JP2015016835A - Floor under cover structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a floor undercover which can improve a vehicle aerodynamic characteristic and operation easiness.SOLUTION: A flat plate shaped undercover covering a lower face of a vehicle rear, and a first inclination part 28 which is arranged at a front end 48 of the undercover, and inclined to a vehicle front side with respect to vehicle vertical direction when viewed from a side cross section are formed at a floor undercover 18. Furthermore there are formed a second inclination part 32 which extends to a vehicle front side from a front end of the first inclination part, and is set smaller than the first inclination part in an inclination angle to the vehicle front side with respect to the vehicle vertical direction, and an opening 24 which is opened to a vehicle lower side and the vehicle front at vehicle front sides of the first inclination part and the second inclination part. Accordingly, a traveling wind W which collides with the second inclination part flows to a vehicle rear part along the second inclination part, however, since the wind is exfoliated at a boundary portion with the first inclination part, and negative pressure is generated between the traveling wind and the floor undercover, the road following performance of a tire can be improved.

Description

  The present invention relates to a floor undercover structure.

  Patent Document 1 below discloses a structure in which a floor under cover is set on the lower surface of a vehicle. Specifically, a connecting member that connects the left and right rear wheel suspension members is arranged to extend in the vehicle width direction. A front rear under cover extending in the front-rear direction and a rear rear under cover are provided. The front rear under cover is disposed such that the rear end of the bottom surface thereof is at a height position substantially equal to that of the connecting member, and the rear rear under cover has a front end of the bottom surface substantially equal to the height of the connecting member. It is considered as a position. As a result, in a vehicle in which the connecting member that connects the left and right rear wheel suspension members extends in the vehicle width direction, it is possible to further improve the aerodynamic characteristics of the vehicle without the traveling wind colliding with the connecting member. Become.

JP 2012-66764 A

  However, according to the above prior art, the front end portion of the rear rear under cover has a vertical wall portion extending upward in the vehicle in a direction substantially perpendicular to the direction of the traveling wind. A turbulent flow is generated when the traveling wind collides with the wall portion, and the wind flow is deteriorated. As a result, the vehicle aerodynamic characteristics cannot be further improved.

  In view of the above problems, an object of the present invention is to provide a floor under cover structure that can improve vehicle aerodynamic characteristics and also improve steering stability (hereinafter simply referred to as “steerability”). .

  The floor under cover structure according to the first aspect of the present invention is disposed below the floor of the rear part of the vehicle, and is provided at the front end part of the flat cover that covers the lower surface of the rear part of the vehicle and the under cover. A first inclined portion that is inclined to the front side of the vehicle with respect to the vehicle vertical direction, and a vehicle that extends from the front end portion of the first inclined portion to the front side of the vehicle, with respect to the vehicle vertical direction from the first inclined portion. A second inclined portion having a small inclination angle toward the front side, an opening formed on the vehicle front side of the first inclined portion and the second inclined portion, and opened to the vehicle lower side and the vehicle front side; have.

  A floor under cover structure according to a second aspect of the present invention is the floor under cover structure according to the first aspect, wherein the floor under cover structure extends from the front end of the second inclined portion to the vehicle upper side and is more than the second inclined portion. A vertical wall portion having a small inclination angle toward the vehicle front side with respect to the vehicle vertical direction is set.

  A floor under cover structure according to a third aspect of the present invention is the floor under cover structure according to the first or second aspect, wherein the inclination angle of the second inclined portion is 40 ° to 55 ° with respect to the horizontal plane. ing.

  The floor under cover structure according to a fourth aspect of the present invention is the floor under cover structure according to any one of the first to third aspects, wherein an inclination angle of the first inclined portion is 20 ° to 30 ° with respect to a horizontal plane. ing.

  A floor under cover structure according to a fifth aspect of the present invention is the floor under cover structure according to any one of the first to fourth aspects, wherein the floor under cover structure is provided below the first inclined portion in the vehicle vertical direction and on the front side of the opening. And a front under cover for covering the lower surface of the vehicle.

  According to the first aspect of the present invention, the floor under cover provided below the floor of the rear portion of the vehicle is provided with a flat plate-like under cover that covers the lower surface of the rear portion of the vehicle, and a front end portion of the under cover. A first inclined portion that is inclined to the vehicle front side with respect to the vehicle vertical direction is formed. Also, a second inclined portion that extends from the front end portion of the first inclined portion to the vehicle front side and has a smaller inclination angle toward the vehicle front side with respect to the vehicle vertical direction than the first inclined portion, and the first inclined portion And the opening part opened to the vehicle downward side and vehicle front side is formed in the vehicle front side of the 2nd inclination part. Therefore, when the traveling wind flowing in the opening collides with the second inclined portion, it flows toward the rear of the vehicle along the second inclined portion, but peels off at the boundary with the first inclined portion. That is, a negative pressure is generated between the traveling wind and the floor undercover, so that a force for pressing the vehicle downward is generated, and the road surface following property of the tire can be improved.

  Further, the inclination angle of the first inclined portion toward the vehicle front side with respect to the vehicle vertical direction is set larger than that of the second inclined portion. Accordingly, the traveling wind that has collided with the first inclined portion flows toward the rear of the vehicle along the first inclined portion, but flows smoothly without being peeled off from the first inclined portion to the under cover.

  According to the second aspect of the present invention, the vehicle is extended from the front end portion of the second inclined portion to the vehicle upper side, and the inclination angle to the vehicle front side with respect to the vehicle vertical direction is set smaller than the second inclined portion. A vertical wall is provided. Therefore, even when traveling on a submerged channel or the like, water or the like can be prevented from entering between the floor undercover and the vehicle.

  According to this invention of Claim 3, the inclination-angle of a 2nd inclination part shall be 40 degrees-55 degrees with respect to a horizontal surface. Therefore, when the traveling wind flowing from the front of the vehicle along the substantially horizontal direction collides with the second inclined portion, the direction of the wind flow greatly changes along the second inclined portion. As a result, it is possible to more effectively generate a force that further promotes the separation of the traveling wind at the boundary between the first inclined portion and the second inclined portion and presses the vehicle downward.

  According to this invention of Claim 4, the inclination-angle of a 1st inclination part shall be 20 degrees-30 degrees with respect to a horizontal surface. Accordingly, when the traveling wind flowing from the front of the vehicle in the substantially horizontal direction collides with the first inclined portion, the direction of the wind flow changes along the first inclined portion, but the change in the direction is small. Accordingly, it is possible to smoothly flow the traveling wind from the first inclined portion to the under cover while being adhered without being peeled off from the surface of the floor under cover.

  According to the fifth aspect of the present invention, the front under cover is provided below the first inclined portion in the vehicle vertical direction and on the front side of the opening, and covers the lower surface of the vehicle. Therefore, when the vehicle is traveling straight, the traveling wind flows under the front under cover, jumps over the spaced opening, and flows to the first inclined portion of the floor under cover. For this reason, it becomes possible to flow a driving | running | working wind smoothly from a 1st inclination part to an undercover.

  In addition, when the traveling wind does not flow along the front under cover, such as when a side wind blows to the automobile and when turning, the traveling wind that has collided with the second inclined portion does not flow along the front under cover, It flows to the vehicle lower side along the second inclined portion, and peels off at the boundary with the first inclined portion. Therefore, a negative pressure is generated between the traveling wind and the floor under cover, and a force for pressing the vehicle downward is generated. Thereby, the road surface followability of a tire can be improved.

  The floor under cover according to the first aspect of the present invention has an excellent effect that the aerodynamic characteristics of the vehicle can be improved and the operability can be improved.

  The floor under cover structure according to the second aspect of the present invention has an excellent effect of preventing water and the like from entering the floor under cover and preventing the floor under cover from falling off.

  The floor under cover according to the third aspect of the present invention has an excellent effect that the operability can be further improved.

  The floor under cover according to the fourth aspect of the present invention has an excellent effect that the vehicle aerodynamic characteristics can be further improved.

  The automobile according to the fifth aspect of the present invention has an excellent effect that the vehicle aerodynamic characteristics can be improved when traveling straight and the operability can be improved during turning.

It is the perspective view which looked at the automobile which has the floor undercover concerning one embodiment from the back side. It is sectional drawing which shows a part of motor vehicle which has the floor undercover concerning one Embodiment. It is sectional drawing which shows a part of motor vehicle which has the floor under cover which concerns on the proportionality 1. It is sectional drawing which shows a part of motor vehicle which has the floor under cover which concerns on the contrast 2. It is sectional drawing which shows a part of motor vehicle which has the floor undercover concerning a 1st reference example. It is sectional drawing which shows a part of motor vehicle which has the floor undercover concerning a 2nd reference example.

  Hereinafter, an embodiment of a floor undercover according to the present invention will be described with reference to FIGS.

  FIG. 1 shows a perspective view of an automobile 10 as a vehicle as viewed from the back side. A rear wheel suspension member (suspension arm such as a trailing arm) 14 is provided on the inner side of the left and right rear wheels 12 of the automobile 10. The left and right rear wheel suspension members 14 are connected in the vehicle width direction by an elongated connecting member 16 arranged as a longitudinal direction in the vehicle width direction. The connecting member 16 is formed in an open cross-sectional shape in which the vehicle lower side is an open side, and constitutes a torsion beam (intermediate beam).

  A floor under cover 18 is attached to the rear surface of the automobile 10 and the vehicle rear side from the connecting member 16. Similarly, a front under cover 20 is attached to the vehicle front side from the connecting member 16. The floor under cover 18 and the front under cover 20 are formed of a resin material as an example, and are attached so as to cover a fuel tank, a spare tire pan, and the like provided on the lower surface 22 of the automobile 10.

  As shown in FIG. 2, the floor under cover 18 includes an under cover 26 that covers the lower surface of the vehicle that is formed in a substantially planar shape, and a front end portion 48 of the under cover 26 with respect to the vehicle vertical direction in a side sectional view. A first inclined portion 28 that is inclined toward the vehicle front side is provided. Further, the front end portion 30 of the first inclined portion 28 is provided with a second inclined portion 32 that extends upward and inclines toward the front of the vehicle. The inclination angle of the second inclined portion 32 with respect to the horizontal plane is the first angle. It is set larger than the inclination angle of the inclined portion 28 with respect to the horizontal plane. Specifically, the angle of the second inclined portion 32 is set within a range of 40 ° to 55 ° with respect to the horizontal plane, and the angle of the first inclined portion 28 is set within a range of 20 ° to 30 ° with respect to the horizontal plane. ing. In the present embodiment, the second inclined portion 32 is 45 ° with respect to the horizontal plane, and the first inclined portion 28 is 30 °. Thereby, a rectangular boundary 46 is formed at the joint between the first inclined portion 28 and the second inclined portion 32.

  The front end portion 52 of the second inclined portion 32 is provided with a vertical wall portion 34 that extends upward of the vehicle. The inclination angle of the vertical wall portion 34 with respect to the horizontal plane is set larger than the inclination angle of the second inclination portion 32 with respect to the horizontal plane, and is substantially vertical. Further, the vertical wall portion 34 is provided at a position separated from the connecting member 16 of the rear wheel suspension member 14 in the vehicle front-rear direction, and the front end portion 36 of the vertical wall portion 34 is substantially equal to the height of the connecting member 16 in the vehicle vertical direction. It is extended to the same position.

  The front under cover 20 provided on the vehicle front side of the connecting member 16 includes an under cover 38 that covers the lower surface of the vehicle formed in a substantially flat shape, and extends from the rear end portion 50 of the under cover 38 to the upper side of the vehicle. An inclined portion 40 that is inclined rearward of the vehicle is provided. Further, an upper end 42 of the inclined portion 40 is provided with a folded portion 44 that extends substantially horizontally toward the rear of the vehicle. The folded portion 44 is provided at a position separated from the connecting member 16 in the vehicle front-rear direction. Further, the under cover 38 of the front under cover 20 is attached to the lower side in the vehicle vertical direction than the under cover 26 of the floor under cover 18.

  Further, the floor under cover 18 and the front under cover 20 are provided apart from each other. Therefore, the first inclined portion 28, the second inclined portion 32 and the vertical wall portion 34 of the floor under cover 18 and the inclined portion 40 of the front under cover 20 form an opening 24 that opens downward. A connecting member 16 is provided in the opening 24.

(Action / Effect)
Next, the operation and effect of this embodiment will be described.

  Here, the operation and effect of the present embodiment will be described using the comparative 1 shown in FIG. 3 and the comparative 2 shown in FIG. In addition, about the same component as this embodiment, the same number is attached | subjected and the description is abbreviate | omitted.

  As shown in FIG. 3, in the comparative 1, the flat under cover 106 that covers the lower surface of the rear portion of the vehicle in the floor under cover 100 extends to the vehicle front side. In other words, the floor under cover 18 and the front under cover 20 shown in FIG. 2 are set as an integrally formed cover. In this case, a cover is also provided on the vehicle lower side of the connecting member 16. In other words, the opening 24 is not provided at the position where the connecting member 16 is provided, and the connecting member 16 is hidden by the floor under cover 100 from the outside of the vehicle.

  When the automobile 10 travels straight in the comparative 1, the traveling wind W is smoothly flowed along the surface of the floor undercover 100. However, ice 104 may be formed on the connecting member 16 due to freezing of water adhering to the connecting member 16 itself, or snow rolled up by running may adhere. In addition, when traveling on a rough road, foreign matter such as gravel may enter the floor under cover 100 and be sandwiched between the connecting member 16 and the floor under cover 100. In this state, if the connecting member 16 is moved downward in the vehicle by an input to the rear wheel 12 from the road surface, there is a possibility that ice 104, snow, foreign matter, etc. interfere with the floor under cover 100.

  In contrast 1, the traveling wind W flows smoothly along the surface of the floor under cover 100, so that no negative pressure is generated by the separation of the traveling wind W from the floor under cover 100. Thereby, since the force which presses down the automobile 10 is not generated and the road surface followability of the tire cannot be improved, the maneuverability cannot be improved.

  Next, in the contrast 2 shown in FIG. 4, the floor under cover 108 is attached to the vehicle rear side from the connecting member 16, and the front under cover 20 is attached to the vehicle front side from the connecting member 16. ing. That is, the position where the connecting member 16 is provided is not covered with the cover, and the opening 24 is provided. Further, the floor under cover 108 is provided with a vertical wall portion 114 extending substantially vertically from the front end portion 112 of the under cover 110 to the vehicle upper side.

  When the vehicle goes straight in contrast 2, the traveling wind W flows along the surface of the front under cover 20 toward the rear of the vehicle, jumps from the rear end 50 of the front under cover 20 to the opening 24, and passes through the floor under cover 108. Washed away. At this time, a part of the traveling wind W that cannot jump over the opening 24 collides with the vertical wall portion 114, but the turbulent flow is generated because the vertical wall portion 114 is substantially orthogonal to the direction of the flow of the traveling wind W. Occur. Therefore, the smooth wind flow is hindered and the vehicle aerodynamic characteristics cannot be improved.

  On the other hand, as shown in FIG. 2, the floor under cover 18 provided on the lower surface 22 of the automobile 10 is formed with an under cover 26 that covers the lower surface 22 of the automobile 10. Further, a first inclined portion 28 that is provided at the front end portion 48 of the under cover 26 and is inclined toward the vehicle front side with respect to the vehicle vertical direction in a side sectional view is formed. Furthermore, a second inclined portion 32 that extends from the front end portion 30 of the first inclined portion 28 to the vehicle front side and has a smaller inclination angle toward the vehicle front side with respect to the vehicle vertical direction than the first inclined portion 28; An opening 24 that opens to the vehicle lower side and the vehicle front side is formed on the vehicle front side of the first inclined portion 28 and the second inclined portion 32. Therefore, as shown in FIG. 2 (B), when the traveling wind W flowing in the opening 24 collides with the second inclined portion 32, it flows toward the rear of the vehicle along the second inclined portion 32. Peel off at the boundary portion 46 with the portion 28. That is, a negative pressure is generated in the space V between the traveling wind W and the floor under cover 18, thereby generating a force for pressing the automobile 10 downward and improving the road surface followability of the tire. Become. Further, as shown in FIG. 2A, the first inclined portion 28 is set to have a larger inclination angle toward the vehicle front side with respect to the vehicle vertical direction than the second inclined portion 32. Therefore, the traveling wind W that collided with the first inclined portion 28 flows toward the rear of the vehicle along the first inclined portion 28, but remains smooth without being peeled off from the first inclined portion 28 to the under cover 26. Washed away.

  That is, by providing the floor under cover 18 with a plurality of inclined portions having different angles, it is possible to improve the vehicle aerodynamic characteristics and the maneuverability.

  In addition, the front wall portion 34 of the second inclined portion 32 extends to the upper side of the vehicle, and the vertical wall portion 34 is set to have a smaller inclination angle toward the vehicle front side with respect to the vehicle vertical direction than the second inclined portion 32. Is provided. Therefore, even when traveling on a submerged channel or the like, water or the like can be prevented from entering between the floor under cover 18 and the vehicle body of the automobile 10. Thereby, the floor under cover 18 can be prevented from falling off.

  Furthermore, the inclination angle of the second inclined portion 32 is set to 40 ° to 55 ° with respect to the horizontal plane. Therefore, when the traveling wind W flowing from the front of the vehicle in the substantially horizontal direction collides with the second inclined portion 32, the direction of the wind flow greatly changes along the second inclined portion 32. As a result, it is possible to more effectively generate a force for pushing down the automobile 10 by promoting the separation of the traveling wind at the boundary portion 46 between the first inclined portion 28 and the second inclined portion 32. From these things, the operability can be further improved.

Furthermore, the inclination angle of the first inclined portion 28 is 20 ° to 30 ° with respect to the horizontal plane.
Therefore, when the traveling wind W flowing from the front of the vehicle in the substantially horizontal direction collides with the first inclined portion 28, the direction of the wind flow changes along the first inclined portion 28, but the change in the direction is small. Accordingly, the traveling wind W can be smoothly flowed from the first inclined portion 28 to the under cover 26 while being adhered without being peeled off from the surface of the floor under cover 18. From these things, a vehicle aerodynamic characteristic can be improved more.

  The automobile 10 is provided with a front under cover 20 that is provided below the first inclined portion 28 in the vehicle vertical direction and in front of the opening 24 and covers the lower surface 22 of the automobile 10. Therefore, when the automobile 10 is traveling straight, the traveling wind W flows under the front under cover 20 and jumps over the spaced opening 24 to the first inclined portion 28 of the floor under cover 18. For this reason, the traveling wind W can flow smoothly from the first inclined portion 28 to the under cover 26. Further, as shown in FIG. 2B, when a cross wind blows to the automobile 10 or at the time of turning, the running wind does not flow along the front under cover 20 and does not flow from the side surface of the automobile 10. It flows directly through to the floor under cover 18. In this case, the traveling wind that has collided with the second inclined portion 32 flows to the vehicle lower side along the second inclined portion 32 and is separated at the boundary portion 46 with the first inclined portion 28. Therefore, a negative pressure is generated in the space V between the traveling wind and the floor under cover 18, and a force for pressing the automobile 10 downward is generated. Thereby, the road surface followability of a tire can be improved. For these reasons, it is possible to improve the vehicle aerodynamic characteristics when traveling straight, and to improve the operability when turning.

  Furthermore, in the floor under cover 18 according to the present embodiment, the following effects can be obtained.

  In the floor under cover 18 according to the present embodiment, the first inclined portion 28, the second inclined portion 32, and the vertical wall portion 34 are provided along the vehicle width direction. That is, a ridge line is formed along the vehicle width direction at the front end portion 48 of the under cover 26, the front end portion 30 of the first inclined portion 28, and the front end portion 52 of the second inclined portion 32. Therefore, since the rigidity of the floor under cover 18 is improved, the thickness of the floor under cover 18 can be reduced when the rigidity is equal to that of the conventional cover, and ribs for reinforcement are eliminated. can do. As a result, the floor under cover 18 can be reduced in weight and can be easily manufactured.

  In the present embodiment, the floor under cover 18 is provided on the vehicle rear side. However, the configuration is not limited to the vehicle rear side, and the floor under cover 18 is attached to the front side of the automobile 10 such as the vicinity of a front suspension member (not shown). It is good. In this case, the traveling wind W hits the first inclined portion 28 during normal traveling, and the second inclined portion 32 is attached so as to improve the operability when turning. In this way, when the traveling wind W collides with the first inclined portion 28 during normal traveling, the direction of the wind flow changes along the first inclined portion 28, but the change in the direction is small. Therefore, it is possible to smoothly flow from the first inclined portion 28 to the under cover 26 while adhering without being peeled off from the surface of the floor under cover 18. Therefore, vehicle aerodynamic characteristics can be improved. Further, when the traveling wind W collides with the second inclined portion 32, the direction of the wind flow changes greatly along the second inclined portion 32. Therefore, it is possible to more effectively generate a force that further promotes the separation of the traveling wind at the boundary portion 46 between the first inclined portion 28 and the second inclined portion 32 and presses the automobile 10 downward. That is, the aerodynamic characteristics and the maneuverability are adjusted according to the vehicle characteristics of the automobile 10 by changing the arrangement position and number of the floor undercovers 18 according to the vehicle characteristics and changing the position where the traveling wind hits. Is possible.

  Moreover, in this embodiment, although the junction part of the under cover 26 of the floor under cover 18 and a 1st inclination part is set as the structure formed in square shape, it is not limited to this but is formed in R shape. Also good.

  Furthermore, the front under cover 20 is attached below the floor under cover 18 in the vertical direction of the vehicle. However, the present invention is not limited to this, and the traveling wind W flowing along the front under cover 20 is the second of the floor under cover 18. Any position that collides with the inclined portion 32 may be attached to another position.

  The embodiment of the present invention has been described above, but the present invention is not limited to the above, and various modifications other than those described above can be implemented without departing from the spirit of the present invention. Of course.

  Next, a floor under cover as a reference example to which the present invention is not applied will be described.

(First Reference Example)
First, the floor under cover 18 according to the first reference example will be described with reference to FIG. Note that parts and components that are basically the same as those of the above-described embodiments are denoted by the same reference numerals and description thereof is omitted.

  As shown in FIG. 5, in the first reference example, the floor under cover 116 and the front under cover 20 are provided apart from each other, and the connecting member 16 is provided in the opening 24 that is the separation part. Yes. The floor under cover 116 includes an under cover 118 formed in a flat plate shape, and a first inclined portion 120 that is inclined from the front end portion 122 of the under cover 118 toward the vehicle front side in the vehicle vertical direction in a side sectional view. It has been. In this reference example, the angle of the first inclined portion 120 is 45 ° with respect to the horizontal plane.

  With this configuration, even when the traveling wind W flows along the front under cover 20 or when it does not flow along the front under cover 20 and directly collides with the floor under cover 116, the traveling wind always flows. 1 collides with the inclined portion 120. Accordingly, the traveling wind flows along the first inclined portion 120 toward the vehicle lower side and is peeled off at the boundary portion 124 with the under cover 118. Thereby, the improvement of operability is achieved.

(Second reference example)
Next, the floor under cover 126 according to the second reference example will be described with reference to FIG. Note that parts and components that are basically the same as those of the above-described embodiments are denoted by the same reference numerals and description thereof is omitted.

  As shown in FIG. 6, in this reference example 2, the floor under cover 126 includes an under cover 128 formed in a substantially planar shape and a vehicle cross-sectional view from the front end portion 130 of the under cover 128 with respect to the vehicle vertical direction. A first inclined portion 132 that is inclined toward the vehicle front side is provided. The connecting portion 102 between the under cover 128 and the first inclined portion 132 is formed in an R shape, and in the present reference example, the connecting portion 102 is formed with a curvature of about R100.

  With this configuration, the traveling wind W is connected even when the traveling wind W flows along the front under cover 20 or does not flow along the front under cover 20 and directly collides with the floor under cover 126. Collide with part 102. Therefore, the traveling wind can flow smoothly to the under cover 128 while adhering to the surface of the connecting portion 102 without being peeled off. As a result, the vehicle aerodynamic characteristics are improved.

10 Vehicle (Automobile)
18 Floor under cover 20 Front under cover 22 Lower surface 24 Opening portion 28 First inclined portion 30 Front end portion 32 Second inclined portion 34 Vertical wall portion 48 Front end portion 52 Front end portion

Claims (5)

A flat under cover that is disposed below the floor of the rear of the vehicle and covers the lower surface of the rear of the vehicle;
A first inclined portion that is provided at a front end portion of the under cover and is inclined toward the vehicle front side with respect to the vehicle vertical direction in a side sectional view;
A second inclined portion that extends from the front end portion of the first inclined portion toward the vehicle front side, and has a smaller inclination angle toward the vehicle front side with respect to the vehicle vertical direction than the first inclined portion;
An opening formed on the vehicle front side of the first inclined portion and the second inclined portion and opening to the vehicle lower side and the vehicle front side;
Floor under cover structure having. The vertical wall portion that extends from the front end portion of the second inclined portion to the vehicle upper side and is set to have a smaller inclination angle toward the vehicle front side with respect to the vehicle vertical direction than the second inclined portion.
The floor undercover structure according to claim 1. The inclination angle of the second inclined portion is 40 ° to 55 ° with respect to the horizontal plane.
The floor undercover structure according to claim 1 or 2. The inclination angle of the first inclined portion is 20 ° to 30 ° with respect to the horizontal plane.
The floor undercover structure according to claim 1. The front under cover is provided below the first inclined portion in the vehicle vertical direction and on the front side of the opening, and covers the lower surface of the vehicle.
The floor undercover structure according to claim 1.

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