JP2002310022A - Intake air duct - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an instake air duct capable of avoiding infiltration of rainwater into an intake air port even if the intake air duct is exposed to a strong rainfall. SOLUTION: This intake air duct 4 is equipped with a drip channel 9 around the intake air port 7 so as to check infiltration into the intake air port 7 of the rainwater flowing down on a surface of a duct body 8. An inclined face 11 is formed in a top part of the drip channel 9 so that the rainwater immediately flows down to the side of the intake air port 7 from the top part to thereby improve drain performance in the top part of the drip channel 9.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an intake duct.

[0002]

2. Description of the Related Art In general, large-sized transport vehicles such as trucks have more opportunities to travel on unpaved rough roads than ordinary passenger vehicles. It is preferable to take in clean air sufficiently high from the ground instead of nearby air.

[0003] Therefore, in a large transport vehicle, FIG.
As shown in an example, an air intake duct 4 installed on the rear surface of a cab 3 is connected to a air cleaner inlet duct 2 connected to an air cleaner 1 upright through a flexible boot 5, and the air intake duct 4 is connected. Air can be sucked in from an intake port 7 opened toward the loading platform 6 at the upper end of the device.

The details of the intake duct 4 shown in FIG. 4 are shown in FIGS. 5 to 7, and in the example shown here, a duct body 8 extending like a chimney along the rear surface of the cab 3 is shown.
An intake port 7 is opened in a substantially rectangular shape at an upper portion of the air inlet port, and the periphery of the intake port 7 is extended so as to prevent rainwater flowing down the surface of the duct body 8 from entering the intake port 7. A drip channel 9 is mounted.

Here, the drip channel 9 has a base end portion in the direction in which the drip channel 9 projects toward the rear of the vehicle.
The duct body 8 is bent inward as a mating surface 9a along the periphery of the intake port 7, and the mating surface 9a is overlapped with the periphery of the intake port 7 of the duct body 8 and bolted to each other. is there.

The mating surface 9a of the drip channel 9
The periphery of the intake port 7 of the duct body 8 that receives the air is slightly depressed in accordance with the outer shape of the mating surface 9a so that the drip channel 9 can be easily positioned and fastened to the duct body 8 side. It is.

On the other hand, the tip of the drip channel 9 in the projecting direction is formed as a flange 9b bent outwardly in parallel with the mating surface 9a, and serves to block rainwater from flowing into the intake port 7. It is made to carry.

Further, a plurality of louvers 10 are provided at equal intervals in the vertical direction and toward the inside of the duct body 8 as water intrusion prevention means for preventing rainwater from directly falling into the intake port 7. It is designed to be equipped with a slope that forms an upward slope. It is needless to say that this type of louver 10 also has a role of preventing foreign matter from entering.

[0009]

However, in such a conventional intake duct 4, from the viewpoint of ensuring the opening area of the intake port 7 which is opened in a substantially rectangular shape as much as possible, the processing of the intake port 7 is performed. From the viewpoint of ensuring easiness, the top of the drip channel 9 is formed as a substantially horizontal flat surface along the upper side of the intake port 7, so that the top of the drip channel 9 is exposed to heavy rainfall. The rainwater accumulates and overflows to the front of the intake port 7, or the water splashes and scatters to the front of the intake port 7, causing rainwater to accompany the flow of air sucked into the intake port 7. There is a risk of intrusion into the duct body 8.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has as its object to provide an intake duct capable of avoiding rainwater from entering an intake port even when exposed to heavy rainfall.

[0011]

According to the present invention, there is provided an intake duct provided with a drip channel at an outer edge portion of the intake port so as to prevent rainwater flowing down the surface of the duct body from entering the intake port. An inclined surface is formed at the top of the channel so that rainwater can flow from the top to the side of the intake port without delay.

Therefore, in the present invention, since the slope is formed at the top of the drip channel, drainage at the top of the drip channel is remarkably improved by this slope, and rainwater is taken in from the top of the drip channel without delay. Since it will flow down to the side of the mouth, even if it is exposed to heavy rainfall, rainwater will accumulate at the top of the drip channel, overflowing to the front of the intake, and splashing violently Does not occur and scatters in front of the intake port.

Also, since the speed of rainwater flowing on the inclined surface is increased and the rainwater is separated without reattaching to the duct main body at the lowermost part of the inclined surface, the joint between the boot and the air cleaner inlet duct at the lower part of the duct main body. It is also effective in preventing water from entering.

Further, in the present invention, for example, the inclined surface at the top of the drip channel is formed so as to form a downward slope from near the center in the width direction of the intake port toward both the left and right sides, or It can be formed so as to form a downward gradient from one side to the other side.

[0015]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows an example of an embodiment of the present invention, and the parts denoted by the same reference numerals as those in FIGS.

With respect to the intake duct 4 constructed in substantially the same manner as the conventional example shown in FIGS. 5 to 7, in this embodiment, rainwater flows from the top of the drip channel 9 to the side of the intake port 7 without delay. The inclined surface 11 is formed so that it can flow down.

That is, in the example shown here, the inclined surface 11 is formed in a mountain shape having a downward slope from the vicinity of the center in the width direction of the intake port 7 toward the left and right sides, and the rainwater is sucked. It is distributed to the left and right sides of the mouth 7 and flows down.

In this way, the drainage at the top of the drip channel 9 is significantly improved by the inclined surface 11, and the rainwater flows from the top of the drip channel 9 to the side of the intake port 7 without delay. Therefore, even in the case of being exposed to heavy rainfall, rainwater accumulates at the top of the drip channel 9 and overflows to the front of the intake port 7, or a severe splash of water occurs and the intake port No scattering on the front surface of 7 occurs.

Further, since the speed of rainwater flowing on the inclined surface 11 is increased and the rainwater is separated from the lowermost part of the inclined surface 11 without reattaching to the duct body 8, the boot 5 at the lower part of the duct body 8 and the air cleaner are removed. It is also effective for preventing water from entering from the joint of the inlet duct 2 (see FIG. 4).

Therefore, according to the above embodiment, the drainage at the top of the drip channel 9 can be improved by the formation of the inclined surface 11, so that rainwater overflows from the top of the drip channel 9 to the front of the intake port 7. It is possible to prevent currents and splashes, and to prevent rainwater from entering the intake port 7 even when exposed to intense rainfall. The risk of adversely affecting the side can be avoided beforehand.

FIG. 2 shows another embodiment of the present invention.
In this embodiment, the flange 9 of the drip channel 9 is used.
b is formed in a mountain shape corresponding to the shape of the inclined surface 11.

FIG. 3 shows still another embodiment of the present invention. In this embodiment, the slope 11 of the drip channel 9 is inclined downward from one side in the width direction of the intake port 7 to the other side. Is formed.

In each of the embodiments shown in FIGS. 2 and 3, similar to the embodiment shown in FIG.
The drainage at the top of the drip channel 9 can be improved, and the intrusion of rainwater into the intake port 7 during heavy rainfall can be avoided.

It should be noted that the intake duct of the present invention is not limited to the above-described embodiment, and that the water intrusion prevention means provided in the intake port may be constituted by a structure other than a louver. It goes without saying that various changes can be made without departing from the spirit of the present invention.

[0026]

According to the intake duct of the present invention described above,
Since the drainage at the top of the drip channel can be improved by forming the inclined surface, overflow and scattering of rainwater from the top of the drip channel to the front of the intake port can be prevented, and the drip channel is exposed to severe rainfall. However, since it is possible to avoid rainwater from entering the intake port, it is possible to avoid the possibility that rainwater accompanies the air sucked in from the intake port and adversely affects the engine side. It can be effective.

[Brief description of the drawings]

FIG. 1 is a front view illustrating an example of an embodiment of the present invention.

FIG. 2 is a front view showing another embodiment of the present invention.

FIG. 3 is a front view showing still another embodiment of the present invention.

FIG. 4 is a side view showing a conventional example.

FIG. 5 is a front view of the intake duct of FIG. 4;

FIG. 6 is a view in the direction of arrows VI-VI in FIG. 5;

FIG. 7 is a view in the direction of arrows VII-VII in FIG. 5;

[Explanation of symbols]

 4 Inlet duct 7 Inlet 8 Duct body 9 Drip channel 11 Slope

Continued on the front page (72) Inventor Hideki Endo 3-1-1 Hinodai, Hino-shi, Tokyo Inside Hino Motors, Ltd.

Claims (3)

[Claims] 1. An intake duct equipped with a drip channel around the intake port so as to prevent rainwater flowing down the surface of the duct body from entering the intake port. In the intake duct, rainwater flows from the top to the top of the drip channel. An intake duct characterized in that an inclined surface is formed so that it can flow down to the side of the intake port without delay. 2. The inclined surface at the top of the drip channel,
2. The intake duct according to claim 1, wherein the intake duct is formed so as to form a downward gradient from near the center in the width direction of the intake port toward both left and right sides. 3. 3. The slope at the top of the drip channel,
The intake duct according to claim 1, wherein the intake duct is formed so as to form a downward gradient from one side in the width direction of the intake port to the other side.