JP2009220726A - Vehicle hood structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vehicle hood structure having excellent pedestrian protective performance while a large air intake opening is formed in the vehicle width direction. <P>SOLUTION: A longitudinal frame 20 and a longitudinal frame 22 are arranged on both sides in the vehicle width direction of an opening 14B, and extend in the longitudinal direction of a vehicle of a hood inner 10B. The longitudinal frames 20, 22 are joined with both ends in vehicle width directions of transverse frames 16A, 16B, and the strength of the entire hood inner 10B is secured by forming a substantially ladder-shaped pattern as a whole. A fixing member 24 for fixing a bulge 12 to the hood inner 10B is composed of a boss 24A, a bolt 24B and a nut 24C, and the boss 24A fixes the bulge 12 on the hood inner 10B at a predetermined space. The boss 24A has an brittle structure in which the strength is intentionally reduced, and the brittle structure has the rigidity and the strength for buckling with a load smaller than that of the bulge 12 against an input from an upper side of a vehicle body to the bulge 12. Thus, the boss 24A is buckled against the input from an upper direction of the vehicle body before the bulge 12 is buckled. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a vehicle hood structure.

  Conventionally, there is an engine hood having an opening for cooling an intercooler, particularly in a turbo engine vehicle equipped with an intercooler in an engine room. If the opening is divided into a plurality of parts, the intake amount is reduced and the intake path is complicated. Therefore, it is desirable to provide one having a large opening area.

Further, in the structure in which the longitudinal bone as the strength member is provided over the entire hood, it is difficult to increase the opening area of the opening, and thus a structure in which the longitudinal bone is divided before and after the opening is required. In such an engine hood, there is a structure in which a weak part is intentionally provided in a part of the strength member from the viewpoint of pedestrian protection (see, for example, Patent Documents 1 and 2).
JP 2000-001182 A JP-T-2004-535983

  However, in the above structure, when the opening is covered with a resin bulge, it is difficult to predict how the resin product is broken, and thus it is difficult to predict the generated load. Also, in the structure where the longitudinal bone is divided before and after the opening, if the strength is lowered too much, the deformation stroke at the time of input becomes larger than the upper direction of the vehicle body, and even components such as an intercooler provided directly under the opening There is a possibility that there is no room in the distance.

  In view of the above-described facts, the present invention has an object to provide a hood structure for a vehicle having excellent pedestrian protection performance while having a large intake opening in the vehicle width direction.

  The vehicle hood structure according to the first aspect of the present invention is a vehicle hood structure including an outer member that constitutes a vehicle body outer surface of the hood, and an inner member that is disposed inside the outer member. A first opening provided in the outer member and extending in the vehicle width direction, a second opening provided in the inner member and overlapping the first opening in plan view, and the first opening A bulge that covers the vehicle from the front side of the vehicle body, the bulge is fixed to the inner member with a gap therebetween, a fixing member that is less rigid than the bulge, and a vehicle adjacent to the front side of the vehicle body of the second opening. A first transverse bone provided in the width direction, a second transverse bone provided in the vehicle width direction adjacent to the rear side of the vehicle body of the second opening, and from the middle of the first transverse bone Between the first vertical bone extending forward of the vehicle body and the second horizontal bone A pair of second longitudinal bones extending rearward of the vehicle body and the first and second lateral bones are coupled to both sides of the second opening in the vehicle width direction and extended in the vehicle longitudinal direction. And a third longitudinal bone.

  According to the above configuration, the outside of the opening is covered with a bulge, and the front and rear ends of the opening of the inner member are surrounded by the first and second horizontal bones, and both sides of the opening are surrounded by the third vertical bones; The fixing member that fixes the bulge to the inner member is lower in strength than the bulge itself, so that the fixing member breaks during input and sufficient load is generated, and the vertical and horizontal bones adjacent to the opening are placed Thus, the hood itself can have a vehicle hood structure with sufficient strength.

  According to a second aspect of the present invention, there is provided a vehicle hood structure according to the first aspect, wherein a supercharger intercooler is provided immediately below the second opening.

  According to the above configuration, since the intercooler is cooled by the outside air introduced from the opening, the intercooler can be provided directly above the engine instead of the front end of the vehicle body, the compressed air is sufficiently cooled, and the efficiency is improved. Good supercharging can be done.

  Since the vehicle hood structure according to the present invention has the above-described configuration, an excellent effect of being excellent in pedestrian protection performance while having a large intake opening in the vehicle width direction is obtained.

<Outline of structure>
An embodiment of a vehicle hood structure according to the present invention will be described with reference to FIGS.

  In each figure, the arrow FR indicates the front direction of the vehicle body, the arrow RE indicates the rear direction of the vehicle body, the arrow UP indicates the upward direction of the vehicle body, the arrow IN indicates the inner side, and the arrow OUT indicates the outer side.

  1 and 2 show an engine hood 10 having a vehicle hood structure according to an embodiment to which the present invention is applied.

  As shown in FIG. 1, an engine hood 10 disposed so as to cover the engine room 13 on the front upper side of the vehicle body 11 includes a hood outer 10A that covers the upper side of the vehicle body, that is, the outer side, and the hood outer 10A from the lower side, that is, the inner side. The supporting hood inner 10B is integrated with a predetermined interval, and is supported on the vehicle body 11 by a hinge member (not shown) so as to be opened and closed.

  The hood outer 10A is provided with a substantially rectangular opening 14A having a longitudinal direction in the vehicle width direction at a substantially central portion in the vehicle width direction and the vehicle body front-rear direction, and a bulge formed with a material such as a resin at the periphery of the opening 14A. 12 covers and supplements the strength in the vicinity of the opening 14A and arranges the design on the appearance.

  The hood inner 10B is provided with an opening 14B at a position corresponding to the opening 14A so as to become an opening 14 that penetrates the engine hood 10 when integrated with the hood outer 10A. A lateral bone 16A is provided adjacent to the opening 14B on the vehicle body front side of the opening 14B, and a lateral bone 16B is provided adjacent to the opening 14B on the vehicle body rear side. The engine hood 10 as a whole bears the strength in the vehicle width direction particularly near the opening 14B.

  A plurality of vertical bones 18A are provided on the front side of the lateral bone 16A in the vehicle longitudinal direction so as to be substantially orthogonal thereto, and extend to the vicinity of the front end of the hood inner 10B. The longitudinal bone 18A secures the strength on the front side of the vehicle body from the opening 14B. Similarly, a plurality of vertical bones 18B are provided on the rear side of the lateral bone 16B in the vehicle longitudinal direction so as to be substantially orthogonal thereto, and extend to the vicinity of the rear end of the hood inner 10B. The longitudinal bone 18B ensures the strength of the rear side of the vehicle body from the opening 14B.

  Longitudinal bones 20 and longitudinal bones 22 are disposed on both sides in the vehicle width direction of the opening 14B, and extend in the longitudinal direction of the vehicle body of the hood inner 10B. The longitudinal bone 20 and the longitudinal bone 22 are joined to both ends of the transverse bone 16A and the transverse bone 16B in the vehicle width direction, and as a whole, the transverse bone 16A and the transverse bone 16B, and the longitudinal bone 20 and the longitudinal bone 22 form a substantially ladder type pattern. By doing so, the strength of the entire food inner 10B is secured.

  FIG. 3 shows an AA cross section of the hood inner 10B shown in FIG.

  As shown in FIG. 3, the horizontal bone 16A and the horizontal bone 16B are arranged with a step in the height direction in order to clear the opening width (opening height) of the opening 14B in the vertical direction of the vehicle body. That is, the horizontal bone 16B is high by the height of the opening, and the horizontal bone 16A is low in the forward direction. As a result, the opening 14 has a predetermined opening area as viewed from the front from the front of the vehicle body, and is thus structured to receive traveling wind.

  As shown in FIG. 3, a duct 26 is provided on the vehicle body rear lower side of the opening 14 </ b> B, and traveling wind introduced from the opening 14 is combined with a duct seal 28 provided on the vehicle body lower end of the duct 26. It is introduced into the engine room 13. An intercooler 30 is provided in the engine room 13 immediately below the opening 14B, and cools high-temperature compressed air that is compressed by a supercharger (not shown) and sent to the engine 32.

  The peripheral edge of the opening 14A is covered with a bulge 12 to ensure strength and to ensure design. The bulge 12 is molded of resin or the like, and has a shape that also acts as an aerodynamic member that introduces traveling wind from the front of the vehicle body into the opening 14.

  The bulge 12 covers the peripheral edge of the opening 14A and is fixed to the hood inner 10B by the fixing member 24 shown in FIG. The fixing member 24 includes a boss 24A, a bolt 24B, and a nut 24C. The boss 24A fixes the bulge 12 on the hood inner 10B with a predetermined interval.

  The boss 24A has, for example, a structure in which a hole 25 is provided as shown in FIG. 4A, or a fragile structure in which the strength is intentionally reduced by a method such as thinning or using a thin plate member. It has a box boss shape, and the strength and rigidity are set so that the boss 24 </ b> A buckles with a smaller load than the bulge 12 with respect to the input to the bulge 12 from the upper side of the vehicle body. Or it is good also as structures, such as an energy absorption bracket which has a cross section of a substantially pantograph shape. As a result, as shown in FIG. 4B, the boss 24A is first buckled before the bulge 12 buckles with respect to the input 40 from above the vehicle body.

<Effect>
Next, operations and effects of the embodiment of the present invention will be described.

  As shown in FIGS. 1 and 2, when the opening 14 is provided at the approximate center in the vehicle width direction and the vehicle longitudinal direction of the engine hood 10, the longitudinal bone as a strength member is passed near the center in the vehicle width direction. I can't. That is, as shown in FIG. 5, the hood inner provided with the opening has a strength member in the vicinity of the center as compared with the structure in which the hood inner 110B in the vicinity of the center of the engine hood is provided with the transverse bone 116 and the longitudinal bone 118 as strength members. Cannot be placed. For this reason, when there is an input from above the vehicle body, sufficient strength cannot be secured and the deformation stroke of the hood inner becomes large, and there is a margin in the distance to the components such as the intercooler 30 provided directly below the opening 14. There was a risk that it would disappear.

  In the present embodiment, the transverse bone 16A and the transverse bone 16B, which are strength members of the hood inner 10B, are arranged before and after the opening 14B, and both ends of the transverse bone 16A and the transverse bone 16B in the vehicle width direction are the longitudinal bone 20, The strength of the engine hood 10 is ensured by a so-called ladder structure that is coupled to the motor 22. Further, a vertical bone 18A is provided in the front direction of the vehicle body from the horizontal bone 16A, and a vertical bone 18B is provided in the rear direction of the vehicle body from the horizontal bone 16B, thereby ensuring further strength of the hood inner 10B.

  With the above structure, the engine hood 10 as a whole has an opening 14 near the center, but the hood inner 10B has a strength to generate an appropriate load with respect to an input from above the vehicle body, and protects pedestrians. The engine hood 10 having excellent performance can be obtained.

  Also, the bulge 12 that covers the peripheral edge of the opening 14A in the hood outer 10A is usually made of resin-molded parts. However, the resin-molded member predicts the occurrence of deformation stroke and load at the time of input compared to sheet metal. There was a difficult drawback.

  In the present embodiment, as shown in FIG. 4 (A), the bulge 12 is fixed to the hood inner 10B with a fixing member 24 at a predetermined interval, so that an input 40 from above the vehicle body to the bulge 12 is received. Even if a sufficient load is not generated in the bulge 12, a load can be generated in the fixing member 24.

  That is, by using the boss 24A having a fragile structure in advance for the fixing member 24, as shown in FIG. 4B, when the input 40 from above the vehicle body to the bulge 12 is generated, the boss 24A buckles and generates a load. In addition, it is not necessary to generate a sufficient load in the bulge 12, and the engine hood 10 having excellent pedestrian protection performance can be obtained.

  With the above configuration, when the intercooler 30 is provided in the engine room 13, it can be provided immediately above the engine 32. For this reason, compared with a structure in which the intercooler 30 is provided at the front end of the vehicle body, it is not necessary to extend the chassis or secure a space for auxiliary devices, and therefore, the current vehicle body can be used without changing the design. Thereby, production cost and development cost can be reduced.

  The embodiments of the present invention have been described above with reference to the embodiments. However, these embodiments are merely examples, and various modifications can be made without departing from the scope of the invention. Further, it goes without saying that the scope of rights of the present invention is not limited to these embodiments and can be implemented in various modes without departing from the gist of the present invention.

  That is, although the engine hood provided with the intercooler for the supercharger has been described as an example in the above embodiment, the present invention can be applied to any hood structure provided with a through-hole without being limited thereto. In other words, it can be applied not only to cooling an intercooler but also to a hood equipped with a cooling duct for the entire engine room, for cooling radiators, brakes, etc., or an air intake for a carburetor or injection.

It is a perspective view which shows an engine hood provided with the hood structure of the vehicle which concerns on embodiment of this invention. It is the top view which showed the food inner shown by FIG. It is an expanded sectional view which shows the AA cross section of FIG. It is an expanded sectional view which shows the structure and effect | action of a fixing member shown by FIG. It is a top view which shows the food inner in the conventional engine hood.

Explanation of symbols

10 Engine Hood 10A Hood Outer 10B Hood Inner 12 Bulge 13 Engine Room 14 Opening 14A Opening 14B Opening 16A Horizontal Bone 16B Horizontal Bone 18A Vertical Bone 18B Vertical Bone 20 Vertical Bone 22 Vertical Bone 24 Fixing Member 24A Boss 30 Intercooler 32 Engine

Claims (2)

A vehicle hood structure comprising an outer member that constitutes a vehicle body outer surface of a hood, and an inner member disposed inside the outer member,
A first opening provided in the outer member and extending in the vehicle width direction;
A second opening provided on the inner member and overlapping the first opening in plan view;
A bulge that covers the first opening from the front side of the vehicle body;
Fixing the bulge to the inner member with a gap, and a fixing member having a lower rigidity than the bulge;
A first transverse bone provided in the vehicle width direction adjacent to the vehicle body front side of the second opening;
A second transverse bone provided in the vehicle width direction adjacent to the vehicle body rear side of the second opening;
A first longitudinal bone extending from the middle of the first transverse bone to the front of the vehicle body;
A second longitudinal bone extending from the middle of the second transverse bone to the rear of the vehicle body;
A pair of third longitudinal bones that connect the first and second transverse bones on both sides of the second opening in the vehicle width direction and extend in the longitudinal direction of the vehicle body;
A vehicle hood structure characterized by comprising: The vehicle hood structure according to claim 1, wherein an intercooler for a supercharger is provided immediately below the second opening.

Images