JP2009096289A - Front vehicle body structure of vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a front vehicle body structure capable of enhancing the steering stability by arranging a power train on a rear side of a vehicle, and effectively preventing any damage of vehicular auxiliary machines arranged in an engine compartment when the vehicle is collided. <P>SOLUTION: In a vehicle in which a recessed part 5 recessed to a rear side of a vehicle body is formed in a dash panel 3 for demarcating a cabin 1 from an engine compartment 2, and a part of a power train 11 for driving wheels is arranged in the recessed part 5, a bulkhead member 19 demarcating a forward part of the power train 11 extends in the vehicle width direction in the engine compartment 2, and vehicular auxiliary machines consisting of an on-vehicle battery 35 or a hydraulic control device 36 or the like for an antilock brake system are arranged at the position overlapping the bulkhead member 19 in front view, and at the position aside the power train 11. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  In the present invention, the dash panel that partitions the vehicle compartment and the engine room is provided with a recessed portion that is recessed toward the rear side of the vehicle body, and a part of the power train that drives the wheels is disposed in the recessed portion. The present invention relates to a front body structure of a vehicle.

Conventionally, as shown in Patent Documents 1 to 3 below, a vehicle compartment and an engine room partitioned by a dash panel are provided in front of the vehicle compartment, and a power train including an engine body and a transmission is arranged in the engine room. In the installed vehicle, a recessed portion that is recessed toward the rear of the vehicle from both side portions is provided in the vehicle width direction center portion of the dash panel, and the rear end portion of the engine body, the transmission, and the like are provided in the recessed portion. By disposing the power train and positioning the power train on the rear side of the vehicle body, the yaw moment of inertia when the vehicle is running is reduced to improve the steering stability.
JP 2003-326981 A JP 2005-028911 A JP 2005-029057 A

  When the power train is disposed in the recessed portion formed in the dash panel as disclosed in Patent Documents 1 to 3, the steering stability during traveling of the vehicle can be improved, It is possible to effectively expand the effective space in the engine room, and there is an advantage that various vehicle auxiliary machines can be arranged in the engine room. However, when a vehicular auxiliary machine is provided in the engine room, the vehicular auxiliary machine may be damaged at the time of a vehicle collision, and it is desired to effectively prevent this. It was.

  The present invention has been made in view of the above-described problems. A power train is disposed on the rear side of a vehicle to improve steering stability, and a vehicle auxiliary device disposed in an engine room is provided. An object of the present invention is to provide a vehicle front body structure that can effectively prevent damage in the event of a vehicle collision.

  In the invention according to claim 1, a dash panel that divides the vehicle compartment and the engine room is provided with a recessed portion that is recessed toward the rear side of the vehicle body, and a part of the power train that drives the wheels is included in the recessed portion. In the disposed vehicle, a partition member that divides the front portion of the power train in the front and rear direction is extended in the vehicle width direction in the engine room, and the power train is located at a position overlapping the partition member in a front view. A vehicle auxiliary machine is disposed at a side position of the vehicle.

  According to a second aspect of the present invention, in the vehicle front body structure according to the first aspect of the present invention, there is provided a vehicular auxiliary machine comprising an important part having a function necessary for traveling of the vehicle, wherein the partition member and the dash panel are Between them.

  According to a third aspect of the present invention, in the front body structure of the vehicle according to the first or second aspect, the partition member is provided with a front inclined portion that is inclined so that the side end portion is positioned forward in a plan view. In addition, the vehicular auxiliary machine is disposed behind the front inclined portion.

  According to a fourth aspect of the present invention, in the front body structure of the vehicle according to the first aspect, the partition member is provided with a rear inclined portion that is inclined so that the side end portion is located rearward in a plan view. The vehicle accessory is disposed in front of the rear inclined portion.

  According to a fifth aspect of the present invention, in the vehicle front body structure according to any one of the first to fourth aspects, the in-vehicle battery vehicle device is disposed at a side position of the power train. .

  According to a sixth aspect of the present invention, in the vehicle front body structure according to any one of the first to fourth aspects, the vehicle device comprising the hydraulic control device for the anti-lock brake system is located on the side of the power train. It is arranged at the position.

  According to a seventh aspect of the present invention, in the vehicle front body structure according to any one of the first to sixth aspects, a pair of left and right front side frames extend in the longitudinal direction of the vehicle body in the engine room. The partition member is disposed so as to connect the left and right front side frames.

  The invention according to claim 8 is the vehicle front body structure according to any one of claims 1 to 7, wherein the power train is disposed vertically in the engine room, and And a transmission connected to the rear thereof.

  In the invention according to claim 1, by arranging a part of the power train in the recessed portion of the dash panel, the power train, which is a heavy object in the engine room, is placed as far as possible on the rear side of the vehicle. Therefore, by positioning the center of gravity of the vehicle on the center side of the vehicle body, it is possible to effectively reduce the yaw moment of inertia that acts when the vehicle is running and to improve the steering stability. In addition, the partition member is installed in the engine room where space is provided by the power train being disposed on the rear side of the vehicle to partition the front portion of the power train in the front-rear direction, and the partition member. Since the vehicle auxiliary equipment is disposed at the side position of the power train at a position overlapping with the front view, the impact load is effectively absorbed by deforming the front end of the vehicle body at the time of a vehicle collision. Has an advantage that it can be effectively prevented from being broken by suppressing the vehicle auxiliary machine from being destroyed by the partition wall member.

  In the invention according to claim 2, it is effective to prevent the vehicle from running by preventing the vehicular auxiliary equipment consisting of important parts from being destroyed in accordance with the impact load acting upon the collision of the vehicle. There is an advantage that can be prevented.

  In the invention which concerns on Claim 3, the installation space of the auxiliary equipment for vehicles provided in the side position of the said power train, the partition member, ensuring the installation space of the auxiliary equipment for power trains in the front side of the said partition member, A sufficient distance can be ensured between the two, so that the partition member can be retracted in response to the deformation of the front end of the vehicle body at the time of a vehicle collision, so that the impact load can be effectively absorbed and the partition wall can be absorbed. Even when the member moves backward, there is an advantage that the front inclined portion can be prevented from interfering with the vehicular auxiliary machine located in the installation space.

  In the invention which concerns on Claim 4, the said partition member is located in the back side of an engine room, The installation space of the auxiliary machine for vehicles and the impact-absorbing part at the time of a collision are ensured in the front side, and at the time of a collision When a pressing force that causes the vehicular auxiliary machine to move backward according to an impact load is applied, the vehicular auxiliary machine can be moved backward while moving diagonally outward along the rearward inclined portion. There is an advantage that it is possible to prevent the occurrence of a situation such as a collision with the power train caused by the vehicle auxiliary machine made of the on-vehicle battery or the like receding straight according to the impact load acting upon the collision.

  In the invention according to claim 5, the vehicular auxiliary machine composed of the in-vehicle battery is destroyed due to an impact load acting at the time of the collision of the vehicle, and the vehicle cannot run, or the in-vehicle battery having a predetermined weight is There is an advantage that it is possible to effectively prevent the occurrence of a situation where the vehicle is pushed rearward and enters the vehicle interior.

  In the invention according to claim 6, there is provided a hydraulic control device having a predetermined weight, in which the vehicular auxiliary equipment including the hydraulic control device is destroyed due to an impact load that is applied when the vehicle collides, and the vehicle cannot travel. There is an advantage that it is possible to effectively prevent the occurrence of a situation where the vehicle is pushed rearward of the vehicle and enters the vehicle interior.

  In the invention according to claim 7, since the pair of left and right front side frames disposed in the engine room are connected to each other by the partition member, the front-rear direction intermediate portion of the front side frame is more effective by the partition member. When the vehicle is running, a large load is input to the front side frame from the front wheels via the suspension member. There is an advantage that it can be improved.

  In the invention according to claim 8, since the power train having the engine main body and the transmission, which are heavy objects arranged vertically in the engine room, can be arranged on the rear side of the vehicle as much as possible, By positioning the center of gravity of the vehicle on the center side of the vehicle body, it is possible to effectively reduce the yaw moment of inertia that acts when the vehicle is traveling and to improve the steering stability.

  1 to 4 show a first embodiment of a vehicle front body structure according to the present invention. This vehicle is provided with a dash panel 3 that partitions the vehicle compartment 1 and the engine room 2, and a front end portion of the floor panel 4 is connected to a lower end portion of the dash panel 3. A tunnel portion that is formed in the vehicle width direction center portion of the dash panel 3 to be recessed toward the rear side of the vehicle body and that bulges upward in the vehicle width direction center portion of the floor panel 4. 6 and a driver's seat 7 and a passenger seat 8 are disposed on the left and right sides thereof.

  In the engine room 2, a pair of left and right front side frames 9, 9 are disposed so as to extend in the front-rear direction of the vehicle body, and a bumper reinforcement 10 is installed at the front end thereof so as to extend in the vehicle width direction. Has been. In addition, a power train 11 having an engine main body 12 made of a rotary engine or the like arranged in a vertical manner and a transmission 13 connected to the rear thereof is arranged in the rear portion of the engine room 2. .

  The rear portion of the engine body 12 is disposed in a recessed portion 5 formed in the dash panel 3, and the transmission 13, the propeller shaft 14 connected thereto, and the power plant frame 15 are connected to the tunnel. It is disposed in the part 6. The driving force of the power train 11 is transmitted to the rear wheel (not shown) via the propeller shaft 14 so that the rear wheel is driven.

  In addition, a partition member 19 that extends in the vehicle width direction so as to connect the left and right front side frames 9 and 9 to each other and divides the front portion of the power train 11 in the front-rear direction is provided at the front portion of the power train 11. Is provided. The partition member 19 is formed of a material having a predetermined rigidity and heat shielding property, such as carbon fiber resin or aluminum alloy, and as shown in FIG. 5, the upper member 20 and the lower member 21 divided into upper and lower parts. It is comprised by.

  That is, the left and right ends of the upper member 20 are detachably attached to the vehicle inner wall surface of the front side frame 9 and the vehicle inner wall surface of the apron reinforcement 22 disposed above the front side frame 9 via mounting bolts or the like. Mounting brackets 23, 23 are provided. Further, both the left and right ends of the lower member 21 are detachably attached to the front surface of the suspension cross member 24 for the front wheel to which a suspension arm or the like (not shown) is attached via attachment bolts or the like. The front surface of the suspension cross member 24 is covered by 21.

  Then, by attaching the left and right ends of the upper member 20 to the mounting brackets 23, 23, the upper member 20 is installed so as to connect the front side frame 9 and the apron reinforcement 22 with the lower portion. The suspension cross member 24 with the member 21 attached to the front surface is fixed to the front side frame 9, so that the lower end portion of the upper member 20 and the upper end portion of the lower member 21 are abutted with each other, and the front portion of the power train 11 is defined. A partition wall member 19 is formed to be divided in the front and rear directions.

  On the front side of the partition member 19, a heat exchanger having a power train auxiliary machine 25 made of an exhaust gas purifying catalyzer, etc., a heat exchanger cooling heat exchanger body 16 made of a radiator, etc., and a cooling fan 17 are provided. 18 are arranged. Further, at the upper end portion of the lower member 21, through holes 27 and 28 through which the exhaust pipe 26 connecting the power train auxiliary machine 25 to the power train 11 is inserted, and cooling water supply to the heat exchanger body 16 A tube insertion hole (not shown) is formed.

  The exhaust pipe 26 includes a front extension 29 extending from the one side surface of the engine body 12 to the front side of the vehicle body, and a side extension extending from the front end portion toward the other side of the engine body 12 in the vehicle width direction. Part 30 and a rear extension 31 extending from the side end part to the rear side of the vehicle body. And the front extension part 29 and the back extension part 31 of the said exhaust pipe 26 are installed in the state which penetrated the insertion part which consists of the insertion holes 27 and 28 formed in the connection part of the said upper member 20 and the lower member 21. As shown in FIG. As a result, the powertrain auxiliary machine 25 provided in the side extension 30 of the exhaust pipe 26 is arranged on the front side of the partition wall member 19.

  Further, at a side position of the power train 11 that overlaps with a side portion of the partition wall member 19 in front view, important parts having functions necessary for traveling of the vehicle, for example, an in-vehicle battery 35, an anti-lock A vehicular auxiliary machine comprising a hydraulic control unit (hydraulic unit) 36 for the brake system or a fuel pump (not shown) is disposed on the front side frame 9 between the partition wall member 19 and the dash panel 3. ing.

  As described above, the dash panel 3 that partitions the vehicle compartment 1 and the engine room 2 is provided with the recessed portion 5 that is recessed toward the rear side of the vehicle body, and the power train 11 that drives the wheels in the recessed portion 5 is provided. In the vehicle in which the section is disposed, a partition wall member 19 that divides the front portion of the power train 11 in the front-rear direction is extended in the vehicle width direction in the engine room 2 and overlaps with the partition member 19 in a front view. Since the vehicle auxiliary equipment including the in-vehicle battery 35 and the like is disposed at the side position of the power train 11 at the position, the power train 11 can be disposed on the rear side of the vehicle to improve steering stability, There is an advantage that the vehicular auxiliary machine arranged in the engine room 2 can be effectively prevented from being damaged at the time of a vehicle collision.

  That is, the rear portion of the engine main body 12 constituting the power train 11 is disposed in the recessed portion 5 of the dash panel 3, thereby being a heavy article vertically disposed in the engine room 2. Since the power train 11 having the engine body 12 and the transmission 13 can be disposed as far as possible on the rear side of the vehicle, the vehicle's center of gravity is located on the center side of the vehicle body, so Therefore, it is possible to effectively reduce the yaw moment of inertia to improve steering stability and running stability.

  And in the said 1st Embodiment, the said partition member 19 is installed in the engine room 2 in which the power train 11 was arrange | positioned in the back side of a vehicle, and the space was produced, and the front site | part of the power train 11 The vehicle compartment 35 and the hydraulic control device 36 for the anti-lock brake system, which are important parts having functions necessary for running the vehicle, are formed between the partition wall member 19 and the dash panel 3. Since the vehicular auxiliary machine is disposed at a side position of the power train 11 at a position overlapping the partition wall member 19 in a front view, the front side frame 9 positioned at the front portion of the partition wall member 19 in the event of a vehicle collision. The impact load is effectively absorbed by deforming the front end of the vehicle body including the front portion of the vehicle, and the impact load is From affecting the installation unit can be suppressed by the partition member 19. Therefore, the vehicular auxiliary equipment including the in-vehicle battery 35 and the hydraulic control device 36 etc. is destroyed by the impact load acting at the time of the collision of the vehicle, and the vehicle cannot be traveled, or for these vehicles having a predetermined weight. There is an advantage that it is possible to effectively prevent the situation in which the auxiliary machine is pushed to the rear side of the vehicle and enters the passenger compartment 1.

  Further, as shown in the first embodiment, a pair of left and right front side frames 9 and 9 disposed in the engine room 2 are connected to each other by the partition member 19 in order to ensure the rigidity of the front vehicle body. In the case of the configuration, the front end frames 9 and 9 are connected to each other in the front-rear direction middle portion of the front side frames 9 and 9 that are connected to each other through the dash panel 3 and connected to each other through the bumper reinforcement 10. The partition member 19 can be effectively reinforced. Therefore, even when a large load is input to the front side frames 9, 9 from the front wheels via the suspension member during traveling of the vehicle, the front body is prevented from being deformed and the steering stability is effectively improved. There is an advantage that it can be improved.

  Further, in the first embodiment, the powertrain auxiliary machine 25 made of an exhaust gas purifying catalyzer or the like is disposed in front of the partition wall member 19, and the powertrain auxiliary machine 25 is used as the powertrain 11. Since the insertion portion including the insertion holes 27 and 28 of the front extension portion 29 and the rear extension portion 31 of the exhaust pipe 26 to be connected is formed in the partition member 19, reaction heat and noise generated in the powertrain auxiliary machine 25 are There is an advantage that the partition member 19 can effectively prevent propagation to the rear part in the engine room 2 or the passenger compartment. Moreover, since the powertrain auxiliary machine 25 can be effectively cooled by the traveling wind introduced into the engine room 2 including the opening portion of the front grille, etc., the powertrain auxiliary machine 25 can respond to the reaction heat. It is possible to prevent heat deterioration early due to excessive heating, and to effectively prevent the exhaust gas purifying function from being impaired when the temperature of the powertrain auxiliary machine 25 exceeds an appropriate value. There are advantages.

  FIG. 6 shows a second embodiment of a vehicle front body structure according to the present invention. In the second embodiment, the left and right side portions of the partition wall member 19 are provided with front inclined portions 19a and 19a that are inclined so that the side end portions are positioned forward in plan view. Installation spaces H1 and H2 for the vehicle auxiliary devices are provided at the rear. According to this configuration, the installation space H1, H2 for the auxiliary equipment for the vehicle provided at the side position of the power train 11 while securing the installation portion of the auxiliary equipment 25 for the power train on the front side of the partition member 19. A sufficient distance can be ensured between the wall member 19 and the partition wall member 19. Therefore, as the front portion of the front side frame 9 is deformed at the time of a vehicle collision, the partition member 19 is retracted as shown by the phantom line in FIG. 6 so that the impact load can be effectively absorbed. In addition, even when the partition member 19 is retracted, it is possible to effectively prevent the front inclined portions 19a and 19a from effectively interfering with the vehicle auxiliary equipment located in the installation spaces H1 and H2. There is.

  FIG. 7 shows a third embodiment of a front body structure of a vehicle according to the present invention. In the third embodiment, the left and right side portions of the partition wall member 19 are provided with rear inclined portions 19b and 19b that are inclined so that the side end portions are located rearward in a plan view, and the rear inclined portions 19b, In front of 19b, an on-vehicle battery 35 or an auxiliary machine for a vehicle including the hydraulic control device 36 for the anti-lock brake system is disposed. According to this configuration, the partition member 19 is positioned on the rear side of the engine room 2, so that the installation space for the vehicular auxiliary machine and the shock absorbing portion at the time of the collision are secured on the front side thereof, and at the time of the collision When a pressing force is applied to retract the vehicular auxiliary machine composed of the in-vehicle battery 35 or the like according to the impact load of the vehicle, the vehicular auxiliary machine is moved obliquely outward along the rearward inclined portion 19b. It can be retreated while. Therefore, it is effective that the vehicular auxiliary machine including the in-vehicle battery 35 and the like retreats straight along with the partition wall member 19 according to the impact load acting at the time of the vehicle collision, and so on. There is an advantage that can be prevented.

  In each of the above embodiments, a part of the power train 11 including the engine main body 12 arranged vertically in the engine room 2 and the transmission 13 connected to the rear thereof is formed on the dash panel 3. Since the engine main body 12 and the transmission 13 which are heavy objects are arranged as far as possible on the rear side of the vehicle as far as possible, the center of gravity of the vehicle is placed on the center side of the vehicle body. By positioning, there is an advantage that the yaw moment of inertia acting when the vehicle is traveling can be effectively reduced and the steering stability can be improved.

1 is a side cross-sectional view showing a first embodiment of a front body structure of a vehicle according to the present invention. It is a top sectional view showing a 1st embodiment of the above-mentioned front part body structure. It is front sectional drawing which shows 1st Embodiment of the said front part vehicle body structure. It is the sectional view on the AA line of FIG. It is a disassembled perspective view which shows specific structures, such as a partition member. It is a plane sectional view showing a 2nd embodiment of the front body structure of the vehicle concerning the present invention. It is a plane sectional view showing a 3rd embodiment of the front body structure of the vehicle concerning the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Car compartment 2 Engine room 3 Dash panel 5 Recessed part 9 Front side frame 11 Power train 12 Engine main body 13 Transmission 19 Partition member 19a Front inclination part 19b Back inclination part 35 Car-mounted battery (vehicle auxiliary machine)
36 Hydraulic control device (vehicle auxiliary equipment)

Claims (8)

  In the vehicle in which the dash panel that partitions the vehicle compartment and the engine room is provided with a recessed portion that is recessed toward the rear side of the vehicle body, and a part of the power train that drives the wheels is disposed in the recessed portion. In the engine room, a partition member that divides the front part of the power train in the front-rear direction is extended in the vehicle width direction, and at the position overlapping the partition member in a front view, the side wall of the power train is supplemented to the vehicle. A vehicle body structure for a front part of a vehicle, characterized in that a machine is arranged.   2. The front of a vehicle according to claim 1, wherein the auxiliary machine for the vehicle is an important part having a function necessary for traveling of the vehicle, and is disposed between the partition member and the dash panel. Body structure.   The partition member is provided with a front inclined portion that is inclined so that a side end portion is positioned forward in a plan view, and the vehicular auxiliary device is disposed behind the front inclined portion. The front body structure of the vehicle according to claim 2.   The partition member is provided with a rear inclined portion that is inclined so that a side end portion is located rearward in a plan view, and the vehicle auxiliary device is disposed in front of the rear inclined portion. The front body structure of the vehicle according to claim 1.   The vehicle front body structure according to any one of claims 1 to 4, wherein the vehicle device is an in-vehicle battery.   The vehicle front body structure according to any one of claims 1 to 4, wherein the vehicle equipment is a hydraulic control device for an antilock brake system.   A pair of left and right front side frames are disposed in the engine room so as to extend in the front-rear direction of the vehicle body, and the partition member is disposed so as to connect the left and right front side frames. The front body structure of a vehicle according to any one of claims 1 to 6.   The said power train was provided with the engine main body arrange | positioned vertically in an engine room, and the transmission connected to the back, The one of Claims 1-7 characterized by the above-mentioned. Front body structure of the vehicle.

Images