JP6981125B2 - Intake structure of vehicle intake system - Google Patents

Description

The present invention relates to an intake structure of an intake device for a vehicle.

Conventionally, as a technique for preventing foreign substances such as snow and water from being sucked into an engine, a vehicle intake device described in Patent Document 1 is known.

The vehicle intake device described in Patent Document 1 includes an engine intake port arranged in the vehicle traveling direction and an intake guiding device that bypasses the air flowing in from the vehicle traveling direction and supplies the air to the engine intake port. It is composed. As a result, in Patent Document 1, foreign matter such as snow and water can be introduced to the engine intake port by detouring the air flowing in from the traveling direction of the vehicle without directly sucking it into the engine intake port. Can be prevented from flowing into.

Japanese Unexamined Patent Publication No. 2005-121019

However, in the conventional technique described in Patent Document 1, the intake port is open toward the side surface of the vehicle. For this reason, when foreign matter wound up from the road surface flies from the side surface to the intake port when traveling on a rough road, the foreign matter flying from the side surface direction cannot be circumvented and the foreign matter directly invades the intake port. There was a risk that the engine performance would be reduced.

The present invention has been made by paying attention to the above circumstances, and can prevent foreign matter from entering the intake inlet not only in the vehicle traveling direction but also in the foreign matter flying from the vehicle width direction. It is an object of the present invention to provide an intake structure of an intake device for a vehicle capable of improving engine performance.

The present invention comprises a front grill located at the front end of the vehicle so as to form an engine room in the front of the vehicle and having a grill opening for introducing running air into the engine room, behind the front grill. An arranged radiator, a fan shroud arranged on the rear surface of the radiator and accommodating a cooling fan, an engine arranged behind the fan shroud and having an air cleaner at the upper part, and between the fan shroud and the air cleaner. The intake duct arranged and supplying the air taken in from the engine room to the air cleaner is the intake structure of the vehicle intake device accommodated in the engine room, and the intake duct extends in the vehicle width direction. An intake inlet for taking in air from the engine room opens at one end of the intake duct in the vehicle width direction toward the one end side in the vehicle width direction, and at the other end of the intake duct in the vehicle width direction. An intake outlet connected to an air cleaner is formed, and a first shield wall arranged in front of the intake inlet and a first shield wall rearward from one end in the vehicle width direction of the intake duct at one end in the vehicle width direction. A second shield wall facing the vehicle width direction is provided at the intake inlet, and the first shield wall and the second shield wall are behind the first shield wall and the second shield. An air introduction space through which air taken into the intake inlet passes is formed between the wall and the intake inlet, and the intake inlet is a front view of the vehicle from the front, and the radiator and the fan shroud. The lower end of the intake inlet is arranged at a position that does not overlap with the upper region of the grill opening in a front view of the vehicle from the front, and the intake duct is arranged so that the intake inlet has the intake inlet. is bent to be positioned further forward than the intake outlet, the so air from below the air introduction space is introduced, the lower end portion of the first shield wall a Rukoto disposed forward of the upper portion It is a feature.

As described above, according to the present invention described above, it is possible to prevent foreign matter from entering the intake inlet not only in the vehicle traveling direction but also in foreign matter flying from the vehicle width direction, and it is possible to improve engine performance. ..

FIG. 1 is a plan view of a front portion of a vehicle provided with an intake structure of an intake device for a vehicle according to an embodiment of the present invention. FIG. 2 is a view of the front part of the vehicle provided with the intake structure of the vehicle intake device according to the embodiment of the present invention as viewed from the left side. FIG. 3 is a front view of a vehicle provided with an intake structure of an intake device for a vehicle according to an embodiment of the present invention. FIG. 4 is a front view of a vehicle provided with an intake structure of an intake device for a vehicle according to an embodiment of the present invention, and shows a state in which a radiator grill or the like is removed. FIG. 5 is a plan view of an intake duct in a vehicle provided with an intake structure of an intake device for a vehicle according to an embodiment of the present invention. FIG. 6 is a bottom view of an intake duct in a vehicle provided with an intake structure of an intake device for a vehicle according to an embodiment of the present invention. FIG. 7 is a cross-sectional view taken along the line VII-VII of FIG. FIG. 8 is a view of an intake duct viewed from the left side in a vehicle provided with an intake structure of an intake device for a vehicle according to an embodiment of the present invention. FIG. 9 is a cross-sectional view taken along the line in the IX-IX direction of FIG.

The intake structure of the vehicle intake device according to the embodiment of the present invention is arranged at the front end of the vehicle so as to form an engine room at the front of the vehicle, and has a grill opening for introducing running air into the engine room. A radiator with a front grill, located behind the front grill, a fan shroud located behind the radiator to house the cooling fan, an engine located behind the fan shroud, with an air cleaner at the top, and a fan. The intake duct, which is located between the shroud and the air cleaner and supplies the air taken in from the engine room to the air cleaner, is the intake structure of the vehicle intake device housed in the engine room, and the intake duct is in the vehicle width direction. It stretched, in the vehicle width direction end portion of the intake duct, open air inlet for taking air from the engine room toward the vehicle width direction end portion side in the vehicle width direction end portion of the intake duct, the air cleaner An intake outlet to be connected is formed, and at one end of the intake duct in the vehicle width direction, a first shielding wall arranged in front of the intake inlet and an intake inlet extending rearward from one end of the first shielding wall in the vehicle width direction. A second shield wall facing the vehicle width direction is provided in the vehicle, and the first shield wall and the second shield wall provide intake air behind the first shield wall and between the second shield wall and the intake inlet. It is characterized in that an air introduction space through which air taken in is passed is formed at the inlet. Thereby, the intake structure of the vehicle intake device according to the embodiment of the present invention prevents the foreign matter from entering the intake inlet not only in the vehicle traveling direction but also in the foreign matter flying from the vehicle width direction. It can improve the engine performance.

Hereinafter, the intake structure of the intake device for a vehicle according to an embodiment of the present invention will be described with reference to the drawings.

1 to 9 are views showing an intake structure of an intake device for a vehicle according to an embodiment of the present invention. In FIGS. 1 to 9, in the up / down / front / rear / left / right directions, the width direction of the vehicle is the left / right direction and the height direction of the vehicle is the up / down direction when the traveling direction of the vehicle is the front and the backward direction is the rear.

First, the configuration will be described. In FIG. 1, the vehicle 1 includes a body portion 3. The body portion 3 includes a side fender 10 and a front wheel house 12. In FIG. 1, the left side fender 10 and the front wheel house 12 are shown, but the side fender 10 and the front wheel house 12 are provided in pairs on the left and right sides.

The side fender 10 extends in the vertical direction of the vehicle 1 and extends in the front-rear direction. The front wheel house 12 extends inward in the vehicle width direction from the side fender 10. A front wheel (not shown) is provided below the front wheel house 12, and the front wheel house 12 secures a space for the front wheel to rotate above the front wheel.

A front grill 60 is provided at the front end of the vehicle 1, and the front grill 60 has a grill opening 60A.

Further, an engine room 21 surrounded by a front grill 60, a side fender 10, a front wheel house 12, and the like is formed in the front portion of the vehicle 1. The engine 22 is installed in the engine room 21.

A running wind is introduced into the engine room 21 through the grill opening 60A of the front grill 60. Here, the traveling wind is an air flow generated by the traveling of the vehicle 1 and the air thereof.

In any of FIGS. 1 to 4, the engine 22 includes a cylinder block 23, a cylinder head 24, a cylinder head cover 25, and an oil pan 26. The cylinder block 23, the cylinder head 24, the cylinder head cover 25, and the oil pan 26 of this embodiment constitute an engine body 22A.

The cylinder block 23 is provided with a plurality of cylinders (not shown). A piston (not shown) is housed in the cylinder, and the piston reciprocates in the vertical direction with respect to the cylinder. The piston is connected to a crankshaft (not shown) via a connecting rod (not shown), and the reciprocating motion of the piston is converted into the rotational motion of the crankshaft via the connecting rod. The engine 22 is arranged vertically in the engine room 21 so that a plurality of cylinders are aligned in the front-rear direction of the vehicle 1.

The cylinder head 24 is provided with a plurality of intake ports (not shown), a plurality of intake valves for opening and closing the intake ports, a plurality of exhaust ports, and a plurality of exhaust ports for opening and closing the exhaust ports.

An intake manifold 27 is provided on the right side surface of the cylinder head 24, and an exhaust manifold 28 is provided on the left side surface of the cylinder head 24.

The intake manifold 27 introduces intake air into the cylinder through the intake port. The exhaust manifold 28 is integrally formed with the cylinder head 24, and the exhaust gas burned in the cylinder is discharged to the exhaust manifold 28 through the exhaust port.

A valve chamber (not shown) is formed between the cylinder head 24 and the cylinder head cover 25, and an intake camshaft having an intake cam (not shown) and an exhaust camshaft having an exhaust cam are installed in the valve chamber, respectively. ing.

The intake cam and the exhaust cam open and close the intake port and the exhaust port, respectively, by driving the intake valve and the exhaust valve as the intake camshaft and the exhaust camshaft rotate.

An air cleaner 29 is provided on the upper part of the cylinder head cover 25. An intake duct 30 is connected to the upstream side of the air cleaner 29. The intake duct 30 has an air cleaner inlet pipe portion 31 between the air cleaner and the air cleaner 29, and is connected to the air cleaner 29 via the air cleaner inlet pipe portion 31.

The intake duct 30 takes in the air taken into the engine room 21 and then introduces it into the air cleaner 29. The air cleaner 29 purifies the air introduced from the intake duct 30.

An air cleaner outlet hose 37 is connected to the downstream side of the air cleaner 29. Here, upstream and downstream mean upstream and downstream with respect to the direction of air flow.

The downstream end of the air cleaner outlet hose 37 is connected to the turbocharger 32 via a turbo inlet pipe (not shown). The turbocharger 32 is attached to the left side surface of the cylinder block 23 in the vehicle width direction, and has a compressor housing 32A and a turbine housing 32B.

A compressor wheel (not shown) is rotatably provided in the compressor housing 32A, and the downstream end of the turbo inlet pipe is connected to the compressor housing 32A.

The downstream end of the exhaust pipe 41 is connected to the turbine housing 32B. A turbine wheel (not shown) is rotatably provided in the turbine housing 32B, and the turbine wheel rotates integrally with the compressor wheel.

The upstream end of the exhaust pipe 41 is connected to the cylinder head 24, the exhaust gas is discharged to the exhaust pipe 41 through the exhaust manifold 28, and the exhaust gas discharged to the exhaust pipe 41 is introduced into the turbine housing 32B. ..

The turbocharger 32 pressurizes the intake air supplied to the compressor housing 32A by rotating the turbo wheel by the exhaust pressure and rotating the compressor wheel as the turbine wheel rotates.

The intake air pressurized by the compressor housing 32A passes through an intercooler and a throttle body (not shown), and then is introduced into the engine body 22A via the intake manifold 27.

In the engine room 21, a radiator 42 is arranged behind the front grill 60. The radiator 42 is connected to the engine 22 via a cooling water pipe (not shown), and exchanges heat with the engine 22 between the cooling water flowing through the cooling water pipe and the outside air.

As a result, the low-temperature cooling water flowing out of the radiator 42 is supplied to the engine 22, and the engine 22 is cooled by the low-temperature cooling water. The high-temperature cooling water that has exchanged heat with the engine 22 flows into the radiator 42 from the cooling water pipe and is cooled by the radiator 42.

A fan shroud 42A for accommodating a cooling fan (not shown) is arranged on the rear surface of the radiator 42. Behind the fan shroud 42A, an engine 22 having an air cleaner 29 at the upper part is arranged.

A cylindrical intake duct 30 is arranged between the fan shroud 42A and the air cleaner 29, and the intake duct 30 supplies the air taken in from the engine room 21 to the air cleaner 29.

In FIGS. 1, 2, and 4, the intake duct 30 extends in the vehicle width direction. At one end (left end) of the intake duct 30 in the vehicle width direction, a circular intake inlet 30A that takes in air from the engine room 21 is open toward one end side (left) in the vehicle width direction. In this embodiment, the intake duct 30 is open facing the left front wheel house 12.

An intake outlet 30B connected to the air cleaner 29 is formed at the other end (right end) of the intake duct 30 in the vehicle width direction. Therefore, the intake duct 30 is taken into the engine room 21 through the grill opening 60A of the front grill 60, air flowing backward in the engine room 21 is introduced from the intake inlet 30A, and the air cleaner 29 is introduced from the intake outlet 30B. Supply to.

In this way, since the intake inlet 30A of the intake duct 30 is open toward the left, which is one end side in the vehicle width direction, the foreign matter that flows backward together with the air in the engine room 21 is the foreign matter. It is possible to prevent the intrusion into the intake inlet 30A. That is, it is possible to prevent the foreign matter from entering the intake inlet 30A against the foreign matter flying from the vehicle traveling direction. As a result, clogging of the air cleaner 20 can be suppressed, and engine performance can be improved.

Here, the foreign matter existing in the engine room 21 includes not only the foreign matter flowing backward on the running wind but also the foreign matter flying from the vehicle width direction toward the intake inlet 30A without riding on the running wind. There is. Therefore, it is desirable to be able to prevent foreign matter from entering the intake inlet not only for foreign matter flying from the vehicle traveling direction but also for foreign matter flying from the vehicle width direction.

Therefore, in the present embodiment, a first shielding wall 71 and a second shielding wall 72 are provided at one end of the intake duct 30 in the vehicle width direction in order to prevent foreign matter from entering the intake inlet 30A. .. The first shielding wall 71 is arranged in front of the intake inlet 30A. The second shielding wall 72 extends rearward from one end of the first shielding wall 71 in the vehicle width direction and faces the intake inlet 30A in the vehicle width direction.

Air introduction through which air taken into the intake inlet 30A passes behind the first shielding wall 71 and between the second shielding wall 72 and the intake inlet 30A by the first shielding wall 71 and the second shielding wall 72. Space 70 is formed.

More specifically, the first shielding wall 71 is formed in a semi-cylindrical shape so as to extend the front half of the one end portion in the vehicle width direction of the intake duct 30 toward the one end portion side in the vehicle width direction, immediately after the intake inlet 30A. It covers the front side of the air introduction space 70, which is the space on the left side.

Further, the second shielding wall 72 faces the intake inlet 30A across the air introduction space 70 on the one end side (left side) of the intake inlet 30A in the vehicle width direction. The overall shape of the second shielding wall 72 is set to be a disk shape having a shape and area substantially equal to the opening shape and opening area of the intake inlet 30A.

In other words, the first shield wall 71 and the second shield wall 72 have a structure like a lid that blocks foreign matter from the front and the side while securing the air introduction space 70 immediately to the left of the intake inlet 30A. is doing.

Since the front of the air introduction space 70 is shielded by the first shielding wall 71 and the left side of the air introduction space 70 is shielded by the second shielding wall 72, the air introduction space 70 is open to the rear. As will be described later, the air introduction space 70 is greatly opened downward by notching the lower part of the first shielding wall 71.

In FIGS. 3 and 4, the intake inlet 30A is arranged at a position not overlapping the radiator 42 and the fan shroud 42A in the front view of the vehicle 1 as viewed from the front.

The lower end of the intake inlet 30A is arranged at a position overlapping the upper region of the grill opening 60A in a front view of the vehicle 1 as viewed from the front. Here, as described above, the intake inlet 30A is provided with the first shielding wall 71, and since the intake inlet 30A is open toward the left, the intake inlet 30A itself is the grill opening from the front. It is not directly visible through the 60A.

Therefore, when the grill opening 60A is viewed from the front of the vehicle 1, the lower end portion of the left end portion of the intake duct 30 having the lower end portion of the intake inlet 30A can be visually recognized in the upper region of the grill opening 60A. The intake inlet 30A is arranged.

In FIGS. 5 and 6, the intake duct 30 is bent so that the intake inlet 30A is located in front of the intake outlet 30B. In other words, the intake duct 30 is bent so that the intake inlet 30A approaches the fan shroud 42A in the front-rear direction.

In FIGS. 5, 6 and 7, the upper end portion 71A of the first shielding wall 71 is arranged at the position of the apex of the circular shape of the first shielding wall 71. Further, the lower end portion 71B of the first shielding wall 71 is arranged in front of the upper end portion 71A so that air is introduced into the air introduction space 70 from below.

In other words, in the present embodiment, the first shielding wall 71 is not formed in a vertically symmetrical shape, but the lower portion of the first shielding wall 71 is cut out to provide the notch portion 71C (see FIGS. 7 and 8). Therefore, the air introduction space 70 is largely opened downward. Note that FIG. 8 shows the position of the cutout portion 71C of the second shielding wall 72.

In FIGS. 5, 6, 7, 8, and 9, the second shielding wall 72 has a flat inclined portion 72A, a flat horizontal portion 72B, and a bent portion 72C.

The inclined portion 72A is continuous with one end of the first shielding wall 71 in the vehicle width direction, and is inclined so as to be separated from the intake inlet 30A as it extends rearward. In other words, the inclined portion 72A is inclined so as to approach the outside in the vehicle width direction as it extends rearward.

The horizontal portion 72B is continuous with the rear end portion of the inclined portion 72A and extends rearward while maintaining an equidistant distance from the intake inlet 30A. In other words, the horizontal portion 72B extends in the front-rear direction of the vehicle 1 without being inclined.

The bent portion 72C is a portion connecting the inclined portion 72A and the horizontal portion 72B. That is, the intersection of the plane forming the inclined portion 72A and the plane forming the horizontal portion 72B constitutes the bent portion 72C. The bent portion 72C is arranged behind the lower end portion 71B of the first shielding wall 71.

The intake duct 30 has a resonator 80 arranged close to the intake inlet 30A, and the resonator 80 projects rearward from the rear end portion of the intake duct 30. The resonator 80 extends rearward from the rear end of the second shielding wall 72.

The resonator 80 is composed of a plurality of cylindrical cylindrical portions 81 extending in parallel with each other toward the rear. The plurality of cylindrical cylindrical portions 81 are connected to each other on the side surfaces. At the rear end of the resonator 80, a connecting portion 85 for connecting a plurality of cylindrical portions 81 is provided.

The resonator 80 is supported by the engine 22 via the connecting portion 85. Therefore, the intake duct 30 is supported by the engine 22 by the connecting portion 85 of the resonator 80.

The resonator 80 generates air column resonance (Helmholtz resonance) in a plurality of cylindrical portions 81 so as to reduce intake noise in the intake duct 30. The plurality of cylindrical portions 81 are set to lengths in the axial direction corresponding to the frequency of the intake noise to be reduced.

In FIGS. 1, 2, and 4, a reserve tank 61 for storing cooling water is arranged at the left end of the rear surface of the fan shroud 42A. The reserve tank 61 extends in the vertical direction at the left end of the rear surface of the fan shroud 42A. Further, the reserve tank 61 is curved along the outer peripheral surface on the left side of the fan shroud 42A on the surface on the right side of the fan shroud 42A.

The reserve tank 61 has a first bulging portion 61A that bulges to the left from the left end portion of the radiator 42 in the front view shown in FIG. In other words, in the front view of the vehicle 1, the first bulging portion 61A of the reserve tank 61 is exposed to the left from the left end portion of the radiator 42, but the remaining portion of the reserve tank 61 is hidden behind the radiator 42. ing.

In FIG. 2, the reserve tank 61 has a second bulging portion 61B that bulges rearward when the vehicle 1 is viewed from the side. The rear end portion of the second bulging portion 61B is located below the lower end portion 71B of the first shielding wall 71.

Next, the action will be described. As shown by arrows A1 and A2 in FIGS. 1 and 2, a traveling wind is taken into the engine room 21 of the traveling vehicle 1 through the grill opening 60A of the front grill 60, and foreign matter is taken into the traveling wind. It is included.

Further, when the vehicle 1 is traveling on a rough road or the like, foreign matter wound up from the road surface flows into the engine room 21 from below, and the foreign matter heads toward the intake inlet 30A of the intake duct 30 as shown by an arrow B1 in FIG. It may fly from the one end direction (left side) in the vehicle width direction.

In the present embodiment, the intake duct 30 extends in the vehicle width direction, and an intake inlet 30A for taking in air from the inside of the engine room 21 opens at one end in the vehicle width direction of the intake duct 30 toward one end in the vehicle width direction. is doing.

Further, at one end of the intake duct 30 in the vehicle width direction, a first shielding wall 71 arranged in front of the intake inlet 30A and a vehicle extending rearward from one end of the first shielding wall 71 in the vehicle width direction to the intake inlet 30A. A second shielding wall 72 facing in the width direction is provided.

Then, the air taken into the intake inlet 30A passes behind the first shielding wall 71 and between the second shielding wall 72 and the intake inlet 30A by the first shielding wall 71 and the second shielding wall 72. The air introduction space 70 is formed.

As a result, foreign matter heading toward the intake inlet 30A in the directions of the arrows A1 and B1 can be collided with the first shielding wall 71 and the second shielding wall 72 to block the foreign matter, and the foreign matter can be prevented from flowing into the intake inlet 30A.

Specifically, in this embodiment, as shown by the arrow A1, foreign matter flying from the front together with the traveling wind can be blocked by the first shielding wall 71. Further, among the foreign substances that have flowed into the engine room 21 from below due to winding up from the road surface or the like, the foreign substances that fly from the vehicle width direction toward the intake inlet 30A as shown by the arrow B1 can be blocked by the second shielding wall 72.

Therefore, it is possible to prevent air containing foreign matter from flowing into the intake inlet 30A. Further, among the air taken into the engine room 21, the air containing no foreign matter while bypassing the first shielding wall 71 and the second shielding wall 72 can be taken in from the intake inlet 30A through the air introduction space 70. can. Therefore, only air can be sent to the air cleaner 29, and the engine performance can be improved.

As a result, it is possible to prevent the foreign matter from entering the intake inlet 30A not only in the vehicle traveling direction but also in the foreign matter flying from the vehicle width direction, and the engine performance can be improved.

Further, in the present embodiment, the intake inlet 30A is arranged at a position not overlapping the radiator 42 and the fan shroud 42A when the vehicle 1 is viewed from the front, and the lower end portion of the intake inlet 30A is the vehicle 1. It is arranged at a position overlapping the upper region of the grill opening 60A when viewed from the front.

As a result, the specific gravity of the foreign matter and the air when the foreign matter flows into the engine room 21 from the front grille 60 together with the traveling wind, as compared with the case where the intake inlet 30A is arranged at a position overlapping the lower region of the front grille 60. The difference can be used to facilitate the removal of foreign matter from the air.

That is, the air having a relatively light specific density flows horizontally to the rear, while the foreign matter having a relatively heavy specific gravity flows to the rear while falling due to gravity. Therefore, it is possible to prevent foreign matter from reaching the intake inlet 30A, and it becomes difficult for foreign matter to enter from below the intake inlet 30A. Therefore, only air can be sent to the air cleaner 29, and the engine performance can be improved.

Further, since the intake inlet 30A is arranged at a position not overlapping the radiator 42 and the fan shroud 42A, it is possible to prevent the warm traveling wind discharged rearward from the radiator 42 by the fan shroud 42A from being sucked into the intake inlet 30A.

Further, the intake duct 30 is bent so that the intake inlet 30A is located in front of the intake outlet 30B. As a result, it is possible to prevent the intake inlet 30A from sucking in the warm traveling wind that has been discharged rearward from the radiator 42 and then diffused in the vehicle width direction.

Further, since the space between the intake duct 30 and the radiator 42 can be secured before and after, the flow of the traveling wind passing through the radiator 42 is not obstructed by the intake duct 30, and the traveling wind in the engine room 21 is not obstructed. It is possible to prevent the flow velocity from decreasing. Therefore, a large amount of fresh running wind can be introduced into the engine room 21, and the engine performance can be improved.

Here, by arranging the lower end portion of the intake inlet 30A at a position overlapping the upper region of the grill opening 60A, the traveling wind introduced from the grill opening 60A into the engine room 21 is provided at the intake inlet 30A. It will flow backward through the underside of the shielding wall 71.

Therefore, in this embodiment, the lower end portion 71B of the first shielding wall 71 is arranged in front of the upper end portion 71A so that air is introduced into the air introduction space 70 from below. As a result, the air introduction space 70 is greatly opened downward.

Therefore, the air introduced into the engine room 21 from the grill opening 60A can be introduced into the air introduction space 70 from below and taken into the intake inlet 30A.

Further, it is possible to prevent the flow of air introduced from the grill opening 60A into the engine room 21 from being obstructed by the first shielding wall 71. Further, among the air introduced into the engine room 21, the air not introduced into the air introduction space 70 can be smoothly flowed backward.

Therefore, more fresh running wind can be introduced into the engine room 21, and the engine performance can be improved.

Further, as shown by arrow A3 in FIGS. 5, 6, 7, and 8, air is introduced into the air introduction space 70 from below, so that the air after the foreign matter is separated due to the difference in specific gravity is introduced into the air. The air can be taken in from the intake inlet 30A through the space 70, and the engine performance can be improved.

Further, in the present embodiment, the second shielding wall 72 is a flat inclined portion 72A that is continuous with one end in the vehicle width direction of the first shielding wall 71 and is inclined so as to be separated from the intake inlet 30A as it extends rearward. Has.

The second shielding wall 72 has a flat horizontal portion 72B that is continuous with the rear end portion of the inclined portion 72A and extends rearward while maintaining an equidistant distance from the intake inlet 30A. The second shielding wall 72 has a bent portion 72C that connects the inclined portion 72A and the horizontal portion 72B. Further, the bent portion 72C is arranged behind the lower end portion 71B of the first shielding wall 71.

As a result, by arranging the bent portion 72C behind the lower end portion 71B of the first shielding wall 71, the reinforcing effect of the bent portion 72C can be exerted on the entire second shielding wall 72, and the horizontal portion. The length of 72B in the front-rear direction can be shortened. Therefore, it is possible to suppress the horizontal portion 72B from vibrating or deforming. Therefore, it is possible to suppress the shape of the air introduction space 70 from being significantly deformed, and it is possible to keep the volume of the air introduction space 70 wide.

Therefore, the effect that a large amount of fresh running wind can be sucked into the intake inlet 30A through the air introduction space 70 can be stably maintained, and the engine performance can be improved.

Further, in the present embodiment, the intake duct 30 has a resonator 80 that is arranged close to the intake inlet 30A and projects rearward from the rear end portion of the intake duct 30, and the resonator 80 is behind the second shielding wall 72. It extends backward from the end.

As a result, when the foreign matter collides with the upper surface and the front surface of the engine 22 and jumps up, and as shown by the arrow B3 in FIG. Can be blocked.

That is, since the resonator 80 acts as a shielding wall for foreign matter, it is possible to prevent foreign matter from entering the intake inlet 30A. Therefore, only air can be sent to the air cleaner 29, and the engine performance can be improved.

Further, some of the traveling winds flowing along the second shielding wall 72 are separated from the rear end portion of the second shielding wall 72 as shown by arrows A4 in FIGS. 5, 6, and 8. Later, it wraps around behind the air introduction space 70 and flows toward the side surface of the resonator 80.

Then, the traveling wind flowing to the resonator 80 side collides with the side wall of the resonator 80 and the flow velocity decreases, so that the air having the reduced flow velocity can be easily sucked into the intake inlet 30A through the air introduction space 70.

Further, in this embodiment, the resonator 80 is composed of a plurality of cylindrical cylindrical portions 81 extending in parallel with each other toward the rear. Then, a connecting portion 85 for connecting a plurality of cylindrical portions 81 was provided at the rear end portion of the resonator 80, and the resonator 80 was supported by the engine 22 via the connecting portion 85.

As a result, the resonator 80 can block foreign matter that collides with the upper surface and the front surface of the engine 22 and jumps up. Further, the groove between the connected cylindrical portions 81 can be guided to eliminate the foreign matter to the rear, and the foreign matter can be prevented from moving on the upper surface of the cylindrical portion 81 in the vehicle width direction and entering the intake inlet 30A. .. Therefore, only air can be sent to the air cleaner 29, and the engine performance can be improved.

Further, since the intake duct 30 and the resonator 80 are supported by the engine 22 via the connecting portion 85, it is possible to suppress the vibration of the resonator 80 and the intake duct 30. Therefore, it is possible to prevent the intake inlet 30A and the air introduction space 70 from being significantly displaced when a foreign substance such as water collides with the resonator 80.

Therefore, a required amount of air can be stably introduced into the engine 22 via the air introduction space 70 and the intake inlet 30A.

Further, in the present embodiment, a reserve tank 61 for storing cooling water is arranged at the left end of the rear surface of the fan shroud 42A, and the reserve tank 61 bulges to the left from the left end of the radiator 42 in front view. It has a bulge 61A.

As a result, as shown by the arrow A2 in FIG. 1, when the traveling wind containing the foreign matter passes to the left of the left end portion of the radiator 42 and flows toward the intake inlet 30A, the first bulging portion 61A becomes the foreign matter. It functions as a shielding wall, and foreign matter can be blocked by the first bulging portion 61A.

Therefore, it is possible to prevent foreign matter from entering the intake inlet 30A, and it is possible to improve engine performance.

Further, in the present embodiment, the reserve tank 61 has a second bulging portion 61B that bulges rearward when the vehicle 1 is viewed from the side, and the rear end portion of the second bulging portion 61B is a second. 1 Located below the lower end 71B of the shielding wall 71.

As a result, when the foreign matter bounced off the road surface flies upward and backward toward the intake inlet 30A as shown by the arrow B2 in FIG. 2, the second bulging portion 61B functions as a shielding wall for the foreign matter. However, foreign matter can be shielded by the second bulging portion 61B.

Therefore, it is possible to prevent foreign matter from entering the intake inlet 30A, and it is possible to improve engine performance.

Although embodiments of the present invention have been disclosed, it will be apparent to those skilled in the art that modifications may be made without departing from the scope of the invention. All such modifications and equivalents are intended to be included in the following claims. The opening direction of the intake inlet 30A is not limited to the vehicle width direction, but may be the vehicle front-rear direction. Further, a plate-shaped member may be added to the rear surface of the intake duct 30 instead of the resonator 80.

1 ... vehicle, 21 ... engine room, 22 ... engine, 29 ... air cleaner, 30 ... intake duct, 30A ... intake inlet, 30B ... intake outlet, 42 ... Radiator, 42A ... Fan shroud, 60 ... Front grill, 60A ... Grill opening, 61 ... Reserve tank, 61A ... 1st bulge, 61B ... 2nd bulge , 70 ... Air introduction space, 71 ... 1st shield wall, 71A ... upper end, 71B ... lower end, 72 ... second shield wall, 72A ... inclined part, 72B. .. Horizontal part, 72C ... Bending part, 80 ... Resonator, 81 ... Cylindrical part, 85 ... Connecting part

Claims (7)

A front grille is located at the front end of the vehicle so as to form an engine room in the front of the vehicle and has a grille opening that introduces running wind into the engine room.
With the radiator located behind the front grill,
A fan shroud placed on the rear surface of the radiator and accommodating a cooling fan,
An engine located behind the fan shroud and having an air cleaner at the top,
An intake duct arranged between the fan shroud and the air cleaner and supplying air taken in from the engine room to the air cleaner is an intake structure of a vehicle intake device housed in the engine room.
The intake duct extends in the vehicle width direction and extends.
An intake inlet for taking in air from the engine room opens at one end of the intake duct in the vehicle width direction toward one end in the vehicle width direction.
An intake outlet connected to the air cleaner is formed at the other end of the intake duct in the vehicle width direction.
At one end of the intake duct in the vehicle width direction,
The first shielding wall arranged in front of the intake inlet and
A second shield wall extending rearward from one end of the first shield wall in the vehicle width direction and facing the intake port in the vehicle width direction is provided.
Air introduction through which air taken into the intake inlet passes behind the first shield wall and between the second shield wall and the intake inlet by the first shield wall and the second shield wall. Space is formed ,
The intake inlet is arranged at a position that does not overlap with the radiator and the fan shroud in a front view of the vehicle from the front.
The lower end of the intake inlet is arranged at a position overlapping the upper region of the grill opening in a front view of the vehicle from the front.
The intake duct is bent so that the intake inlet is located in front of the intake outlet.
Intake structure of the from below to the air introduction space as air is introduced, the lower end portion of the first shielding wall is arranged in front of the upper end portion vehicular intake device according to claim Rukoto. A front grille is located at the front end of the vehicle so as to form an engine room in the front of the vehicle and has a grille opening that introduces running wind into the engine room.
With the radiator located behind the front grill,
A fan shroud placed on the rear surface of the radiator and accommodating a cooling fan,
An engine located behind the fan shroud and having an air cleaner at the top,
An intake duct arranged between the fan shroud and the air cleaner and supplying air taken in from the engine room to the air cleaner is an intake structure of a vehicle intake device housed in the engine room.
The intake duct extends in the vehicle width direction and extends.
An intake inlet for taking in air from the engine room opens at one end of the intake duct in the vehicle width direction toward one end in the vehicle width direction.
An intake outlet connected to the air cleaner is formed at the other end of the intake duct in the vehicle width direction.
At one end of the intake duct in the vehicle width direction,
The first shielding wall arranged in front of the intake inlet and
A second shield wall extending rearward from one end of the first shield wall in the vehicle width direction and facing the intake port in the vehicle width direction is provided.
Air introduction through which air taken into the intake inlet passes behind the first shield wall and between the second shield wall and the intake inlet by the first shield wall and the second shield wall. Space is formed,
The second shielding wall is
A flat inclined portion that is continuous with one end of the first shielding wall in the vehicle width direction and is inclined so as to be separated from the intake inlet as it extends rearward.
A flat horizontal portion that is continuous with the rear end of the inclined portion and extends rearward at an equidistant distance from the intake inlet.
It has a bent portion that connects the inclined portion and the horizontal portion, and has a bent portion.
The bent portion is an intake structure of a vehicle intake device, characterized in that the bent portion is arranged behind the lower end portion of the first shielding wall. The second shielding wall is
A flat inclined portion that is continuous with one end of the first shielding wall in the vehicle width direction and is inclined so as to be separated from the intake inlet as it extends rearward.
A flat horizontal portion that is continuous with the rear end of the inclined portion and extends rearward at an equidistant distance from the intake inlet.
It has a bent portion that connects the inclined portion and the horizontal portion, and has a bent portion.
The intake structure of the vehicle intake device according to claim 1, wherein the bent portion is arranged behind the lower end portion of the first shielding wall. The intake duct has a resonator that is located close to the intake inlet and projects rearward from the rear end of the intake duct.
The intake structure of the intake device for a vehicle according to any one of claims 1 to 3, wherein the resonator extends rearward from the rear end portion of the second shielding wall. The resonator is composed of a plurality of cylindrical cylindrical portions extending in parallel with each other toward the rear.
The rear end of the resonator is provided with a connecting portion for connecting the plurality of cylindrical portions.
The intake structure of the vehicle intake device according to claim 4, wherein the resonator is supported by the engine via the connection portion. A reserve tank for storing cooling water is arranged at one end in the vehicle width direction on the rear surface of the fan shroud.
Claims 1 to 5 are characterized in that the reserve tank has a bulging portion that bulges outward in the vehicle width direction from one end in the vehicle width direction of the radiator when the vehicle is viewed from the front. The intake structure of the vehicle intake device according to any one of the above items. The bulging portion is used as a first bulging portion, and the reserve tank has a first bulging portion and a second bulging portion that bulges rearward when the vehicle is viewed from the side. ,
The intake structure of the vehicle intake device according to claim 6, wherein the rear end portion of the second bulging portion is located below the lower end portion of the first shielding wall.

Images