JP2021173252A - Intake device of internal combustion engine - Google Patents

Abstract

To provide an intake device of an internal combustion engine, which enables lowering of intake temperature thereby enabling improvement of the charging efficiency of the internal combustion engine, and consequently enables improvement of the output performance and the fuel economy of the internal combustion engine, even if an opening area for taking air into an engine room is reduced.SOLUTION: An intake device 10 comprises a volume portion 17 communicating with an intake duct 11 by a communication path 16a, the volume portion 17 comprises a resonator 13 installed near an air cleaner 12. The volume portion 17 has a front wall portion 17A extending in a cylinder row direction of an engine 2, and in the front wall portion 17A, a right end portion 17a separated from the air cleaner 12 is protruded frontward rather than a left end portion 17b near the air cleaner 12.SELECTED DRAWING: Figure 1

Description

The present invention relates to an intake device for an internal combustion engine.

As an intake device for an internal combustion engine mounted on a vehicle, the one described in Patent Document 1 is known. In the intake device described in Patent Document 1, an air cleaner is installed above the front side of the engine, and a downstream end portion of the intake duct is connected to one side surface of the air cleaner.

A resonator is attached to one side of the air cleaner, and the resonator extends forward from one side of the air cleaner and is connected in the middle of the intake duct.

JP-A-2015-47892

By the way, in recent four-wheeled vehicles, air resistance is reduced by reducing the opening area of the front bumper to minimize the amount of air taken into the engine room.

However, if the amount of air taken into the engine room is minimized, the temperature inside the engine room rises, and the temperature of the intake air flowing through the intake device rises.

In the conventional intake device, it is not considered to lower the temperature of the intake air flowing through the intake device when the opening area of the front bumper is reduced, so that the density of the intake air introduced into the engine becomes low and the internal combustion engine There is a risk that the filling efficiency of the internal combustion engine will decrease, and the output performance and fuel efficiency of the internal combustion engine will deteriorate.

The present invention has been made by paying attention to the above circumstances, and even when the opening area for taking in air into the engine room is reduced, the intake air temperature is lowered to improve the filling efficiency of the internal combustion engine. It is an object of the present invention to provide an intake device of an internal combustion engine which can be improved and can improve the output performance and fuel efficiency of the internal combustion engine.

In the present invention, an intake duct in which a cylinder row is installed above an internal combustion engine extending in the vehicle width direction and sucks air from an intake port provided at an upstream end, and an intake duct installed above the internal combustion engine and from the intake duct. An air cleaner for purifying the intake air to be introduced, a resonator having a volume portion communicating with the intake duct by a communication portion, and the volume portion installed in the vicinity of the air cleaner, and a resonator located behind the resonator. It is provided behind the internal combustion engine and includes an intake manifold into which the intake air purified by the air cleaner is introduced, and the volume portion has a front wall portion extending in the cylinder row direction of the internal combustion engine and is in front of the internal combustion engine. The wall portion is characterized in that one end portion away from the air cleaner protrudes forward of the vehicle from the other end portion approaching the air cleaner.

As described above, according to the present invention, even when the opening area for taking in air into the engine room is reduced, the intake air temperature can be lowered to improve the filling efficiency of the internal combustion engine, and the output performance of the internal combustion engine can be improved. And fuel efficiency can be improved.

FIG. 1 is a front view of an internal combustion engine provided with an intake device according to an embodiment of the present invention. FIG. 2 is a view of an internal combustion engine provided with an intake device according to an embodiment of the present invention as viewed diagonally to the right from the front. FIG. 3 is a right side view of an internal combustion engine provided with an intake device according to an embodiment of the present invention. FIG. 4 is a plan view of an internal combustion engine provided with an intake device according to an embodiment of the present invention.

The intake device of the internal combustion engine according to the embodiment of the present invention includes an intake duct in which a cylinder row is installed above the internal combustion engine extending in the vehicle width direction and sucks air from an intake port provided at an upstream end portion, and internal combustion. An air cleaner installed above the engine that purifies the intake air introduced from the intake duct, a resonator that has a volume part that communicates with the intake duct by a communication part, and a volume part that is installed near the air cleaner, and a resonator It is installed behind the internal combustion engine so as to be located rearward, and includes an intake manifold into which intake air purified by an air cleaner is introduced, and the volume portion has a front wall portion extending in the cylinder row direction of the internal combustion engine. One end of the front wall that separates from the air cleaner projects forward of the vehicle from the other end that approaches the air cleaner.

As a result, the intake device of the internal combustion engine according to the embodiment of the present invention lowers the intake temperature to improve the filling efficiency of the internal combustion engine even when the opening area for taking in air into the engine room is reduced. It can be improved, and the output performance and fuel efficiency of the internal combustion engine can be improved.

Hereinafter, the intake device of the internal combustion engine according to the embodiment of the present invention will be described with reference to the drawings.
1 to 4 are views showing an intake device of an internal combustion engine according to an embodiment of the present invention. In FIGS. 1 to 4, the up-down, front-rear, left-right directions are based on the internal combustion engine installed in the vehicle, the front-rear direction of the vehicle is the front-rear direction, the left-right direction of the vehicle (width direction of the vehicle) is the left-right direction, and the vehicle. The vertical direction (the height direction of the vehicle) is the vertical direction.

First, the configuration will be described.
In FIG. 1, an engine 2 as an internal combustion engine is installed in the engine room 1A of the vehicle 1. As shown in FIG. 3, the engine room 1A is separated from the vehicle interior (not shown) by the dash panel 1B (see FIG. 3), and the upper portion is covered with the front hood 1C.

The front part of the engine room 1A is closed by the front bumper 1D, and the running wind is taken into the engine room 1A through an opening such as a front grill formed in the front bumper 1D (not shown).

As shown in FIGS. 1 to 3, the engine 2 includes a cylinder block 3, a cylinder head 4 provided on the upper part of the cylinder block 3, a cylinder head cover 5 provided on the upper part of the cylinder head 4, and a cylinder block 3. And a chain cover 6 attached to the right side surface of the cylinder head 4.

The cylinder block 3 is provided with a plurality of cylinders (not shown), and the cylinders are installed side by side in the width direction of the vehicle 1 (hereinafter, referred to as the vehicle width direction). The cylinder arrangement direction (left-right direction) is referred to as the cylinder row direction L. The engine 2 of this embodiment is a transverse engine.

Each cylinder contains a piston (not shown), and the piston is connected to a crank shaft (not shown) via a connecting rod (not shown). The piston reciprocates in the cylinder to rotate the crank shaft via the connecting rod.

The cylinder head 4 is formed with a plurality of intake ports and a plurality of exhaust ports (not shown). Each intake port communicates with the cylinder to introduce intake air into the cylinder. As shown in FIG. 1, an exhaust manifold 4A is formed in front of the cylinder head 4.

The exhaust manifold 4A communicates with a plurality of cylinders through an exhaust port, collects exhaust gas discharged from the plurality of cylinders, and discharges the exhaust gas from the exhaust port 4a to a catalytic converter (not shown).

The chain cover 6 covers a chain wound around a crank sprocket of a crankshaft (not shown), an intake sprocket of an intake camshaft, and an exhaust sprocket of an exhaust camshaft.

As shown in FIGS. 1 and 4, an intake device 10 is installed above the cylinder head cover 5, and the intake device 10 includes an intake duct 11, an air cleaner 12, a resonator 13, an air outlet hose 14, and an intake manifold 15. I have.

As shown in FIG. 4, the intake duct 11 extends in the cylinder row direction L of the engine 2. An intake port 11a that opens toward the right side (one side) of the cylinder row direction L is provided at the right end of the intake duct 11 in the cylinder row direction L (see FIGS. 2 and 3). The intake port 11a is provided at the upstream end of the intake duct.

When the engine 2 is viewed from above the vehicle 1, the intake duct 11 has a U-shape that curves rearward from the intake port 11a, extends from the rear end in the bending direction in the cylinder row direction L, and then curves forward. It is formed.

The intake duct 11 takes in the traveling wind taken into the engine room 1A from the front of the vehicle 1 through the intake port 11a. Specifically, the intake duct 11 sucks in outside air by the negative pressure of the engine 2.

A bracket 25 is attached to the intake duct 11, and the intake duct 11 is reinforced by the bracket 25 to maintain a curved shape. Since the intake duct 11 of this embodiment is formed in a U shape, the dimension of the intake duct 11 in the cylinder row direction L can be shortened.

The intake duct 11 may extend linearly in the cylinder row direction L. That is, the intake duct 11 may extend in the cylinder row direction L regardless of whether it is U-shaped or linear.

The resonator 13 has a communication pipe portion 16 and a box-shaped volume portion 17. The communication pipe portion 16 connects the intake duct 11 and the volume portion 17, and a communication passage 16a for communicating the intake duct 11 and the volume portion 17 is formed inside the communication pipe portion 16.

The volume portion 17 is installed above the cylinder head cover 5, behind the intake duct 11, and in the vicinity of the air cleaner 12.

The resonator 13 reduces intake noise by the volume portion 17 by introducing intake air from the intake duct 11 through the communication passage 16a into the volume portion 17. The communication pipe portion 16 having the communication passage 16a of the present embodiment constitutes the communication portion of the present invention.

The air cleaner 12 is installed above the cylinder head cover 5 and is located on the left side, which is one side of the cylinder row direction L with respect to the volume portion 17, so as to line up with the intake duct 11 and the volume portion 17 in the cylinder row direction L. is set up.

A downstream end portion 11b of the intake duct 11 is connected to the front side of the right side surface 12a of the air cleaner 12 in the cylinder row direction L, and intake air is introduced into the air cleaner 12 from the intake duct 11.

An air cleaner element (not shown) is provided inside the air cleaner 12, and foreign matter such as dust contained in the intake air introduced into the air cleaner 12 from the intake duct 11 is removed by the air cleaner element.

As shown in FIG. 4, the intake manifold 15 has a box-shaped surge tank 18 and branch pipes 19A, 19B, 19C, and is installed behind the engine 2.

As shown in FIG. 3, the front portion of the surge tank 18 overlaps the cylinder head cover 5 in the front-rear direction, and the rear portion of the surge tank 18 is located behind the cylinder head cover 5. The surge tank 18 extends in the cylinder row direction L (see FIG. 4), and is installed behind the front wall portion 17A of the volume portion 17.

As shown in FIG. 4, the air outlet hose 14 connects the air cleaner 12 and the surge tank 18, and the air outlet hose contains the intake air introduced into the air cleaner 12 from the intake duct 11 and purified in the surge tank 18. Introduced through 14.

The branch pipes 19A, 19B, and 19C extend from the surge tank 18 to the rear portion of the engine 2, and the downstream end portion 19b in the extending direction is connected to the cylinder head 4.

Specifically, as shown in FIG. 3, in the branch pipes 19A, 19B, 19C, the downstream end in the direction in which the intake air flows is connected to the rear part of the cylinder head 4 (however, FIG. 3 shows the branch pipe. Only 19C is shown), protruding upward from the upper surface 5a of the cylinder head cover 5 from the downstream end, and the upstream end 19u is connected to the surge tank 18.

Here, upstream and downstream represent upstream and downstream with respect to the direction in which the intake air flows. The branch pipes 19A, 19B, 19C are downstream with respect to the intake port 11a, and the intake port 11a side is upstream with respect to the branch pipes 19A, 19B, 19C.

The intake duct 11, the resonator 13, and the intake manifold 15 are installed in the order of the intake duct 11, the resonator 13, and the intake manifold 15 from the front side to the rear side, and are arranged in the front-rear direction.

A branch passage (not shown) is formed inside the branch pipes 19A, 19B, and 19C, and the branch passage communicates with the intake port of the cylinder head 4, respectively.

The intake air introduced from the air outlet hose 14 into the surge tank 18 is distributed to each cylinder from the branch passage through the intake port.

As shown in FIG. 4, a valve body 20 is provided between the air outlet hose 14 and the surge tank 18, and the throttle valve 20A is housed in the valve body 20.

The throttle valve 20A adjusts the amount of intake air sent to the cylinder of the engine 2 by varying the passage cross-sectional area of the air outlet hose 14.

As shown in FIGS. 1 and 2, the intake device 10 includes a guide member 21, and the guide member 21 has a bottom wall 22 and a vertical wall 23.

The bottom wall 22 is located below the intake port 11a of the intake duct 11, extends to the front side of the intake port 11a and to the right side of the intake port 11a in the cylinder row direction L.

The vertical wall 23 extends upward from the right end portion 22a of the bottom wall 22 in the cylinder row direction L, and the rear portion faces the intake port 11a in the cylinder row direction L (see FIG. 4).

The guide member 21 guides the traveling wind attached to the engine room 1A from the front of the vehicle 1 to the intake port 11a and the resonator 13 by the bottom wall 22 and the vertical wall 23.

As shown in FIGS. 1 and 2, the volume portion 17 has a front wall portion 17A extending in the cylinder row direction L of the engine 2. As shown in FIG. 4, in the front wall portion 17A, the right end portion 17a of the cylinder row direction L away from the air cleaner 12 in the cylinder row direction L approaches the air cleaner 12 in the cylinder row direction L from the left end portion 17b of the cylinder row direction L. Also protrudes forward.

Specifically, the front wall portion 17A is curved rearward from the right end portion 17a toward the left. The volume portion 17 and the air cleaner 12 are arranged in the cylinder row direction L so as to approach the cylinder row direction L, and the front wall portion 17A is located behind the front end 12f of the air cleaner 12 and in front of the rear end 12r. doing.

The right end portion 17a of the present embodiment constitutes one end of the front wall portion of the present invention, and the left end portion 17b constitutes the other end of the front wall portion of the present invention.

As shown in FIG. 1, the intake duct 11 is installed in front of the front wall portion 17A, faces the lower portion of the front wall portion 17A in the front-rear direction, and extends in the cylinder row direction L, and the engine 2 The upper portion of the front wall portion 17A is visible from the front when viewed from the front.

Next, the effect of the intake device 10 of this embodiment will be described.
The intake device 10 of this embodiment is installed above the cylinder head cover 5 of the engine 2 in which the cylinder row extends in the vehicle width direction, and has an intake duct 11 for sucking air from an intake port 11a provided at the upstream end, and a cylinder head cover. It has an air cleaner 12 which is installed above 5 and purifies the intake air introduced from the intake duct 11.

Further, the intake device 10 has a volume portion 17 communicating with the intake duct 11 by a communication passage 16a, and the volume portion 17 is located near the air cleaner 12 and the resonator 13 and the engine so as to be located behind the resonator 13. It is installed behind 2 and includes an intake manifold 15 into which intake air purified by an air cleaner 12 is introduced.

The volume portion 17 has a front wall portion 17A extending in the cylinder row direction L of the engine 2. In the front wall portion 17A, the right end portion 17a away from the air cleaner 12 projects forward from the left end portion 17b approaching the air cleaner 12. There is.

As a result, as shown in FIG. 4, the low-temperature running wind W taken into the engine room 1A from the front of the vehicle 1 can be guided to the air cleaner 12 side along the curved surface of the front wall portion 17A.

Therefore, even when the opening area of the front bumper 1D for taking the running wind W (air) into the engine room 1A, that is, the opening area of the front grill or the like is reduced, the front wall portion 17A causes the air cleaner 12 side. The air cleaner 12 can be cooled by the traveling wind W guided by the air cleaner 12.

Therefore, the temperature of the intake air flowing through the air cleaner 12, that is, the intake air temperature can be lowered to increase the density of the intake air introduced into the cylinder of the engine 2. As a result, the filling efficiency of the intake air introduced into the cylinder of the engine 2 can be improved, and the output performance and the fuel consumption of the engine 2 can be improved.

That is, in the intake device 10 of the present embodiment, the right end portion 17a of the front wall portion 17A is projected forward from the left end portion 17b, and the shape of the front wall portion 17A is made into a shape capable of inducing the traveling wind W to the air cleaner 12. As a result, the output performance and fuel efficiency of the engine 2 can be improved while minimizing the amount of air taken into the engine room 1A and reducing the air resistance.

Further, the volume portion 17 and the air cleaner 12 are arranged in the cylinder row direction L so as to approach the cylinder row direction L, and the front wall portion 17A is behind the front end 12f of the air cleaner 12 and in front of the rear end 12r. Is located in.

As a result, the traveling wind W guided by the front wall portion 17A can be reliably applied to the right side surface 12a of the air cleaner 12, and the air cleaner 12 can be reliably cooled by the traveling wind W.

In addition to this, the intake device 10 of the present embodiment can guide the traveling wind W to the air cleaner 12 by devising the shape of the resonator 13, so that another component such as an air guide is added to the intake device 10. You can eliminate the need to do. Therefore, it is possible to prevent the number of parts of the intake device 10 from increasing, and it is possible to prevent the manufacturing cost of the intake device 10 from increasing.

Further, according to the intake device 10 of the present embodiment, the intake duct 11 is installed in front of the front wall portion 17A, faces the lower portion of the front wall portion 17A in the front-rear direction, and is in the cylinder row direction L. It is extending.

As a result, the intake duct 11 can be cooled by the low-temperature running wind W taken into the engine room 1A from the front of the vehicle 1, and the temperature of the intake air flowing through the intake duct 11 can be lowered.

Further, the traveling wind W can be reliably guided to the air cleaner 12 from the upper portion of the front wall portion 17A. Therefore, the intake air cooled by the intake duct 11 and introduced into the air cleaner 12 can be reliably cooled by the traveling wind W guided by the front wall portion 17A, and the intake air temperature can be further lowered.

As a result, the filling efficiency of the intake air introduced into the cylinder of the engine 2 can be improved more effectively, and the output performance and the fuel consumption of the engine 2 can be improved more effectively.

Further, according to the intake device 10 of the present embodiment, the downstream end portion 11b of the intake duct 11 is connected to the front side of the right side surface 12a of the air cleaner 12.

As a result, the traveling wind W guided from the front wall portion 17A to the air cleaner 12 can be applied to the right side surface 12a of the air cleaner 12 while avoiding the intake duct 11. Therefore, the air cleaner 12 can be reliably cooled by the traveling wind W guided by the front wall portion 17A, and the intake air temperature can be reliably lowered.

Here, when the downstream end portion 11b of the intake duct 11 is connected to the front surface of the air cleaner 12, the intake duct 11 protrudes in front of the air cleaner 12, and the installation space of the intake device 10 increases in the front-rear direction.

According to the intake device 10 of the present embodiment, since the downstream end portion 11b of the intake duct 11 is connected to the front side of the right side surface 12a of the air cleaner 12, the intake duct 11 protrudes in front of the air cleaner 12 and the intake device 10 It is possible to prevent the installation space from becoming large in the front-rear direction.

The downstream end 11b of the intake duct 11 is not limited to the one connected to the front side of the right side surface 12a of the air cleaner 12. That is, since the downstream end portion 11b of the intake duct 11 may be connected to the front side of the air cleaner 12, it may be connected to the front surface of the air cleaner 12.

In this way, the traveling wind W induced by the front wall portion 17A can be applied to the entire right side surface 12a of the air cleaner 12, and the intake air temperature can be further lowered.

Further, according to the intake device 10 of the present embodiment, the air cleaner 12 is installed on the left side of the volume portion 17 in the cylinder row direction L so as to be aligned with the volume portion 17 in the cylinder row direction L.

As a result, the traveling wind W can be guided from the upper portion of the front wall portion 17A to the upper portion of the air cleaner 12.

Since the temperature inside the engine room 1A is higher in the upper part than in the lower part, the temperature is higher than the lower part by guiding the traveling wind W from the upper part of the front wall portion 17A to the upper part of the air cleaner 12. The upper part of the air cleaner 12 can be effectively cooled.

Therefore, the intake air temperature of the air cleaner 12 can be lowered more effectively. As a result, the filling efficiency of the intake air introduced into the cylinder of the engine 2 can be improved more effectively, and the output performance and the fuel consumption of the engine 2 can be improved more effectively.

The air cleaner 12 may be installed on the right side of the volume portion 17 in the cylinder row direction L so as to be aligned with the volume portion 17 in the cylinder row direction L.

Although the embodiments of the present invention have been disclosed, it is clear that some skilled in the art can make changes without departing from the scope of the present invention. All such modifications and equivalents are intended to be included in the following claims.

1 ... vehicle, 2 ... engine (internal combustion engine), 10 ... intake device, 11 ... intake duct, 11a ... intake port, 11b ... downstream end, 12 ... air cleaner , 13 ... resonator, 15 ... intake manifold, 16 ... communication pipe part (communication part), 17 ... volume part, 17A ... front wall part, 17a ... right end part (front wall) One end of the part), 17b ... Left end (the other end of the front wall)

Claims (4)

An intake duct where the cylinder row is installed above the internal combustion engine extending in the vehicle width direction and sucks air from the intake port provided at the upstream end,
An air cleaner installed above the internal combustion engine to purify the intake air introduced from the intake duct.
A resonator having a volume portion communicating with the intake duct by a communication portion and the volume portion is installed in the vicinity of the air cleaner.
It is provided with an intake manifold installed behind the internal combustion engine so as to be located behind the resonator and into which intake air purified by the air cleaner is introduced.
The volume portion has a front wall portion extending in the cylinder row direction of the internal combustion engine.
The front wall portion is an intake device for an internal combustion engine, characterized in that one end portion away from the air cleaner projects forward of the vehicle from the other end portion approaching the air cleaner. The first aspect of claim 1, wherein the intake duct is installed in front of the front wall portion, faces the lower portion of the front wall portion in the front-rear direction, and extends in the cylinder row direction. Internal combustion engine intake system. The intake device for an internal combustion engine according to claim 1 or 2, wherein the downstream end portion of the intake duct is connected to the front side of the air cleaner. Claims 1 to 3 are characterized in that the air cleaner is installed on one side or the other side in the cylinder row direction with respect to the volume portion so as to be aligned with the volume portion in the cylinder row direction. The intake device for an internal combustion engine according to any one of the above items.

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