JP3261335B2 - Body front structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle body front structure, and more particularly to a mudguard plate of a vehicle body and a bottom structure in the vicinity thereof.

[0002]

2. Description of the Related Art In recent years, aerodynamic characteristics have been improved for the purpose of energy saving of vehicles, and among them, reduction of air resistance of wheels has been attempted. In order to reduce the air resistance of the wheels, it is well known that a spoiler, which is generally called a chin spoiler, is provided below the front end of the vehicle body to reduce the projected area of the wheels toward the front of the vehicle.

[0003]

However, in the means using the chin spoiler as described above, since a downward projecting part is provided at the lower front end of the vehicle, not only the minimum ground clearance is reduced, but also the approach angle is generally reduced. In other words, there is a problem in that the angle referred to as the hill climbing angle, that is, the angle at which the hill can be climbed becomes small. Therefore, the applicant of the present application has focused on the above-mentioned conventional problems, and improves the aerodynamic characteristics by using a fender protector that is a mudguard portion provided inside the fender or an under cover that covers the bottom surface of the vehicle. That was invented. By the way, as a conventional fender protector, for example, the one described in Japanese Utility Model Laid-Open No. 6-57773 (inna fender) is known. This publication describes a technique for improving the drainage performance of the fender protector, but conventionally, it has not been performed to improve the aerodynamic performance using such a fender protector or underguard. .

[0004]

According to a first aspect of the present invention, there is provided a vehicle body front structure in which a thin arched fender protector is provided inside a front fender panel so as to cover a front wheel. The horizontal general part (6) of the under cover (6) covering the bottom of the front engine room
c) overlaps the front end of the fender protector in the front- rear direction.
A tangent line extending in the vehicle width direction to a position in front of the front wheel (FW) so that the front end edge of the fender protector and the rear end edge of the undercover extend or extend in the vehicle width direction. At least one of a front end edge of the fender protector and a rear end edge of the under cover, which protrudes below the height of the horizontal general portion (6c) of the under cover (6) and is higher than the front wheel. It is characterized in that a wide flange is provided.

According to a second aspect of the present invention, a front fender is provided.
Inside the panel, a thin arched fender protector
Is provided to cover the front wheels, and
Horizontal general part (6) of the undercover (6) covering the bottom
c) overlaps the front end of the fender protector in the front-rear direction.
Extends in the vehicle width direction to the position in front of the front wheel (FW)
The front edge of the fender protector and the under cover
The tangent to or near the rear edge extends in the vehicle width direction
And a part of the undercover extending in the vehicle width direction.
Is located at a position near the tangent line of the under cover (6).
And projecting below the height of the general part (6c).
Is provided with an embossed part wider than the front wheel
It is characterized by being . The invention described in claim 3 is a flow chart.
Inside the front fender panel
A protector is provided to cover the front wheels, and an engine
The under cover (6) covering the bottom of the gin room is
At a position inside the front wheel in the direction
The underside of the arched lower end
A front extension portion extending forward of the vehicle along the side of the bar
(1c) is formed, and the front extending portion is inward in the vehicle width direction.
The edge and the outer edge of the under cover in the vehicle width direction are in contact with or near
A tangent line extending in the front-rear direction of the vehicle;
In a part of the shape, the front end is located near the lower end of the arch shape.
Project below the general height of the under cover (6)
Embossed part that is wider than the front wheel
(11) is provided .

[0006]

When the vehicle travels, of the air flowing between the vehicle body and the road surface, the air traveling toward the front wheels is rectified by the flange and does not reach the front wheels. And the flange is arrange | positioned just before a front wheel, and the space | interval of a flange and a front wheel can be narrowed. Therefore, compared to the technology of providing a spoiler under the front end of the vehicle body, if the ground clearance is the same, the angle of the approach angle connecting the installation position of the front wheels and the lowest point of the vehicle front can be increased, and , disturbance in the flow of air have difficulty caused between the flange and the front wheel.

According to the second aspect of the invention, the same rectifying effect and approach angle as those of the first aspect of the invention can be obtained by the embossed portion projecting from the under cover. In the third aspect of the present invention, the embossed portion projecting from the front extending portion of the fender protector, according to claim 1 same rectification effect and approach angle of the structure described is Ru obtained.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. (Embodiment 1) FIG. 1 is a perspective view showing Embodiment 1, FIG. 2 is a longitudinal sectional view of Embodiment 1, and FIG.
FIG. 4 is a sectional view taken along line S4-S4 of FIG.

In FIG. 1, reference numeral 1 denotes a fender protector. The fender protector 1 is formed of a resin in a thin plate state, and as shown in FIG.
And is formed in an arch shape so as to cover the upper side of the front wheel FW. In FIG. 4, reference numeral 4 denotes a side member extending in the front-rear direction on the side of the vehicle. In FIG. 4, reference numeral 5 denotes a hood ridge rain hose for reinforcing the hood ridge 3.

Returning to FIG. 1, reference numeral 6 denotes an under cover. This under cover 6 is provided to cover the bottom of the engine room ER for rectifying the air flow on the lower surface of the vehicle and protecting the engine and accessories, as shown in FIGS. The horizontal general portion 6c extends in the vehicle width direction until it is positioned in front of the front wheel FW. The under cover 6 is supported on the lower edge of the side member 4 and the bumper 7 as shown in FIGS.

As described above, the under cover 6 extends in the vehicle width direction to the front position of the front wheel, and the tangent between the front edge of the fender protector 1 and the rear edge of the under cover 6 is It is formed in the width direction. The fender protector 1 has a protector-side flange 1a, and the undercover 6 has a cover-side flange 6a which is suspended downward from the general portion 6c of the undercover 6, with the tangent line interposed therebetween. These flanges 1
Both a and 6a are formed to have substantially the same width that is wider than the front wheel FW, and the protector-side flange 1a extends slightly below the cover-side flange 6a. The two flanges 1a and 6a are integrally connected by a screw in a contact state as shown in FIG.
As shown in FIG. 1, the front end of the fender protector 1 and the cover-side flange 6a of the under cover 6 have two ribs 1b, 6b extending in the vertical direction so as to fit each other. I have.

In the vehicle body front structure according to the first embodiment described above, both flange portions 1a and 6a cover the entire front side of the front wheel FW in the width direction up to a predetermined height at a low level above the ground. Therefore, aerodynamic performance is improved. In this structure, the distance between the flange portions 1a and 6a and the front wheel FW is shorter than the conventional case where the chin spoiler 01 is provided at the lower front end of the vehicle body (see FIG. 2). And the rectification performance is high during the period from the rectification to the front wheel FW. In addition, the approach angle AA has the angle shown in FIG. 2, and therefore, compared to the case where the chin spoiler 01 is provided, if the approach angle AA is the same, both the flange portions 1a and 6a have the front wheels FW.
Can have a large projected area, and therefore high aerodynamic performance can be obtained. Or, in other words, in the same aerodynamic performance, the first embodiment has the approach angle A
A can be increased, and traveling performance can be improved. Further, since the spoiler performance is obtained by using the fender protector 1 and the under cover 6, the cost can be reduced as compared with the technique of separately providing a spoiler. Further, in the first embodiment, since the two flange portions 1a and 6a are integrally connected and the ribs 1b and 6b are provided at the portions of the two flange portions 1a and 6a, high rigidity can be obtained and durability can be improved. Excellent aerodynamic performance is obtained.

(Embodiment 2) Next, Embodiment 2 shown in FIGS. 5 and 6 will be described. In the description of the second embodiment, the same components as those in the first embodiment are denoted by the same reference numerals as those in the first embodiment, and the description thereof will be omitted. Only the differences from the first embodiment will be described. . In the second embodiment, as shown in FIG. 5, the fender protector 1 is provided with a front extending portion 1c which extends forward to a side position of the engine room ER. 3 extends only in the vehicle width direction to the vicinity of the position of the side member 4 shown in FIG. Embodiment 2 is different from Embodiment 1 in that a tangent line, which is a line in which the outer edge of the vehicle and the under cover 6 abuts on or approaches the vehicle width direction, extends in the vehicle front-rear direction.

The front extension 1c of the fender protector 1 is provided with an embossed portion 11 projecting downward in the shape of an inverted quadrangular pyramid at the front position of the front wheel FW as shown in FIG. The embossed portion 11 has an entire width that covers the entire width of the front wheel FW in the width direction, and the bottom surface 11a is inclined in a shape along the approach angle AA. In the second embodiment described above, similarly to the first embodiment, the approach angle AA can be increased while obtaining a desired high aerodynamic performance by the embossed portion 11, and is advantageous in cost. In addition, in the second embodiment, the rigidity of the front extending portion 1c can be ensured by the embossed portion 11. In addition, since the bottom surface 11a of the embossed portion 11 is inclined at the angle of the approach angle AA, the approach angle A
A can be increased.

In the second embodiment, the front extending portion 1c of the fender protector 1 extends in front of the front wheel FW.
However, in the structure in which the undercover 6 extends in front of the front wheel FW as in the first embodiment, the embossed portion 11 may be formed on the undercover 6.

[0016]

As described above, in the vehicle body front structure according to the first aspect, at least one of the fender protector and the undercover protrudes below the height of the general portion of the undercover and extends from the front wheel. Because the wide flange is provided in front of the front wheel, aerodynamic performance can be obtained without providing a spoiler at the lower front end of the vehicle body, and the effect that it is advantageous in terms of cost is obtained. Since the distance between the flange and the front wheel can be reduced, compared to the technology of installing a spoiler under the front end of the vehicle body, if the ground clearance is the same, the approach angle connecting the installation position of the front wheel and the lowest point of the front of the vehicle body it is possible to deepen the angle, disturbance in the flow of air hardly occurs between the flange and the front wheels, that Sosu the effect of high aerodynamic performance.

According to the second aspect of the present invention, since the undercover is provided with the embossed portion at the front position of the front wheel, aerodynamic performance can be obtained without providing a spoiler at the lower front end of the vehicle body. It is advantageous in terms of cost, and since the distance between the embossed portion and the front wheel can be narrowed, compared to the technology of providing a spoiler at the lower front end of the vehicle body, if the ground clearance is the same, the front wheel The approach angle connecting the installation position and the lowermost point of the front of the vehicle body can be deepened, and the air flow between the embossed part and the front wheels is less likely to be disturbed, resulting in high aerodynamic performance. To play. According to the third aspect of the present invention, since the embossed portion is protruded from the front extending portion of the fender protector at the front position of the front wheel, aerodynamic performance can be obtained without providing a spoiler at a lower front end of the vehicle body. Can be obtained, and the effect of cost advantage can be obtained.
Moreover, since the distance between the embossed portion and the front wheel can be reduced,
Compared to the technology of installing a spoiler under the front end of the vehicle body, if the ground clearance is the same, the angle of the approach angle connecting the installation position of the front wheel and the lowest point of the front of the vehicle body can be deepened, and the embossed part and disturbance in the flow of air hardly occurs between the front wheels, that Sosu <br/> the effect of high aerodynamic performance.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a vehicle body front structure according to Embodiment 1 of the present invention.

FIG. 2 is a longitudinal sectional view of the first embodiment.

FIG. 3 is a sectional view taken along line S3-S3 of FIG. 2;

FIG. 4 is a sectional view taken along line S4-S4 of FIG. 2;

FIG. 5 is a perspective view showing a second embodiment.

FIG. 6 is a longitudinal sectional view showing the second embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Fender protector 1a Protector side flange 1b Rib 1c Front extension part 2 Front fender panel 3 Food ridge 4 Side member 5 Food ridge reinforcement 6 Under cover 6a Cover side flange 6b Rib 7 Bumper 11 Embossed part 11a Bottom surface FW Front wheel ER Engine room AA approach angle

──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Hiroyuki Ide 10-1, Amanuma, Hiratsuka-shi, Kanagawa Prefecture Nissan Shatai Co., Ltd. (56) References JP-A-6-316278 (JP, A) Jpn. (JP, U) Japanese Utility Model 63-142280 (JP, U) Japanese Utility Model 1-76372 (JP, U) Japanese Utility Model 63-139182 (JP, U) Japanese Utility Model 61-26280 (JP, U) Kaihei 6-57773 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) B62D 25/18 B62D 25/20

Claims (3)

(57) [Claims] 1. A thin plate inside a front fender panel
An arched fender protector is provided to cover the front wheels, and an under cover that covers the bottom of the engine room at the front of the vehicle
The front wheel (FW) is arranged such that the horizontal general portion (6c) of (6) overlaps the front end of the fender protector in the front- rear direction.
A tangent line extending in the vehicle width direction to the front position and in which the front edge of the fender protector abuts or approaches the rear edge of the under cover extends in the vehicle width direction, and the front edge of the fender protector sandwiching the tangent line And at least one of a rear end edge of the under cover and a flange wider than the front wheel and protruding below the height of the horizontal general portion (6c) of the under cover (6) . A vehicle body front structure characterized by the following. (2)A thin plate inside the front fender panel
An arched fender protector is provided over the front wheels
And Undercover that covers the bottom of the engine room at the front of the vehicle
The horizontal general portion (6c) of (6) is the Fender pro
Of the front wheel (FW) so that it overlaps the front end of the
Extending in the vehicle width direction to the front position,
The front edge of the tekta and the rear edge of the under cover are in contact or close
A tangent line that extends is extended in the vehicle width direction, A part of the undercover extending portion in the vehicle width direction includes a front part.
A general part of the under cover (6) is located near the tangent line.
(6c) projecting below the height and the front wheel
That the embossed portion is wider than
A vehicle body front structure characterized by: (3)A thin plate inside the front fender panel
An arched fender protector is provided over the front wheels
And Undercover that covers the bottom of the engine room at the front of the vehicle
(6) is provided inside the front wheel in the vehicle width direction, At the front end of the fender protector,
Extending from the end to the front of the vehicle along the sides of the undercover
The front extension portion (1c) is formed, and the front extension portion is formed.
Of the under cover and the outer edge of the under cover in the vehicle width direction
A tangent line that abuts or approaches is extended in the longitudinal direction of the vehicle, A part of the front extending portion has a lower end portion of the arch shape.
Near the general part height of the under cover (6)
Also project downward and are wider than the front wheels.
Embossed part (11) provided Characterized by
Car body front structure.