JP6089790B2 - Intake device for vehicle engine - Google Patents

Description

  The present invention relates to an intake device for a vehicle engine, and more particularly to an intake device for a vehicle engine that can supply only low-temperature air to an air cleaner.

  2. Description of the Related Art Conventionally, an intake duct structure for a vehicle engine is known in which an intake duct is connected to an air cleaner disposed above an engine disposed behind a radiator via an inlet duct (for example, a patent) Reference 1). The intake duct includes an intake port for introducing air and an exhaust port for discharging foreign matter and the like. The inlet duct is connected to the intake duct at an intermediate connection port of the intake duct. In the intake duct, the intake port is disposed above the radiator. In a vehicle equipped with such an intake duct, it is necessary to provide an opening for introducing air into the intake port of the intake duct above or above the front bumper. Moreover, in this intake device, the connection port (connection part) with the inlet duct in an intake duct is arrange | positioned in the position higher than an exhaust port.

JP 2007-308000 A

  However, if an opening is provided above or above the front bumper at the front end of the vehicle, the vehicle air resistance coefficient (Cd value) may increase, leading to a reduction in fuel consumption. Moreover, in the said intake duct structure, since the connection port of an intake duct is arrange | positioned in the position higher than an exhaust port, when an engine is stopped temporarily, hot air of an engine room becomes easy to flow from an exhaust port to a connection port. For this reason, when the vehicle is re-traveled from the temporarily stopped state, hot air flows from the air cleaner to the engine, and the output performance of the engine may be deteriorated. Further, in the above structure, in order to reduce the vehicle air resistance coefficient (Cd value), it is considered that an opening for introducing air into the intake port of the intake duct is disposed near or below the center of the front bumper in the vehicle vertical direction. It is done. When the vehicle travels on a submerged road, rainwater contained in the road surface or foreign matter accumulated in the rainwater easily flows into the connection port from the suction port, causing the filter element provided in the air cleaner to become dirty or clogged. It is conceivable that the output performance of the system will deteriorate.

  The present invention has been made in view of the above problems, and provides an air intake device for a vehicle engine that improves the output performance of the engine by causing the air cleaner to suck only low-temperature air while reducing the vehicle air resistance. The purpose is to provide.

In order to solve the above-described problems and achieve the object, an aspect of the present invention includes an intake hose for taking air into an air cleaner disposed in the vicinity of an upper portion of an engine disposed in an engine room at the front of the vehicle, An air intake device for a vehicle engine comprising an air intake duct connected to take in air into a hose, and the air intake duct includes an intake opening that opens toward a front bumper bumper opening at a front end in a vehicle front-rear direction. A first air passage portion that is disposed at a position higher than the suction port at a rear end portion in the vehicle front-rear direction and has a discharge port that opens toward the engine room, and an intermediate portion in the vehicle front-rear direction of the first air passage portion And an air intake port through which a part of the air flowing in the first air passage portion flows into the intake hose, and a branch from the air intake port and a position higher than the exhaust port. A second air passage portion extending to the upstream end portion of the intake hose, and extending in a vehicle front-rear direction by extending the inner bottom surface in the middle portion of the first air passage portion from the suction port side to the discharge port side. The first air passage portion has an inclined surface inclined obliquely upward, an air outlet is provided in a region of the ceiling surface of the first air passage portion facing the inclined surface, and the second air passage portion has an air intake in the air flow direction. A curved portion that curves from the outlet toward the upstream end of the intake hose while extending upward is provided .

  As the above aspect, it is preferable that the bumper opening is arranged at the center of the front bumper in the vertical direction or at the vehicle lower side than the center.

As the above aspect, a bulging portion that bulges upward from the ceiling surface is formed in a region facing the inclined surface in the ceiling surface of the first air passage portion, and the bulging portion It is preferable that the air outlet is formed .

  As said aspect, it is preferable that the discharge port is arrange | positioned in the position higher than an air outlet.

  As the above aspect, the turbocharger is disposed on the front side in the vehicle longitudinal direction of the engine, the intake duct is disposed on the front side in the vehicle longitudinal direction of the turbocharger, and the discharge port of the intake duct is disposed so as to face the turbocharger. It is preferred that

  In the above aspect, the intake duct is offset to one side in the vehicle width direction of the engine room from the supercharger, and the discharge port is positioned from one side of the engine room in the vehicle width direction to the other side in the vehicle width direction. It is preferable that the air cleaner and the intake hose are arranged opposite to the supercharger with respect to the discharge port in the vehicle width direction of the engine room.

  According to the present invention, it is possible to realize an air intake device for a vehicle engine that improves the output performance of the engine by causing the air cleaner to suck only low-temperature air while reducing the vehicle air resistance.

FIG. 1 is a plan view of a front portion of a vehicle on which an intake device for a vehicle engine according to a first embodiment of the present invention is mounted. FIG. 2 is a front view of the front portion of the vehicle on which the intake device for a vehicle engine according to the first embodiment of the present invention is mounted. FIG. 3 is a side view of the front portion of the vehicle on which the vehicle engine intake system according to the first embodiment of the present invention is mounted. 4 is a cross-sectional view taken along the line IV-IV in FIG. FIG. 5 is a cross-sectional view showing a state in which an intake duct in an intake device for a vehicle engine according to a second embodiment of the present invention is cut along a plane in the vertical direction along the vehicle longitudinal direction. FIG. 6 is a plan view of the front portion of the vehicle on which the vehicle engine intake device according to the third embodiment of the present invention is mounted.

Below, the detail of the intake device of the engine for vehicles which concerns on embodiment of this invention is demonstrated based on drawing.
[First Embodiment]
(Vehicle side configuration with intake device)
As shown in FIGS. 1 to 3, a front bumper 2 is provided at the front end portion of the vehicle front portion 1. The engine room 3 in the vehicle front portion 1 includes an engine 4, an air cleaner 5, a transmission 6, a supercharger 7, and an intercooler 8.

  As shown in FIG. 1 and FIG. 2, the engine 4 is disposed in the approximate center of the engine room 3. The air cleaner 5 is disposed near the upper portion of the engine 4 (right side in the vehicle width direction). The transmission 6 is disposed on the left side of the engine 4 in the vehicle width direction. The supercharger 7 is arranged on the front side of the engine 4 in the vehicle longitudinal direction. The intercooler 8 is disposed on the front side of the engine 4 and the supercharger 7 in the vehicle longitudinal direction.

  As shown in FIGS. 1 to 3, an intake manifold 9 is provided at the rear upper portion of the engine 4 in the vehicle front-rear direction. An exhaust pipe 10 is connected to the front side of the engine 4 in the vehicle longitudinal direction. The exhaust pipe 10 is provided so as to extend through the supercharger 7 to a muffler (not shown) at the rear of the vehicle. An intercooler 8 is disposed on the front side of the engine 4 in the vehicle longitudinal direction.

(Configuration of air intake device)
The air cleaner 5 is provided with an intake device 20. The intake device 20 includes an intake hose 11 and an intake duct 12. The intake hose 11 is connected to the air cleaner 5. The intake hose 11 has a function of taking air into the air cleaner 5. An intake duct 12 that takes air into the intake hose 11 is connected to the upstream end of the intake hose 11.

  As shown in FIGS. 2 and 3, the air cleaner 5 includes a filter element 5A. As shown in FIGS. 1 and 3, the air cleaner 5 is connected to an air cleaner outlet pipe 13 for taking out air. The downstream end of the air cleaner outlet pipe 13 is connected to the intercool line pipe 14 via the supercharger 7. That is, the air introduced from the air cleaner outlet pipe 13 communicates with the upstream end of the intercool line pipe 14 via the supercharger 7. The downstream end of the intercool line pipe 14 is connected to the intercooler 8. An intercooler outlet pipe 15 is connected to the intercooler 8. The downstream end of the intercooler outlet pipe 15 is connected to the intake manifold 9.

  As shown in FIG. 3, the intake duct 12 includes a first air passage portion 16 and a second air passage portion 17 that communicates with an air outlet 16 </ b> A formed in the ceiling surface of the intermediate portion of the first air passage portion 16. And comprising. The first air passage 16 has a suction port 16B formed at one end (front end in the vehicle front-rear direction) and a discharge port 16C formed at the other end. As shown in FIG. 1, the intake duct 12 is disposed so that the suction port 16 </ b> B of the first air passage portion 16 communicates with a bumper opening 2 </ b> A formed in the front bumper 2. The first air passage portion 16 is arranged so that the inlet 16B to the outlet 16C extend obliquely upward toward the rear of the vehicle. As shown in FIGS. 2 to 4, the bumper opening 2 </ b> A is disposed in the center of the front bumper 2 in the vertical direction. The bumper opening 2 </ b> A may be disposed on the vehicle lower side than the central portion of the front bumper 2 in the vertical direction.

  As shown in FIG. 4, on the inner bottom surface of the first air passage portion 16, an inclined portion (inclined surface) 16D inclined obliquely upward toward the rear of the vehicle from the air outlet 16A side to the outlet port 16C side. Is formed. A bulging portion 16E that bulges upward in a convex shape is formed in an upper region of the ceiling surface of the first air passage portion 16 that faces the inclined portion 16D. The air outlet 16A is formed in the bulging portion 16E.

  The second air passage portion 17 is formed to extend upward from the air outlet 16A to the communication port 17A that is the upper end portion. The communication port 17 </ b> A is disposed on the upper side in the vehicle vertical direction with respect to the discharge port 16 </ b> C of the first air passage portion 16 and is connected to communicate with the upstream end portion 11 </ b> A of the intake hose 11. The second air passage portion 17 has a curved portion 17B that curves from the air outlet 16A to the upper side in the vertical direction and curves backward in the vehicle.

(Action / Effect)
As shown in FIG. 3 and FIG. 4, in the intake device 20 according to the present embodiment, the front bumper 2 is located at a relatively low position in the vehicle vertical direction in the front end portion of the vehicle. A bumper opening 2A is provided in a region located on the lower side (a lower portion in the vertical direction of the front bumper 2). Therefore, in the present embodiment, low-temperature air is sent into the intake duct 12 from the bumper opening 2A. Therefore, in this intake device 20, it is not necessary to provide an opening for the intake duct at a position higher in the vertical direction upper side of the front bumper 2 or at the front end of the vehicle. Therefore, in the vehicle provided with the intake device 20, the air resistance coefficient (Cd value) applied to the vehicle during traveling can be reduced, and the vehicle air resistance can be reduced.

  As shown in FIGS. 3 and 4, in such an intake device 20, when the vehicle travels on a flooded channel, air (indicated by an arrow E <b> 1 in the figure), rainwater, foreign matter, etc. (indicated by an arrow W in the figure) are generated. It is introduced into the suction port 16B from the bumper opening 2A. In the present embodiment, even if the vehicle travels on the submerged channel, rainwater, foreign matter, etc. (indicated by an arrow W in the figure) are discharged from the discharge port 16C of the first air passage portion 16. Therefore, it is possible to prevent liquid, foreign matter, etc. (indicated by arrow W in the figure) from entering the downstream side of the second air passage portion 17 disposed at a position higher than the discharge port 16C. For this reason, it is possible to prevent the filter element 5A provided in the air cleaner 5 from being soiled or clogged by foreign matter contained in rainwater.

  As shown in FIGS. 3 and 4, in the above structure, since the second air passage portion 17 is branched from the air outlet 16 </ b> A formed in the ceiling surface of the first air passage portion 16, heavy rainwater and foreign matter Is discharged from the discharge port 16 </ b> C along the bottom surface of the first air passage portion 16. On the other hand, air (indicated by an arrow E2 in FIGS. 3 and 4) that is lighter than liquid (rain water) or foreign matter is likely to flow along the ceiling surface side of the first air passage portion 16. Therefore, only air can flow to the second air passage portion 17 through the air outlet 16A. Therefore, in this embodiment, only low-temperature air can be sent into the air cleaner 5.

  In the present embodiment, the first air passage portion 16 is formed so as to extend obliquely upward from the suction port 16B to the discharge port 16C toward the rear of the vehicle. For this reason, when heavy rainwater or foreign matter hits the bottom surface of the first air passage portion 16, the rainwater or foreign matter is returned to the suction port 16B side by its own weight and discharged to the outside of the vehicle. Therefore, in the intake device 20 according to the present embodiment, only low-temperature air is allowed to flow into the air cleaner 5 side, and intrusion of rainwater and foreign matter can be prevented. Can be prevented. For this reason, according to the intake device 20 according to the present embodiment, the output of the engine 4 can be increased. Thus, in the present embodiment, both reduction of vehicle air resistance and improvement of output performance of the engine 4 can be achieved at the same time.

  In addition, in the intake device 20 according to the present embodiment, when the vehicle travels in the submerged channel and the bumper opening 2A and the suction port 16B are completely immersed in the submerged channel, the intake device 20 is at a higher position than the suction port 16B. Air can be sucked into the air outlet 16A from the outlet 16C. In such a case, since the engine is cooled by rainwater in the submerged channel, the air supplied from the periphery of the engine 4 is relatively cool air. Therefore, in the intake device 20, relatively hot air does not enter the intake duct 12. For this reason, as much low-temperature air as possible can be fed into the air cleaner 5 and the output performance of the engine 4 can be improved.

  In the intake device 20 according to the present embodiment, even if rainwater or foreign matter enters from the first air passage portion 16 to the second air passage portion 17, the curved portion 17B provided in the second air passage portion 17 is heavy. A certain rainwater or a foreign substance can be dropped to the lower side of the vehicle and returned to the first air passage portion 16. Even if rainwater or foreign matter enters the curved portion 17B of the second air passage 17, the rainwater or foreign matter collides with the inner peripheral surface of the curved portion 17B, and heavy rainwater or foreign matter is dropped below the vehicle. Thus, it can be reliably returned to the first air passage portion 16. This makes it difficult for rainwater and foreign matter to reach the intake hose 11 or the air cleaner 5, and can reliably prevent the air cleaner 5 from being soiled or clogged.

  In the present embodiment, by forming the bulging portion 16E, the distance between the air outlet 16A and the inclined portion 16D can be increased, and rainwater and foreign matters enter the air outlet 16A from the inclined portion 16D. Can be prevented. Further, by providing the bulging portion 16E, it is possible to temporarily reduce the air flow velocity on the peripheral surface of the air outlet 16A, and it is possible to flow as much low-temperature air as possible into the air cleaner 5 side. 4 output performance can be improved. When the vehicle is temporarily stopped or travels at a low speed, even if hot air in the engine room 3 enters from the outlet 16C of the intake duct 12, the hot air can hardly reach the air outlet 16A, and the air outlet 16A. Therefore, it is possible to prevent hot air from being sucked into the air cleaner 5 and to improve the output performance of the engine 4.

[Second Embodiment]
FIG. 5 shows an intake duct 12A constituting the intake device 20A according to the second embodiment of the present invention. As shown in FIG. 5, in the present embodiment, the height position H2 of the lower end portion of the discharge port 16C is higher than the height position H1 of the upper end portion of the air intake port 16A of the intake duct 12A by a length h. Is arranged. Other configurations of the intake duct 12A according to the present embodiment are the same as the configurations of the intake duct 12 according to the first embodiment described above.

  As shown in FIG. 5, in the present embodiment, when the vehicle is temporarily stopped or travels at a low speed, even if the hot air G in the engine room 3 enters from the discharge port 16C of the intake duct 12 due to the above structure, It is difficult to reach the outlet 16A. Therefore, in this air intake device 20A, it is possible to prevent hot air from being sucked into the air cleaner 5 from the air outlet 16A, and the output performance of the engine 4 can be enhanced.

[Third Embodiment]
As shown in FIG. 6, the intake duct 12B constituting the intake device 20B according to the third embodiment of the present invention is offset to one side (right side) in the vehicle width direction of the engine room 3 with respect to the supercharger 7. It is arranged at the position. In the intake duct 12B, the supercharger in which the discharge port 16C of the first air passage portion 16 is located on the other side in the vehicle width direction from one side in the vehicle width direction of the engine room 3 (right arrow direction side in FIG. 6). 7 is set to face each other. In the present embodiment, in the vehicle width (left and right) direction of the engine room 3, the air cleaner 5 and the intake hose 11 are opposite to the supercharger 7 with respect to the discharge port 16 </ b> C of the first air passage portion 16 ( It is arranged on the right side of the vehicle in the left-right direction).

  As shown in FIG. 6, in the present embodiment, the air that has passed through the first air passage portion 16 can be intensively blown from the discharge port 16C toward the supercharger 7, and the supercharger 7 can be cooled. . In FIG. 6, an arrow E <b> 3 indicates a flow of air containing hot air after the supercharger 7 is cooled. Thus, in this Embodiment, since the supercharger 7 can be cooled, it can prevent that the temperature in the engine room 3 rises excessively with the heat | fever of the supercharger 7. FIG.

  Moreover, in this Embodiment, since the supercharger 7 can be cooled, it can suppress that the temperature of the air which flows toward the air cleaner 5 or the air which flows from the air cleaner 5 to the engine 4 rises excessively, The output performance can be improved reliably. And the flow (it shows by arrow E3 in FIG. 6) of the hot air emitted from the supercharger 7 by blowing the air which passed the 1st air passage part 16 toward the supercharger 7 from the supercharger 7. , Can be directed to the other outside (that is, the left side of the engine room 3 in the left-right direction of the vehicle) away from the intake duct 12B in the vehicle width direction.

  In the present embodiment, the air cleaner 5 and the intake hose 11 are arranged on the opposite side of the supercharger 7 with respect to the discharge port 16C in the vehicle width direction of the engine room 3 so that the air cleaner 5 and the intake hose 11 are excessively disposed. The hot air from the feeder 7 can be kept away. As a result, the air flowing through the air cleaner 5 and the intake hose 11 is not heated by the hot air from the supercharger 7. Therefore, in this intake device 20B, low-temperature air can be sent into the engine 4, and the output performance of the engine 4 can be reliably improved.

(Other embodiments)
Although the embodiment has been described above, the present invention is not limited to this, and various design changes are possible. For example, in the first and second embodiments, the present invention is applied to a vehicle including the intercooler 9 and the supercharger 7, but the present invention may naturally be applied to a vehicle not including these.

DESCRIPTION OF SYMBOLS 1 Vehicle front part 2 Front bumper 2A Bumper opening part 3 Engine room 4 Engine 5 Air cleaner 5A Filter element 7 Supercharger 11 Intake hose 11A Upstream end part 12 Intake duct 13 Air cleaner outlet pipe 14 Intercool linelet pipe 15 Intercooler outlet pipe 16 First air passage portion 16A Air outlet 16B Suction port 16C Discharge port 16D Inclined portion 16E Swelling portion 17 Second air passage portion 17A Communication port 17B Bending portion 20 Intake device

Claims (6)

A vehicle engine comprising: an intake hose for taking air into an air cleaner arranged near an upper portion of an engine arranged in an engine room in front of the vehicle; and an intake duct connected to take air into the intake hose In the intake system of
The intake duct is disposed at a front end in the front-rear direction of the vehicle toward the bumper opening of the front bumper and at a rear end of the front-rear direction of the vehicle at a position higher than the intake port and is directed toward the engine room. A first air passage portion having a discharge opening that is open to
An air outlet that is formed at an intermediate portion of the first air passage portion in the vehicle front-rear direction and flows a part of the air flowing in the first air passage portion into the intake hose;
A second air passage portion branched from the air outlet and extending to an upstream end portion of the intake hose disposed at a position higher than the exhaust port,
An inner bottom surface of the intermediate portion of the first air passage portion is linearly extended from the suction port side toward the discharge port side, and is an inclined surface inclined obliquely upward toward the rear in the vehicle front-rear direction;
The air outlet is provided in a region facing the inclined surface of the ceiling surface in the first air passage portion,
An intake device for a vehicle engine, wherein the second air passage portion is provided with a curved portion that extends upward from the air outlet in the air flow direction and curves toward the upstream end of the intake hose .   2. The intake device for a vehicle engine according to claim 1, wherein the bumper opening is disposed at a central portion in a vertical direction of the front bumper or at a lower side of the vehicle than the central portion. A bulging portion that bulges upward from the ceiling surface is formed in a region of the ceiling surface of the first air passage portion that faces the inclined surface, and the air outlet is formed in the bulging portion. intake system for a vehicle engine according to claim 1 or claim 2, characterized in that There are formed. The said exhaust port is arrange | positioned in the position higher than the said air intake port, The intake device of the vehicle engine as described in any one of Claims 1-3 characterized by the above-mentioned. A turbocharger is arranged on the front side of the engine in the longitudinal direction of the engine, the intake duct is arranged on the front side of the turbocharger in the longitudinal direction of the vehicle, and the exhaust port of the intake duct faces the supercharger. intake system for a vehicle engine according to any one of claims 1 4, characterized that it is. The intake duct is offset from the supercharger to one side in the vehicle width direction of the engine room, and the exhaust port is positioned from one side of the engine room in the vehicle width direction to the other side in the vehicle width direction. Facing the supercharger,
6. The vehicle engine intake air according to claim 5 , wherein the air cleaner and the intake hose are arranged on the opposite side of the supercharger with respect to the discharge port in a vehicle width direction of the engine room. apparatus.

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