Damage prevention structure for intake system

Abstract

To provide a water damage prevention structure for an air intake device that can prevent water from entering the intake port of an air intake duct both when a vehicle is moving forward and backward on a flooded road.SOLUTION: Surrounding walls 31A, 31B are provided at a front end of an intake duct 20 to surround an intake port 21 from below and from an outside in a vehicle width direction, and the surrounding walls 31A, 31B extend forward in a vehicle longitudinal direction further than the intake port 21, extend inward in the vehicle width direction further than a center C of the intake port 21, and extend upward in a vehicle vertical direction further than the center C of the intake port 21. A rear wall 32 is provided at the front end of the intake duct 20, which is in contact with a lower surface of the front end of the intake duct 20 and an outer surface of the front end of the intake duct 20 in the vehicle width direction, and extends in a vertical direction and outward in the vehicle width direction, and the surrounding walls 31A, 31B are continuous with a tip of the rear wall 32 in an extension direction, and extend forward from the tip of the rear wall 32 in the extension direction.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a water-proof structure for an intake device. [Background technology]

[0002] Patent Document 1 discloses an intake port structure for an intake device in a cab-over vehicle, in which the intake port of the intake duct is opened toward the outside of the vehicle body at a position behind the radiator, thereby preventing water from easily entering the intake duct when driving on a flooded road, etc. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 3114002 Summary of the Invention [Problem to be solved by the invention]

[0004] However, in conventional technology, the intake port of the intake duct is located behind the radiator and opens toward the outside of the vehicle body, which makes it possible to prevent water from entering when the vehicle is moving forward, but there is a risk of water entering the intake port when the vehicle is moving backward.

[0005] The present invention has been made with an eye on the above-mentioned problems, and aims to provide a water-prevention structure for an intake device that can prevent water from entering the intake port of the intake duct both when the vehicle is moving forward and when the vehicle is moving backward on a flooded road. [Means for solving the problem]

[0006] The present invention is a water-resistant structure for an intake device comprising a pair of left and right body frames extending in the fore-and-aft direction of the vehicle below the body floor, an engine located on the inside of the body frames in the vehicle width direction and behind the front wheels, and an intake duct extending in the fore-and-aft direction below the body floor and near the outside of the body frames in the vehicle width direction, and taking in air to be sent to the engine, wherein an intake port opening toward the front is formed at the front end of the intake duct, and the intake port is located near the rear of a wall portion that constitutes the outer panel of the vehicle, and wherein a surrounding wall is provided at the front end of the intake duct that surrounds the intake port from below and from the outside in the vehicle width direction, and the surrounding wall extends forward in the fore-and-aft direction of the vehicle further than the intake port, extends inward in the vehicle width direction further than the center of the intake port, and extends upward in the vehicle up-and-down direction further than the center of the intake port. [Effects of the Invention]

[0007] Thus, according to the present invention, a water prevention structure for an intake device can be provided that can prevent water from entering the intake port of the intake duct both when the vehicle is moving forward and when the vehicle is moving backward on a flooded road. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 1 is a right side view of a vehicle equipped with a water damage prevention structure for an intake device according to one embodiment of the present invention. [Figure 2] FIG. 2 is a perspective view of an intake duct equipped with a water damage prevention structure for an intake device according to one embodiment of the present invention. [Figure 3] FIG. 3 is a front view of an intake duct equipped with a water damage prevention structure for an intake device according to one embodiment of the present invention. [Figure 4] FIG. 4 is a plan view of an intake duct equipped with a water damage prevention structure for an intake device according to one embodiment of the present invention. [Figure 5] FIG. 5 is a right side view of an intake duct equipped with a water damage prevention structure for an intake device according to one embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0009] A water-proof structure for an intake device according to one embodiment of the present invention comprises a pair of left and right body frames extending in the fore-and-aft direction of the vehicle below the body floor, an engine located inside the body frame in the vehicle width direction and behind the front wheels, and an intake duct extending in the fore-and-aft direction below the body floor and near the outside of the body frame in the vehicle width direction, which takes in air to be sent to the engine, and an intake port that opens facing forward is formed at the front end of the intake duct, and the intake port is located near the rear of a wall portion that constitutes the outer panel of the vehicle.The water-proof structure for an intake device is characterized in that an enclosing wall is provided at the front end of the intake duct that surrounds the intake port from below and from the outside in the vehicle width direction, and the enclosing wall extends forward in the fore-and-aft direction of the vehicle further than the intake port, extends inward in the vehicle width direction further than the center of the intake port, and extends upward in the vehicle up-and-down direction further than the center of the intake port. As a result, the water prevention structure for an intake device according to one embodiment of the present invention can prevent water from entering the intake port of the intake duct both when the vehicle is moving forward and when the vehicle is moving backward on a flooded road. [Example]

[0010] A water-proof structure for an intake device according to one embodiment of the present invention will be described below with reference to the drawings. Figures 1 to 5 are diagrams showing a water-proof structure for an intake device according to one embodiment of the present invention. In Figures 1 to 5, the directions indicated as up, down, right, and left are directions seen from the driver's seat.

[0011] First, the configuration will be described. In Fig. 1, a vehicle 1 has a cabin 2 arranged above front wheels 4 and a cargo bed 3 arranged above rear wheels 5. A driver's seat where a driver sits is provided in the cabin 2. A vehicle body floor 3A is provided as the floor surface of the cargo bed 3.

[0012] The vehicle 1 has a pair of body frames 6 on the left and right, which extend in the longitudinal direction of the vehicle below the body floor 3A. The body frames 6 also extend in the longitudinal direction of the vehicle from the cabin 2.

[0013] The vehicle 1 is equipped with an engine 10, which is disposed inside the vehicle width direction of the body frame 6 and behind the front wheels 4. The cabin 2 is disposed above the front end of the engine 10. In this manner, the vehicle 1 is configured as a so-called cab-over truck.

[0014] The vehicle 1 is equipped with an intake duct 20 that takes in air to be sent to the engine 10. The intake duct 20 constitutes the intake device of the present invention. The intake duct 20 extends in the front-to-rear direction below the vehicle body floor 3A and near the outer side of the vehicle width direction of the body frame 6. In this embodiment, the intake duct 20 is located near the right side of the right body frame 6. Here, the outer side in the vehicle width direction refers to the side farther from the center in the vehicle width direction. Additionally, the inner side in the vehicle width direction refers to the side closer to the center in the vehicle width direction. The center in the vehicle width direction is the midpoint between the left and right body frames 6. When the intake duct 20 is used as a reference, the outer side in the vehicle width direction is the right side, and the inner side in the vehicle width direction is the left side.

[0015] A connecting hose 20A is connected to the rear end of the intake duct 20. The connecting hose 20A connects the intake duct 20 and the engine 10, and guides the air taken in by the intake duct 20 to the engine 10.

[0016] 2 and 3, an air intake port 21 that opens forward is formed at the front end of air intake duct 20. Air intake port 21 is formed in a rectangular shape when viewed from the front. Air intake port 21 has right end 21A and left end 21C that extend vertically, and upper end 21D and lower end 21B that extend horizontally.

[0017] 4, the air intake 21 is disposed near the rear of a wall 11 that constitutes the outer panel of the vehicle 1. The wall 11 is made of an outer panel that constitutes the rear surface of the cabin 2, for example.

[0018] In this way, because the air intake port 21 is located near the rear of the wall portion 11, when the vehicle is traveling forward on a flooded road, water splashing from the front is blocked by the wall portion 11, preventing the water from entering the air intake port 21. Furthermore, because the air intake port 21 is located below the vehicle body floor 3A, water splashing from above is blocked by the vehicle body floor 3A, preventing the water from entering the air intake port 21. Furthermore, because the air intake port 21 is located near the outer side (right side) of the right body frame 6 in the vehicle width direction, water splashing from the inner side (left side) in the vehicle width direction is blocked by the right body frame 6, preventing the water from entering the air intake port 21. On the other hand, when the vehicle is traveling backward on a flooded road, water splashes toward the air intake port 21 from behind and below, and it is necessary to prevent this water from entering the air intake port 21.

[0019] As shown in Figures 2, 3, 4, and 5, vehicle 1 has an upper bulkhead 30 and a lower bulkhead 40, which block water splashing from the rear and below toward air intake 21.

[0020] The upper partition wall 30 is provided at the front end of the intake duct 20. The upper partition wall 30 has surrounding walls 31A and 31B, and a rear wall 32 that is integral with the surrounding walls 31A and 31B.

[0021] As shown in FIG. 3, surrounding walls 31A and 31B surround air intake 21 from below and from the outer side (right side) in the vehicle width direction. When viewed from the front, surrounding walls 31A and 31B are formed in an L-shape overall. Surrounding wall 31A extends in the up-down direction, and surrounding wall 31B extends in the left-right direction. Surrounding walls 31A and 31B extend forward in the vehicle front-rear direction further than air intake 21, extend inward in the vehicle width direction further than center C of air intake 21, and extend upward in the vehicle up-down direction further than center C of air intake 21. Here, center C of air intake 21 refers to the center of the opening in the up-down and left-right directions when viewed from the front.

[0022] As shown in Figures 2, 3, 4, and 5, the rear wall 32 is disposed so as to contact the outer peripheral surface of the rear side (rear side) of the air intake port 21 at the front end of the air intake duct 20, and is formed in a flat plate shape. The rear wall 32 contacts the lower surface of the front end of the air intake duct 20 and the outer surface (right side surface) of the front end of the air intake duct 20 in the vehicle width direction, and extends up and down and outward in the vehicle width direction. The surrounding walls 31A and 31B are continuous with the leading end of the rear wall 32 in the extension direction and extend forward from the leading end of the rear wall 32 in the extension direction. More specifically, the surrounding wall 31A is continuous with the right end of the rear wall 32 and extends forward, and the surrounding wall 31B is continuous with the lower end of the rear wall 32 and extends forward. The upper partition 30 can be integrally formed by pressing a flat plate so that the portions bent forward from the end of the rear wall 32 become the surrounding walls 31A and 31B. The upper partition 30, which is composed of the surrounding walls 31A and 31B and the rear wall 32, is formed in an L-shape as a whole when viewed from the front.

[0023] The lower partition wall 40 is disposed below the surrounding walls 31A, 31B and covers the intake port 21 and the surrounding walls 31A, 31B from below. The lower partition wall 40 extends from the wall portion 11 rearward of the intake port 21 and the surrounding walls 31A, 31B in the front-rear direction. In addition, the lower partition wall 40 extends outward in the vehicle width direction beyond the outer ends of the surrounding walls 31A, 31B in the vehicle width direction and extends inward beyond the inner ends of the surrounding walls 31A, 31B in the vehicle width direction. In other words, the lower partition 40 not only extends from the wall 11 rearward beyond the intake port 21 and the surrounding walls 31A and 31B, but also extends rightward beyond the right ends of the surrounding walls 31A and 31B and leftward beyond the left ends of the surrounding walls 31A and 31B, so that the surrounding walls 31A and 31B are entirely contained within the area (space) above the lower partition 40, and the lower partition 40 entirely covers the surrounding walls 31A and 31B from below. An attachment portion 41 is provided at the front end of the lower partition 40. The attachment portion 41 extends downward from the front end of the lower partition 40. The lower partition 40 is fixed to the wall 11 at the attachment portion 41.

[0024] The intake duct 20 has a support portion 23, which passes between the surrounding walls 31A, 31B and the lower partition wall 40 and connects the lower portion of the intake duct 20 to the wall portion 11.

[0025] The support portion 23 extends downward from a position at the lower part of the intake duct 20 behind the surrounding walls 31A, 31B and above the lower partition wall 40, and then curves forward to be connected to the wall portion 11.

[0026] An upper edge 23A of the support portion 23 is close to the surrounding walls 31A and 31B, and a lower edge 23B of the support portion 23 is close to the lower partition wall 40.

[0027] A fixing portion 33 extending rearward is integrally provided in the upper partition 30 near the rear end of the surrounding wall 31B and the lower end of the rear wall 32, and this fixing portion 33 is fixed to the upper surface of the support portion 23. Therefore, the upper partition 30 is fixed to the support portion 23 at the fixing portion 33.

[0028] As described above, in this embodiment, surrounding walls 31A and 31B are provided at the front end of the intake duct 20 to surround the intake port 21 from below and from the outside in the vehicle width direction, and the surrounding walls 31A and 31B extend forward in the vehicle fore-and-aft direction further than the intake port 21, extend inward in the vehicle width direction further than the center C of the intake port 21, and extend upward in the vehicle up-and-down direction further than the center C of the intake port 21.

[0029] In this way, surrounding walls 31A and 31B surround air intake 21 from below, and surrounding walls 31A and 31B extend forward in the fore-and-aft direction further than air intake 21. Therefore, when the vehicle is backing up, if water splashes toward air intake 21 from below and rearward, as shown by arrow R in Figure 5, the water is blocked by surrounding walls 31A and 31B, thereby preventing water from entering air intake 21.

[0030] In addition, the surrounding walls 31A and 31B surround the intake port 21 from the outside in the vehicle width direction, and the surrounding walls 31A and 31B extend forward of the intake port 21, thereby preventing water from entering the intake port 21 from the outside in the vehicle width direction when the vehicle is backed up.

[0031] Furthermore, since the surrounding walls 31A and 31B are not completely joined to the wall portion 11, it is possible to prevent water from entering while ensuring a sufficient amount of intake air to the intake port 21.

[0032] Furthermore, since the surrounding walls 31A and 31B extend inward in the vehicle width direction from the center C of the air intake 21 and extend upward from the center C of the air intake 21, the surrounding walls 31A and 31B can sufficiently surround the air intake 21 from below and from the outside in the vehicle width direction, thereby reliably preventing water from entering the air intake 21.

[0033] On the other hand, when the vehicle is moving forward, if water splashes downward and forward toward air intake port 21 as shown by arrow F in Figure 5, the water is blocked by wall portion 11 and surrounding walls 31A, 31B, thereby preventing the water from entering air intake port 21.

[0034] As a result, water can be prevented from entering the intake port 21 of the intake duct 20 both when the vehicle is moving forward and when the vehicle is moving backward on a flooded road.

[0035] In this embodiment, a rear wall 32 is provided at the front end of the intake duct 20. The rear wall 32 is in contact with the underside of the front end of the intake duct 20 and the outer surface of the front end of the intake duct 20 in the vehicle width direction, and extends up and down and outward in the vehicle width direction. The surrounding walls 31A and 31B are continuous with the tip of the rear wall 32 in the extension direction, and extend forward from the tip of the rear wall 32 in the extension direction.

[0036] In this way, by extending rear wall 32 in the vertical direction and outward in the vehicle width direction, when water splashes from below and rearward toward air intake 21 as shown by arrow R in Figure 5 when the vehicle is backing up, the water splashing toward air intake 21 and wall 11 is blocked by rear wall 32, preventing the water from reflecting off wall 11 and entering through air intake 21.

[0037] In this embodiment, a lower partition wall 40 that covers the intake port 21 and the surrounding walls 31A, 31B from below is disposed below the surrounding walls 31A, 31B. The lower partition wall 40 extends from the wall portion 11 rearward of the intake port 21 and the surrounding walls 31A, 31B, and extends outward in the vehicle width direction beyond the outer ends of the surrounding walls 31A, 31B in the vehicle width direction and beyond the inner ends of the surrounding walls 31A, 31B in the vehicle width direction.

[0038] In this way, since the lower partition 40 covers the air intake 21 and the surrounding walls 31A, 31B from below, water splashed from below can be blocked by the lower partition 40 both when the vehicle is moving forward and when the vehicle is moving backward, and water can be reliably prevented from entering the air intake 21.

[0039] Furthermore, since the lower partition 40 extends from the wall portion 11 below the surrounding walls 31A and 31B and rearwards of the air intake port 21, a labyrinth structure can be formed by the lower partition 40 and the surrounding walls 31A and 31B, so that water that splashes above the lower partition 40 can be blocked by the surrounding walls 31A and 31B, and it can be reliably prevented from entering the air intake port 21.

[0040] Furthermore, since the lower partition 40 covers the surrounding walls 31A, 31B from below in both the fore-and-aft direction and the vehicle width direction, the amount of water reaching the surrounding walls 31A, 31B from below can be reduced, and water can be reliably prevented from entering the air intake port 21.

[0041] Furthermore, in this embodiment, intake duct 20 has support portion 23 that passes between surrounding walls 31A, 31B and lower partition wall 40 and connects the lower part of intake duct 20 to wall portion 11. Support portion 23 extends downward from a position at the lower part of intake duct 20 rearward of surrounding walls 31A, 31B and above lower partition wall 40, and then curves forward to connect to wall portion 11. Upper edge 23A of support portion 23 is close to surrounding walls 31A, 31B, and lower edge 23B of support portion 23 is close to lower partition wall 40.

[0042] In this way, since the support portion 23 is close to the surrounding walls 31A, 31B and the lower partition 40, the gap between the surrounding walls 31A, 31B and the lower partition 40 can be blocked by the support portion 23, and water can be prevented from entering the inside of the vehicle width direction through the gap between the surrounding walls 31A, 31B and the lower partition 40 when the vehicle is backing up, and then being reflected off other components and entering the air intake 21.

[0043] The outer end (right end) of the rear wall 32 in the vehicle width direction may be extended further outward (to the right), or the lower end of the rear wall 32 may be extended further downward, which further prevents water from entering the air intake port 21. The rear wall 32 of the upper partition wall 30 may be configured to contact the upper surface of the front end of the air intake duct 20 and the inner surface (left surface) of the front end of the air intake duct 20 in the vehicle width direction. In this case, the portions of the upper partition wall 30 corresponding to the surrounding walls 31A and 31B are also positioned to surround the air intake port 21 from above and from the left. As long as the air intake duct 20 is positioned in a location on the vehicle 1 where water may enter while the vehicle is traveling, the effects of the upper partition wall 30 and the lower partition wall 40 can be expected. The fixing portion 33 of the upper partition wall 30 is positioned below the air intake port 21, which can block water from below. Furthermore, by forming the cross section of upper edge 23A of support part 23 into a T-shape, it is possible to prevent water that hits support part 23 from splashing further upward from T-shaped upper edge 23A. Furthermore, by forming the cross section of lower edge 23B of support part 23 into an inverted T-shape, water that splashes from below can be caught by lower edge 23B and allowed to fall downward.

[0044] While an embodiment of the present invention has been disclosed, it will be apparent to one skilled in the art that modifications may be made thereto without departing from the scope of the present invention, and it is intended that all such modifications and equivalents be included in the following claims. [Explanation of symbols]

[0045] 1 vehicle 3A Body floor 4 front wheels 6 Body frame 10 Engine 11 Wall 20 Intake duct 21 Air intake 23 Support part 23A Upper edge 23B bottom edge 30 Upper bulkhead 31A Siege Wall 32 Rear wall 40 Lower bulkhead C Center of intake

Claims

1. a pair of left and right body frames extending in the front-rear direction of the vehicle below the body floor; an engine disposed inside the body frame in the vehicle width direction and behind the front wheels; an intake duct extending in a front-rear direction below the vehicle body floor and near an outer side of the vehicle width direction of the vehicle body frame, and taking in air to be sent to the engine, An intake port that opens forward is formed at the front end of the intake duct, A water-proof structure for an intake device in which the intake port is disposed near the rear of a wall portion constituting an outer panel of a vehicle, a surrounding wall is provided at a front end of the intake duct to surround the intake port from below and from the outside in the vehicle width direction; A water-preventing structure for an intake device, characterized in that the surrounding wall extends forward in the vehicle's fore-and-aft direction more than the air intake port, extends inward in the vehicle's width direction more than the center of the air intake port, and extends upward in the vehicle's up-and-down direction more than the center of the air intake port.

2. a rear wall is provided at a front end of the intake duct, the rear wall being in contact with a lower surface of the front end of the intake duct and an outer surface of the front end of the intake duct in the vehicle width direction, and extending in the up-down direction and outward in the vehicle width direction; 2. The water prevention structure for an intake device according to claim 1, wherein the surrounding wall is continuous with the tip end of the rear wall in the extension direction and extends forward from the tip end of the rear wall in the extension direction.

3. a lower partition wall is disposed below the surrounding wall to cover the intake port and the surrounding wall from below; A water-proof structure for an intake device as described in claim 1 or claim 2, characterized in that the lower partition extends from the wall portion rearward of the intake port and the surrounding wall, and extends outward in the vehicle width direction beyond the outer end of the surrounding wall in the vehicle width direction, and extends inward beyond the inner end of the surrounding wall in the vehicle width direction.

4. the intake duct has a support portion that passes between the surrounding wall and the lower partition wall and connects a lower portion of the intake duct to the wall portion, the support portion extends downward from a position at the lower part of the intake duct rearward of the surrounding wall and above the lower partition wall, and then curves forward to be connected to the wall portion, 4. The structure for preventing water from getting into an intake system according to claim 3, wherein an upper end edge of the support portion is close to the surrounding wall, and a lower end edge of the support portion is close to the lower partition wall.

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