JP6763828B2 - Body undercover structure - Google Patents

Description

The present invention relates to a vehicle body undercover structure.

The lower part of the vehicle body is usually closed by a flat plate-shaped undercover.
In such a structure using the undercover (hereinafter referred to as “vehicle body undercover structure”), the space above the undercover may form a flow path for the traveling wind.
For example, the space above the engine undercover of Patent Document 1 is a flow path for supplying running wind to the engine arranged on the rear side of the engine room.
Further, in Patent Document 2, the space above the engine undercover (the space between the engine undercover and the engine) is a flow path for supplying running wind to a radiator arranged behind the engine.

Further, in the undercover structure of Patent Document 3, a notch is formed in a portion of the undercover below the catalyst, and the heat of the catalyst is released to the lower part of the undercover through the notch.

Japanese Patent No. 6127248 Japanese Patent No. 5772538 Japanese Patent No. 5734036

By the way, when the lower end of the engine is close to the engine undercover, the space above the engine undercover (flow path of the running wind) cannot be secured, and the running wind is sent to the cooling parts located behind the engine and need to be cooled. Cannot supply.
On the other hand, although a method of forming an opening for opening the engine, cooling parts, etc. in the engine undercover to dissipate heat from the engine or the like can be considered, the opening becomes relatively large and the engine oil filter is opened. Therefore, it is necessary to avoid chipping to the engine oil filter.

Therefore, the present invention is an invention devised in view of the above background, and is a vehicle body undercover that can cool the engine and the cooling parts behind the engine even when the lower end of the engine is close to the engine undercover. The challenge is to provide the structure.

As a means for solving the above problems, the vehicle body undercover structure according to the present invention includes an engine undercover that covers at least a part of an engine room in which an oil filter element, an engine, and cooling parts are arranged in order from the front. A vehicle body undercover structure, which is formed in the engine undercover, at least an opening for opening the oil filter element and the engine, a recess formed by denting the front edge of the opening upward, and a recess of the recess. It is a space behind, and includes a supply path for supplying the running wind introduced from the recess to the engine and a guard member covering the oil filter element, and the guard member is provided with respect to the supply path. Adjacent to the vehicle width direction, the guard member rises from a substantially horizontal plate-shaped lower wall portion that covers the lower part of the oil filter element and the end of the lower wall portion, and separates the supply path and the oil filter element. The lower wall portion includes a partition wall portion, and the lower wall portion has a curved first curved wall portion that is located upward as it approaches the partition wall portion side.

According to the vehicle body undercover structure of the present invention, it is possible to provide a vehicle body undercover structure capable of cooling the engine and the cooling parts behind the engine even when the lower end of the engine is close to the engine undercover.

It is the bottom view which looked at the car body front structure which applied the car body under cover structure of embodiment from the bottom. FIG. 1 is an end view taken along the line II-II of FIG. It is an enlarged view which extracted and enlarged a part (around the engine) of FIG. It is a perspective view which looked at the vicinity of a guard member from the lower side and the left front side. FIG. 3 is an end view taken along the line VV of FIG. FIG. 3 is an end view taken along the line VI-VI of FIG. FIG. 3 is an end view taken along the line VII-VII of FIG.

Next, the vehicle body undercover structure according to the embodiment will be described with reference to the drawings. In addition, the vehicle to which the vehicle body undercover structure is applied and the vehicle body front structure will be described first, and then the vehicle body undercover structure will be described.

(vehicle)
As shown in FIG. 1, in the vehicle 100 of the embodiment, an engine room R is formed in the front portion of the vehicle body, and the engine transmission unit 1 is mounted in the engine room R.
The engine / transmission unit 1 is a device in which an engine 2 and a transmission (not shown) are unitized (integrated), and are fixed to three engine mounts 10 described later.

(Car body front structure)
As shown in FIG. 1, the vehicle body front structure of the vehicle 100 has a pair of side frames 3 and 3 separated from each other in the left-right direction and extending in the front-rear direction and a pair of side frames 3 and 3 as main skeleton members. A subframe 4 spanned in the left-right direction and an engine undercover 5 covering from below the engine room R are provided.
Further, on the front side of the pair of side frames 3 and 3, a front bumper lower cover 6 and a front bumper face 7 extending in the left-right direction are provided.

The engine undercover 5 is a resin product extending in the front-rear direction and the left-right direction. An opening 8 penetrating in the vertical direction is formed in the central portion of the engine undercover 5. The left half of the opening 8 is closed by the transmission cover 9.

The transmission cover 9 is a metal component that suppresses chipping to the transmission. Further, the transmission cover 9 is detachably fixed to the engine under cover 5, and the transmission can be maintained from below the vehicle body.

As shown in FIG. 2, the engine undercover 5 is located downward toward the rear and is gently inclined in the front-rear direction (front edge portion 8a, virtual line L1, and trailing edge portion 8b of the opening in FIG. 2). See). The virtual line L1 assumes a location (height) where the engine undercover 5 extends when the opening 8 is not formed. The details of the opening 8 will be described later.

(Engine mount)
As shown in FIG. 2, an engine mount 10 (hereinafter, may be referred to as “rear engine mount 10”) that supports the engine transmission unit 1 from the rear is provided at the front end of the upper surface of the subframe 4.
The engine mount 10 includes a rod-shaped connecting portion 11 extending in the front-rear direction between the engine transmission unit 1 and the subframe 4, and the connecting portion 11 and the engine transmission unit 1 penetrating the front end of the connecting portion 11 in the left-right direction. The front fastener 12 for fastening the joint portion 11 and the rear fastener 13 for fastening the connecting portion 11 and the subframe 4 through the rear end of the connecting portion 11 in the front-rear direction are provided.
Further, in the front fastener 12 and the rear fastener 13, cylindrical mount rubbers 14 and 15 are provided on the outer peripheral side of the shaft portion penetrating the connecting portion 11, and vibration transmitted from the engine / transmission unit 1 to the vehicle body is generated. It is designed to decay.
In addition, although not particularly shown, the remaining two engine mounts are provided on a pair of side frames 3 and 3, and support the engine transmission unit 1 from both the left and right sides.

Of the engine transmission units 1 supported by the three engine mounts 10, the transmission (not shown) is arranged on the left side in the engine room R.
On the other hand, as shown in FIG. 1, the engine 2 is arranged on the right side in the engine room R and in the central portion in the front-rear direction. Further, the oil filter element 2a fixed to the engine 2 is located on the front side of the engine 2. Further, a rear engine mount 10 is located behind the engine 2.
Therefore, on the right side of the engine room R, the oil filter element 2a, the engine 2, and the rear engine mount 10 (cooling parts) are arranged in a substantially straight line from the front.

As shown in FIG. 2, an oil pan 2b is provided in the lower part of the engine 2.
The engine 2 is located relatively lower in the engine room R, and the lower surface 2c of the oil pan 2b is close to the virtual line L1. In other words, when the opening 8 is not formed, the lower end of the engine 2 is close to the engine undercover 5, and the flow path of the running wind cannot be secured above the engine undercover 5.
A part of the rear engine mount 10 is located below the lower surface 2c of the oil pan 2b (see the auxiliary line L2 in FIG. 2).

(Body undercover structure)
Next, the vehicle body undercover structure will be described.
As shown in FIG. 3, the vehicle body undercover structure includes an opening 8 formed in the engine undercover 5, a recess 20 provided in the front edge portion 8a of the opening 8, and running wind introduced from the recess 20 in oil. A supply path 21 for supplying to the pan 2b (engine 2) and a guard member 30 for covering the oil filter element 2a are provided.

(Opening)
The opening 8 opens the oil filter element 2a, the engine 2, and the transmission (not shown). Further, the opening 8 is extended rearward, and a part of the rear engine mount 10 is opened from the opening 8.

(Recess, supply path)
As shown in FIG. 3, the recess 20 is formed by recessing the front edge portion 8a of the opening 8 upward. Therefore, the recess 20 is located above the front edge 8a of the opening 8 and has a height substantially equal to that of the oil pan 2b (engine 2).
The supply path 21 is a space behind the recess 20 and extends linearly from the recess 20 to the rear oil pan 2b.
Further, the front bumper lower cover 6 and the front bumper face 7 do not block the front of the recess 20.
From the above, the traveling wind is introduced into the recess 20 while the vehicle is traveling (see arrow A1 in FIG. 3). Further, the traveling wind introduced into the recess 20 passes through the supply path 21 and hits the front wall of the oil pan 2b, and the oil pan 2b (engine 2) is cooled (see arrow A2 in FIG. 3).

(Guard member)
As shown in FIG. 4, the guard member 30 is a component for preventing chipping to the oil filter element 2a, and is adjacent to the recess 20 and the supply path 21 on the right side (vehicle width direction).
The guard member 30 has a substantially horizontal plate-shaped lower wall portion 31 arranged below the oil filter element 2a, a partition wall portion 40 rising upward from the left end of the lower wall portion 31, and an opening 8 continuous with the lower wall portion 31. It is provided with a fixing portion 50 fixed to the edge portion of the.

(Lower wall)
The lower wall portion 31 covers the front lower side of the oil filter element 2a. Therefore, pebbles and the like flying from the front come into contact with the lower wall portion 31 to prevent contact with the oil filter element 2a.
As shown in FIG. 2, the lower surface of the lower wall portion 31 forms a surface continuous with the lower surfaces of the front bumper lower cover 6 and the front bumper face 7 arranged in the front.
Therefore, the traveling wind flowing along the lower surfaces of the front bumper lower cover 6 and the front bumper face 7 continues to flow backward along the lower surface of the lower wall portion 31 (see arrow B1 in FIG. 2).

Further, the central portion of the lower wall portion 31 in the left-right direction (see the center line O in FIGS. 3 and 4) extends substantially straight rearward from the front edge portion 8a of the opening 8 and is the same as the lower end of the engine 2. It is the height.
Therefore, the traveling wind flowing rearward along the central portion of the lower wall portion 31 flows rearward from the rearmost end (hereinafter, referred to as apex P) of the central portion of the lower wall portion 31 and flows below the lower surface 2c of the engine 2. It passes and hits the rear engine mount 10 (see arrow B2 in FIG. 2).
As a result, the mount rubbers 14 and 15 of the rear engine mount 10 are cooled, and deterioration of the mount rubbers 14 and 15 is suppressed.

Here, the rear portion (part) of the rear engine mount 10 is arranged above the trailing edge portion 8b of the opening 8. Further, the trailing edge portion 8b of the opening 8 is located below the lower surface 2c, which is the lower end of the engine 2. Therefore, the traveling wind that has passed below the engine 2 enters above the trailing edge 8b of the opening 8. Then, the running wind flows into the engine room R, and the rear engine mount 10 (particularly the rear mount rubber 15) is cooled.

As shown in FIG. 4, the lower wall portion 31 includes a substantially flat flat wall portion 32 located on the front side and a curved curved wall portion 33 located on the rear side.
The flat wall portion 32 extends rearward from the front edge portion 8a of the opening 8.
As shown in FIG. 5, the flat wall portion 32 has a substantially flat shape along the center line O, and the traveling wind flowing from the front is less likely to be disturbed. Therefore, it is difficult to reduce the amount of running wind flowing from the flat portion 32 to the curved wall portion 33.
As shown in FIG. 6, the curved wall portion 33 is continuous with the rear end of the flat wall portion 32 and is located upward from the center line O in the left-right direction.
Hereinafter, the portion of the curved wall portion 33 on the left side of the center line O is referred to as the left curved wall portion (first curved wall portion) 34, and the portion on the right side of the center line O is referred to as the right curved wall portion (second curved wall portion). Part) 35.

The left curved wall portion (first curved wall portion) 34 has a curved surface shape that is located upward as it approaches the partition wall portion 40 side from the center line O. Therefore, the corners formed by the left curved wall portion 34 and the partition wall portion 40 are rounded, and the traveling wind flowing along the partition wall portion 40 is guided to the left curved wall portion 34 side.
That is, as shown in FIG. 4, the traveling wind flowing backward along the partition wall portion 40 is guided to the lower surface side of the left curved wall portion 34 (see arrow C1 in FIG. 4), and is on the lower surface of the left curved wall portion 34. Toward the center line O side of the lower wall portion 31 (see arrow C2 in FIG. 4).
As a result, the amount of running wind flowing rearward from the apex P of the lower wall portion 31 is increased (the amount of running wind supplied to the rear engine mount 10 is increased), and the cooling performance for cooling the rear engine mount 10 is improved.

As shown in FIG. 5, a bent portion 32a bent slightly upward is formed on the left end side of the flat wall portion 32.
The amount of bending of the bent portion 32a increases toward the rear. Therefore, as shown in FIG. 7, the left end portion 32b of the flat wall portion 32 is positioned upward toward the rear.
Further, the left end portion 34b (see FIG. 6) of the left curved wall portion 34 is positioned upward toward the rear.
From the above, as shown in FIG. 7, the left end side of the lower wall portion 31 (the left end portion 32b of the flat wall portion 32 and the left end portion 34b of the left curved wall portion 34) rises toward the rear.
The right curved wall portion 35 will be described later.

As shown in FIG. 4, the partition wall portion 40 extends rearward from the recess 20 and extends over the fixed portion 50, the flat wall portion 32, and the curved wall portion 33 (left curved wall portion 34). That is, the partition wall portion 40 separates the supply path 21 from the oil filter element 2a. According to this, it is difficult for the traveling wind flowing through the supply path 21 to enter above the lower wall portion 31. Further, the partition wall portion 40 is perpendicular to the lower wall portion 31, and improves the rigidity of the lower wall portion 31 in the vertical direction.

The upper end 40a of the partition wall portion 40 is located upward in a stepwise manner (stepped) toward the rear. Here, the traveling wind that has passed through the recess 20 and flows backward on the supply path 21 may shift in the vertical direction or the horizontal direction as it separates from the recess 20. However, according to the partition wall portion 40, it is possible to prevent the traveling wind from shifting to the right side and entering the upper part of the lower wall portion 31, and it is possible to suppress a decrease in the traveling wind for cooling the engine.

Here, as described above, since the left end portion of the lower wall portion 31 rises toward the rear, the lower end 40b of the partition wall portion 40 continuous with the left end portion of the lower wall portion 31 also rises upward toward the rear. It is designed to be located. Therefore, the traveling wind flowing along the lower end 40b side of the partition wall portion 40 is likely to be guided to the left curved wall portion 34 (lower wall portion 31) side. As a result, the amount of traveling wind flowing rearward from the apex P of the lower wall portion 31 is increased, and the cooling performance for cooling the rear engine mount 10 is improved.

As shown in FIG. 4, the fixing portion 50 is formed between a substantially L-shaped L-shaped portion 51 extending along the edge of the corner portion of the opening 8 and the L-shaped portion 51 and the lower wall portion 31. It is provided with an extending vertical wall portion 52.
The L-shaped portion 51 is superposed on the lower surface of the edge portion of the opening 8.
The L-shaped portion 51 is penetrated from below by a screw (fixing member) 53 fastened to the engine undercover 5, and is fastened to the head 53a of the screw (fixing member) 53.
Therefore, the guard member 30 is detachably fixed to the engine under cover 5, and the guard member can be removed to replace the engine oil filter 2a.

Further, the L-shaped portion 51 is formed with a recess 54 for accommodating the head portion 53a of the screw 53.
The recess 54 prevents the head portion 53a of the screw 53 from protruding downward from the lower surface of the L-shaped portion 51 (see FIG. 5).
In addition, a recess 8c having the same shape as the L-shaped portion 51 is formed at the edge of the opening 8 so that the L-shaped portion 51 does not protrude below the lower surface of the engine undercover 5. From the above, the traveling wind flowing along the edge portion of the opening 8 and the L-shaped portion 51 is unlikely to be disturbed.

As shown in FIG. 4, the vertical wall portion 52 has a substantially triangular shape when viewed from the side.
The upper end of the vertical wall portion 52 is continuous with the right end of the flat wall portion 32 and the right curved wall portion 35, and the vertical wall portion 52 is recessed upward in cooperation with the flat wall portion 32 and the right curved wall portion 35. The groove wall portion 55 is formed.
Further, the right curved wall portion 35 has a curved surface shape that is located upward as it approaches the vertical wall portion 52 (fixed portion 50) side from the center line O.
According to the above configuration, the traveling wind flowing backward along the L-shaped portion 51 is guided into the groove wall portion 55 along the vertical wall portion 52 (see arrow D1 in FIG. 4), and the right curved wall portion 35. On the lower surface of the lower wall portion 31, the lower wall portion 31 is guided toward the center line O side (see arrow D2 in FIG. 4). As a result, the traveling wind flowing rearward from the apex P of the lower wall portion 31 is further increased, and the cooling performance for cooling the rear engine mount 10 is improved.

As described above, according to the embodiment, the engine 2 and the rear engine mount (cooling component) 10 can be cooled by a simple structure.

Although the embodiments have been described above, the present invention is not limited to the examples described in the embodiments.
For example, in the embodiment, the central portion of the lower wall portion 31 (see the center line O in FIGS. 3 and 4) has the same height as the lower end of the engine 2, but in the present invention, the central portion of the lower wall portion 31. May be located below the lower end of the engine 2.
Alternatively, the central portion of the lower wall portion 31 may be located slightly above the lower end of the engine 2. In this case, a part of the running wind flowing backward from the apex P of the lower wall portion 31 hits the lower end of the engine 2, but the remaining running wind passes under the engine 2 and hits the rear engine mount 10. The rear engine mount 10 can be cooled.

Further, the guard member 30 of the embodiment is formed with a groove wall portion 55 (right curved wall portion 35 and vertical wall portion 52), but the groove wall portion 55 (right curved wall portion 35 and vertical wall portion 52). May be the guard member 30 in which is not formed.
Further, although the upper end 40a of the partition wall portion 40 of the embodiment is gradually positioned upward, it may be formed so as to be continuously positioned upward.
Further, the opening 8 formed in the engine undercover 5 is open including the transmission, but the opening of the present invention is formed to be at least large enough to open the oil filter element 2a and the engine 2. Just do it.

1 Transmission unit 2 Engine 2a Oil filter element 2b Oil pan 5 Engine undercover 8 Opening 8a Front edge 8b Rear edge 10 Engine mount (rear engine mount, cooling parts)
14 Mount rubber 20 Recess 21 Supply path 30 Guard member 31 Lower wall part 32 Flat wall part 33 Curved wall part 34 Left curved wall part (1st curved wall part)
35 Right curved wall (2nd curved wall)
40 Partition wall 40a Upper end 50 Fixed part 51 L-shaped part 52 Vertical wall part 53 Screws (fixing member)
53a Head 54 Recess 55 Groove wall 100 Vehicle P Apex R Engine room

Claims (7)

It is a vehicle body undercover structure with an engine undercover that covers at least a part of the engine room where the oil filter element, engine and cooling parts are arranged in order from the front.
An opening formed in the engine undercover to open at least the oil filter element and the engine.
A recess formed by denting the front edge of the opening upward,
A space behind the recess, which is a supply path for supplying the running wind introduced from the recess to the engine.
A guard member that covers the oil filter element and
With
The guard member is adjacent to the supply path in the vehicle width direction.
The guard member
A substantially horizontal plate-shaped lower wall portion that covers the lower part of the oil filter element,
A partition wall portion that rises from the end of the lower wall portion and separates the supply path and the oil filter element is provided.
The vehicle body undercover structure is characterized in that the lower wall portion has a curved first curved wall portion that is located upward as it approaches the partition wall portion side. At least a portion of the cooling component is located above the trailing edge of the opening.
The vehicle body undercover structure according to claim 1, wherein the trailing edge portion of the opening is located below the lower end of the engine. The lower wall portion of the guard member includes a substantially flat flat wall portion located on the front side and the first curved wall portion continuous with the rear end of the flat wall portion.
The vehicle body undercover structure according to claim 1 or 2, wherein the partition wall portion of the guard member extends over the flat wall portion and the first curved wall portion. The vehicle body undercover structure according to any one of claims 1 to 3, wherein the end portion of the first curved wall portion on the partition wall portion side is located upward toward the rear. The guard member includes a fixing portion that is continuous with the lower wall portion and is fixed to the edge portion of the opening.
The lower wall portion has a curved second curved wall portion that is located upward as it approaches the fixed portion side.
The fixed portion is characterized by having a vertical wall that extends upward and is continuous with the second curved wall portion and forms a groove wall portion that is recessed upward in cooperation with the second curved wall portion. The vehicle body undercover structure according to any one of claims 1 to 4. In the guard member, the fixing portion is fastened to the head of the fixing member, and the guard member is detachably fixed to the edge portion of the opening.
The vehicle body undercover structure according to claim 5, wherein a recess for accommodating the head is formed in the fixing portion. The vehicle body undercover structure according to any one of claims 1 to 6, wherein the upper end of the partition wall portion of the guard member is located upward toward the rear.

Images