JP3593836B2 - Engine intake resonator - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an intake resonator of an engine, in particular, a branch portion where a branch passage branches from an intake passage is provided in the intake resonator, the number of mounting brackets and the like can be reduced, the cost can be reduced, and the mounting rigidity can be reduced. The present invention relates to an intake resonator of an engine that can reduce the weight and improve the weight performance.
[0002]
[Prior art]
In some engines, an intake resonator having a large volume is provided in an intake system, and intake noise is reduced by the intake resonator.
[0003]
[Problems to be solved by the invention]
By the way, in a conventional intake resonator of an engine, as shown in FIGS. 16 and 17, an air cleaner (not shown) is located on the upstream side of the intake passage 114 of the engine (not shown), and is shown on the downstream side of the intake passage 114. A branch passage 116 is provided in the intake passage 114 between the air cleaner and the intake manifold.
[0004]
A branch pipe 122 constituting the branch passage 116 is provided in communication with the intake resonator 118 via a connection hose 132, and both ends of the connection hose 132 are fixed by clamps 134.
[0005]
Reference numeral 112 is an intake pipe of the engine, 136 is an intake pipe mounting bracket for mounting the intake pipe, 138 is an intake pipe mounting bolt for fixing the intake pipe 112, 140 is an intake resonator mounting bracket for mounting the intake resonator, 142. Is an intake resonator mounting bolt for fixing the intake resonator 118.
[0006]
As a result, the number of parts such as connecting hoses and clamps is large, and the cost is large, which is economically disadvantageous, and the workability of mounting the intake resonator is poor, and the weight is large, which is disadvantageous in practical use. There is.
[0007]
In addition, as shown by the hatched portion in FIG. 17, a dead space is formed between the intake pipe 112 and the intake resonator 118, so that there is a disadvantage that space efficiency is poor.
[0008]
Further, by disposing the intake resonator 118 from the intake pipe 112 via the branch pipe 122 and the connection hose 132, the assembled state of the intake resonator 118 when the assembly is completed, that is, as shown in FIG. In this case, the protrusion L of the intake resonator 118 becomes large and becomes sensitive to vibration, and it is necessary to increase the rigidity of the intake resonator mounting bracket and the intake resonator.
[0009]
Furthermore, since the amount L of the intake resonator 118 protruding from the intake pipe 112 becomes large, it is necessary to attach the intake resonator to the vehicle body, so that the number of man-hours in the main line increases, and the cost increases. There is a disadvantage that it is economically disadvantageous.
[0010]
[Means for Solving the Problems]
Therefore, in order to eliminate the above-mentioned disadvantage, the present invention locates an air cleaner on the upstream side of the intake passage of the engine, and locates the intake manifold on the downstream side of the intake passage. An intake pipe which forms a part of the intake passage, wherein the intake resonator is mounted on an upper surface of the engine, and the intake pipe comprises: And a branch pipe which is connected to the intake pipe and constitutes the branch passage. The branch pipe is disposed inside the intake resonator, and the intake pipe is curved in a U-shape as viewed from the top of the engine. Is opened to one side of the intake resonator.
[0011]
BEST MODE FOR CARRYING OUT THE INVENTION
With the invention described above, when forming the intake resonator, a branch portion where the branch passage branches from the intake passage is provided in the intake resonator, the number of mounting brackets and the like is reduced, the cost is reduced, and The mounting rigidity has been reduced, and the weight performance has also been improved. In addition, the intake resonator is mounted directly on the top surface of the engine, reducing man-hours on the main line during installation, eliminating dead space due to the intake resonator, and effectively using the space.
[0012]
【Example】
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
[0013]
1 to 15 show an embodiment of the present invention. 3 to 5, reference numeral 2 denotes an engine.
[0014]
The engine 2 is mounted on a cylinder block 4, a cylinder head 6 mounted on an upper surface of the cylinder block 4, an oil pan 8 mounted on a lower surface side of the cylinder block 4, and mounted on an upper surface of the cylinder head 6. And a cylinder head cover 10.
[0015]
An intake pipe 12 and an intake manifold (not shown) are provided in an intake system of the engine 2, and a part of an intake passage 14 is formed therein.
[0016]
An air cleaner (not shown) is disposed upstream of the intake passage 14, and an intake manifold is disposed downstream of the intake passage 14.
[0017]
Further, a branch passage 16 is provided in the intake passage 14 between the air cleaner and the intake manifold, and an intake resonator 18 is provided in communication with the intake passage 14 through the branch passage 16.
[0018]
At this time, the intake resonator 18 is attached to the upper surface of the engine 2 as is apparent from FIGS. 3 to 5, and the intake pipe 12 forming a part of the intake passage 14 is connected to the intake pipe 12. The branch pipe 22 forming the branch passage 16 and the branch pipe 22 are disposed inside the intake resonator 18, and the intake pipe 12 is curved in a U-shape as viewed from the upper surface of the engine 2. The outlet portion 12b is configured to open to one side of the intake resonator 18.
[0019]
More specifically, as shown in FIG. 1, a branch pipe 22 constituting a branch passage 16 is connected and provided in the middle of the intake pipe 12 constituting a part of the intake passage 14, and the intake pipe 12 is drawn into the intake resonator 18. The branch 20 of the branch pipe 22 with respect to the intake pipe 12, that is, the branch 20 between the intake pipe 12 and the branch pipe 22 is located in the intake resonator 18.
[0020]
When the branch portion 20 between the intake pipe 12 and the branch pipe 22 is located in the intake resonator 18, the internal branch pipe 22 is connected to the U-shaped circumferential direction of the intake pipe 12 as is apparent from FIG. It is provided curved.
[0021]
Here, an example will be described with reference to the manufacturing drawings of FIGS. 6 to 15. As shown in FIGS. 6 to 12, the intake resonator 18 is integrally formed into a substantially box shape with resin (vibration, hot plate, welding, etc.). Then, the volume 18A is secured inside, and the first mounting portion 24 for mounting the intake resonator 18 is provided outside (left side in FIG. 6).
[0022]
When the intake pipe 12 is positioned in the intake resonator 18, as shown in FIGS. 6 to 8 and FIGS. 10 to 12, a cross section U is taken from one side (upper side in FIG. 12) to a substantially central portion of the intake resonator 18. The intake pipe 12 is drawn in the shape of a letter, the inlet 12a and the outlet 12b are opened to one side of the intake resonator 18, and the intake pipe 12 is located on one side on the right side in FIG.
[0023]
At this time, the branch pipe 22 is connected to the lowermost portion of the intake pipe 12, that is, as is apparent from FIG. Is located in the intake resonator 18.
[0024]
As shown in FIG. 12, the intake pipe 12 is disposed on one side (the right side in FIG. 12) of the intake resonator 18, and the branch pipe 22 is formed as shown in FIG. 12, a curved portion is provided on the other side in the intake resonator 18, and the outer portion corresponding to the curved portion is provided with a portion for mounting the intake resonator 18 as shown in FIGS. 7, 12, and 13. Is provided.
[0025]
Next, the operation will be described.
[0026]
When arranging the intake resonator 18 in the intake system of the engine 2, the intake resonator 18 is directly mounted on the upper surface of the engine 2 to eliminate the dead space between the intake pipe 12 and the intake resonator 18 as in the related art. You.
[0027]
Thereby, the intake pipe 12 constituting a part of the intake passage 14 and the branch pipe 22 connected to the intake pipe 12 and constituting the branch passage 16 are disposed inside the intake resonator 18. Thus, as is clear from the first and second mounting portions 24 and 26, the number of mounting brackets and the like can be reduced as compared with the conventional one, the cost can be reduced, and it is economically advantageous. Thus, the mounting rigidity can be reduced, and the weight performance can be improved.
[0028]
Further, since the intake resonator 18 can be directly mounted on the upper surface of the engine 2, the number of steps on the main line at the time of mounting can be reduced, which is practically advantageous.
[0029]
Further, since the branch passage 16 is provided inside the intake resonator 18, a dead space between the intake pipe 12 and the intake resonator 18 as in the related art can be eliminated, and the space can be effectively used.
[0030]
Furthermore, since the branch pipe 22 can be provided inside the intake resonator 18, the size can be reduced, the space can be effectively used, and the vibration resistance can be improved.
[0031]
When the branch 20 between the intake pipe 12 and the branch pipe 22 is located in the intake resonator 18, the branch pipe 22 connected to the U-shaped curved portion of the intake pipe 12 is connected to the U-shaped section of the intake pipe 12. Is curved in the circumferential direction, so that the flow of intake air passing through the branch portion 20 can be made smooth, which is practically advantageous.
[0032]
The present invention is not limited to the above-described embodiment, and various modifications can be made.
[0033]
For example, in the embodiments of the present invention, the shapes of the intake pipe and the branch pipe in the intake resonator have been described with reference to the manufacturing drawings. However, the intake pipe and the branch pipe may have shapes other than those described above.
[0034]
【The invention's effect】
As described above in detail, according to the present invention, the air cleaner is located upstream of the intake passage of the engine, the intake manifold is located downstream of the intake passage, and the branch passage is provided in the middle of the intake passage between the air cleaner and the intake manifold. In the intake resonator of the engine which is connected to the intake passage by this branch passage, the intake resonator is mounted on the upper surface of the engine, and the intake pipe constituting a part of the intake passage, and the branch passage connected to this intake pipe, Since the branch pipe and the constituent branch pipe are arranged inside the intake resonator, the intake pipe is curved in a U shape when viewed from the top of the engine, and the inlet and the outlet are opened to one side of the intake resonator. Compared to the conventional one, the number of mounting brackets and the like can be reduced, the cost can be reduced, and it is economically advantageous. , It is possible to reduce the mounting rigidity, yet may also improve weight performance. Further, since the intake resonator can be directly mounted on the upper surface of the engine, the number of steps on the main line at the time of mounting can be reduced, which is practically advantageous. Further, since the branch passage is provided inside the intake resonator, the dead space due to the conventional intake resonator can be eliminated, the space can be effectively used, the size can be reduced, and vibration resistance can be reduced. Can improve.
[Brief description of the drawings]
FIG. 1 is a sectional view of an intake resonator taken along a line II in FIG. 2 showing an embodiment of the present invention.
FIG. 2 is a right side view of the intake resonator.
FIG. 3 is a front view of the engine.
FIG. 4 is a left side view of the engine.
FIG. 5 is a plan view of the engine.
FIG. 6 is a front view of the intake resonator in the production drawing.
FIG. 7 is a rear view of the intake resonator in the production drawing.
FIG. 8 is a plan view of the intake resonator in the production drawing.
FIG. 9 is a bottom view of the intake resonator in the production drawing.
FIG. 10 is a left side view of the intake resonator in the production drawing.
FIG. 11 is a right side view of the intake resonator in the production drawing.
FIG. 12 is a sectional view taken along line XII-XII in FIG. 11;
FIG. 13 is a sectional view taken along line XIII-XIII in FIG. 7;
FIG. 14 is a sectional view taken along line XIV-XIV of FIG.
15 is a sectional view taken along line XV-XV in FIG.
FIG. 16 is a schematic explanatory view showing a state of attachment of an intake resonator showing a conventional technique of the present invention.
FIG. 17 is a schematic explanatory view after the intake resonator is attached.
[Explanation of symbols]
2 engine 4 cylinder block 6 cylinder head 8 oil pan 10 cylinder head cover 12 intake pipe 14 intake passage 16 branch passage 18 intake resonator 20 branch part 22 branch pipe 24 first mounting part 26 second mounting part

Claims (4)

An air cleaner is located upstream of the intake passage of the engine,
To position the intake manifold downstream of the intake passage, a branch passage provided in the middle intake passage between the air cleaner and the intake manifold, the intake resonator of the engine to be contacted into the intake passage by the branch passage, the said intake resonator An intake pipe attached to an upper surface of an engine and constituting a part of the intake passage, and the branch pipe connected to the intake pipe and constituting the branch passage are arranged inside the intake resonator, and An intake resonator for an engine, wherein the intake pipe is curved in a U-shape when viewed from above, and the inlet and the outlet are opened to one side of the intake resonator. The intake resonator for an engine according to claim 1 , wherein the branch pipe is curved in a U-shaped circumferential direction of the intake pipe . The intake resonator for an engine according to claim 1, wherein the branch pipe is connected to a U-shaped curved portion of the intake pipe. The intake resonator of an engine according to claim 3, wherein the intake pipe is disposed on one side in the intake resonator, and the branch pipe is curved toward the other side in the intake resonator.

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