JP2016078766A - Vehicle air-guiding component, undercover and air-guiding duct - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicle air-guiding component with a structure which has excellent formability and can smoothly guide an air flow on both faces of a substrate section when a vehicle is travelling and to provide an undercover and an air-guiding duct which have the vehicle air-guiding components.SOLUTION: A vehicle air-guiding component 10 has a substrate section 12 which guides an air flow generated while a vehicle is travelling to a rear side of the vehicle. The vehicle air-guiding component 10 is a resin molding product integrated with a rib-slope section 24 which guides a portion of the air flow generated while the vehicle is travelling. The rib-slope section 24 has a plurality of plate-like ribs 22, which are protruded from the substrate section 12 and arranged at intervals in a direction of the air flow with protrusion heights thereof gradually increased toward a downstream side of the air flow, on either one or both of a first air-guiding face 18 and a second air-guiding face 20 of the substrate section 12.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a wind guide component for an automobile, an under cover and a wind guide duct, and in particular, an automotive wind guide component having a good moldability and a structure capable of advantageously guiding an air flow on both sides of a substrate portion. In addition, the present invention relates to an undercover and a wind guide duct made of such a wind guide component for automobiles.

  As is well known, in a vehicle such as an automobile, if the smooth flow of the airflow generated during travel is inhibited, the air resistance is increased, thereby impairing travel stability or fuel consumption. The problem of doing so will be triggered. Therefore, in recent years, automobile parts designed in consideration of aerodynamic performance (aerodynamic performance) and the like have been adopted in various places of vehicles. For example, in the lower part of the vehicle body, an under cover having a flat plate shape as a whole is disposed, and thus air resistance is reduced (aerodynamic performance is improved).

  Such an under cover usually guides an airflow (running wind) generated during traveling on both the upper surface and the lower surface of the vehicle to the rear side of the vehicle when the vehicle is traveling. That is, the air flow (cooling air) in the engine room is guided on the upper surface, while the air flow (traveling air below the vehicle body) that flows downward from the front of the vehicle to the rear is guided on the lower surface. Therefore, it is desirable that such an undercover has a structure in which both the upper surface and the lower surface can smoothly guide the airflow generated during traveling backward.

  Under such circumstances, Japanese Patent Application Laid-Open No. 2005-138690 (Patent Document 1) is an impact absorbing member made of a blow molded product of resin, and the lower portion of the impact absorbing member is a conventional engine undercover. An impact absorbing member has been clarified that performs a part of its function and whose upper surface constitutes a guide surface that guides the air that flows in from the air intake hole to the radiator. However, since the member having such a configuration is formed by blow molding, it inevitably has a hollow portion, and there is a problem that the member itself becomes large, and an under cover such as The manufacturing problem of being unsuitable for molding a part having a flat plate shape as a whole is also inherent.

  On the other hand, in Japanese Patent Application Laid-Open No. 2013-139179 (Patent Document 2), there is an under cover that covers a lower portion of a vehicle, and a guide slope that is provided so that traveling wind introduced on the upper surface side of the main body portion climbs is provided. In addition, a configuration is disclosed in which the slope shape of the guide slope is set so that the traveling wind separated from the guide slope hits an object to be cooled such as an engine.

  However, in such a conventionally proposed undercover, by providing a guide slope on the upper surface of the main body portion formed of a thin plate material, the surface on the opposite side of the guide slope in the main body portion, that is, A concave portion that opens downward is formed on the lower surface. For this reason, there is a problem that the running wind under the vehicle body flowing under the under cover is disturbed and the aerodynamic performance is deteriorated.

JP 2005-138690 A JP 2013-139179 A

  Here, the present invention has been made in the background as described above, and the problem to be solved is that the moldability is good and the both sides of the substrate portion are generated when the automobile is running. An object of the present invention is to provide an automobile wind guide component having a structure capable of smoothly guiding an air flow, and an undercover and an wind guide duct made of such an automobile wind guide component.

  And in this invention, in order to solve such a subject, it consists of a plate-shaped member extended in the vehicle front-back direction, and the surface and the back surface are respectively the airflow which arises at the time of driving | running | working of a motor vehicle on the vehicle rear side. An automotive wind guide component having a board portion that is a first wind guide surface and a second wind guide surface to be guided, wherein either one of the first wind guide surface and the second wind guide surface of the board portion or For both, a plurality of plate-like ribs that protrude from the substrate portion and whose protruding height sequentially increases toward the downstream side of the airflow are arranged at intervals in the flow direction of the airflow. An automotive wind guide component, characterized in that a rib slope portion that guides a part of the airflow generated during travel of the automobile is formed of an integrally formed resin molded product. It is what.

  In the present invention, it is preferable that the tip surfaces of the plurality of plate-like ribs are inclined surfaces that are inclined so that the height gradually increases toward the downstream side of the airflow, In the two plate-like ribs adjacent to each other in the airflow direction of the rib slope portion, the upstream edge portion of the airflow at the front end surface of the plate-like rib on the downstream side of the airflow is upstream of the airflow. It is desirable that the plate-like rib is positioned on a virtual plane on which the front end surface of the plate-like rib is located or on the substrate part side of the virtual plane.

  And in this invention, it is an under cover which consists of the above-mentioned automotive wind guide parts, Comprising: The said lower part of a vehicle front part is a form which the said board | substrate part expands in the front-back direction and the width direction of a vehicle, respectively. The air flow in the engine room taken from the front of the vehicle is guided to the vehicle rear side in the first air guide surface, while the lower portion of the board portion is directed to the front of the vehicle in the second air guide surface. The gist of the present invention is also an undercover that is configured to guide the airflow flowing rearward from the vehicle to the vehicle rear side.

  Further, according to the present invention, there is a wind guide duct having a wind guide component for an automobile as described above, a front bumper installed on the front surface of the vehicle, and a cooling installed on the rear side of the vehicle with respect to the front bumper. In the first wind guide surface, the running wind taken from the front of the vehicle is guided to the cooling system component, while the second wind guide surface The gist duct is also characterized in that it is configured to guide a part of the traveling wind to the rear side of the vehicle.

  As described above, in the vehicle wind guide component according to the present invention, the first and second back surfaces of the board portion each formed of a plate-like member having a first wind guide surface and a second wind guide surface, respectively. A plurality of plate-like ribs whose protruding heights are sequentially increased toward the downstream side of the air flow with respect to either one or both of the air guide surface and the second air guide surface are arranged at intervals. A part of the airflow generated during driving of the automobile is guided by the rib slope portion formed by the above, and the airflow is smoothly guided in an arbitrary direction while suppressing an increase in air resistance. Is possible.

  Moreover, in the wind guide component for automobiles according to the present invention, since the rib slope portion is composed of a plurality of plate-like ribs, a concave portion is formed on the surface on the opposite side of the substrate portion at the formation portion of the rib slope portion. It is never formed. Therefore, on both surfaces of the substrate portion, the airflow generated when the vehicle travels can be smoothly guided without being disturbed, so that the aerodynamic performance can be advantageously improved.

  Furthermore, since the wind guide component for automobiles according to the present invention is constituted by an integral resin molded product in which the rib slope portion as described above is integrally formed, the manufacturing cost is low and the component itself is low. Increase in size is suppressed. In addition, there is an advantage that the moldability (cooling property, dimensional stability, etc.) is good because the structure has no extreme thick portion.

It is plane explanatory drawing which shows an example of the undercover which has a structure according to this invention. It is AA cross-section explanatory drawing in FIG. It is the B section expanded sectional view explanatory drawing in FIG. FIG. 2 is a cross-sectional partial explanatory view schematically showing a vehicle to which the under cover shown in FIG. 1 is attached. FIG. 6 is an enlarged cross-sectional partial explanatory view of a C portion in FIG. 4, showing the flow of airflow on both sides of the substrate portion of the under cover. FIG. 5 is a partial cross-sectional explanatory view corresponding to FIG. 4, schematically showing a vehicle in which an example of a wind guide duct having a structure according to the present invention is arranged. FIG. 7 is an enlarged cross-sectional explanatory view of a D part in FIG. 6, showing the flow of airflow on both sides of the substrate part of the air guide duct (upper side wall part). It is a section explanatory view corresponding to Drawing 2 showing other examples of an undercover which has a structure according to the present invention. FIG. 6 is a cross-sectional explanatory view corresponding to FIG. 2, showing another different example of the undercover having a structure according to the present invention. FIG. 4 is a cross-sectional explanatory view corresponding to FIG. 2, showing another example of an undercover having a structure according to the present invention. FIG. 4 is a cross-sectional explanatory view corresponding to FIG. 2, showing another different example of an undercover having a structure according to the present invention. FIG. 5 is an enlarged partial cross-sectional explanatory view corresponding to FIG. 3, showing still another example of an undercover having a structure according to the present invention. FIG. 6 is an enlarged partial cross-sectional explanatory view corresponding to FIG. 3, showing still another example of an undercover having a structure according to the present invention. (A) And (b) is an expanded sectional fragmentary explanatory view corresponding to FIG. 3 which shows another example of the undercover which has a structure according to this invention, respectively. FIG. 8 is an enlarged partial cross-sectional explanatory view corresponding to FIG. 7, showing another example of an air duct having a structure according to the present invention. It is a plane explanatory view corresponding to FIG. 1 which shows another different example of the undercover which has a structure according to this invention. It is a plane explanatory view corresponding to FIG. 1 which shows another different example of the undercover which has a structure according to this invention.

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

  First, FIG. 1 to FIG. 3 show an under cover 10 as an example of a wind guide part for an automobile having a structure according to the present invention in a plan view and a cross-sectional view. In this case, the under cover 10 is formed using an integral resin molded product having a substrate portion 12 made of a plate-like member, for example, a polypropylene resin, or a polypropylene resin mixed with a glass filler in order to improve rigidity and heat resistance. The resin molded product is integrally formed by injection molding. In addition, such an undercover 10 will be arrange | positioned in the form so that the board | substrate part 12 may each expand in the vehicle front-back direction and the width direction in the lower part of a vehicle front part. In the following, the direction corresponding to the vertical direction in FIG. 1 is referred to as the vehicle width direction, the direction corresponding to the horizontal direction in FIG. 1 is referred to as the vehicle front-rear direction, and the direction perpendicular to the plane of FIG. The direction corresponding to the vertical direction in FIG. 3 is referred to as the vehicle vertical direction.

  More specifically, as is clear from FIG. 1, the substrate portion 12 extends in the vehicle front-rear direction and has a substantially T-shape in which the front portion is wide and the rear portion is narrow. Each of the front end portion and the rear end portion has a plurality of (here, six) front side mounting holes 14 and a plurality (four here) of rear side mounting holes 16, respectively. It is formed at predetermined intervals in the direction. As is clear from FIG. 2, the front surface (upper surface 18) and the rear surface (lower surface 20) of the substrate portion 12 are substantially flat surfaces, and the first air guide surface is formed on the upper surface 18 and the lower surface 20. And the 2nd wind guide surface is comprised. It should be noted that the front end portion of the substrate portion 12 is smoothly protruded upward due to the layout of the under cover 10 attached to the vehicle.

  Here, in the under cover 10, as shown in FIGS. 1 and 2, a substantial extension extending in the vehicle width direction with respect to a portion of the upper surface 18 of the base plate portion 12 on the front side of the plurality of rear mounting holes 16. A plurality (10 in this case) of plate-like ribs 22 having a flat plate shape are integrally formed so as to protrude upward from the substrate portion 12. The protruding heights of these plate-like ribs 22 are sequentially increased toward the rear side, and are arranged at a constant interval P in the vehicle front-rear direction.

  That is, as is apparent from FIG. 2, the rib slope portion 24 that is inclined upward toward the rear side with respect to the upper surface 18 of the substrate portion 12 is integrally formed by the plurality of plate-like ribs 22. It becomes. Here, since the protruding heights of the plurality of plate-like ribs 22 are sequentially increased by a certain amount toward the rear side, the rib slope portion 24 as a whole has a constant inclination angle: θ. (In FIG. 2, the angle formed by the straight line connecting the front end portion of the plate-like rib 22 located at the forefront and the front end portion of the plate-like rib 22 located at the rearmost side with respect to the upper surface 18 of the substrate portion 12). Inclined so that the height gradually increases toward the rear side.

  Further, as shown in detail in FIG. 3, the front end surface 26 of each plate-like rib 22 is an inclined surface that is inclined so that the height gradually increases toward the rear side. The inclination angle θs of each tip surface 26 is equal to the inclination angle θ of the entire rib slope portion 24. Note that, in the plate-like rib 22 positioned at the forefront, the front end edge portion of the front end face 26 is made to coincide with the substrate portion 12.

  Furthermore, in the two plate-like ribs 22 and 22 adjacent to each other in the vehicle front-rear direction of the rib slope portion 24, the front edge of the front end surface 26 of the plate-like rib 22 on the rear side is plate-like on the front side. It is positioned on a virtual plane S on which the tip surface 26 of the rib 22 is located. Here, in the present embodiment, as described above, the protruding height of the plate-like rib 22 and the inclination angle of the tip end face 26: θs, the distance between the two adjacent plate-like ribs 22 and 22. : P and the inclination angle of the entire rib slope portion 24: θ, etc. are set, so that the virtual plane S in which the tip surfaces 26 of all the plate-like ribs 22 are located: S, in other words, The front end surfaces 26 of all the plate-like ribs 22 are positioned on one virtual plane: S.

  And the under cover 10 of this embodiment which has such a structure is arrange | positioned at the lower part of a vehicle front part, for example, as FIG. 4 shows.

  In FIG. 4, the under cover 10 is attached to a front bumper 28 disposed so as to extend in the vehicle width direction in front of the vehicle at a plurality of front attachment holes 14 formed at the front end portion thereof, while the rear end thereof A plurality of rear mounting holes 16 formed in the part are attached to a suspension member 30 constituting a part of a vehicle body (frame) disposed in the lower part of the engine room: E so as to extend in the vehicle width direction. Yes. Thus, the under cover 10 is disposed at the lower portion of the front portion of the vehicle (engine room: E) in such a form that the base plate portion 12 extends in the front-rear direction and the width direction of the vehicle. Further, behind the engine room E, a floor panel 34 constituting the lower part (floor part) of the vehicle compartment 32 and a dash panel 36 that is a wall member separating the vehicle compartment 32 and the engine room E are arranged. Yes. A substantially semi-cylindrical tunnel portion 38 that opens toward the front of the vehicle (engine room: E) is formed in the lower portion of the center portion in the vehicle width direction of the floor panel 34, and is disposed below the tunnel portion 38. A space that communicates with the engine room E and opens to the rear of the vehicle is formed between the substantially flat tunnel-shaped lower cover 40.

  4 shows the upper grille 42, the lower grille 44, the radiator support 46, the radiator 48, the shroud 50, the bonnet 52, the engine 54, and the windshield 56, which are shown when the vehicle is running. It is shown in order to explain the state of the generated air flow, and since it has the same configuration as the conventional one, detailed description thereof will be omitted.

  Then, as described above, the overall flow of the air flow generated when the automobile is traveling in the front portion of the vehicle in which the under cover 10 is disposed will be briefly described with reference to FIG. It becomes like this. In addition, with respect to such an undercover 10, air currents (traveling air: Fd, cooling air: Fe, and underbody traveling air: Fu) generated when the automobile travels flow from the front to the rear of the vehicle. It becomes. That is, here, the vehicle front-rear direction corresponds to the airflow direction, the vehicle front side corresponds to the airflow upstream side, and the vehicle rear side corresponds to the airflow downstream side.

  First, from the upper grille 42 and the lower grille 44, a part of the running wind Fd generated during the running of the automobile is taken into the engine room E. The air flow (cooling air) in the engine room E that is taken in (cooling air): Fe cools equipment and facilities mounted in the engine room E, such as the radiator 48 and the engine 54. Then, the cooling air: Fe that has moved to the vehicle rear side flows downward toward the vehicle rearward along the dash panel 36, and is mainly a space between the tunnel lower cover 40 and the tunnel portion 38. From the vehicle to the rear side of the vehicle.

  Here, a part of such cooling air: Fe is in the lower part of the engine room: E so as to be along the upper surface 18 (first air guide surface) of the substrate portion 12 of the under cover 10 and on the vehicle rear side. Will be led to. Then, at the rear part of the engine room: E, it is combined with the cooling air: Fe, which has been inclined downward, and discharged to the vehicle rear side. In the lower part of the vehicle body, an airflow (traveling wind under the vehicle body) flowing from the front of the vehicle toward the rear of the substrate unit 12: Fu is along the lower surface 20 (second air guide surface) of the substrate unit 12. Thus, it is guided to the vehicle rear side.

  By the way, in this embodiment, since the rib slope part 24 which consists of several plate-shaped rib 22 is formed in the back side site | part of the undercover 10, the cooling air: Fe of the upper surface 18 side of the board | substrate part 12: There is a big feature in the flow.

  That is, as shown in FIG. 5, a part of the cooling air: Fe guided to the rear side along the upper surface 18 of the substrate portion 12 is smoothly inclined upward along the rib slope portion 24. Will be guided as follows. This avoids a collision between a part of such cooling air: Fe and the suspension member 30 disposed so as to protrude upward from the upper surface 18 at the rear end portion of the substrate portion 12. That is, a part of the cooling air: Fe is rectified so as to smoothly get over the suspension member 30. Then, a part of the cooling air: Fe rectified in this way flows in the rear part of the engine room: E so as to incline downward along the dash panel 36 from the upper part of the engine room: E: It becomes possible to smoothly merge with Fe.

  Further, here, since the lower surface 20 (second air guide surface) of the substrate portion 12 is a flat surface without unevenness, the underbody travel wind: Fu is along the lower surface 20 of the substrate portion 12. It is smoothly guided to the vehicle rear side.

  As is clear from the above description, in the under cover 10 having the structure as in the present embodiment, the protruding height with respect to the upper surface 18 of the substrate portion 12 is on the downstream side of the airflow generated when the automobile is running. A plurality of plate-like ribs 22 that become higher in the direction of the air flow are arranged at intervals in the flow direction of the air flow, so that the rib slope portion 24 that is integrally formed has a lower portion in the engine room E. Since a part of the air flowing through the vehicle (cooling air: Fe) is smoothly guided to the vehicle rear side so as to avoid a collision with the suspension member 30, one of such cooling air: Fe It is possible to suppress or prevent turbulence (abrupt changes in flow), and it is possible to advantageously suppress an increase in air resistance.

  Further, here, the front end surface 26 of each plate-like rib 22 is an inclined surface inclined at an inclination angle: θs so that the height gradually increases toward the downstream side of the cooling air: Fe. From this point, a part of the cooling air: Fe guided to the rear side of the vehicle along the substrate portion 12 and the rib slope portion 24 is inclined more smoothly toward the rear of the vehicle so as to be along the respective front end surfaces 26. Thus, a part of the cooling air: Fe can be smoothly guided while effectively suppressing an increase in air resistance.

  Furthermore, in the two plate-like ribs 22 and 22 adjacent to each other in the flow direction of the cooling air: Fe of the rib slope portion 24, the upstream side (front side) of the front end surface 26 of the plate-like rib 22 on the downstream side (rear side). ) Is located on the virtual plane S on which the front end surface 26 of the upstream plate-like rib 22 is located, along the front end surface 26 of the upstream plate-like rib 22, Cooling air guided in a state of being tilted upward toward the vehicle rear side: It is advantageously prevented that a part of Fe collides with the front surface of the plate-like rib 22 on the downstream side and is disturbed. Therefore, it is possible to smoothly guide a part of the cooling air: Fe while further effectively suppressing an increase in air resistance.

  Here, the front end edge portion of the front end surface 26 of the plate-like rib 22 positioned on the foremost side is made to coincide with the upper surface 18 of the substrate portion 12. That is, in the plate-like rib 22, no front surface orthogonal to the cooling air: Fe is formed. Therefore, at the front end portion of the rib slope portion 24, a part of the cooling air: Fe guided to the vehicle rear side along the substrate portion 12 is smoothly transferred to the rear of the vehicle by the front end surface 26 of the plate-like rib 22. It will be guided so as to be tilted upward toward the side.

  Further, in this way, a part of the cooling air: Fe flowing in the lower part of the engine room: E is prevented from being suddenly raised (inclined) by colliding with the suspension member 30. Therefore, a part of the cooling air: Fe guided along the rib slope portion 24 and the cooling air: Fe that has flowed downward along the dash panel 36 from the upper part of the engine room E are mutually connected. It can be smoothly merged without being disturbed by interference. Thereby, in the rear part of the engine room: E, an increase in air resistance due to the disturbance of the cooling air: Fe can be advantageously suppressed.

  Further, since the increase in air resistance at the rear part of the engine room E can be suppressed in this way, the cooling air Fe can be efficiently discharged from the engine room E. Therefore, there is also an advantage that the cooling efficiency of the radiator 48, the engine 54, etc. can be advantageously improved.

  In the undercover 10, the rib slope portion 24 is constituted by a plurality of plate-like ribs 22, and thus a concave portion is formed on the surface (lower surface 20) on the opposite side of the substrate portion 12 in the formation portion of the rib slope portion 24. Is formed, and the lower surface 20 is a substantially flat surface with no irregularities. Therefore, the airflow generated when the vehicle travels can be smoothly guided to the rear side of the vehicle on both the upper surface 18 and the lower surface 20 of the substrate portion 12, thereby advantageously improving the aerodynamic performance. Features that can be demonstrated.

  In addition, since the under cover 10 is composed of an integral resin molded product in which the rib slope portion 24 is integrally formed as described above, the manufacturing cost is low and the size of the component itself is increased. Is suppressed. In addition, since it has a configuration in which an extremely thick portion does not exist, there is an advantage that moldability (coolability, dimensional stability, etc.) in injection molding is particularly good.

  By the way, when the flow in the engine room (E) (cooling air: Fe) having a relatively slow flow velocity is guided by the rib slope portion 24 having the above-described structure, the distance between the two adjacent plate-shaped ribs 22 and 22. : P is preferably in the range of about 5 to 20 mm. That is, when the interval P is smaller than 5 mm, there is a manufacturing problem that the undercover 10 is difficult to be integrally formed. When the interval P is larger than 20 mm, it is difficult to smoothly guide the airflow. As a result, the aerodynamic performance may be deteriorated.

  Further, the inclination angle θ of the entire rib slope portion 24 is preferably 45 ° or less. In general, when the inclination angle: θ exceeds 45 °, the airflow guided along the rib slope portion 24 is abrupt as if it collides with an obstacle (partner) such as the suspension member 30. This is because a change (disturbance) in the flow occurs, and the aerodynamic performance may be deteriorated.

  Further, the inclination angle θs of the front end face 26 of each plate-like rib 22 is preferably 45 ° or less. If this inclination angle: θs exceeds 45 °, the air current collides with the leading end surface 26, resulting in turbulence, which may deteriorate the aerodynamic performance. The inclination angle: θs is more preferably equal to the inclination angle of the rib slope portion 24: θ. Thereby, in the rib slope part 24, the air guide surface with few unevenness | corrugations which has the fixed inclination angle: (theta) as a whole will be formed, and an airflow can be guide | induced more smoothly.

  Next, FIG. 6 and FIG. 7 schematically show the structure of the front part of the vehicle in which a wind guide duct 58 having another example of a wind guide part for an automobile according to the present invention is arranged in a cross-sectional form. It is shown. In the configuration shown in FIGS. 6 and 7, parts and members having the same structure as that described above with respect to the bumper cover 10 are denoted by the same reference numerals as those in FIGS. The detailed explanation is omitted.

  Specifically, as shown in FIG. 6, the air guide duct 58 has a substantially rectangular tube shape as a whole, and in the engine room E, a front bumper 28 installed on the front surface of the vehicle. Between the radiator 48 as a cooling system component installed on the rear side of the vehicle with respect to the front bumper 28, it is arranged so as to extend in the front-rear direction of the vehicle, and is opened at the front and the rear of the vehicle, respectively. Thereby, in the front part of the vehicle, a part of the traveling wind: Fd (cooling wind: Fe) taken into the engine room: E from the upper grille 42 and the lower grille 44 is introduced into the wind guide duct 58, It is sent out toward the front surface of the radiator 48.

  The air guide duct 58 having such a function is opposed to each other in the vehicle width direction and extends in the vertical direction and the front-rear direction of the vehicle. The right side wall portion 60 and the left side as a wind guide plate member (automobile wind guide component). It has a wall part (not shown) and an upper side wall part 62 and a lower side wall part 64 as air guide plate members that face each other in the vehicle vertical direction and extend in the vehicle width direction and the vehicle front-rear direction. These right side, upper side and lower side wall portions 60, 62, 64 and left side wall portion are all made of synthetic resin plates, and they are integrally connected to form the air guide duct 58. Has been. Here, in this wind guide duct 58, the upper side wall part 62 has the structure as another example of the wind guide component for motor vehicles according to this invention.

  That is, as shown in FIG. 7, the upper side wall portion 62 has the substrate portion 12 made of a plate-like member extending in the vehicle front-rear direction, and the inner surface 66 (lower surface in FIG. 7) of the substrate portion 12 is the first. On the other hand, the outer surface 68 (the upper surface in FIG. 7) is the second air guide surface. In this way, on the inner surface 66 of the substrate portion 12, a part of the cooling air: Fe introduced from the front surface of the vehicle is guided toward the radiator 48, while the outer surface 68 (second air guiding surface) from the upper grill 42. Cooled air taken in: Fe is partly guided to the vehicle rear side.

  Here, a plurality (three in this case) of the plate-like ribs 22 protrude from the substrate portion 12 with respect to the inner surface 66 of the substrate portion 12, and the protruding height thereof faces the downstream side of the cooling air: Fe. The cooling air is arranged so as to be spaced apart from each other in the flow direction of the cooling air: Fe. Thereby, the rib slope part 24 which inclines downward toward the vehicle rear side with respect to the inner surface 66 of the board | substrate part 12 is integrally formed. Note that the outer surface 68 of the substrate portion 12 is a substantially flat surface having no unevenness.

  Accordingly, in the upper wall portion 62 of the air guide duct 58, on the inner surface 66 side, a part of the cooling air: Fe is inclined downward toward the vehicle rear side along the rib slope portion 24. Then, it is guided toward the front central portion of the radiator 48. Further, on the outer surface 68 side of the upper side wall portion 62, a part of the cooling air: Fe is smoothly guided to the vehicle rear side.

  In this way, in the air guide duct 58 according to the present embodiment, a part of the cooling air: Fe introduced into the air guide duct 58 is directed to a predetermined part of the radiator 48 by the rib slope portion 24. Therefore, the cooling efficiency of the radiator 48 can be effectively improved. Further, a part of the cooling air: Fe flowing outside the air guide duct 58 is smoothly guided to the rear side of the vehicle, so that the equipment such as the engine 54 located behind the radiator 48 is directly and advantageously cooled. Therefore, there is an advantage that cooling in the engine room E can be effectively performed.

  The exemplary embodiments of the present invention have been described in detail above. However, the embodiments are merely examples, and the present invention is limited in any way by specific descriptions according to such embodiments. It should be understood that it is not interpreted.

  For example, the formation form of the rib slope portion 24 is not limited to that of the above-described embodiment, and instead, it is possible to adopt a form as shown in FIGS. 8 to 11.

  That is, in the form shown in FIG. 8, the rib slope portion 24 is integrally formed by projecting and forming four plate-like ribs 22 on the lower surface 20 of the undercover 10. . Thus, when there is an opponent (suspension member 30 or the like) that protrudes downward from the lower surface 20, it is possible to guide the underbody travel wind: Fu so as to avoid a collision with the opponent. Therefore, it is possible to improve the aerodynamic performance by suppressing the turbulence of the airflow below the substrate portion 12.

  In this way, in the case where the rib slope portion 24 guides the airflow flowing under the substrate portion 12 from the front of the vehicle toward the rear (vehicle underbody traveling wind: Fu), the underbody traveling wind: Fu has a flow velocity of Engine room: Since it is relatively fast with respect to the flow rate of the air flow (cooling air: Fe) in E, the interval between two adjacent plate-like ribs 22 and 22: P ′ Even when the interval is larger than P, the airflow can be advantageously led.

  In the form shown in FIG. 9, a slope portion 70 is formed on the upper surface 18 side by being deformed so that a part of the substrate portion 12 protrudes upward, and the back surface (lower surface 20). Seven plate-like ribs 22 are formed in a recess 72 inevitably formed so as to open downward on the side. That is, here, the rib slope portion 24 is formed so as to fill the concave portion 72, and therefore, it is advantageously prevented that the airflow (traveling wind under the vehicle body: Fu) enters the concave portion 72 and is disturbed. It has come to be.

  Further, in the embodiment shown in FIG. 10, the rib slope portion 24 is formed in the front portion of the upper surface 18 of the substrate portion 12 so that a part of the cooling air: Fe is guided toward the engine 54. It has become. In this manner, the rib slope portion 24 can also guide the airflow in an arbitrary direction, for example, toward a device to be cooled. Here, in order to advantageously obtain a desired wind guide effect by the rib slope portion 24, the protruding height of the plurality of plate-like ribs 22 is gradually increased in a quadratic function sequentially toward the rear of the vehicle. It has become.

  Furthermore, as shown in FIG. 11, rib slope portions 24 can be integrally formed on both the upper surface 18 and the lower surface 20 of the substrate portion 12. Thereby, on both the upper surface 18 side and the lower surface 20 side of the substrate part 12, the airflow (here, cooling air: Fe and underbody traveling wind: Fu) is avoided from colliding with the projecting counterparts 31, 31. It will be possible to guide. In the undercover 10 having such a configuration, as described above, the cooling air having a relatively slow flow rate: between the two plate-like ribs 22, 22 adjacent to each other in the rib slope 24 on the upper surface 18 side for guiding Fe. The distance between the two plate-like ribs 22, 22 on the rib slope 24 on the lower surface 20 side that guides Fu is set to a desired distance: P ′. It is preferable to make it large as long as the rectifying effect is obtained. Thereby, the number of the plate-like ribs 22 in the rib slope 24 on the lower surface 20 side can be reduced, and thus, advantages such as reduction in the weight of the entire undercover 10 and reduction in manufacturing cost can be obtained.

  In short, in any of these exemplified forms, the automotive wind guide component (under cover 10) can be formed of an integral resin molded product, and both the front surface and the back surface of the substrate portion 12 The airflow (cooling wind: Fe and underbody travel wind: Fu) generated in the traveling embodiment can be guided to the rear side of the vehicle without causing a sudden change (disturbance) in the airflow. The advantageous effects according to the present invention can be enjoyed.

  In addition, as a wind guide component for motor vehicles which has the structure according to this invention, it is not restricted to the illustrated undercover 10 or the wind guide duct 58 at all. That is, it can be appropriately employed as a wind guide component for an automobile that includes a board portion made of a plate-like member and has a function of guiding an airflow generated when the automobile travels to the vehicle rear side on both the front surface and the back surface. Accordingly, as the counterpart to be prevented from colliding with the airflow and the equipment to be cooled by the airflow, in addition to the suspension member 30 and the engine 54, various motors, fuel tanks, batteries (batteries for hybrid vehicles), etc. Examples include members and equipment.

  Further, for example, the form of formation of the plate-like ribs 22 constituting the rib slope portion 24 is not limited to that of the above-described embodiment, and instead, the form as shown in FIGS. 12 to 14 is used. It is also possible. Here, for convenience of explanation, the numbers 1 to 3 are appended to the end of the reference numerals in order from the front side (upstream side of the airflow) of the plurality of plate-like ribs 22 shown in each drawing.

  That is, in the form shown in FIG. 12, in the two plate-like ribs 22 and 22 adjacent to each other in the airflow direction, the upstream edge of the airflow at the front end surface 26 of the plate-like rib 22 on the downstream side. The portion is positioned on the substrate portion 12 side (the lower side in FIG. 12) by distances d1 and d2 relative to the virtual plane S1 and S2 where the distal end surface 26 of the plate-like rib 22 on the upstream side is located. Thereby, it is possible to more advantageously avoid the collision of the airflow with the front surface of each plate-like rib 22.

  Further, the inclination angle θs of the front end surface 26 of each plate-like rib 22 may not be constant. In the form shown in FIG. 13, the inclination angles: θs1, θs2, and θs3 of the front end surfaces 26, 26, and 26 of the plate-like ribs 22, 22, and 22 are sequentially increased toward the rear side. Also in this case, in the two adjacent plate-like ribs 22, 22, the front end edge portion of the tip surface 26 of the plate-like rib 22 on the rear side is a virtual plane on which the tip surface of the plate-like rib 22 on the front side is located: It is positioned closer to the substrate part 12 than S1 and S2. On the other hand, since the inclination angles θs1, θs2, and θs3 are gradually increased, the rear end edge of the front end surface 26 of the plate rib 22 on the rear side is here the front end surface of the plate rib 22 on the front side. The virtual plane in which is located: is positioned above S1 and S2.

  In each plate-like rib 22, it is not essential that the tip surface 26 is an inclined surface. In the plate-like rib 22 positioned at the forefront, the front end edge of the tip surface 26 is a substrate. The form matched with the part 12 is not limited to this. That is, as shown in FIGS. 14A and 14B, the front end surface 26 of each plate-like rib 22 is made to be a plane substantially parallel to the upper surface 18 of the substrate part 12, or located at the forefront. It is also possible to position the front end edge of the front end surface 26 of the plate-like rib 22 so as to protrude from the substrate portion 12.

  Further, in the illustrated embodiment, the front end surface 26 of each plate-like rib 22 is a flat inclined surface toward the rear of the vehicle, but the front end surface 26 may be curved in the vehicle front-rear direction. Furthermore, the front end surface 26 of each plate-like rib 22 may have any desired inclination or curved shape with respect to the vehicle width direction. In addition, the intervals P, P ′ between the two adjacent plate-shaped ribs 22, 22 may not be constant in the entire rib slope portion 24.

  Note that the plate-like ribs 22 may be formed so as to protrude with respect to the substrate portion 12. For example, as shown in FIG. 15, in the air guide duct 58, the plurality of plate-like ribs 22 can be inclined at an angle α with respect to a direction perpendicular to the substrate portion 12. Thereby, although it is necessary to eliminate the undercut portion in the injection molding and to partially use the slide mechanism, the right side, upper side, and lower side wall portions 60, 62, and 64 and the left side wall portion are integrated. It becomes possible to manufacture as an integral resin molded product connected to.

  It is also possible to gradually increase the width of the plurality of plate-like ribs 22 in the vehicle width direction, that is, the dimension in the direction perpendicular to the airflow direction, sequentially toward the downstream side of the airflow. Accordingly, as shown in FIGS. 16 and 17, the airflow can be guided also in the vehicle width direction by the rib slope portion 24.

  Furthermore, a plurality of flat reinforcing ribs extending in the flow direction can be provided so as to straddle the plurality of plate-like ribs 22. Thereby, the intensity | strength of the rib slope part 24 thru | or the whole undercover 10 (automobile wind guide component) can be improved advantageously.

  In addition, although not listed one by one, the present invention can be carried out in an embodiment to which various changes, modifications, improvements and the like are added based on the knowledge of those skilled in the art. It goes without saying that any one of them falls within the scope of the present invention without departing from the spirit of the present invention.

10 Undercover 12 Substrate 18 Upper surface (first air guide surface) 20 Lower surface (second air guide surface)
22 Plate-shaped rib 24 Rib slope portion 26 Tip surface 30 Suspension member 42 Upper grille 44 Lower grille 48 Radiator 54 Engine 58 Air duct 62 Upper wall portion 66 Inner surface (first air guide surface) 68 Outer surface (second air guide surface)
70 Slope part 72 Concave part Fd Running wind Fe Cooling wind Fu Running wind under vehicle body

Claims (5)

It consists of a plate-like member extending in the vehicle front-rear direction, and has front and back surfaces each having a base plate portion that serves as a first air guide surface and a second air guide surface that guides an airflow generated during traveling of the automobile to the vehicle rear side. Automotive wind guide parts,
A plate that protrudes from the substrate portion with respect to either one or both of the first air guide surface and the second air guide surface of the substrate portion, and the protruding height thereof is gradually increased toward the downstream side of the air flow. An integrated resin molding in which a plurality of ribs are arranged at intervals in the airflow direction so that a rib slope portion for guiding a part of the airflow generated when the automobile is running is integrally formed. A wind guide component for automobiles, characterized by being made up of products.   The wind guide component for an automobile according to claim 1, wherein the front end surfaces of the plurality of plate-like ribs are inclined surfaces that are inclined so that the height gradually increases toward the downstream side of the airflow.   In the two plate-like ribs adjacent to each other in the airflow direction of the rib slope portion, the upstream edge portion of the airflow at the front end surface of the plate-like rib on the downstream side of the airflow is upstream of the airflow. The automotive wind guide component according to claim 2, wherein the wind guide component is positioned on a virtual plane on which a front end surface of the plate-like rib is positioned or on the board portion side of the virtual plane. An under cover comprising the wind guide component for an automobile according to claim 1,
In the form in which the base plate portion extends in the vehicle front-rear direction and the width direction respectively, it is disposed at the lower portion of the front portion of the vehicle, and the first wind guide surface is configured to remove air in the engine room taken from the front of the vehicle. The underflow is configured to guide the flow toward the rear side of the vehicle, while the second air guide surface is configured to guide an airflow flowing downward from the front side of the vehicle toward the rear side of the substrate portion toward the rear side of the vehicle. cover. An air duct having the vehicle air guiding component according to claim 1,
Between the front bumper installed on the front surface of the vehicle and the cooling system parts installed on the vehicle rear side of the front bumper, the first wind guide surface is arranged to extend in the vehicle front-rear direction, A wind guide configured to guide the traveling wind taken from the front of the vehicle to the cooling system component, and to guide a part of the traveling wind to the rear side of the vehicle on the second wind guide surface. duct.

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