JP5487986B2 - Electric vehicle structure - Google Patents

Description

  The present invention includes an engine, a generator that can be driven by the engine, a battery that is charged with at least power generated by the generator, and a motor that is supplied with power from the battery and drives driving wheels. The present invention relates to a vehicle structure of an electric vehicle.

  Electricity comprising an engine, a generator that can be driven by the engine, a battery that is charged with at least power generated by the generator, and a motor that is supplied with power from the battery and drives the drive wheels Automobiles are known as prior art.

  In Patent Document 1, in the engine room, an electric motor is disposed in the vicinity of the engine, a battery as a power supply source of the electric motor is disposed under the rear seat, and below the driver seat and the passenger seat and A fuel tank is placed under the floor.

JP 2006-51943 A (FIG. 10)

  By the way, as an electric vehicle, while driving at a short distance, the power of a battery charged with external power is supplied to the motor to drive the driving wheel, while at the long distance, the generator is driven by the engine. There is known a plug-in hybrid vehicle in which the generated electric power is supplied to a battery and charged, and the electric power of the charged battery is supplied to a motor to drive drive wheels. In this plug-in hybrid vehicle, as described above, the engine is basically driven only during long-distance travel, and therefore the engine can be downsized.

  Here, in an electric vehicle, in particular, a plug-in hybrid vehicle in which the engine is downsized, the arrangement of the engine and the generator is devised, the center of gravity is lowered, the yaw moment of inertia is reduced, and the space in the front of the vehicle We want to improve the degree of freedom in designing the space in the front of the vehicle, for example, by making it possible to use the vehicle front space of the dash panel partitioned from the vehicle compartment by a dash panel as a trunk room.

  The present invention has been made in view of such points, and an object thereof is to provide an engine, a generator that can be driven by the engine, and a battery that is charged with at least power generated by the generator. In a vehicle structure of an electric vehicle provided with a motor that is supplied with electric power from the battery and drives a driving wheel, the center of gravity is lowered, the yaw moment of inertia is reduced, and the degree of freedom in designing the space in the front of the vehicle Is to improve.

According to a first aspect of the present invention, there is provided an engine, a generator that can be driven by the engine, a battery that is charged with at least power generated by the generator, and a motor that is driven by the battery to drive driving wheels. The electric vehicle has a vehicle structure, wherein the engine is disposed below the floor panel so as to be substantially in the same position with respect to a seat provided on the floor panel in the vehicle longitudinal direction, and the generator Is disposed below the floor panel, an air cleaner is disposed below the floor panel, and the engine and the generator are attached to a subframe having a substantially rectangular frame shape. , the generator and the air cleaner, which is characterized in that it is arranged to be positioned inside said sub-frame in a plan view A.

  According to this, since the engine is arranged below the floor panel so as to be substantially in the same position with respect to the seat provided on the floor panel in the vehicle front-rear direction, the relatively heavy engine is disposed in the vehicle front-rear direction. As a result, the center of gravity is lowered and the yaw moment of inertia can be reduced.

  Moreover, since the engine and the generator are arranged below the floor panel, the engine and the generator are arranged outside the space in the front of the vehicle, and the space in the front of the vehicle can be used as a trunk room. The degree of freedom in designing the space in the front part of the vehicle can be improved.

  Thus, the center of gravity can be lowered, the yaw moment of inertia can be reduced, and the degree of freedom in designing the space in the front part of the vehicle can be improved.

  According to a second aspect, in the first aspect, the engine is disposed below a center portion in the vehicle width direction of the floor panel.

  According to this, since the engine is disposed below the center part in the vehicle width direction of the floor panel, the engine having a relatively heavy weight is disposed in the center part in the vehicle width direction of the vehicle. Stability such as maneuvering can be improved.

  According to a third invention, in the first or second invention, the engine is disposed in a bulging portion formed so as to bulge upward in a portion corresponding to the seat of the floor panel. It is a feature.

  According to this, since the engine is disposed in the bulging portion formed so as to bulge upward in a portion corresponding to the seat of the floor panel, the lower space of the seat can be used effectively.

  According to a fourth invention, in any one of the first to third inventions, the generator is arranged on one side in a vehicle width direction of the engine.

  According to this, since the generator is arranged on one side in the vehicle width direction of the engine, the engine and the generator can be arranged close to each other.

  According to a fifth invention, in any one of the first to fourth inventions, at least a part of the vehicle is located in front of the engine and the generator in front of the dash panel below the floor panel. The engine further comprises a fuel tank for the engine arranged as described above.

  In a plug-in hybrid vehicle with a downsized engine, the fuel tank for the engine can be downsized. When the fuel tank is reduced in size, as in the present invention, the fuel tank is positioned in front of the engine and the generator, and at least part of the fuel tank is positioned behind the dash panel below the floor panel. Can be arranged.

  In a sixth aspect based on the fifth aspect, the fuel tank is supported by the dash cross member below the dash cross member provided in the vehicle front direction of the dash panel so as to extend in the vehicle width direction. It is characterized by this.

  According to this, since the fuel tank is supported by the dash cross member below the dash cross member provided so as to extend in the vehicle width direction in front of the vehicle on the dash panel, the fuel tank is supported by the existing dash cross member. And the increase in the number of members can be suppressed.

  According to a seventh aspect of the present invention, in any one of the first to sixth aspects, the portion of the floor panel corresponding to the seat has a higher front surface than a rear portion of the vehicle front portion. The engine is arranged such that its drive shaft is oriented in the vertical direction and is located below the front part of the vehicle in the part corresponding to the seat of the floor panel, The generator is arranged such that its rotating shaft is directed in the vertical direction.

  According to this, since the portion corresponding to the seat of the floor panel is formed such that the front portion of the vehicle has a higher upper surface than the rear portion, the seat is the front seat. In this case, the foot space of the occupant seated on the rear seat can be secured by the portion on the vehicle rear side in the portion corresponding to the seat of the floor panel whose upper surface is relatively low.

  According to an eighth invention, in any one of the first to seventh inventions, the subframe to which the engine and the generator are attached is provided to extend in a vehicle front-rear direction below the floor panel. It is attached to the left and right side frames.

  According to this, since the subframe to which the engine and the generator are attached is attached to the left and right side frames that are provided below the floor panel so as to extend in the vehicle front-rear direction, Can be transmitted to the other side frame via the sub-frame, and the impact load can be dispersed during an offset frontal collision.

  According to a ninth invention, in any one of the first to eighth inventions, the engine is disposed at substantially the same position with respect to a front seat provided on a floor panel and a vehicle front-rear direction, and the battery includes: It is arrange | positioned under the rear seat provided on the said floor panel in the vehicle back of the said front seat.

  When the fuel tank is disposed in a portion other than the lower portion of the rear seat where the fuel tank is normally disposed, the battery can be disposed under the rear seat as in the present invention.

  In a tenth aspect based on the ninth aspect, the battery has a first cross member provided to extend in the vehicle width direction in front of the vehicle, and extends in the vehicle width direction in the rear of the battery. It is supported by the provided second cross member.

  According to this, the battery is supported by the first cross member provided to extend in the vehicle width direction at the front of the vehicle and the second cross member provided to extend in the vehicle width direction at the rear of the battery. Therefore, the battery can be stably supported by the first and second cross members having relatively high rigidity.

An eleventh aspect of the invention includes an engine, a generator that can be driven by the engine, a battery that is charged with at least power generated by the generator, and a motor that is driven by the battery to drive driving wheels. The electric vehicle has a vehicle structure, wherein the engine is disposed below the floor panel at a center portion in the front-rear direction of the vehicle, the generator is disposed below the floor panel, and an air cleaner However, the engine and the generator are attached to a substantially rectangular frame-shaped subframe, and the engine, the generator, and the air cleaner are arranged in a plan view. It is arrange | positioned so that it may be located inside a flame | frame.

  According to this, since the engine is disposed below the floor panel in the center portion in the front-rear direction of the vehicle, the relatively heavy engine is disposed in the center portion in the front-rear direction of the vehicle, and the center of gravity is lowered. In addition, the yaw moment of inertia can be reduced.

  Moreover, since the engine and the generator are arranged below the floor panel, the engine and the generator are arranged outside the space in the front of the vehicle, and the space in the front of the vehicle can be used as a trunk room. The degree of freedom in designing the space in the front part of the vehicle can be improved.

  Thus, the center of gravity can be lowered, the yaw moment of inertia can be reduced, and the degree of freedom in designing the space in the front part of the vehicle can be improved.

  According to the present invention, the engine is disposed below the floor panel so as to be substantially in the same position with respect to the seat provided on the floor panel in the vehicle front-rear direction. The center of gravity is lowered, the center of gravity can be lowered, the moment of inertia of the yaw can be reduced, and the engine and the generator are arranged below the floor panel. It will be placed outside the front space of the vehicle, and the space in the front of the vehicle can be used as a trunk room, improving the degree of freedom in designing the space in the front of the vehicle. In addition, the yaw moment of inertia can be reduced, and the degree of freedom in designing the space in the front of the vehicle can be improved.

  According to another invention, since the engine is disposed below the floor panel in the center portion in the front-rear direction of the vehicle, the relatively heavy engine is disposed in the center portion in the front-rear direction of the vehicle. In addition, the yaw moment of inertia can be reduced, and the engine and the generator are disposed below the floor panel, so that the engine and the generator are disposed outside the front space of the vehicle. It is possible to improve the design freedom of the space in the front part of the vehicle, such as the space in the front part of the vehicle can be used as a trunk room, and as a result, the center of gravity is lowered and the yaw moment of inertia is reduced. The degree of freedom in designing the space at the front of the vehicle can be improved.

1 is a block diagram schematically showing a drive system of an electric vehicle according to an embodiment of the present invention. It is a schematic side view which shows the whole structure of an electric vehicle. It is a schematic plan view which shows the whole structure of an electric vehicle. It is a schematic perspective view which shows the structure of a floor tunnel. It is a schematic bottom view which shows the support structure to the No. 3 and No. 4 cross member of a battery. It is a schematic front view which shows the support structure to the dash cross member of a fuel tank. It is a schematic side view which shows the support structure to the dash cross member of a fuel tank. FIG. 8 is a cross-sectional view taken along line VIII-VIII in FIG. 3. It is the IX-IX arrow directional cross-sectional view of FIG. FIG. 4 is a cross-sectional view taken along line X-X in FIG. 3. It is a general | schematic disassembled perspective view which shows the attachment structure to the sub-frame of an engine and a generator.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

-Configuration of electric vehicle drive system-
FIG. 1 is a block diagram schematically showing a drive system of an electric vehicle equipped with an engine. This electric vehicle (hereinafter also referred to as a vehicle) 1 is used when traveling at a short distance (for example, traveling at 50 km or less). The electric power of the battery 12 charged with external power from an external power source such as a household power source is supplied to the motor 16 to drive the drive wheels, while the generator 10 (generator) 14 is driven by the engine 10 during long distance travel. Is a plug-in hybrid vehicle in which the generated electric power is supplied to the battery 12 and charged, and the electric power of the charged battery 12 is supplied to the motor 16 to drive the drive wheels. As described above, the plug-in hybrid vehicle includes the engine 10 and the motor 16 as power sources. The engine 10 is used only for power generation, and all the power for moving the vehicle 1 depends on the motor 16. It is a hybrid car.

The engine 10 is a single cylinder (hereinafter also referred to as a cylinder) small reciprocating engine. In the reciprocating engine, the piston (in the cylinder) is moved up and down by the energy obtained by burning the fuel (for example, gasoline) supplied from the fuel tank 18 for the engine in the combustion chamber, and this is connected to the connecting rod and the crankshaft 10a (drive). A shaft (shown in FIG. 2 and the like) is replaced with a rotational motion. Further, an intake passage (intake pipe) 20 (shown in FIG. 2 and the like) and an exhaust passage (exhaust pipe) 22 (shown in FIG. 3 and the like) communicate with the cylinder. The intake passage 20 is provided with an air cleaner 20a using a filter to remove foreign matters and dust in the intake air. The exhaust passage 22, along with the HC and CO in the exhaust gas, the exhaust purification device 22a using the three-way catalyst for purifying harmful components such as NO _X is provided downstream of the exhaust purification device 22a Is provided with a muffler 22b that cancels and absorbs the pressure fluctuations of the exhaust gas explosion sound and quiets the sound. The engine 10 is automatically operated when the remaining amount of the battery 12 is low (for example, when the charge rate SOC of the battery 12 is 30% or less). As described above, since the engine 10 is downsized, the fuel tank 18 and the air cleaner 20a are also downsized.

  The battery 12 has a large capacity and high performance with a large capacity, and is connected to the generator 14 and the motor 16 via an inverter 24, respectively. The generated power from the generator 14 and the regenerative power from the motor 16 are connected to each other. Is supplied and charged. The battery 12 supplies the electric power to the motor 16 to drive it. The battery 12 can be supplied and charged with external power from an external power source when the vehicle 1 is not in use.

  The generator 14 has a rotating shaft (input shaft) 14 a (shown in FIG. 2 and the like) connected to the crankshaft 10 a of the engine 10 and can be driven by the engine 10.

  The motor 16 includes a left rear wheel motor 16a (shown in FIG. 2 and the like) and a right rear wheel motor 16b (shown in FIG. 3). The left rear wheel motor 16a has a rotation shaft (output shaft) connected to the left rear wheel 26 as the drive wheel via a final gear 30 and a drive shaft (drive shaft) 32, and the battery 12 and / or Electric power is supplied from the generator 14 to drive the left rear wheel 26. The right rear wheel motor 16b has a rotating shaft connected to the right rear wheel 28 as the driving wheel via a final gear 30 and a driving shaft 32, and is supplied with electric power from the battery 12 and / or the generator 14. The right rear wheel 28 is driven. The final gear 30 finally reduces the rotational speed of the motors 16a and 16b and transmits the power of the motors 16a and 16b to the rear wheels 26 and 28.

  The inverter 24 includes an AC-DC converter (an inverter for the generator 14) 24a that converts AC power into DC power and a DC-AC converter (an inverter for the motor 16) 24b that converts DC power into AC power. In other words, the battery 12, the generator 14, and the motor 16 exchange electric power and convert them. Specifically, when charging the battery 12 with the power from the generator 14, the AC power from the generator 14 is converted into DC power by the AC-DC converter 24 a and supplied to the battery 12. Further, when the electric power of the battery 12 is supplied to the motor 16, the DC power from the battery 12 is converted into AC power by the DC-AC converter 24 b and supplied to the motor 16. Further, when supplying power from the generator 14 to the motor 16, the AC power from the generator 14 is converted into DC power by the AC-DC converter 24a, and then the DC power is converted into AC power by the DC-AC converter 24b. To the motor 16.

-Overall structure of electric vehicle-
Hereinafter, the overall structure of the electric vehicle 1 will be described. 2 is a schematic side view showing the entire structure of the electric vehicle, FIG. 3 is a schematic plan view showing the entire structure of the electric vehicle, FIG. 4 is a schematic perspective view showing the structure of the floor tunnel, and FIG. 6 is a schematic bottom view showing a support structure for a No. 3 and No. 4 cross member, FIG. 6 is a schematic front view showing a support structure for a dash cross member of a fuel tank, and FIG. FIG. 8 is a sectional view taken along the line VIII-VIII in FIG. 3, FIG. 9 is a sectional view taken along the line IX-IX in FIG. 3, and FIG. FIG. 11 is a schematic exploded perspective view showing a structure for attaching the engine and the generator to the subframe. In these figures, illustration of members is omitted or simplified for the sake of clarity.

  First, the vehicle body structure will be described.

  A trunk room 44 as a vehicle front space of the dash panel 40 (a space in front of the vehicle 1), which is partitioned from the vehicle compartment 42 by the dash panel 40, is provided at the front of the vehicle 1. A spare tire S is accommodated in the left rear portion of the track room 44.

  Left and right front side frames 46 and 48 are disposed on both sides of the trunk room 44 in the vehicle width direction so as to extend in the vehicle front-rear direction. These front side frames 46 and 48 are inclined in the first horizontal portions 46a and 48a that extend in the vehicle front-rear direction in front of the dash panel 40 and the rear end of the first horizontal portions 46a and 48a. Inclined portions 46b and 48b that extend obliquely downward and rearward along the front surface of the wall portion 40d, and the rear of the vehicle along the lower surface of the floor panel 50 that forms the bottom surface of the passenger compartment 42 from the rear ends of the inclined portions 46b and 48b. Second horizontal portions 46c and 48c extending in the horizontal direction.

  The dash panel 40 has a dash lower 40 a that rises upward from the front end of the floor panel 50 and extends in the vehicle width direction, and a dash upper 40 b that extends upward from the upper end of the dash lower 40. The dash lower 40a includes a vertical wall portion 40c extending in the vertical direction, and an inclined wall portion 40d extending obliquely downward and rearward from the lower end of the vertical wall portion 40c and connected to the front end of the floor panel 50. A dash cross member 40e extending in the vehicle width direction and connected to the rear end portions of the first horizontal portions 46a and 48a of the front side frames 46 and 48 is provided on the front surface of the lower end portion of the vertical wall portion 40c. . The dash upper 40b is provided with a cowl panel 52 that opens upward between the hood and the front windshield so as to extend in the vehicle width direction.

  On the front portion of the floor panel 50, a front seat 54 is provided in which a driver's seat 54a and a passenger seat 54b are arranged at intervals in the vehicle width direction. On both sides of the floor panel 50 in the vehicle width direction, left and right side sills 56 and 58 are respectively arranged on the side of the vehicle compartment 42 (under the door) so as to extend in the vehicle front-rear direction. The front ends of these side sills 56, 58 are connected to connecting portions of the inclined portions 46b, 48b of the front side frames 46, 48 and the second horizontal portions 46c, 48c via connecting members 60, 60 extending in the vehicle width direction. ing.

  On the lower surface of the floor panel 50, left and right B frames 62 and 64 (corresponding to “side frames” in claim 8) are provided so as to extend in the vehicle front-rear direction inwardly in the vehicle width direction of the respective side sills 56 and 58. ing. These B frames 62 and 64 improve the rigidity of the floor panel 50. The front ends of the B frames 62 and 64 are connected to the rear ends of the second horizontal portions 46c and 48c of the front side frames 46 and 48. The front end portion is connected to the front end portions of the side sills 56, 58 via the front connecting members 66, 66 extending in the vehicle width direction, while the rear end portion is connected to the rear end portions of the side sills 56, 58 in the vehicle width direction. It is connected via connecting members 68, 68. The B frames 62 and 64 extend along the inner surface of the side wall 50e in a center tunnel 50c of a floor tunnel 50a described later.

  A floor tunnel 50a is formed in a substantially trapezoidal cross section at the center in the vehicle width direction of the floor panel 50 so that the floor tunnel 50a bulges (lifts) upward. The floor tunnel 50a includes a front tunnel portion 50b extending from the dash lower 40a to the rear of the vehicle between the B frames 62 and 64, and a rearward end of the front tunnel 50b to the rear of the vehicle. And the rear end of the central portion in the vehicle width direction of the central tunnel portion 50c between the B frames 62 and 64, and the central tunnel portion 50c (bulging portion) that is longer in the vehicle width direction than the front tunnel portion 50b. The vehicle interior 42 extends rearward from the vehicle to reach a kick-up portion 50i, which will be described later, and includes a front tunnel portion 50b and a rear tunnel portion 50d having substantially the same vehicle width direction length. The front portion of the front tunnel portion 50b is formed such that the upper surface of the upper wall portion 50f extends substantially horizontally, while the rear portion is formed such that the height of the upper surface of the upper wall portion 50f increases as going rearward of the vehicle. Has been. The central tunnel portion 50c is formed in a portion corresponding to the front seat 54 of the floor panel 50, and extends in the vehicle width direction from the position in the vehicle width direction central portion of the driver seat 54a to the position in the vehicle width direction central portion of the passenger seat 54b. In the vehicle longitudinal direction, the B frames 62 and 64 are provided from the front end position to the rear end position. The center tunnel portion 50c is formed so that the front side portion of the vehicle has a higher height on the upper surface of the upper wall portion 50g than the rear side portion. The rear tunnel portion 50d is formed such that the height of the upper surface of the upper wall portion 50h decreases as going rearward of the vehicle. And the front tunnel part 50b, the center tunnel part 50c, and the back tunnel part 50d are formed so that the upper surface of the upper wall parts 50f-50h may become a continuous surface.

  A kick-up portion 50i is formed at the center of the floor panel 50 in the front-rear direction of the vehicle so as to rise upward, and a rear floor panel 50j is formed so as to extend rearward from the upper end of the kick-up portion 50i. Has been. A bench-type rear seat 70 is provided on the front portion of the rear floor panel 50j. A luggage compartment floor 50k is formed on the rear floor panel 50j behind the rear seat 70 in the vehicle. That is, the cargo floor 50k constitutes the rear part of the rear floor panel 50j.

  Left and right rear side frames 72 and 74 are provided on the lower surfaces of both ends in the vehicle width direction of the rear floor panel 50j so as to extend in the vehicle front-rear direction. These rear side frames 72 and 74 have inclined portions 72a and 74a that incline upward toward the rear of the vehicle, and horizontal portions 72b and 74b that extend rearward from the rear ends of the inclined portions 72a and 74a. . The front ends of the inclined portions 72a and 74a are connected to the rear ends of the side sills 56 and 58, respectively.

  On the rear surface of the kick-up portion 50e, a No. 3 cross member 76 (first cross member) extends in the vehicle width direction below the front end portion of the rear floor panel 50f and is connected to the front end portions of the rear side frames 72 and 74. Is provided. The rear floor panel 50j extends in the vehicle width direction behind the No. 3 cross member 76 on the lower surface of the center portion in the vehicle front-rear direction and extends to the vehicle front-rear direction center portions of the rear side frames 72, 74 (rear side frames 72, 74). No. 4 cross member 78 (second cross member) connected to the inclined portions 72a and 74a and the horizontal portions 72b and 74b). The lower surface of the No. 4 cross member 78 is higher than the lower surface of the No. 3 cross member 76.

  The rear wheels 26 and 28 employ a torsion beam suspension 80 of a type in which left and right trailing arms 80a and 80b are connected by a beam called a cross beam 80c. The cross beam 80c is positioned in the front and rear of the rear floor panel 50j so that the cross beam 80c is located in front of the wheel shaft at the center of the rear wheels 26 and 28 and rearward of the front ends of the rear wheels 26 and 28 in the vehicle side view. It arrange | positions so that it may extend in a vehicle width direction below the direction center part (below No. 4 cross member 78). That is, the cross beam 80c forms a connecting member that forms part of the suspension 80 that connects the left and right rear wheels 26 and 28.

  Next, the arrangement structure of the engine 10 and the generator 14 will be described.

  The engine 10 is substantially at the same position as the front seat 54 and the vehicle longitudinal direction (in this embodiment, between the driver seat 54a and the passenger seat 54b below the floor panel 50), and the crankshaft 10a extends in the vertical direction. The floor panel 50 is disposed below the center in the vehicle width direction. That is, the engine 10 is provided below the floor panel 50 in the center portion of the vehicle 1 in the front-rear direction. Specifically, the engine 10 has a cylinder head side facing the vehicle rear side, an intake side facing the vehicle right side, and a crankshaft 10a facing the center tunnel portion in the center portion in the vehicle width direction in the wide center tunnel portion 50c of the floor tunnel 50a. It is arranged so as to be located on the front side of the vehicle on the elevated floor 50c.

  The battery 12 is disposed below the front portion of the rear floor panel 50j. That is, the battery 12 is provided below the rear seat 70. The battery 12 is supported by a No. 3 cross member 76 provided near the front of the vehicle and a No. 4 cross member 78 provided at the rear of the battery 12 in the vehicle. Specifically, the battery 12 is lowered by two belt-like members 82, 82 that are installed between the lower surface of the No. 3 cross member 76 and the lower surface of the No. 4 cross member 78 with a gap in the vehicle width direction. It is supported.

  The generator 14 is disposed close to the engine 10 so that the rotating shaft 14a extends in the vertical direction on the left side of the vehicle at the front of the engine 10 below the floor panel 50 and is aligned with the crankshaft 10a of the engine 10 in the vehicle width direction. Has been. That is, the generator 14 is provided in the center tunnel portion 50c of the floor tunnel 50a side by side with the engine 10 in the vehicle width direction. The rotating shaft 14 a of the generator 14 is connected in parallel to the crankshaft 10 a of the engine 10 via a gear 34. The gear 34 is disposed on the upper surface side of the engine 10 and the generator 14. The generator 14 is integrally coupled to the left front portion of the engine 10, whereby the engine 10 and the generator 14 are assembled.

  The left rear wheel motor 16a is integrally coupled to the final gear 30, and is disposed so that the rotation shaft extends in the vehicle width direction below the left front portion of the cargo compartment floor 50k. The right rear wheel motor 16b is integrally coupled to the final gear 30, and is disposed so that the rotating shaft extends in the vehicle width direction below the right side of the front of the cargo compartment floor 50k. That is, the left rear wheel motor 16a and the right rear wheel motor 16b are arranged side by side in the vehicle width direction behind the cross beam 80c in the vehicle.

  The fuel tank 18 is arranged in front of the engine 10 and the generator 14 so that the rear part is located behind the dash panel 40 below the floor panel 50. That is, the rear portion of the fuel tank 18 is provided in the front tunnel portion 50b. The fuel tank 18 is supported by the dash cross member 40e below the dash cross member 40e. Specifically, the fuel tank 18 is held and supported by a substantially U-shaped belt-like member 84 whose front part is suspended from the center part in the vehicle width direction of the dash cross member 40e, while its rear part is supported. The B frames 62 and 64 are supported downward by a substantially flat belt-like member 86 installed between the front end portions of the B frames 62 and 64. The fuel supply pipe 18a of the fuel tank 18 extends from the front end of the fuel tank 18 to the right side of the vehicle, and the fuel supply port 18b opens to the right front fender.

  The intake passage 20 extends from the engine 10 through the floor tunnel 50a to the cowl panel 52, and the intake port 20b opens to the cowl panel 52 toward the outside of the vehicle. Specifically, the intake passage 20 extends from the rear right side of the engine 10 to the right side of the vehicle and reaches the left side position of the right side frame 90b of the sub-frame 90, which will be described later, and then extends to the left front side of the vehicle. And reaches the position between the fuel tank 18, and then extends between the fuel tank 18 and the upper wall portion 50 f of the front tunnel portion 50 b to the front of the vehicle and reaches the vehicle front position of the dash panel 40. Next, the intake passage 20 extends diagonally upward to the right through the vehicle front of the dash panel 40 (along the front surface of the dash panel 40) and reaches the cowl panel 52. The intake passage 20 takes in the outside air taken into the cowl panel 52 into the engine 10. The air cleaner 20 a is disposed on the right side of the vehicle at the rear of the engine 10 below the floor panel 50.

  The exhaust passage 22 extends from the engine 10 to the rear of the vehicle below the floor panel 50. Specifically, the exhaust passage 22 is curved from the rear left side of the engine 10 to the right side of the vehicle through the central tunnel portion 50c and reaches the center position in the vehicle width direction in the central tunnel portion 50c. 90 extends rearward of the vehicle through the rear frame 90d and through the rear tunnel portion 50d to reach the lower position of the battery 12, and then extends to the right of the vehicle and reaches the lower position of the inverter 24. Next, the exhaust passage 22 extends rearward of the vehicle and reaches the vehicle rear position of the drive shaft 32 of the right rear wheel 28, and then extends leftward of the vehicle and reaches the vehicle rear position of the drive shaft 32 of the left rear wheel 26. Then, it extends to the rear of the vehicle. The exhaust purification device 22 a is disposed between the rear frame 90 d of the subframe 90 and the battery 12 below the floor panel 50. The muffler 22b is disposed behind the right rear wheel motor 16b below the rear part of the cargo compartment floor 50k. The inverter 24 is disposed in proximity to the battery 12 on the right side of the battery 12 below the front left side of the rear floor panel 50j.

  As described above, the power generation unit including the engine 10, the generator 14, and the fuel tank 18 is disposed at the center of the vehicle 1, and the electric drive unit including the battery 12, the motor 16, and the inverter 24 is divided at the rear of the vehicle 1. Thereby, while being able to simplify a harness and piping, weight distribution of the vehicle 1 can be optimized.

  The engine 10 and the generator 14 are attached to a subframe 90 having a substantially rectangular frame shape in plan view. Details of this attachment will be described below.

  The sub-frame 90 includes left and right side frames 90a and 90b extending in the vehicle front-rear direction, a front frame 90c extending in the vehicle width direction and coupled to the front end portions of the side frames 90a and 90b, and the front frame 90c. A rear frame 90d that extends in parallel with the front frame 90c and is coupled to the rear ends of the side frames 90a and 90b at the rear of the vehicle. The side frames 90a and 90b and the front frame 90c are integrated. In the side frames 90a and 90b, the upper surface of the rear end portion is recessed downward, and the rear frame 90d is fastened and fixed to the upper surface of the recessed portion by a fastening member 90e. The side frames 90a and 90b have substantially the same length as the B frames 62 and 64. The lengths of the front and rear frames 90c and 90d are substantially the same as the distance between the B frames 62 and 64. The sub-frame 90 has two corners on the vehicle front side of the four corners projecting inward of the sub-frame 90, and the left and right projecting parts 90f and 90g are formed in a substantially triangular shape. Yes.

  Then, the engine 10 and the generator 14 that are integrally coupled are placed on the upper surface of the right projecting portion 90g via the bracket 10b and the mount rubber 92 provided on the right side of the front portion of the engine 10, and the The bracket 10c and the mounting rubber 92 are provided on the upper surface of the right portion of the rear frame 90d, and the left projecting portion 90f is provided on the left side of the generator 14 with the bracket 14b and the mounting rubber 92. Elastically supported on the upper surface.

  In addition, the subframe 90 to which the engine 10 and the generator 14 are attached is attached to the lower surfaces of the B frames 62 and 64. That is, after the engine 10 and the generator 14 are attached to the subframe 90, the subframe 90 to which the engine 10 and the generator 14 are attached is attached to the B frames 62 and 64. Specifically, the sub-frame 90 has two corners on the front side of the vehicle among the four corners such that the side frames 90a and 90b extend along the B frames 62 and 64, respectively. Two corners on the rear side of the vehicle are fastened and fixed to the lower surfaces of the rear ends of the B frames 62 and 64 by fastening members 94, respectively. Thus, by attaching the sub-frame 90 to which the engine 10 and the generator 14 are attached to the B frames 62 and 64, the engine 10 and the generator 14 are disposed in the central tunnel portion 50c of the floor tunnel 50a as described above. . The front and rear frames 90c and 90d function as members that receive the impact load when the vehicle 1 collides. That is, the front and rear frames 90c and 90d also serve as a cross member of the vehicle body.

  As described above, the engine 10, the generator 14, and the like are attached to and supported by the vehicle body.

-Effect-
As described above, according to the present embodiment, the engine 10 is positioned at substantially the same position in the vehicle front-rear direction as the front seat 54 provided on the floor panel 50 (that is, below the floor panel 50 in the center portion of the vehicle 1 in the front-rear direction). Since the engine 10 having a relatively heavy weight is arranged at the center in the front-rear direction of the vehicle 1, the center of gravity is lowered and the yaw moment of inertia is reduced. Can be made.

  Further, since the engine 10 and the generator 14 are disposed below the floor panel 50, the engine 10 and the generator 14 are disposed outside the space in the front of the vehicle 1, and the vehicle 1 as in the present embodiment. The degree of freedom in designing the space in the front of the vehicle 1 can be improved, for example, the space in the front can be used as the trunk room 44.

  Thus, the center of gravity can be lowered, the yaw moment of inertia can be reduced, and the design freedom of the space in the front of the vehicle 1 can be improved.

  In addition, since the engine 10 is disposed below the central portion in the vehicle width direction of the floor panel 50, the relatively heavy engine 10 is disposed in the central portion in the vehicle width direction of the vehicle 1, and the weight and travel , Stability such as maneuvering can be improved.

  Further, since the engine 10 is disposed in the central tunnel portion 50c formed so as to bulge upward in a portion corresponding to the front seat 54 of the floor panel 50, the space below the front seat 54 is effectively used. be able to.

  Furthermore, since the generator 14 is arranged on one side in the vehicle width direction of the engine 10, the engine 10 and the generator 14 can be arranged close to each other as in the present embodiment.

  In the plug-in hybrid vehicle in which the engine 10 is downsized, the fuel tank 18 for the engine 10 can be downsized. When the fuel tank 18 is downsized as in the present embodiment, the fuel tank 18 is part of the vehicle ahead of the engine 10 and the generator 14 and a part of the fuel tank 18 is lower than the dash panel 40 below the floor panel 50. It can arrange | position so that it may be located back.

  Further, since the fuel tank 18 is supported by the dash cross member 40e below the dash cross member 40e provided so as to extend in the vehicle width direction in front of the dash panel 40, the existing dash cross member 40e The fuel tank 18 can be supported, and an increase in the number of members can be suppressed.

  Furthermore, the portion corresponding to the front seat 54 of the floor panel 50 (that is, the central tunnel portion 50c) is formed such that the front side portion of the vehicle has a higher upper surface than the rear side portion. Therefore, the foot space of the occupant seated on the rear seat 70 can be secured by the portion on the vehicle rear side in the portion corresponding to the front seat 54 of the floor panel 50 whose upper surface is relatively low.

  Further, since the sub-frame 90 to which the engine 10 and the generator 14 are attached is attached to the left and right B frames 62 and 64 that are provided below the floor panel 50 so as to extend in the vehicle front-rear direction, The impact load applied to the B frame 62 (or 64) can be transmitted to the other side frame 64 (or 62) via the subframe 90, and the impact load can be dispersed during an offset frontal collision.

  Furthermore, since the fuel tank 18 is disposed at a portion other than the lower portion of the rear seat 70 where the fuel tank 18 is normally disposed, the battery 12 can be disposed below the rear seat 70.

  Furthermore, the battery 12 has a No. 3 cross member 76 provided so as to extend in the vehicle width direction in front of the vehicle, and a No. 4 cross member provided so as to extend in the vehicle width direction behind the battery 12 in the vehicle. 78, the battery 12 can be stably supported by the No. 3 and No. 4 cross members 76 and 78 having relatively high rigidity.

(Other embodiments)
In the above embodiment, the fuel tank 18 is disposed so that the rear portion thereof is located behind the dash panel 40 below the floor panel 50, but at least a part of the fuel tank 18 is located below the floor panel 50. It may be arranged so as to be positioned further to the rear of the vehicle, for example, all may be disposed to be positioned behind the dash panel 40 below the floor panel 50.

  In the above-described embodiment, the battery 12 is disposed below the floor panel 50 and below the rear seat 70. However, the present invention is not limited to this. For example, the battery 12 is disposed above the floor panel 50 and below the rear seat 70. May be.

  Furthermore, in the above-described embodiment, the engine 10 is a one-cylinder reciprocating engine, but is not limited thereto, and may be, for example, a two-cylinder reciprocating engine or a one-rotor rotary engine. . This rotary engine has an eccentric shaft as a drive shaft.

  Furthermore, in the above embodiment, the crankshaft 10a of the engine 10 and the rotating shaft 14a of the generator 14 are connected via the gear 34. However, the present invention is not limited to this, and for example, the crankshaft 10a is connected via a chain, a belt, or the like. May be.

  The present invention is not limited to the embodiments, and can be implemented in various other forms without departing from the spirit or main features thereof.

  As described above, the above-described embodiment is merely an example in all respects and should not be interpreted in a limited manner. The scope of the present invention is defined by the claims, and is not limited by the specification. Further, all modifications and changes belonging to the equivalent scope of the claims are within the scope of the present invention.

  As described above, the vehicle structure of the electric vehicle according to the present invention is intended to reduce the center of gravity, reduce the yaw moment of inertia, and improve the design freedom of the space at the front of the vehicle. Applicable to.

1 Electric vehicle 10 Engine 10a Crankshaft (drive shaft)
12 Battery 14 Generator (generator)
14a Rotating shaft 18 Fuel tank 40 Dash panel 40e Dash cross member 50 Floor panel 50a Floor tunnel 50c Center tunnel part (bulging part)
54 Front seat 62, 64 B frame (side frame)
70 Rear seat 76 No.3 cross member (first cross member)
78 No.4 cross member (second cross member)
90 subframes

Claims (11)

An electric vehicle comprising an engine, a generator that can be driven by the engine, a battery that is charged with at least power generated by the generator, and a motor that is driven by the battery to drive driving wheels Vehicle structure,
The engine is disposed below the floor panel so as to be substantially in the same position with respect to the vehicle front-rear direction as the seat provided on the floor panel,
The generator is disposed below the floor panel,
An air cleaner is disposed below the floor panel;
The engine and the generator are attached to a substantially rectangular frame-shaped subframe,
The vehicle structure of an electric vehicle, wherein the engine, the generator, and the air cleaner are arranged so as to be positioned inside the subframe in a plan view . In the vehicle structure of the electric vehicle according to claim 1,
The vehicle structure of an electric vehicle, wherein the engine is disposed below a center portion in the vehicle width direction of the floor panel. In the vehicle structure of the electric vehicle according to claim 1 or 2,
The vehicle structure of an electric vehicle, wherein the engine is disposed in a bulging portion formed to bulge upward at a portion corresponding to the seat of the floor panel. In the vehicle structure of the electric vehicle according to any one of claims 1 to 3,
The electric generator is arranged on one side in the vehicle width direction of the engine. In the vehicle structure of the electric vehicle according to any one of claims 1 to 4,
The engine further includes a fuel tank for the engine, which is disposed so that at least a part of the engine and the generator is positioned at the rear of the vehicle rather than the dash panel below the floor panel. The vehicle structure of the electric vehicle characterized. In the vehicle structure of the electric vehicle according to claim 5,
The fuel tank is supported by the dash cross member below the dash cross member provided so as to extend in the vehicle width direction in front of the dash panel in the vehicle. In the vehicle structure of the electric vehicle according to any one of claims 1 to 6,
The portion of the floor panel corresponding to the seat is formed such that the vehicle front side portion has a higher top surface than the rear side portion.
The engine is disposed such that a drive shaft thereof is oriented in the vertical direction and is located below a portion on the vehicle front side in a portion corresponding to the seat of the floor panel,
A vehicle structure of an electric vehicle, characterized in that the generator is arranged such that a rotating shaft thereof is directed in a vertical direction. In the vehicle structure of the electric vehicle according to any one of claims 1 to 7,
The sub-frame, to which the engine and the generator are attached, is attached to left and right side frames provided to extend in the vehicle front-rear direction below the floor panel. . In the vehicle structure of the electric vehicle according to any one of claims 1 to 8,
The engine is disposed at substantially the same position in the vehicle front-rear direction with the front seat provided on the floor panel,
The vehicle structure of an electric vehicle, wherein the battery is disposed below a rear seat provided on the floor panel behind the front seat. The vehicle structure of the electric vehicle according to claim 9,
The battery is supported by a first cross member provided to extend in the vehicle width direction in front of the vehicle and a second cross member provided to extend in the vehicle width direction behind the battery. The vehicle structure of the electric vehicle characterized by the above-mentioned. An electric vehicle comprising: an engine; a generator that can be driven by the engine; a battery that is charged with at least power generated from the generator; and a motor that is supplied with power from the battery and drives driving wheels Vehicle structure,
The engine is disposed below the floor panel at the center in the longitudinal direction of the vehicle,
The generator is disposed below the floor panel,
An air cleaner is disposed below the floor panel;
The engine and the generator are attached to a substantially rectangular frame-shaped subframe,
The vehicle structure of an electric vehicle, wherein the engine, the generator, and the air cleaner are disposed so as to be positioned inside the subframe in a plan view .

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