JPH0532130A - Structure of air intake of outer air introducing duct - Google Patents

Abstract

PURPOSE:To prevent hot air from intruding and at the same time enlarge the area of an opening of an outer air introducing duct, in which an air intake is provided facing ahead at the gap between a radiator and hood in particular in the car central part interfering with the radiator cap. CONSTITUTION:At the foremost of an outer air introducing duct 13, an air intake 16 is provided widely opening toward ahead of the car, and a notch 19 is formed in the bottom wall 18 extending ahead from the underedge of the air intake. The oversurface of this air intake 13a is sealed relative to the hood by No.1 sealing member 25. The notch 19 is sealed relative to the radiator 6 by No.2 sealing member 26 at the undersurface.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of an air intake portion of an outside air introduction duct that opens forward of a vehicle in an internal combustion engine for an automobile.

[0002]

2. Description of the Related Art In order to improve the charging efficiency of an internal combustion engine,
Since it is desirable to take in as low temperature outside air as the intake air of the internal combustion engine, in recent automobiles, the outside air introduction duct is not opened in the high temperature engine room,
An air intake structure that is open toward the front of the vehicle at the front of the vehicle is often used. As one of them, for example, as disclosed in Japanese Utility Model Laid-Open No. 63-161030, there is known a structure in which an air intake is opened in a gap between a radiator and a hood.

FIG. 10 shows the structure of this conventional air intake part, in which an outside air introduction duct 33 extends from the air cleaner 31 along the upper rear portion of a radiator 32.
A pair of air intakes 3 is provided at the tip of the vehicle toward the front of the vehicle.
4 is formed with an opening. This pair of air intakes 34
Are independently formed on the left and right sides with the radiator cap 35 sandwiched in the center. The bottom wall 36 of each air intake port 34 is formed to extend forward along the upper surface of the radiator 32 and each air intake port 34 is formed. Side walls 37 are formed on both left and right sides of the inlet 34. The seal member 38 is formed in a substantially U shape from the upper edge of the side wall 37 to the upper edge of the air intake 34.
Are arranged, and when the hood (not shown) is closed, the seal member 38 is pressed against the inner surface of the hood to cover the air intake 34. That is, in the illustrated example, the pair of air intake portions are formed in a duct shape on both sides of the radiator cap 35 independently.

Since the radiator cap 35 must be provided at the highest position of the radiator 32, and the largest gap between the radiator 32 and the hood is provided at the center of the vehicle, the radiator 32 is generally provided at the center. A radiator cap 35 is arranged. On the other hand, the above-mentioned air intake section is inevitably arranged at the center of the vehicle due to the battery, air cleaner, etc. being arranged on the left and right sides of the front part of the engine room, and therefore, as shown in the example in the figure, the air intake section is The radiator cap 35 is liable to interfere with the layout.

[0005]

In the conventional air intake structure as described above, the central radiator cap 3 is used.
Since the duct-like air intake portions are formed on both sides of the air intake portion while avoiding the five portions, the opening area of the air intake opening 34 that is actually open compared to the left and right outer dimensions of the entire air intake portion. Will be quite small. Therefore, due to the vehicle design, it is not possible to secure a sufficient opening area of the air intake port 34 in a recent automobile in which the hood is low and the gap between the radiator 32 and the radiator 32 tends to be small. There was a problem that the output was restricted. Further, if an attempt is made to secure a sufficient opening area, the left and right outer dimensions of the entire air intake section become large, which makes layout with other parts difficult.

[0006]

Therefore, according to the present invention, an air intake opening to the front of the vehicle is provided at the tip of the outside air introducing duct arranged along the upper rear portion of the radiator. The bottom wall of the radiator is extended forward along the upper surface of the radiator, and a side wall extending forward is provided so as to partition both sides of the air intake, and the hood extends from the upper edge of the side wall to the upper edge of the air intake. In an air intake part structure of an outside air introduction duct in which a seal member that is in pressure contact with an inner surface is arranged in a substantially U shape, a substantially rectangular notch in which a radiator cap is arranged is provided in the center of the bottom wall. A seal member for sealing between the radiator and the radiator is disposed on the peripheral edge of the portion.

[0007]

In the above structure, since the air intake port is also opened at the position where the radiator cap is arranged, that is, at the rear of the radiator cap, the opening area of the air intake port is larger than the overall external dimensions.

Further, since the seal member seals between the radiator and the notch peripheral edge where the radiator cap is arranged, hot air from the rear of the radiator is not sucked.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a plan view of the interior of an engine room 1 of an automobile equipped with an air intake structure according to the present invention.

In FIG. 1, the left side of the drawing is the front of the vehicle, strut housings 2 are formed on both left and right sides of an engine room 1, and a V-type internal combustion engine 3 is mounted between the strut housings 2. The air cleaner 4 and the battery 5 are provided on the left and right of the front of the engine room 1, respectively.
The radiator 6 is arranged between the two, that is, in the center of the front surface of the vehicle. This radiator 6 is of a type having tanks at the upper and lower parts, and a radiator cap 7 is arranged at the center of the upper tank.

An intake system of an internal combustion engine includes a pair of collectors 8 located between banks, a surge tank 10 in which these collectors are gathered through an intake passage 9, an air cleaner 4 connected to the surge tank 10 through a rubber duct 11, A resonator 12 connected to the side surface of the air cleaner 4, an outside air introduction duct 13 made of a hard synthetic resin, which extends from the resonator 12 toward the center of the vehicle and is provided along the upper rear of the radiator 6. It is roughly composed. An air flow meter 14 for detecting the amount of intake air is provided at the connection between the air cleaner 4 and the rubber duct 11, and a throttle chamber 15 is provided in each of the pair of intake passages 9 between the surge tank 10 and the collector 8. It is installed.

The tip of the outside air introduction duct 13 is bent toward the front of the vehicle at the center of the radiator 6, that is, at the center of the vehicle, and a relatively wide air intake portion 13a is formed on both sides of the radiator cap 7. Has been done. 2 to 5 show the details of the air intake portion 13a. An air intake port 16 that is open toward the front of the vehicle is formed on a side surface of the flat outside air introduction duct 13 extending in the vehicle width direction on the vehicle front side. Are formed. The air intake port 16 is formed elongated over the entire width of the air intake part 13a, that is, on both sides of the radiator cap 7. In the illustrated example, in order to avoid a decrease in the rigidity of the outside air introduction duct 13 due to the long opening of the air intake port 16, as shown in FIG. 3, a pair of ribs 17 that cross the air intake port 16 are left. Although the air intake 16 is actually divided into three by this, the rib 17 can be removed if there is no problem in ensuring rigidity.

A bottom wall 18 along the lower edge of the air intake 16 is formed so as to extend forward, and its center portion, that is, a portion corresponding to the radiator cap 7, is prevented from interfering with the radiator cap 7. Is provided with a substantially rectangular notch 19. The bottom wall 18 has a shape in which an intermediate portion 18a bulges upward along the upper surface of the radiator 6 (see FIG. 4), and a tip portion 18b is
It extends so as to cover the upper surface of the radiator core support upper 20, which is a support member of the radiator 6, and is screwed to the radiator core support upper 20 at the mounting portion 18c. A seal member 21 is interposed between the radiator core support upper 20 and the radiator 6.

A pair of side walls 22 are formed so as to extend forward from the left and right opening edges of the air intake 16 so as to partition the left and right sides of the air intake 16. This side wall 22
Extends to the tip of the bottom wall 18, but as shown in FIGS. 4 and 5, the hood inner panel 24 that constitutes the hood 23.
It gradually decreases toward the front so as to follow the inner surface shape of the. A flange portion 22a having an appropriate width is formed on the upper edge of the side wall 22.
A first seal member 25 made of an elastic material such as rubber or sponge is provided from a to the upper edge of the air inlet 16 so as to form a substantially U shape when viewed from above.

Further, on the periphery of the cutout portion 19 of the bottom wall 18, more specifically, on the lower surfaces of the three sides of the left and right side edges and the rear end edge, rubber or a U-shaped shape as viewed from above is also used. A second seal member 26 made of an elastic material such as sponge is provided.

The second seal member 26 has the radiator 6 as shown in FIGS. 4 and 5 in a state where the outside air introduction duct 13 is fixed to the radiator core support upper 20.
It is designed to come into pressure contact with the upper tank surface. Further, the first seal member 25 is adapted to come into pressure contact with the inner surface of the hood inner panel 24 when the hood 23 is closed, whereby the three sides except the front of the air intake portion 13a are sealed.

Therefore, in the above structure, the low temperature outside air flowing in from the front of the vehicle flows through the gap between the radiator 6 and the hood 23 as shown by the arrow in FIG.
Is taken into the outside air introduction duct 13. At this time,
The air intake port 16 is also formed behind the radiator cap 7 and is open over the entire width of the air intake part 13a on the left and right, so that it is sufficiently larger than the outside air size of the air intake part 13a. A large opening area can be secured. Further, the outer dimensions of the air intake portion 13a can be made smaller and flatter than the required opening area.

Further, since the notch 19 in which the radiator cap 7 is located is sealed to the radiator 6 by the second seal member 26, the high temperature air after passing through the radiator 6 is not taken in through the notch 19. That is, like the conventional one, only the low temperature air upstream of the radiator 6 is taken into the engine.

Next, FIGS. 6 to 9 show different embodiments of the present invention. In this embodiment, a flexible rectangular rubber sheet is used as the second sealing member 27 that seals the cutout portion 19. The cutout portion 19 is provided on three sides except the front side.
Is glued to the underside of. A circular opening 27a is provided substantially in the center of the sheet-shaped second seal member 27, and the opening 27a is formed on the outer peripheral surface of the cylindrical cap mounting portion 6a on which the radiator cap 7 is mounted. Are tightly fitted. That is, in this embodiment, the cutout portion 19
A sheet-shaped second seal member 27 seals the space between the peripheral edge and the cap attachment portion 6a, so that the inflow of high-temperature air is prevented as in the above-described embodiment.

[0021]

As is apparent from the above description, according to the air intake part structure of the outside air introducing duct according to the present invention, the air intake port is opened even in the portion overlapping with the radiator cap, and the low temperature upstream of the radiator is maintained. Since only the outside air is taken in, it is possible to secure a large opening area of the air intake port as compared with the outer dimensions of the air intake part, and it is possible to improve the engine output. In addition, the external dimensions of the air intake can be made smaller than the required opening area, and the air intake can be flattened especially when the hood is lowered, increasing the degree of freedom in vehicle design and component layout. There is an advantage that.

[Brief description of drawings]

FIG. 1 is a plan view of an entire engine room showing an embodiment of the present invention.

FIG. 2 is a plan view showing an outside air introduction duct of this embodiment.

FIG. 3 is a front view of the outside air introducing duct.

FIG. 4 is a cross-sectional view taken along the line AA of FIG.

5 is a cross-sectional view taken along the line BB of FIG.

FIG. 6 is a plan view of an outside air introducing duct showing a different embodiment of the present invention.

FIG. 7 is a front view of the same.

FIG. 8 is a cross-sectional view taken along the line CC of FIG.

9 is a cross-sectional view taken along the line DD of FIG.

FIG. 10 is a plan view showing an example of a conventional air intake part structure.

[Explanation of symbols]

 6 ... Radiator 7 ... Radiator cap 13 ... Outside air introduction duct 16 ... Air inlet 18 ... Bottom wall 19 ... Notch 22 ... Side wall 25 ... First seal member 26 ... Second seal member 27 ... Second seal member

Claims (1)

Claim: What is claimed is: 1. An air intake opening toward the front of the vehicle is provided at the tip of the outside air introducing duct arranged along the upper rear of the radiator, and the bottom wall of this air intake is formed. , Extending forward along the upper surface of the radiator, and providing a side wall extending forward so as to partition both sides of the air intake, and press-contacting the inner surface of the hood from the upper edge of the side wall to the upper edge of the air intake. In an air intake part structure of an outside air introducing duct in which a seal member is arranged in a substantially U-shape, a substantially rectangular notch in which a radiator cap is arranged is provided at the center of the bottom wall, and a peripheral edge of the notch is provided. An air intake part structure of an outside air introduction duct, characterized in that a seal member for sealing between the radiator and the radiator is provided.