JP2011213328A - Intake device of engine for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent hot air in an engine room from intruding in an air cleaner, by avoiding clogging of the air cleaner by sucking only air by removing foreign matters such as snow, in an intake device of an engine for a vehicle.SOLUTION: In an intake duct (23), an air takeout port (28) is formed for taking out the air to the air cleaner (20) between an air intake port (25) of a front end part (24) and a foreign matter discharge port (27) of a rear end part (26), the foreign matter discharge port (27) is opened toward the rear of the vehicle, and a valve element (34) is provided for opening the foreign matter discharge port (27) by wind pressure when the vehicle travels by rocking around a valve stem (33) extending along an upper edge part (32) of the foreign matter discharge port (27).

Description

  The present invention relates to an intake device for a vehicle engine, and more particularly to an intake device for a vehicle engine having an improved inlet end for introducing intake air.

In general, in a vehicle, in order to introduce more air cooled from the front into the air cleaner, an intake duct connected to the air cleaner is disposed above the radiator.
However, with such a structure, when the vehicle travels, traveling wind containing foreign matters such as snow may enter the air cleaner via the intake duct, which may cause clogging of the air cleaner.

JP 2007-308000 A JP 2003-314393 A

The intake duct structure of an engine according to Patent Document 1 includes an intake port for allowing air to flow into the intake duct and an exhaust port for discharging foreign matters such as snow, and discharges foreign matters such as snow contained in the air from the exhaust port. Only the air is sucked into the air cleaner to prevent clogging of the air cleaner.
The air intake duct mounting structure according to Patent Document 2 avoids damage to the air intake duct by allowing the bolt for attaching the air intake duct to slide at the bolt insertion portion when the radiator support is displaced rearward relative to the air intake duct. It is something to be made.

By the way, conventionally, when examining the position of the intake port, the position of the intake port is often set to a position where cold air can be sucked as much as possible. This is because the engine output and fuel consumption are improved when cold air is taken into the engine. If an intake port is set at the rear of the bumper grill, the upper portion of the radiator member support, etc., outside air can be easily introduced, and the intake air temperature can be reduced.
However, if the outside air is sucked in as it is, cold air can be sucked in, and at the same time, a large amount of snow may be sucked in the winter, and the snow is clogged inside the air cleaner, causing a reduction in engine output. Setting an air intake in the engine room can solve the problem of snow damage, but it sucks in hot air that is exhausted from exhaust system parts and a radiator fan, which may deteriorate engine performance.
For this reason, while considering the conflicting issues of cold air introduction and the need for snow damage countermeasures, search the engine room for a place where hot air does not accumulate as much as possible, set the air intake, and place the air intake where it can be introduced. If you set a hole in the rear, snow and dust can pass through as it is, and only cold air can be sent to the air cleaner. There is a risk of smoking.
Moreover, in said patent document 1, from the stop of a vehicle at the time of ultra-low-speed driving | running | working, the hot air of an engine room penetrate | invades from the open discharge port, and flows into the inside of an air cleaner, and causes the engine output fall. There was a fear.
For this reason, a structure that prevents the intrusion of hot air into the engine room while avoiding clogging of the air cleaner due to foreign matters such as snow has been desired.

  Accordingly, an object of the present invention is to remove the foreign matter such as snow and suck only the air to avoid clogging of the air cleaner, and to prevent the hot air in the engine room from entering the air cleaner. To provide an apparatus.

  According to the present invention, a radiator is disposed at the front of a vehicle, an engine and an air cleaner are disposed in an engine room behind the radiator, an air intake opening that opens in front of the vehicle, and a foreign substance that opens into the engine room. An air intake duct having outlets at the front end and the rear end in the vehicle front-rear direction is disposed above the radiator, and an air intake for taking out air to the air cleaner between the air intake and the foreign matter discharge opening. In the vehicle engine intake device having an outlet formed in the intake duct, the foreign matter discharge port is opened toward the rear of the vehicle, and swings around a valve shaft extending along the upper edge of the foreign matter discharge port. The intake duct is provided with a valve body that opens the foreign matter discharge port by wind pressure during vehicle travel.

  The air intake device for a vehicle engine according to the present invention removes foreign matters such as snow and sucks only air to avoid clogging of the air cleaner, and can prevent hot air in the engine room from entering the air cleaner.

FIG. 1 is a plan view of the front portion of the vehicle. (Example 1) FIG. 2 is a left side view of the front portion of the vehicle. (Example 1) FIG. 3 is a front view of the front portion of the vehicle. (Example 1) FIG. 4 is a perspective view of the front portion of the vehicle. (Example 1) FIG. 5 is an enlarged cross-sectional view of the air intake duct in the state during vehicle travel along the line VV in FIG. (Example 1) FIG. 6 is an enlarged cross-sectional view of the intake duct in a state where the vehicle is running at an extremely low speed from the stop of the vehicle. (Example 1) FIG. 7 is a perspective view of the front portion of the vehicle when the vehicle is running. (Example 2) FIG. 8 is a plan view of the front portion of the vehicle in a state where the vehicle is running at an extremely low speed from the stop of the vehicle. (Example 2) FIG. 9 is an enlarged cross-sectional view of an intake duct provided with a valve body having a flange portion. (Example 2)

  The object of the present invention is to remove foreign matters such as snow and suck only air to avoid clogging of the air cleaner, and to prevent the hot air in the engine room from entering the air cleaner. This is realized by providing a valve body in the intake duct that opens toward the rear of the vehicle and swings around a valve shaft extending along the upper edge of the foreign matter discharge port to open the foreign matter discharge port by wind pressure during vehicle travel. Is.

1 to 6 show Embodiment 1 of the present invention.
1-3, 1 is a vehicle, 2R right front wheel, 2L is left front wheel, 3R is front right fender, 3L is front left fender, 4R is right side frame, 4L is left side frame, 5 is dash panel, 6 is engine A room, 7 is an engine hood, 8 is a front bumper, and 9 is an upper member.
A power unit 10 is mounted on the vehicle 1 in the engine room 6.
The power unit 10 includes an engine 11 having a crankshaft oriented in the vehicle width direction Y in a direction orthogonal to the vehicle longitudinal direction X, and a transmission 12 connected to the left side of the engine 11. Therefore, the engine 11 and the transmission 12 are disposed sideways in the engine room 6.
A radiator 13 is disposed in the engine room 6 at the front of the vehicle ahead of the engine 11. A water inlet pipe 14 connected to the engine 11 at the upper portion is connected to the radiator 13, and a water outlet pipe 15 connected to the engine 11 is connected to the lower portion of the radiator 13.
A fan shroud 16 is attached to the rear surface portion of the radiator 13.

The engine 11 is provided with an intake device 17 and an exhaust device 18.
The intake device 17 includes an intake manifold 19 that is attached to the rear surface portion of the engine 11 and extends and curves upward, and an air cleaner 20 that is disposed above the engine 11. The engine 11 and the air cleaner 20 are arranged behind and above the radiator 13 in the engine room 6.
The exhaust device 18 includes an exhaust manifold 21 attached to the front surface of the engine 11 and extending downward, and a catalytic converter 22 connected to the exhaust manifold 21 and directed downward.

In the intake device 17, an intake duct 23 that guides cold air from the front of the vehicle to the air cleaner 20 is disposed above the left side of the radiator 13.
As shown in FIGS. 4 and 5, the intake duct 23 includes an air intake (intake port) 25 that is disposed behind the left side portion of the upper member 9 and opens to the front of the vehicle at the front end portion 24 in the vehicle longitudinal direction X. In addition, a foreign matter discharge port 27 that opens into the engine room 6 at the rear end portion 26 of the vehicle longitudinal direction X is provided.
The intake duct 23 is formed with an air outlet 28 for taking out air to the air cleaner 20 between the air inlet 25 and the foreign matter outlet 27. An air inlet pipe 29 for guiding air to the air cleaner 20 is connected to the air outlet 28. As shown in FIGS. 1 and 4, the air inlet pipe 29 includes a curved portion 29 </ b> A that protrudes leftward and is curved in a plan view.

  On the left side of the air cleaner 20, a battery 31 is disposed above the transmission 12, behind the curved portion 29 </ b> A of the air inlet pipe 29 and with a gap 30 of a distance L from the left side surface of the air cleaner 20. An air intake port 25 and a foreign matter discharge port 27 of the intake duct 23 are linearly arranged in front of the gap 30 in the vehicle.

And in the intake duct 23 which concerns on this Example 1, as shown in FIG. 5, the foreign material discharge port 27 is opened toward the vehicle rear. That is, the center line C between the air intake port 25 and the foreign matter discharge port 27 is inclined with respect to the horizontal line H at an angle θ toward the rear of the vehicle and obliquely upward.
Further, the intake duct 23 is provided with a valve body 34 that swings around a valve shaft 33 extending along the upper edge 32 of the foreign matter discharge port 27 and opens the foreign matter discharge port 27 by a predetermined wind pressure during vehicle travel. . The valve body 34 is attached by attachment means such as a hinge, for example, and closes the foreign matter discharge port 27 by its own weight when the wind pressure from the front of the vehicle is lower than a predetermined pressure.
In this way, the foreign matter discharge port 27 is opened toward the rear of the vehicle, and the foreign matter is swung around the valve shaft 33 extending along the upper edge portion 32 of the foreign matter discharge port 27 so that the foreign matter is generated by the wind pressure when the vehicle travels. By providing the valve body 34 that opens the discharge port 27, as shown in FIGS. 4 and 5, air containing snow and other foreign matters (indicated by an arrow A <b> 1 in FIG. 5) when the vehicle travels is air intake 25. When the air enters the engine, it swings so that the valve body 34 is opened by the wind pressure, and foreign matter such as snow (indicated by an arrow A2 in FIG. 5) contained in the air is passed through the foreign matter discharge port 27 by the inertia force. It can be discharged into the gap 30 of the room 6.
Thereby, the air intake port 28 to the air cleaner 20 formed between the air intake port 25 and the foreign matter discharge port 27 can suck only air from which foreign matters such as snow have been removed (indicated by an arrow A3 in FIG. 5). Further, clogging of the air cleaner 20 due to foreign matters such as snow can be avoided, the durability of the element can be improved, and the engine performance can be improved.

On the other hand, in an extremely low speed running state from the stop of the vehicle, the inflow amount and the flow velocity of air flowing into the engine room 6 from the front of the vehicle are reduced, so that the wind pressure for swinging the valve body 34 is reduced. As shown in FIG. 6, the foreign matter discharge port 27 is closed by the dead weight of the valve body 34.
As a result, the air from the air intake 25 (indicated by the arrow A in FIG. 6) is directly introduced to the air intake 28 and the hot air in the engine room 3 (FIG. 6) is about to enter the intake duct 23. (Shown by arrow B) is blocked by the valve body 23, and the intrusion of hot air into the air cleaner 20 can be suppressed.
Therefore, when the vehicle is stopped and the vehicle is traveling at a very low speed, the intrusion of hot air from the engine room 6 into the intake duct 23 and the air cleaner 20 can be suppressed, the output reduction of the engine 11 can be prevented, and the acceleration performance and the like can be improved.

7 to 9 show Embodiment 2 of the present invention.
In the second embodiment, portions that perform the same functions as those of the first embodiment will be described with the same reference numerals.
The features of the second embodiment are as follows. That is, as shown in FIG. 8, the valve body 34 includes enlarged portions 36 and 36 that protrude outward in the vehicle width direction Y of the intake duct 23 on the outer peripheral portion 35.
Thus, by providing the outer peripheral portion 35 of the valve body 34 with the enlarged portions 36 and 36 protruding outward from the intake duct 23, air flowing in the intake duct 23 (including foreign matters such as snow) when the vehicle travels. In addition, as shown in FIG. 8, the air flowing around (outer periphery) of the intake duct 23 can be applied to the valve body 34 and the enlarged portions 36 and 36. In other words, the air flowing around the intake duct 23 (outer periphery) can be blown to the enlarged portions 36 and 36 of the valve body 34.
As a result, a larger air volume can be applied to the valve body 34, the valve body 34 can be reliably swung, and foreign matters such as snow can be discharged from the foreign material discharge port 27.
Furthermore, by providing the outer peripheral portion 35 of the valve body 34 with the enlarged portions 36 and 36 projecting outward from the intake duct 23, the center of gravity of the valve body 34 is on the lower side (or the enlarged portion side) of the valve body 34. Can be set.
As a result, the wind pressure flowing into the engine room 6 decreases at the time of extremely low speed travel from the stop of the vehicle 1, so the lower side (or the enlarged portion 36 side) of the valve body 34 plays a role like a pendulum weight, The foreign matter discharge port 27 can be reliably closed by swinging with the weight of the enlarged portions 36 and 36 of the valve body 34.

Further, in the second embodiment, as shown in FIG. 8, the enlarged portions 36 and 36 are formed with flange portions 38 and 38 extending forward of the vehicle in the outer green portions 37 and 37 in the vehicle width direction Y, respectively.
Thus, by forming the flange portions 38 and 38 extending forward of the vehicle in the outer green portions 37 and 37 of the enlarged portions 36 and 36, the air flowing in from the front of the vehicle is applied by the enlarged portions 36 and 36, and the enlarged portion The flanges 38 and 38 can catch the air hitting 36 and 36 so as not to escape out of the intake duct 23.
Thereby, the air flowing in from the front of the vehicle by the enlarged portions 36 and 36 and the flange portions 38 and 38 can be reliably received, and the valve body 34 can be reliably swung.

  The vehicle engine intake device according to the present invention can be applied to various vehicles.

DESCRIPTION OF SYMBOLS 1 Vehicle 6 Engine room 10 Power unit 11 Engine 12 Transmission 13 Radiator 17 Intake device 20 Air cleaner 23 Intake duct 25 Air intake 27 Foreign matter outlet 28 Air outlet 29 Air inlet pipe 30 Gap 31 Battery 32 Upper edge of foreign matter outlet 33 Valve shaft 34 Valve body 35 Outer peripheral part of valve body 36 Enlarged part 37 Outer edge part of enlarged part 38 Flange part

Claims (3)

  A radiator is disposed at the front of the vehicle, an engine and an air cleaner are disposed in an engine room behind the radiator, and an air intake opening that opens in front of the vehicle and a foreign matter discharge port that opens in the engine room are provided in the vehicle. An intake duct provided at the front end and the rear end in the front-rear direction is disposed above the radiator, and an air intake port through which air from the air cleaner is extracted between the air intake port and the foreign matter discharge port is provided in the intake air. In the vehicle engine intake device formed in the duct, the foreign matter discharge port is opened toward the rear of the vehicle, and swings around a valve shaft extending along the upper edge of the foreign matter discharge port. An intake device for a vehicle engine, wherein a valve body that opens the foreign matter discharge port by wind pressure is provided in the intake duct.   2. The intake device for a vehicle engine according to claim 1, wherein the valve body includes an enlarged portion that protrudes outward of the intake duct at an outer peripheral portion. 3.   The vehicle engine intake device according to claim 2, wherein a flange portion extending forward of the vehicle is formed in the outer green portion in the enlarged portion.

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