JP2004190644A - Intake manifold structure - Google Patents

Abstract

An object of the present invention is to effectively utilize a space in an engine room with a simple structure in which the number of parts is suppressed.
In an intake manifold structure having an intake manifold for supplying air to an engine and an air cleaner case disposed upstream of the intake manifold, the air cleaner case is disposed along the engine. At the same time, the intake manifold 6 is disposed so as to straddle the air cleaner case 3, one end 6 a of the intake manifold 6 is connected to an intake port of the engine, and the other end 6 b of the intake manifold 6 is supplied to the intake manifold 6. It is configured such that a throttle for controlling the air flow rate is connected.
[Selection diagram] FIG.

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an intake manifold structure, and more particularly, to an intake manifold structure that is very compact and excellent in space saving.
[0002]
[Prior art]
As shown in FIG. 6, a general engine intake system 100 is composed of various parts represented by an intake manifold 101, a throttle body 102, an air duct 103, an air cleaner 104, and the like. 105.
[0003]
However, since the space in the engine room 105 is limited, it has been conventionally desired to suppress the number of components of the intake system 100 and to efficiently utilize the space in the engine room 105.
Therefore, for example, Patent Document 1 discloses that an air cleaner 202 is disposed between an intake manifold 201 and an engine (not shown) as shown in FIGS. A technique for performing this is disclosed.
[0004]
[Patent Document 1]
JP-A-11-132119 [0005]
[Problems to be solved by the invention]
However, in the intake system 200 shown in the technique of Patent Document 1, although the air cleaner 202 is disposed between the engine and the intake manifold 201, the components such as the surge tank 203, the throttle 204, and the duct 205 are provided. Are arranged on the upper surface of the air cleaner 202, so that the size increases. That is, as shown in FIG. 8, which is a top view of the intake system 200 shown in FIG. 7, the surge tank 203 projects forward (in the direction of arrow A in FIG. 8) from the intake manifold 201, so that the surge It is not possible to make effective use of the allocated space.
[0006]
The present invention has been made in view of such a problem, and an object of the present invention is to provide an air intake device having a simple structure with a reduced number of parts and capable of effectively utilizing a space in an engine room. And
[0007]
[Means for Solving the Problems]
According to a first aspect of the present invention, there is provided an intake manifold structure including an intake manifold for supplying air to an engine, and an air cleaner case disposed upstream of the intake manifold. The intake manifold is arranged along the engine, and the intake manifold is arranged to straddle the air cleaner case. One end of the intake manifold is connected to an intake port of the engine, and the other end of the intake manifold is provided. Is connected to the throttle for controlling the flow rate of intake air supplied to the engine.
[0008]
Thus, by arranging the components of the intake manifold structure efficiently, it is possible to efficiently utilize the space of the engine room.
In the intake device according to a second aspect, in the configuration according to the first aspect, a surge tank is provided between the intake manifold and the air cleaner case, and the surge tank is formed integrally with the intake manifold. It is characterized by having.
[0009]
According to a third aspect of the present invention, in the intake device according to the first or second aspect, an air duct connecting the air cleaner case and the throttle is provided, and the air duct is provided on a side surface of the intake manifold. It is characterized by.
According to a fourth aspect of the present invention, in the air intake device according to the third aspect, the air cleaner case has a suction port for taking in air into the air cleaner case, and the suction port is connected to the surge tank. It is characterized in that it is arranged on the opposite side of the throttle arrangement position.
[0010]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an intake manifold structure according to an embodiment of the present invention will be described with reference to FIGS. 1 to 5. FIGS. 1 and 2 are schematic exploded perspective views, and FIG. 3 is a schematic view illustrating one side surface thereof. FIG. 4 is a schematic perspective view showing the overall configuration, and FIG. 5 is a schematic side view showing the other side.
[0011]
1, reference numeral 2 denotes an air filter for purifying air taken into an engine (see reference numeral 14 in FIG. 5), reference numeral 3 denotes an air cleaner case incorporating the air filter 2, and reference numeral 6 denotes intake air purified by the air filter 2. Is supplied to each cylinder of the engine, reference numeral 5 is a surge tank for temporarily storing intake air before the intake air flows into the intake manifold 6, reference numeral 4 is an air duct connecting the air cleaner case 3 and the surge tank 5, and reference numeral 13 is It is a throttle body (throttle) for adjusting the amount of intake air supplied to the engine.
[0012]
As shown in FIG. 3, the air cleaner case 3 is disposed on a front surface of the engine 14 along a vertical direction. The intake manifold 6 is disposed along the up-down direction of the engine 14 so as to straddle the air cleaner case 3. One end (upper end) 6 a is connected to an intake port (not shown) of the engine 14, and the other end (lower end) 6 b is disposed below the air cleaner case 3. 15 is fixed via a bracket 16.
[0013]
As shown in FIG. 1, a throttle body 13 is connected to a surge tank 5 formed at the other end 6b of the intake manifold 6. Here, the throttle body 13 is connected to the surge tank 5 along the direction of the cylinders of the engine 14, so that the thickness of the intake manifold 6 can be suppressed and the size thereof can be reduced. That is, as shown in FIG. 3, the surge tank 5 is disposed below the air cleaner case 3, and as shown in FIGS. 1 and 4, the surge tank 5 and the throttle body 13 are arranged along the cylinder row direction. because it is disposed adjacent, it can throttle body 13 is configured so as not to protrude forward from the forefront (see chain line X ₁ in FIG. 3) of the intake manifold 6. Thereby, the size of the intake manifold 6 can be made compact.
[0014]
Further, as shown in FIG. 1, an air duct 4 connecting the air cleaner case 3 and the throttle body 13 is provided on a side surface of the intake manifold 6. The air duct 4, as shown in FIG. 5, and in the form along the side profile of the intake manifold 6, so as little as possible protrudes forward from the front of the intake manifold 6 (see chain line in FIG. 5 X ₁₎ It is configured. Thereby, the size of the intake manifold 6 can be made compact.
[0015]
Here, the flow of the intake air will be described. As shown in FIG. 2, when the intake air is sucked into the air cleaner case 3 from the intake port 11 formed in the lower case 10 (see the arrow B in the figure), This intake air is purified by passing through the air filter 2 (see arrow C in the figure), and the purified intake air flows into the air duct 4 through an opening 12 formed in the side surface of the upper case 9 (FIGS. 2 and 4). (See middle arrow D).
[0016]
The intake air flowing into the air duct 4 is supplied to the surge tank 5 through the air duct 4 and the throttle body 13 as shown by an arrow E in FIG. The fuel is supplied to each cylinder of the engine through −2, 6-3 (see arrows F, G, H in the figure).
Next, the intake manifold 6 and the air cleaner case 3 will be described in detail. As shown in FIG. 2, the intake manifold 6 is a resin upper manifold (first manifold) divided into upper and lower parts in a direction along the flow of intake air. ) 7 and a lower manifold (second manifold) 8 made of resin. By welding these upper manifold 7 and lower manifold 8 to each other, as shown in FIG. 1, the number of air passages 6-1 and 6 (here, three) corresponding to the number of cylinders of the engine is provided. An intake manifold 6 having 2, 6-3 is formed, and a surge tank 5 integrated with the intake manifold 6 is formed.
[0017]
As shown in FIG. 2, the air cleaner case 3 also includes a resin upper case (first case) 9 and a resin lower case (second case) 10 which are vertically divided in a direction along the intake manifold 6. And two members. In addition, the lower manifold 8 and the upper case 9 are integrally formed, so that the components of the intake manifold 6 and the air cleaner case 3 can be shared.
[0018]
That is, in the present embodiment, three units of the intake manifold 6, the surge tank 5, and the air cleaner case 3 are formed by simply combining the three parts of the upper manifold 7, the lower manifold 8 (the upper case 9), and the lower case 10. It is possible to greatly contribute to the suppression of the number of parts. Then, by manufacturing these components with resin, it is possible to increase productivity and further contribute to weight reduction.
[0019]
As shown in FIG. 1, an insertion port 10 a into which the air filter 2 is inserted is formed on a side surface of the lower case 10, and a suction port for taking air into the air cleaner case 3 is provided on the opposite side of the insertion port 10 a. A mouth 11 is formed. The suction port 11 is disposed on the opposite side of the surge tank 5 from the throttle body 13, so that interference between the suction port 11 and the air duct 4 can be avoided. 21 can be easily inserted. The extension duct 21 is a ventilation path that connects a preferred air intake location and the intake port 11 according to the type of vehicle.
[0020]
The air filter 2 is detachably housed in the air cleaner case 3 as shown by an arrow J in FIG. 2 so that it can be easily pulled out and replaced.
The synthetic resin that is the material of the upper manifold 7, the lower manifold 8 (upper case 9), and the lower case 10 is a polyamide (nylon) resin, but is not limited to this resin.
[0021]
Since the intake device as one embodiment of the present invention is configured as described above, the following operations and effects can be obtained.
As shown in FIG. 2, since the lower manifold 8 and the upper case 9 are the same parts, the parts can be shared between the intake manifold 6 and the air cleaner case 3.
[0022]
In other words, the second manifold (lower manifold) 8 and the first case (upper case) 9 are used as common components to reduce the number of parts, reduce costs, and employ a divided structure that is easy to process. By doing so, it is possible to contribute to improvement in productivity.
In addition, the three components of the upper manifold 7, the lower manifold 8 (the upper case 9), and the lower case 10 make it possible to form three units of the intake manifold 6, the surge tank 5, and the air cleaner case 3. It is possible to achieve a significant reduction in the number of points and to suppress the cost.
[0023]
Further, as shown in FIG. 5, by providing the air duct 4 on the side surface of the intake manifold 6, it is possible to contribute to downsizing, and it is possible to efficiently utilize the space in the engine room.
As shown in FIG. 3, the air cleaner case 3 is disposed along the side surface of the engine 14 in the cylinder row direction, and the intake manifold 6 is disposed so as to straddle the air cleaner case 3 up and down. Since the surge tank 5 formed at the other end 6 b of the intake manifold 6 is formed below the air cleaner case 3 and at a position where it does not interfere with the air cleaner case 3, the surge tank 5 is located at the forefront of the intake manifold 6. It can be configured so as not to protrude from the reference chain line X ₁₎ in FIG. Further, since the throttle body 13 is provided below the air cleaner case 3 and adjacent to the surge tank 5, the throttle body 13 does not protrude from the forefront of the intake manifold 6.
[0024]
As a result, the thickness of the intake system including the intake manifold 6 can be suppressed to reduce the size, and the space in the engine room can be effectively used. Further, by disposing the intake port 11 for taking in the air into the air cleaner case 3 on the opposite side of the position where the throttle 13 is disposed across the surge tank 4, the intake of air by the throttle 13 is not hindered. The intake duct 21 can be easily inserted.
[0025]
Note that the present invention is not limited to the above-described embodiment, and can be variously modified and implemented without departing from the spirit of the present invention.
For example, in this embodiment, the case where the engine has three cylinders has been described. However, the intake manifold structure of the present invention may be applied to an engine having less than three cylinders or an engine having four or more cylinders. Is possible.
[0026]
Further, in the present embodiment, the intake manifold 6 and the air filter case 3 are formed of resin, but the material is not limited to resin. However, if these parts are formed of resin, the weight reduction can be promoted and the workability can be improved, so that there is a great merit.
[0027]
【The invention's effect】
As described in detail above, according to the intake manifold structure of the present invention, the space in the engine room can be effectively used with a simple structure in which the number of parts is suppressed.
In other words, it is possible to arrange the intake manifold so as to straddle the air cleaner case and to arrange the other end of the intake manifold so as not to interfere with the air cleaner case, and to connect and fix the throttle to this other end. As a result, the thickness of the intake manifold is suppressed, thereby contributing to downsizing, and the space in the engine room can be effectively used (claim 1).
[0028]
Further, by integrally forming the surge tank with the intake manifold, it is possible to greatly reduce the number of parts and to suppress the cost (claim 2).
Further, by providing the air duct on the side surface of the intake manifold, it is possible to contribute to further downsizing, and it is possible to efficiently utilize the space in the engine room (claim 3).
[0029]
Further, by arranging the intake port on the opposite side of the throttle arrangement position across the surge tank, it is possible to enhance the intake efficiency and to easily insert the extended intake duct (claim 4).
[Brief description of the drawings]
FIG. 1 is a schematic exploded perspective view of an intake device according to an embodiment of the present invention.
FIG. 2 is a schematic exploded perspective view of the intake device according to the embodiment of the present invention.
FIG. 3 is a schematic side view showing one end of an intake device according to one embodiment of the present invention.
FIG. 4 is a schematic perspective view of an intake device showing an overall configuration of the present invention.
FIG. 5 is a schematic side view showing the other end of the intake device according to one embodiment of the present invention.
FIG. 6 is a schematic perspective view of a conventional intake system.
FIG. 7 is a schematic perspective view of a conventional intake system.
FIG. 8 is a schematic top view of a conventional intake system.
[Explanation of symbols]
3 Air cleaner case 4 Air duct 5 Surge tank 6 Intake manifold 7 Upper manifold (1st manifold)
8 Lower manifold (second manifold)
9 Upper case (first case)
10. Lower case (second case)
11 Inlet 14 Engine

Claims (4)

In an intake manifold structure including an intake manifold that supplies air to an engine and an air cleaner case disposed upstream of the intake manifold,
The air cleaner case is disposed along the engine,
The intake manifold is disposed so as to straddle the air cleaner case, one end of the intake manifold is connected to an intake port of the engine, and the other end of the intake manifold has an intake air flow supplied to the engine. An intake manifold structure, characterized in that a throttle for controlling the intake air is connected. A surge tank is provided between the intake manifold and the air cleaner case,
The intake manifold structure according to claim 1, wherein the surge tank is formed integrally with the intake manifold. Having an air duct connecting the air cleaner case and the throttle,
3. The intake manifold structure according to claim 1, wherein the air duct is provided on a side surface of the intake manifold. The air cleaner case has a suction port for taking air into the air cleaner case,
4. The intake manifold structure according to claim 3, wherein the suction port is provided on the opposite side of the throttle tank from the surge tank.

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