JP2017190105A - Vehicle front structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a front structure of a vehicle capable of suppressing the intrusion of water into an intake duct and suppressing a reaction force received by a pedestrian at the time of a frontal collision. SOLUTION: A front structure 1 of a vehicle 100 is provided at a position lower than an intake duct 10 having an intake port 10a for introducing air for supplying an engine and an intake port 10a of the intake duct 10, and is provided in the intake port 10a. A water-impervious member 21 that blocks the upward flow of water is provided, and the water-impervious member 21 is provided in advance in an interference avoidance space on the rear side of the vehicle due to a collision load at the time of a frontal collision of the vehicle 100. It is configured to move 8 to the rear of the vehicle. [Selection diagram] Fig. 1

Description

  The present invention relates to a front structure of a vehicle.

  Patent Document 1 below discloses an example of a front structure of a vehicle. The water shielding plate constituting the front structure is attached at a higher position than the opening of the bumper in the engine room. The water shielding plate is for preventing water that has entered the engine room from the opening of the bumper and flowed upward when the vehicle travels in a submerged channel or the like from entering the intake duct. Further, the water shielding plate extends in the vehicle front-rear direction so as to close the front-rear distance between the bumper and the heat dissipation device (device including a condenser, an auxiliary fan, and the like).

JP-A-8-175195

  By the way, when a pedestrian collides with the front side of the vehicle, the pedestrian receives a reaction force from the vehicle. If this reaction force becomes excessive, the impact on the pedestrian will increase. Therefore, when designing the front structure of the vehicle, it is necessary to keep in mind that the reaction force that the colliding pedestrian receives from the vehicle is minimized to protect the pedestrian.

However, when based on the viewpoint of protecting pedestrians, the front structure disclosed in Patent Document 1 has the following problems.
That is, the water shielding plate constituting the front structure has a height corresponding to the pedestrian's legs (typically, the pedestrian's legs around the knees and shins) in the engine room. It extends in the direction and is interposed between the bumper and the heat dissipation device. For this reason, even if this water shielding board tries to move to the rear of the vehicle due to a collision load at the time of a frontal collision of the vehicle, this movement is limited by the heat dissipation device. Therefore, since the water shielding plate becomes a resistance against a collision load at the time of a frontal collision of the vehicle and a reaction force is generated, there may be a problem that a reaction force (impact) that the pedestrian's leg receives from the vehicle increases.

  The present invention has been made in view of such a problem, and provides a vehicle front structure that can suppress the intrusion of water into an intake duct and can reduce the reaction force that a pedestrian receives during a frontal collision. It is something to try.

One embodiment of the present invention provides:
An intake duct having an intake port for introducing air for engine supply;
A water-impervious member that is provided at a lower position than the intake port of the intake duct and blocks an upward flow of water toward the intake port;
With
The front structure of the vehicle is configured such that the water shielding member is configured to move to an interference avoidance space provided in advance on the vehicle rear side of the water shielding member due to a collision load at the time of a frontal collision of the vehicle. It is in.

  In the vehicle front structure described above, the water-impervious member can prevent water from entering the intake duct by blocking upward water flow toward the intake port of the intake duct. On the other hand, the water-impervious member that has received a collision load at the time of a frontal collision of the vehicle moves rearward in the interference avoidance space. For this reason, it can avoid that a water shielding member becomes resistance with respect to the collision load at the time of the front collision of a vehicle.

  According to the above aspect, it is possible to suppress the intrusion of water into the intake duct and to reduce the reaction force that the pedestrian receives from the vehicle at the time of a forward collision. That is, it is possible to achieve both the water shielding performance by the water shielding member and the pedestrian protection performance.

The perspective view which shows the front part structure of the vehicle of this embodiment. Sectional drawing which looked at FIG. 1 from the arrow A direction. Sectional drawing of the water-impervious mechanism in FIG. Sectional drawing which shows the mode at the time of the front collision of a vehicle in FIG.

  The vehicle front structure preferably includes a support member that slidably supports the water shielding member toward the interference avoidance space. Thereby, the water-impervious member can be reliably moved to the interference avoidance space by the support member.

In the vehicle front structure, the water shielding member has a rearward extending portion that extends rearward from the bumper side of the vehicle body toward the interference avoidance space, and the support member includes the intake air of the vehicle body. A front extension extending from the duct side to the front of the vehicle, wherein the front extension overlaps the rear extension of the water shielding member in the vehicle vertical direction and supports the rear extension from below; It is preferable to be configured as described above.
In this case, since the support member that supports the water shielding member is pressed against the water shielding member by the upward flow of water, the water sealing property at the overlapping portion of the rearward extension portion of the water shielding member and the front extension portion of the support member. Can be improved. Further, the water shielding member has a cantilever structure in which the fixed portion on the bumper side is a fixed end and the rear extending portion is a free end, and the rear extending portion is supported from below by the front extending portion of the support member. Therefore, the cantilever length (length in the vehicle front-rear direction) of the water shielding member can be kept short.

  In the front structure of the vehicle described above, it is preferable that the front extension portion of the support member includes a bent portion that is bent downward from an overlapping portion with the rear extension portion of the water shielding member. As a result, the load caused by the upward water flow can be concentrated on the corner portion that is the boundary portion between the overlapping portion and the bent portion of the support member, and the rear extension portion of the water shielding member and the front portion of the support member can be applied. It is possible to further improve the water sealability in the overlapping portion with the extending portion.

  In the front structure of the vehicle described above, it is preferable that an overlapping portion of the rearward extension portion of the water shielding member and the forward extension portion of the support member extend in parallel with each other. Thereby, the operation of sliding the water shielding member toward the rear of the vehicle is not easily disturbed by the support member, and the water shielding member can be smoothly moved toward the interference avoidance space.

  In the vehicle front structure, a seal member made of a foam mainly composed of synthetic rubber is interposed between the rearward extension portion of the water-impervious member and the forward extension portion of the support member. It is preferable. This foam is a flexible material having a sealing property against water and sound. Therefore, according to the sealing member made of this foam, water and sound are prevented from entering through the overlapping region of the rearward extension portion of the water-impervious member and the forward extension portion of the support member. .

  In the vehicle front structure described above, when the water shielding member is a first water shielding member, the support member is configured as a second water shielding member that blocks the upward flow of water toward the intake port. It is preferable. In this case, by providing the support member for supporting the water-impervious member with the same function as the water-impervious member, the upward water flow toward the intake port of the intake duct is widened using two water-impervious members. Can be blocked.

  In the vehicle front structure, the support member is preferably constituted by a shroud upper cover that covers at least one upper part of an air conditioning condenser and an engine cooling radiator. In this case, it is reasonable that the support member has both the function and the function of the shroud upper cover.

  Hereinafter, the front structure of the vehicle according to the present embodiment will be described with reference to the drawings.

  In the drawings of the present specification, unless otherwise specified, the first direction that is the front-rear direction of the vehicle is indicated by an arrow X, the second direction that is the left-right direction of the vehicle (the vehicle width direction) is indicated by an arrow Y, and the vehicle The third direction which is the vertical direction (vehicle height direction) is indicated by an arrow Z.

  As shown in FIGS. 1 and 2, the front structure 1 of the vehicle 100 according to the present embodiment constitutes a front portion of the vehicle 100, and includes a bumper 2, a grill member 3, a hood 4, and an intake duct 10. , A condenser 11, a radiator 12, and a water shielding mechanism 20.

  The bumper 2 is provided at the forefront of the vehicle 100. The bumper 2 has a function of reducing the impact and vibration at the time of a forward collision of the vehicle 100. The bumper 2 is configured as an integrally molded product made of a synthetic resin material.

  The grill member 3 is attached to the back side of the bumper 2. The grill member 3 has a function of increasing the rigidity of the bumper 2 and suppressing the deformation of the bumper 2 to be small. The grill member 3 is made of a synthetic resin material.

  The hood 4 is disposed above the bumper 2 and is configured to cover the engine room 7 so that it can be opened and closed. This hood 4 is also called “bonnet”.

  The grill member 3 includes an outside air introduction opening 5 for introducing outside air into the engine room 7. The bumper 2 includes an outside air introduction opening 6 for introducing outside air into the engine room 7.

  The outside air introduction opening 6 is arranged below the outside air introduction opening 5 in the third direction Z and is configured such that the opening area thereof exceeds the opening area of the outside air introduction opening 5. For this reason, when the vehicle 100 is traveling on a submerged channel (hereinafter referred to as “flooding”), the momentum of water entering from the outside air introduction opening 6 is the amount of water entering from the outside air introduction opening 5. Exceed.

  An intake duct 10, an air conditioning condenser 11, an engine cooling radiator 12, and a water shielding mechanism 20 are disposed in the engine room 7.

  The intake duct 10 has an intake port 10a for introducing engine supply air supplied to an engine (not shown). The intake port 10a opens toward the front of the vehicle or the upper side of the vehicle.

  The water blocking mechanism 20 has a function of blocking the flow of water that has entered the engine room 7 from the outside air introduction opening 6. The water shielding mechanism 20 is disposed at a position between the outside air introduction opening 5 and the outside air introduction opening 6 in the third direction Z.

  The water-impervious mechanism 20 includes a water-impervious member 21 provided in front of and lower than the intake port 10a of the intake duct 10 in the engine room 7, a support member 22 provided on the rear side of the water-impervious member 21, and a seal. And a member 23. Both the water-impervious member 21 and the support member 22 are preferably made of a synthetic resin material for weight reduction.

  The water-impervious member 21 has a function of blocking the upward flow of water toward the intake port 10a of the intake duct 10 (hereinafter, also simply referred to as “water-impervious function”). The water-impervious member 21 is configured to be positioned at a height corresponding to a pedestrian's leg (a part of the leg around the knee and shin) in the engine room 7.

  Further, an interference avoidance space 8 is provided in advance on the vehicle rear side of the water shielding member 21. The interference avoidance space 8 is formed using a space above the capacitor 11 and the radiator 12, and is a space for avoiding interference between the water shielding member 21 and other members. In other words, other members are excluded from the interference avoidance space 8.

  The size of the interference avoidance space 8 relates to the dimension of the water shielding member 21 (the dimension in the second direction Y and the third direction Z) and the region where the water shielding member 21 is predicted to move when the vehicle 100 collides forward. It is preferably set in advance based on information (typically, information obtained from a collision experiment performed in advance).

  When the water-impervious member 21 receives a collision load at the time of a forward collision of the vehicle 100 (a load received from the bumper 2 side of the vehicle body at the time of the forward collision of the vehicle 100), the water-impervious member 21 moves in the interference avoidance space 8 to the rear of the vehicle. be able to. At this time, the water-impervious member 21 is prevented from interfering with other members by using the interference avoidance space 8, and almost no reaction force is generated by the water-impervious member 21.

  The support member 22 supports the water-impervious member 21 so as to be slidable toward the rear of the vehicle toward the interference avoidance space 8 (hereinafter also simply referred to as “support function”), and the same water-impervious function as the water-impervious member 21 And having.

  The seal member 23 is interposed between the water shielding member 21 and the support member 22, and has a function of sealing between the water shielding member 21 and the support member 22.

  As shown in FIG. 3, the water-impervious member 21 is fixed to the vehicle body at a fixing portion 21 a on the bumper 2 side, and extends rearward from the fixing portion 21 a toward the interference avoidance space 8 toward the rear of the vehicle. Part 21b. For this reason, the water-impervious member 21 has a so-called “cantilevered support structure” in which the fixed portion 21 a is a fixed end and the rearward extending portion 21 b is a free end.

  The fixing portion 21a of the water shielding member 21 is configured as a flat plate-like portion extending along a plane defined by both the second direction Y and the third direction Z. The rear extension 21b of the water shielding member 21 is configured as a flat plate-like portion extending along a plane defined by both the first direction X and the second direction Y.

  Furthermore, the rearward extension part 21b of the water-impervious member 21 has an overlapping part 21c that is inclined upward as it goes toward the extension tip. That is, the overlapping portion 21c is inclined so that the extending tip side of the rear extending portion 21b is a high place and the fixed portion 21a side is a low place.

  The support member 22 is fixed to the vehicle body at a fixing portion 22a on the intake duct 10 side, and has a front extending portion 22b extending from the fixing portion 22a to the front of the vehicle. Therefore, the support member 22 has a so-called “cantilevered support structure” in which the fixed portion 22a is a fixed end and the front extending portion 22b is a free end. The front extension 22b of the support member 22 is configured as a flat plate-like portion extending along a plane defined by both the first direction X and the second direction Y.

  The support member 22 has a front extension portion 22b that overlaps the rear extension portion 21b of the water shielding member 21 in the third direction Z that is the vehicle vertical direction and supports the rear extension portion 21b from below, and the capacitor 11 and It is comprised so that the upper part of both the radiators 12 may be covered. With regard to this configuration, the front extending portion 22b which is a part of the support member 22 also serves as a known shroud door upper cover (cover member).

  The front extending portion 22b of the support member 22 further includes an overlapping portion 22c inclined downward toward the extending tip, and a bent portion 22d bent downward from the overlapping portion 22c. The overlapping portion 22c is configured to overlap with the overlapping portion 21c of the water shielding member 21 in the third direction Z that is the vehicle vertical direction. At this time, the water-impervious member 21 and the support member 22 are configured such that the overlapping portion 21c and the overlapping portion 22c extend in parallel to each other, and the overlapping portion 22c extends, for example, with respect to the horizontal plane S at an inclination angle θ. ing. The bent portion 22d is configured as a flat plate-like portion extending along a plane defined by both the second direction Y and the third direction Z.

  The seal member 23 is interposed between the overlapping portion 21 c of the water shielding member 21 and the overlapping portion 22 c of the support member 22. The seal member 23 is made of a foam (also referred to as “sponge”) whose main component is ethylene / propylene / diene rubber (EPDM rubber) which is a synthetic rubber. This foam is a flexible material having a sealing property against water and sound. Accordingly, the seal member 23 is a water seal member and a sound absorbing member.

  The seal member 23 is fixed to the overlapping portion 22 c of the support member 22 and is in close contact with the overlapping portion 21 c of the water shielding member 21 without being fixed. For this reason, when the water-impervious member 21 moves in the first slide direction R1 or the second slide direction R2 with respect to the support member 22, the seal member 23 is not flexible with the overlapping portion 21c of the water-impervious member 21 due to its flexibility. It slides on the overlapping portion 21c while maintaining a close contact state. For this reason, the above-described sealing performance by the sealing member 23 can be maintained.

  Next, the flow of water that has entered the engine room 7 of the vehicle 100 will be described with reference to FIG.

  When the vehicle 100 is submerged, the water that has entered the engine room 7 from the outside air introduction opening 6 flows upward according to the first flow W1 while rising by the momentum. Thereafter, the water that has reached the water-impervious member 21 is bounced downward by the lower surface of the water-impervious member 21 and flows down according to the second flow W2. Similarly, the water that has reached the support member 22 is bounced downward by the lower surface of the support member 22 and flows down according to the third flow W3. Thereby, the flow of water flowing toward the intake port 10 a is blocked by both the water blocking member 21 and the support member 22. In this case, when the water-impervious member 21 is the first water-impervious member, the support member 22 is configured as a second water-impervious member.

  Further, a load that presses the overlapping portion 22c of the supporting member 22 toward the overlapping portion 21c of the water shielding member 21 acts on the supporting member 22 by the upward fourth flow W4. Accordingly, the overlapping portion 22c of the support member 22 is pressed against the overlapping portion 21c of the water shielding member 21 through the seal member 23 by the fourth flow W4. For this reason, the water-seal property between the overlapping part 21c of the water-impervious member 21 and the overlapping part 22c of the support member 22 is improved.

  At this time, the load due to the upward fourth flow W4 tends to concentrate on the corner portion 22e which is the boundary between the overlapping portion 22c and the bent portion 22d of the support member 22. Therefore, with the help of the bent portion 22d, the overlapping portion 22c can be more strongly pressed toward the overlapping portion 21c. Note that the bent portion 22d of the support member 22 can be omitted when the water sealability between the overlapping portion 21c and the overlapping portion 22c can be maintained at a desired level.

  On the other hand, the water that has entered the engine room 7 from the outside air introduction opening 5 flows downward according to the fifth flow W5 due to gravity. Thereafter, the water reaching the water shielding member 21 flows on the upper surface of the water shielding member 21 according to the sixth flow W6. Here, since the overlapping part 21c of the water-impervious member 21 is inclined so that the fixed part 21a side becomes a low place, the water reaching the water-impervious member 21 easily flows to the fixed part 21a side according to this inclination. .

  According to said embodiment, the following effects are obtained.

  In the front structure 1 of the vehicle 100, the water-impervious member 21 can prevent water from entering the intake duct 10 by blocking the upward water flow toward the intake port 10 a of the intake duct 10. On the other hand, as shown in FIG. 4, when the vehicle 100 collides with the leg of the pedestrian P (a portion of the leg around the knee and shin) due to a frontal collision, The interference avoidance space 8 moves rearward of the vehicle without receiving resistance from other members, except for a slight sliding resistance between the seal member 23 and the seal member 23. At this time, the water shielding member 21 hardly deforms from the state before the front collision. In FIG. 4, with respect to the bumper 2 and the water shielding member 21, the position before the front collision is indicated by a two-dot chain line, and the position after the front collision is indicated by a solid line.

  For this reason, it can avoid that the water-impervious member 21 becomes resistance to the collision load at the time of a forward collision. As a result, water can be prevented from entering the intake duct 10 and the reaction force (impact) received by the pedestrian P's legs from the vehicle 100 at the time of a forward collision can be reduced. That is, it is possible to achieve both the water shielding performance by the water shielding member 21 and the pedestrian protection performance.

  Further, according to the front structure 1 described above, the water shielding member 21 can be reliably moved to the interference avoidance space 8 by the support member 22.

  Moreover, according to said front part structure 1, since the support member 22 which supports the water-impervious member 21 is pressed against the water-impervious member 21 by the upward flow of water, the overlapping portion 21c of the water-impervious member 21 and the support member 22 It is possible to improve the water sealing property between the overlapping portions 22c. Further, the water shielding member 21 has a cantilever structure in which the fixed portion 21 a on the bumper 2 side is a fixed end and the rear extending portion 21 b is a free end. The rear extending portion 21 b extends forward of the support member 22. Since it is supported from below by the portion 22b, the cantilever length (length in the vehicle front-rear direction) of the water shielding member 21 can be kept short.

  Further, according to the front structure 1 described above, a load caused by the upward water flow can be concentratedly applied to the corner portion 22e which is a boundary portion between the overlapping portion 22c and the bent portion 22d of the support member 22, The water sealing property between the overlapping portion 21c of the water shielding member 21 and the overlapping portion 22c of the support member 22 can be further improved.

  Moreover, according to said front part structure 1, since the overlap part 21c of the water-impervious member 21 and the overlap part 22c of the support member 22 are extended mutually parallel, the water-impervious member 21 slides to the vehicle rear. The operation is not easily disturbed by the support member 22, and the water shielding member 21 can be smoothly moved toward the interference avoidance space 8.

  Moreover, according to said front structure 1, since the sealing member 23 is interposed between the water shielding member 21 and the supporting member 22, the overlapping part 21c of the water shielding member 21 and the overlapping part of the supporting member 22 It can suppress that water and a sound penetrate | invade through between 22c.

  Moreover, according to said front part structure 1, by providing the support member 22 for supporting the water-impervious member 21 with the same function as the water-impervious member 21, the two water-impervious members 21 and 22 are used. Thus, the upward flow of water toward the intake port 10a of the intake duct 10 can be blocked over a wide range.

  Moreover, according to said front part structure 1, the support member 22 combines the function and the function of a shroud door upper cover, and is rational.

  The present invention is not limited to the above-described exemplary embodiments, and various applications and modifications can be considered without departing from the object of the present invention. For example, the following embodiments applying the above-described embodiment can be implemented.

  In the above embodiment, the water shielding mechanism 20 including both the water shielding member 21 and the support member 22 has been illustrated, but the support member 22 may be omitted in the water shielding mechanism 20. In this case, only the water shielding member 21 performs the water shielding function.

  In said embodiment, although illustrated about the case where the support member 22 is provided with both a support function and a water-impervious function, it is also possible to adopt a configuration in which the support member 22 has only one of the support function and the water-impervious function. it can.

  In the above embodiment, the case where the seal member 23 is interposed between the water-impervious member 21 and the support member 22 is illustrated, but the seal member 23 may be omitted as necessary. When the seal member 23 is omitted, a configuration in which the water-impervious member 21 is supported by the support member 22 or a configuration in which the water-impervious member 21 and the support member 22 face each other through a gap can be employed.

  In the above-described embodiment, the case where the support member 22 also serves as the shroud door upper cover is illustrated. However, the support member 22 may be configured using a member different from the shroud door upper cover, for example, a part of the intake duct 10. it can. Further, the support member 22 only needs to be configured to cover at least one upper part of the capacitor 11 and the radiator 12.

  In the above embodiment, the case where the overlapping portion 21c of the water shielding member 21 and the overlapping portion 22c of the support member 22 extend in parallel with each other is illustrated, but the overlapping portion 21c and the overlapping portion 22c are different from each other as necessary. A configuration extending in the direction can also be adopted.

DESCRIPTION OF SYMBOLS 1 Front part structure 2 Bumper 8 Interference avoidance space 10 Intake duct 10a Inlet 11 Capacitor 12 Radiator 20 Water shielding mechanism 21 Water shielding member (1st water shielding member)
21b Rear extension part 21c Overlapping part 22 Support member (shrouded upper cover, second water shielding member)
22b Front extension portion 22c Overlap portion 22d Bending portion 23 Seal member 100 Vehicle

Claims (8)

An intake duct having an intake port for introducing air for engine supply;
A water-impervious member that is provided at a lower position than the intake port of the intake duct and blocks an upward flow of water toward the intake port;
With
The front structure of the vehicle is configured such that the water shielding member is configured to move to an interference avoidance space provided in advance on the vehicle rear side of the water shielding member due to a collision load at the time of a frontal collision of the vehicle. .   The vehicle front structure according to claim 1, further comprising a support member that slidably supports the water shielding member toward the interference avoidance space.   The water shielding member has a rearward extending portion that extends rearward from the bumper side of the vehicle body toward the interference avoidance space, and the support member extends from the intake duct side of the vehicle body toward the front of the vehicle. It has a front extension part, and the front extension part is constituted so that it may overlap the back extension part of the water shielding member about the vehicle up-and-down direction, and support the back extension part from the lower part. The front structure of the vehicle according to claim 2.   4. The vehicle front structure according to claim 3, wherein the front extending portion of the support member includes a bent portion bent downward from an overlapping portion with the rear extending portion of the water shielding member.   The front part structure of a vehicle according to claim 3 or 4, wherein an overlapping portion between the rearward extension portion of the water shielding member and the forward extension portion of the support member extends in parallel with each other.   The sealing member which consists of a foam which has a synthetic rubber as a main component is interposed between the back extension part of the water-proof member, and the front extension part of the support member. The front part structure of a vehicle as described in any one of Claims.   The said support member is comprised as a 2nd water-impervious member which interrupts | blocks the flow of the upward water which goes to the said inlet port, when the said water-impervious member is used as the 1st water-impervious member. A vehicle front structure according to claim 1.   The vehicle front structure according to any one of claims 2 to 7, wherein the support member is configured by a shroud door upper cover that covers at least one upper part of an air conditioning condenser and an engine cooling radiator.

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