JP6643766B2 - Automotive bonnet structure - Google Patents

Description

  The present invention relates to a structure of an automobile bonnet having an exhaust port for releasing heat from a heating element such as an automobile engine.

2. Description of the Related Art Conventionally, there is known a hood structure of a passenger car in which overheating of the passenger car is prevented by discharging hot air in an engine room (Patent Document 1). In this apparatus, an opening for discharging hot air in an engine room is provided in a hood, and a cover body provided with a ceiling portion having a space above the opening is formed.
However, in this bonnet structure, since the cover body is provided so as to protrude above the hood, air resistance increases during traveling.

By the way, the structure of a bonnet in a racing car or the like is conventionally as shown in FIGS. Exhaust ports 21 for discharging heat from a heating element such as the engine 20 are provided on the left and right sides of the bonnet 22 to discharge hot air. In FIGS. 12 to 14, the exhaust port 21 and the louver 23 are integrally formed.
In the case of rain, as shown in FIG. 13, rainwater 24 enters the engine room from the exhaust port 21 and causes engine trouble such as wetting the engine 20.
Therefore, in order to prevent rainwater from directly hitting the engine, a water blocking plate 25 is attached below the exhaust port 21 as shown in FIG. When the water impervious plate 25 is attached, the rainwater does not splash directly on the engine 20. However, since the exhaust port 21 is blocked, hot air is trapped in the engine room and cannot be exhausted, thereby causing overheating.

Registered utility model No. 3030868

  Therefore, an object of the present invention is to provide a structure of an automobile bonnet which has a small air resistance during traveling and can discharge hot air from a heating element such as an engine while preventing rainwater intrusion in rainy weather. I do.

In order to solve the above problem, a structure of a hood for an automobile according to claim 1 is configured such that an inner space is formed by joining peripheral edges of a front plate and a back plate to form a back plate immediately above a heating element. A flange portion is formed by protruding upward, an intake port communicating with the internal space is provided in the flange portion, and an exhaust port is formed at a position of a surface plate shifted in the left-right direction with respect to the flange portion , A ceiling is provided on the flange portion, and a branch wall extending in the front-rear direction and projecting downward is provided at a central portion of the ceiling .
The structure of the hood for a vehicle according to the second aspect is such that at least a part of the ceiling is joined to the back surface of the surface plate.
According to a third aspect of the present invention, there is provided an automobile bonnet having a louver provided at an exhaust port.

According to the first aspect of the present invention, the front plate and the back plate are joined at their peripheral edges to form an internal space therein, and the back plate immediately above the heating element is projected upward to form a flange portion. An intake port communicating with the internal space is provided in the flange portion, and an exhaust port is formed at a position of a surface plate shifted in the left-right direction with respect to the flange portion, so that rainwater enters the internal space from the exhaust port. Even so, rainwater does not splash directly on a heating element such as an engine, so that engine trouble due to rainwater does not occur. In addition, hot air in the engine room can be discharged. Also, since the hot air discharging means is housed inside the hood, air resistance during traveling can be reduced.
Further, since the ceiling is provided on the flange portion, rainwater does not enter from the ceiling. Further, the strength of the flange portion is increased. Furthermore, since a dividing wall extending in the front-rear direction and projecting downward is provided at the center of the ceiling, the flow of heat is divided into right and left by the dividing wall and is divided into left and right exhaust ports, so that heat is efficiently exhausted.
According to the invention according to claim 2 , at least a part of the ceiling is joined to the back surface of the surface plate, so that the strength of the bonnet is increased.
According to the third aspect of the present invention, since the louver is provided in the exhaust port, the flow of heat is smooth, and the heat is efficiently exhausted from the exhaust port.

It is a schematic plan view of a motor vehicle. FIG. 4 is a plan view of a bonnet according to an embodiment of the present invention. FIG. 3 is a sectional view taken along line AA of FIG. 2 according to the first embodiment. It is a top view showing a section line of a bonnet part by a 1st example. FIG. 5 is a sectional view taken along line B1-B1 and a sectional view taken along line B2-B2 of FIG. 4 according to the first embodiment. It is a sectional perspective view of a bonnet part by a 1st example. It is sectional perspective view and sectional drawing which show an example of a louver. It is sectional perspective view and sectional drawing which show other examples of a louver. FIG. 5 is an enlarged sectional view corresponding to B2-B2 in FIG. 4 showing a state where a louver is attached. FIG. 4 is a sectional view corresponding to FIG. 3 according to a second embodiment to a fifth embodiment. It is a sectional perspective view of a bonnet part by a 3rd example. It is a top view of the bonnet by a conventional example. It is BB sectional drawing of FIG. FIG. 14 is a cross-sectional view corresponding to FIG. 13 in a state where a water impermeable plate is attached.

Hereinafter, embodiments of the present invention will be specifically described with reference to the drawings. The structure of the hood 1 for a vehicle according to the present invention is such that an inner space 5 is formed inside (between the front plate 2 and the back plate 3) by joining the front plate 2 and the back plate 3 with the peripheral edge 4, and an engine or the like. The rear plate 3 immediately above the heating element 6 is formed to protrude upward to form a flange portion 7, and the flange portion 7 is provided with an intake port 8 communicating with the internal space 5. An exhaust port 9 is formed at the position of the surface plate 2 shifted in the left-right direction with respect to the flange portion 7.
In addition, as a material of the front plate 2 and the back plate 3, fiber reinforced plastic (FRP) is preferable because it is lighter than metal.

  The structure of the flange portion 7 can have various forms. In the first embodiment, a ceiling 10 is provided on a flange portion 7, and the entire ceiling 10 is joined to a surface plate 2. An intake port 8 is provided on a side surface (side wall) of the flange portion 7 to communicate the engine room with the internal space 5. In the first embodiment, since the entire ceiling 10 is joined to the surface plate 2, the strength of the hood 1 is high.

In the second embodiment, a dividing wall 11 extending in the front-rear direction and projecting downward is provided at the center of the ceiling, and the top 10a of the ceiling is joined to the surface plate 2 (FIG. 10A). In the second embodiment, since the heat flow is divided right and left by the distribution wall 11, heat can be efficiently exhausted. Further, since the top 10a of the ceiling is joined to the surface plate 2, the bonnet 1 has high strength as in the first embodiment.

  In the third embodiment, a ceiling is not provided on the flange portion 7, and the entire upper end peripheral portion of the flange portion 7 is an intake port 8 communicating with the internal space 5 (FIG. 10B). In the third embodiment, the air inlet 8 is wide, and heat easily flows into the internal space 5.

  In the fourth embodiment, the ceiling 10 is provided on the flange portion 7 as in the first embodiment. However, the upper surface of the ceiling 10 is not joined to the rear surface of the surface plate 2, and the upper surface of the ceiling 10 is (FIG. 10 (c)).

  In the fifth embodiment, similar to the second embodiment, a dividing wall 11 extending in the front-rear direction and projecting downward is provided at the center of the ceiling 10, but the top 10 a of the ceiling is not joined to the surface plate 2. A gap 12 is provided between the upper surface of the ceiling 10 and the back surface of the surface plate 2 (FIG. 10D). In the fifth embodiment, since the heat flow is diverted to the left and right by the distribution wall 11, heat can be efficiently exhausted as in the second embodiment.

The exhaust port 9 is provided at the position of the surface plate 2 which is shifted rearward in the left-right direction with respect to the above-mentioned flange portion 7.
The exhaust port 9 may be simply provided with a hole in the surface plate 2, but a louver 13 may be attached to the exhaust port 9.
The louver 13 is obtained by assembling a plurality of inclined thin guide plates 14 in parallel with a gap 15 therebetween. As shown in FIG. 7, a flat guide plate 14 a may be provided on the inside, and FIG. As shown, a guide plate 14b having an arc-shaped cross section may be provided on the outside. In order to reduce air resistance during traveling, a louver 13a (FIG. 7) provided with a guide plate 14 inside is preferable because there is no protrusion.
In FIG. 9, the louvers 13 (13 a, 13 b) are separately provided at the exhaust port 9, but the louvers 13 may be formed integrally with the exhaust port 9. As the vehicle travels, a negative pressure is generated in the gap 15 between the guide plates of the louver 13, and the exhaust is efficiently exhausted outward from the gap 15 and the heat is exhausted.

The exhaust port 9 is provided so as to be displaced in the left-right direction and rearward with respect to the flange portion 7, and even if rainwater enters from the exhaust port 9, rainwater may directly fall on the flange portion 7 (the intake port 8). Absent. For this reason, the rainwater does not directly touch the heating element 6 such as an engine, and there is no possibility that engine trouble will occur due to the rainwater.
The rainwater that has entered through the exhaust port 9 flows down inside the back plate 3 and is drained from the drain hole 16 provided in the front part. At this time, since the flange 7 just above the heating element of the back plate 3 is an upwardly projecting flange, the flange 7 serves as a breakwater, and rainwater does not flow directly to the heating element 6. In addition, the drain hole 16 can be provided not only in the front part of a back plate but in a suitable place as needed.

The heat flow from the heating element 6 flows into the internal space 5 from the inlet 8 of the flange portion 7 and is discharged to the outside from the outlet 9. More specifically, a heat flow from a heating element 6 such as an engine flows into a flange portion 7 immediately above the heating element, and flows into an internal space 5 through an intake port 8 formed in the flange portion 7. The heat flow flowing into the internal space 5 flows from the flange portion 7 toward the exhaust port 9 provided at a position shifted in the left-right direction and backward, and is discharged from the exhaust port 9 to the outside.
At this time, if the louvers 13 (13a, 13b) are attached to the exhaust port 9, heat is more efficiently discharged to the outside from the exhaust port 9. If the guide plate 14a is a louver 13a provided inside, there is no outwardly protruding portion, so that air resistance during traveling can be reduced.
In order to attach the separate louvers 13 (13a, 13b) to the exhaust port 9, an appropriate attachment means such as a screw or an adhesive may be used. The attachment may be detachable or non-removable, and is optional.

  According to the structure of the bonnet 1 of the present invention, the means for discharging hot air is housed inside the bonnet 1 and the protrusion outside the bonnet 1 is minimized, so that the air resistance during traveling can be minimized. Further, the weight of the bonnet 1 can be reduced, for example, by using FRP. Therefore, it is suitable as a structure of a hood for a racing car.

DESCRIPTION OF SYMBOLS 1 Bonnet 2 Front plate 3 Back plate 4 Peripheral part 5 Internal space 6 Heating element 7 Flange part 8 Inlet 9 Exhaust 10 Ceiling 10a Ceiling top 11 Dividing wall 12 Gap 13, 13a, 13b Louver 14, 14a, 14b Guide plate 15 gap 16 drain hole

Claims (3)

The front plate and the back plate are joined at their peripheral edges to form an internal space inside, and the back plate immediately above the heating element is projected upward to form a flange portion, and the flange portion communicates with the internal space. An intake port is provided, and an exhaust port is formed at a position of a surface plate shifted in the left-right direction with respect to the flange portion.A ceiling is provided in the flange portion, and a central portion of the ceiling extends in the front-rear direction and extends downward. An automobile bonnet structure comprising a projecting distribution wall .   The vehicle bonnet structure according to claim 1, wherein at least a part of the ceiling is joined to a back surface of the surface plate. The vehicle bonnet structure according to claim 1 or 2, wherein a louver is provided at the exhaust port.

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