JP6277901B2 - Intake device for vehicle engine - Google Patents

Description

  The present invention relates to an intake device for a vehicle engine, and more particularly to a structure of an air introduction path for supplying air to an air cleaner.

  In general, an air cleaner is connected to a vehicle engine (hereinafter referred to as an engine). An intake duct for taking in air is connected to the air cleaner. There is a case where the air intake serving as the upstream end of the intake duct is disposed in the engine room. For example, Japanese Unexamined Patent Application Publication No. 2009-208745 discloses an arrangement structure of an intake duct connected to an air cleaner in an engine room. This air cleaner is installed behind the headlamp. The air intake duct passes from the lower side of the headlamp to the front of the radiator, and an air intake port is arranged at the upper position of the radiator toward the vehicle rear side.

JP 2009-208745 A

  However, with such a conventional intake duct arrangement structure, traveling wind cannot be directly taken from the air intake when traveling. This air intake port passes through the radiator and becomes hot, and sucks an air flow that is turbulent in the engine room. Further, the air intake sucks hot air in the engine room when the vehicle is stopped. Therefore, the air introduced into the engine through the air cleaner may become high temperature. Here, the hot air in the engine room includes air heated directly or indirectly by the engine and traveling wind heated through the radiator as described above. If the intake air to the engine becomes hot, it may cause a decrease in engine output, which adversely affects engine performance. Therefore, it is conceivable to arrange the air intake port of the intake duct so that it faces the front side of the vehicle. However, snow or the like may enter from the air intake port and the air cleaner may be clogged.

  The present invention has been made in view of the above-described problem, and is a vehicle capable of improving engine performance by incorporating low-temperature air into an air cleaner and preventing clogging of the air cleaner by preventing snow and the like from entering the air cleaner. An object of the present invention is to provide an engine intake system.

  According to an aspect of the present invention, a front bumper having a bumper opening that penetrates in the vehicle front-rear direction is disposed at a front portion of an engine room, and a radiator and an electric fan are sequentially arranged behind the front bumper toward the rear of the vehicle. And a vehicle engine intake device provided in a vehicle provided with an intake duct provided on a side of the radiator in the vehicle width direction and provided to communicate with an air cleaner. An upstream end opening disposed on the rear side of the opening in the longitudinal direction of the vehicle so as to face the bumper opening, and a downstream end opening, and the upstream end along the vertical direction from the upstream end opening. It is arranged so as to extend upward from the end opening, and has a flow path bending portion that bends the flow path in the intake duct to the radiator side upstream of the downstream end opening. The extended position of the bent flow path at the curved portion, characterized in that the formation of the branch passage opening at the vehicle longitudinal direction in front of the radiator.

  According to the aspect of the present invention, it is possible to realize an air intake device for a vehicle engine that can introduce low-temperature air into the air cleaner to improve engine performance and prevent clogging of the air cleaner by preventing snow and the like from entering the air cleaner.

FIG. 1 is a front view of a vehicle equipped with an intake device for a vehicle engine according to an embodiment of the present invention. FIG. 2 is a plan view of the intake device for the vehicle engine according to the embodiment of the present invention. FIG. 3 is an explanatory front view showing the intake device for the vehicle engine according to the embodiment of the present invention. 4 is a cross-sectional view taken along the line IV-IV in FIG.

  Hereinafter, an intake device for a vehicle engine according to an embodiment of the present invention will be described with reference to the drawings. As shown in FIG. 1, an engine room 3 covered with an engine hood 2 is formed at the front portion of the vehicle 1. A front bumper 4 is disposed at the front of the engine room 3. The front bumper 4 is provided with a radiator grill 4A as a bumper opening that penetrates in the vehicle front-rear direction. This radiator grille 4A is an opening for taking cooling air into a radiator 6 described later.

  In the engine room 3, a condenser 5 for an air conditioner, a radiator 6, and a radiator fan 7 as an electric fan are sequentially arranged behind the front bumper 4 toward the rear of the vehicle. As shown in FIG. 2, the capacitor 5, the radiator 6, and the radiator fan 7 are included by a fan shroud 8. The radiator fan 7 has a function of taking outside air into the radiator 6.

  An engine 9 is disposed in the engine room 3 behind the radiator fan 7. The engine 9 is provided with an intake manifold and an exhaust manifold (not shown). A head cover 10 is provided on the upper portion of the engine 9. The radiator fan 7 is driven to rotate even when the vehicle is stopped. For this reason, even when the vehicle is stopped, the air flows from the front side in the vehicle longitudinal direction toward the radiator 6 toward the rear in the vehicle longitudinal direction. Note that an arrow A shown in FIG. 2 indicates the flow of air.

(Configuration of air intake device)
As shown in FIG. 2, the intake device 11 according to the present embodiment includes an intake duct 20, an air intake pipe 30, an air cleaner 40, and an air extraction pipe 50.

  As shown in FIG. 3, the intake duct 20 is disposed so as to extend in the vehicle vertical direction. In the present embodiment, the intake duct 20 is a cylindrical hollow body. The intake duct 20 is disposed on the side of the radiator 6 in the vehicle width direction. That is, as shown in FIG. 2, the intake duct 20 is disposed at a position where it does not interfere with the airflow A such as running wind supplied from the front of the vehicle 1 and intake air by the radiator fan 7 supplied to the radiator 6. .

  The lower end of the intake duct 20 serves as an air intake 21 as an upstream end opening. The air intake 21 is opened at a position facing the radiator grille 4 </ b> A on the rear side in the vehicle front-rear direction of the radiator grille 4 </ b> A in the front bumper 4. The intake duct 20 is disposed so as to extend upward from the air intake port 21 along the vertical direction. The upper end of the intake duct 20 has an air outlet 22 as a downstream end opening. In the intake duct 20, an air flow path 23 is formed from the air intake port 21 toward the air extraction port 22.

  The intake duct 20 has a flow path bending portion 23 </ b> A that bends the flow of air passing through the flow path 23 toward the radiator 6 in the flow path 23 on the downstream side of the air intake 21. The intake duct 20 has a branch pipe 24 in the vicinity of the flow path bending portion 23A. A cylindrical hole inside the branch pipe 24 forms a branch passage 24A. The tip of the branch pipe 24 forms an opening 24B. The opening 24 </ b> B is disposed on the front side in the vehicle front-rear direction of the radiator 6. The branch passage 24A of the branch pipe 24 is disposed at a downstream position of the air flow B (arrow indicated by a one-dot chain line in FIG. 3) B bent by the flow path bending portion 23A.

  The flow path bending portion 23 </ b> A has a collision wall 25 with which the air taken in from the air intake 21 collides. The collision wall 25 is disposed below the air outlet 22 of the intake duct 20 and is inclined so as to guide the air taken in from the air inlet 21 toward the branch passage 24A.

  In the present embodiment, the air intake pipe 30 includes a flexible hose-shaped first air intake pipe 31 and a second air intake pipe connected to the air cleaner 40 that communicates with the first air intake pipe 31. 32. The air cleaner 40 is disposed on the head cover 10 of the engine 9. The air cleaner 40 is connected to an intake manifold side (not shown) of the engine 9 via an air extraction pipe 50.

(Operation and effect of intake device)
In the intake device 11 according to the present embodiment, the flow path 23 is set so that the intake duct 20 takes in the intake air from the air intake port 21 located at the lower portion and flows the intake air upward. For this reason, there exists an effect | action that the snow, foreign material, etc. which entered from the air intake 21 are hard to flow downstream. That is, in the intake device 11 of the present embodiment, it is possible to prevent snow or foreign matter from entering the air cleaner 40 through the intake duct 20.

  As shown in FIG. 3, in the present embodiment, even if snow enters the flow path 23, the air B flowing through the flow path 23 in the intake duct 20 passes through the flow path bending portion 23A. The snow S contained in the air flows to the branch passage 24A by inertial force and then is discharged from the opening 24B (snow does not flow to the air outlet 22 against the inertial force). Therefore, only air (the air flow is indicated by arrow C) can be sent to the air outlet 22. Thereby, in the intake device 11 according to the present embodiment, it is possible to prevent snow and foreign matter from entering the air outlet 22.

  In the intake device 11 according to the present embodiment, air is pulled by the radiator fan 7 in the opening 24B of the branch passage 24A using the suction force of the radiator fan 7 even when the vehicle is stopped. Accordingly, low-temperature air is sucked from the air intake 21. For this reason, a low-temperature air flow is generated in the flow path 23 of the intake duct 20. Therefore, the low temperature air in the flow path 23 is sucked into the air outlet 22 which is the downstream end opening of the intake duct 20, and the low temperature air can be sent to the air cleaner 40 side.

  For this reason, in the intake device 11 according to the present embodiment, it is possible to prevent foreign matters such as snow from entering the air cleaner 40. Moreover, according to this intake device 11, low temperature air can be sent to the air cleaner 40, and engine performance can be improved.

  In the intake device 11 according to the present embodiment, a collision wall 25 is disposed in the flow path 23 of the intake duct 20 on the upstream side of the branch passage 24A, where the air taken in from the air intake 21 collides. For this reason, as shown in FIG. 3, the air that has entered through the air inlet 21 collides with the collision wall 25, so that the snow S contained in the air can be separated and discharged from the opening 24B of the branch passage 24A. . Thereby, in this Embodiment, it can prevent that snow flows into the air intake pipe 30 side.

  In the intake device 11 according to the present embodiment, the collision wall 25 is disposed below the air outlet 22 of the intake duct 20, and the collision wall 25 is inclined so that the air flow is guided toward the branch passage 24A. Since it is a structure, it makes it easy to flow the air flow to the branch passage 24A. Thereby, the snow S guided by the collision wall 25 is easily released from the opening 24A of the branch pipe 24. For this reason, in the present embodiment, the action of the collision wall 25 can prevent the snow S from flowing to the downstream side of the intake duct 20.

  Further, in the intake device 11 according to the present embodiment, as shown in FIG. 4, the traveling wind taken from the air intake 21 having a relatively large opening area is relatively cross-sectional area located on the air intake 21. Passes through the narrow channel 23. For this reason, when the traveling wind enters the flow path 23 from the air intake port 21, the flow velocity increases and the traveling wind strongly collides with the collision wall 25. At this time, when the running wind is mixed with snow, the snow strongly hits the collision wall 25, and the snow is reliably guided to the branch passage 24 </ b> A along the inclination of the collision wall 25. For this reason, in the structure of the intake device 11 according to the present embodiment, it is possible to reliably guide snow to the branch passage 24A and prevent snow or the like from entering the air cleaner 40 side.

(Other embodiments)
Although the embodiment has been described above, it should not be understood that the description and the drawings constituting a part of the disclosure of the embodiment limit the present invention. For example, the collision wall 25 provided in the flow path bending portion 23A may be planar or curved. In the present embodiment, the intake duct 20 has a rectangular tube shape. However, the intake duct 20 has a structure that rises downstream from the air intake port 21 at the lower end, and has a flow path bending portion 23A and a branch passage 24A. However, the present invention is not limited to this.

  Further, as shown in FIGS. 3 and 4, in the above-described embodiment, the flow path 23 extending from the air intake 21 to the flow path bending portion 23 </ b> A is formed to extend straight. The part may be curved.

1 Vehicle 3 Engine room 4 Front bumper 4A Radiator grill (bumper opening)
6 Radiator 7 Radiator fan (electric fan)
9 Engine 11 Air intake device 20 Air intake duct 21 Air intake (upstream end opening)
22 Air outlet (downstream end opening)
23 flow path 23A flow path bent portion 24A branch path 25 collision wall 40 air cleaner

Claims (3)

A front bumper having a bumper opening penetrating in the vehicle front-rear direction is disposed at the front of the engine room, and a radiator and an electric fan are sequentially disposed behind the front bumper toward the rear of the vehicle. In a vehicle engine intake device provided in a vehicle,
An air intake duct disposed on the side of the radiator in the vehicle width direction and provided to communicate with an air cleaner;
The intake duct has an upstream end opening disposed on the rear side of the bumper opening in the vehicle front-rear direction so as to face the bumper opening, and a downstream end opening, and from the upstream end opening Arranged to extend upward from the upstream end opening along the vertical direction,
On the upstream side of the downstream end opening, a flow path bending portion that bends the flow path in the intake duct toward the radiator,
An air intake apparatus for a vehicle engine, wherein a branch passage that opens in a front-rear direction of the radiator in the vehicle front-rear direction is formed at an extended position of the flow path bent by the flow path bending portion.   The vehicle engine intake device according to claim 1, wherein the flow path bending portion includes a collision wall on which air taken in from the upstream end opening collides.   The vehicle according to claim 2, wherein the collision wall is disposed below the downstream end opening of the intake duct, and is inclined so as to guide air taken from the upstream end opening toward the branch passage. Engine intake system.

Images