vehicle is provided.
The exhaust pipe includes the silencer extending in a vehicle width direction from a rear position of the generator to a rear position of the fuel tank, and an exhaust purification device disposed at a front position of the engine. A rear structure of a vehicle configured to guide the exhaust exhausted and purified by the exhaust purification device to the silencer via a lower position of the generator.

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