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Inhalation sound reduction device

A suction sound reduction and suction pipe technology, applied in the intake muffler, charging system, combustion air/combustion-air treatment, etc., can solve the problem that it is difficult to fully suppress the confluence, and achieve the effect of suppressing abnormal sound

Active Publication Date: 2017-07-21
NOK CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, although the rectifying mesh of the conventional example can exert a certain degree of rectifying function, it is difficult to sufficiently suppress the confluence of the upper air flow X1 and the lower air flow X2.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] refer to Figure 1 ~ Figure 3 , the suction noise reduction device according to Embodiment 1 of the present invention will be described.

[0036]

[0037] refer to figure 1 and figure 2 , the structure of the suction noise reduction device of this embodiment will be described. figure 1 It is a plan view of the suction noise reduction device of Example 1 of the present invention. figure 2 It is a schematic cross-sectional view showing the state of use of the air intake sound reducing device according to the first embodiment of the present invention. figure 2 The suction sound reduction device in the figure 1 Cutaway view of AA.

[0038] The intake noise reduction device 100 of the present embodiment is arranged on the downstream side of the throttle valve 300 in the intake pipe. In addition, in the present embodiment, the intake sound reducing device 100 is disposed near the connection portion between the intake manifold 210 and the throttle valve 220 const...

Embodiment 2

[0057] Figure 4 and Figure 5 Embodiment 2 of the present invention is shown. The present embodiment shows a structure in which a cylindrical portion is provided between the rectifying mesh and the gasket portion constituting the suction sound reducing device. The rest of the structure is the same as that of Embodiment 1, so the same reference numerals are attached to the same structural parts and their descriptions are omitted.

[0058] Using the suction pipe and sample S13 used in the above experiment, the distance L between the throttle valve 300 and the suction sound reduction device 100 was changed (refer to figure 2 ), illustrating the experimental results of measuring the sound pressure when the throttle valve 300 starts to open. Figure 4 It is a graph showing the noise sound pressure ratio when the distance L between the throttle valve 300 and the intake sound reducing device 100 is changed.

[0059] In the graph, S21 represents the case where the distance L is ...

Embodiment 3

[0065] Figure 6 Example 3 of the present invention is shown in . Embodiment 1 described above shows the case where the rectifying mesh is provided in the substantially semicircular region inside the gasket portion. This embodiment shows a structure in which the rectifying net is installed over the entire area inside the gasket portion. The other structures and functions are the same as those in Embodiment 1, and the same symbols are assigned to the same structural parts, and therefore description thereof will be omitted.

[0066] The suction noise reduction device 100 of the present embodiment includes a rectifying net 110 and a gasket portion 120 as in the case of the first embodiment described above. In addition, the intake noise reduction device 100 is made of elastic bodies such as various rubber materials or resin elastic bodies, and the rectifying mesh 110 and the gasket portion 120 are integrated. However, it is preferable that the rectifying mesh 110 is made of a r...

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PUM

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Abstract

The invention provides an inhalation sound reduction device capable of suppressing abnormal sound in an inhalation pipe. The suction noise reduction device (100) has a rectification net (110) arranged downstream of the throttle valve in the suction pipe to rectify the flow of air. The rectification net (110) has fine mesh near the center of the flow path in the suction pipe, And along with being away from the mesh near the center, for example, the mesh of the rectifying net (110) is composed of a plurality of radial parts (111) extending radially from the center of the flow path in the suction pipe to the outside and the said concentric circles are arranged near the center A plurality of concentric circular portions (112) of the shape are formed.

Description

technical field [0001] The invention relates to an inhalation sound reducing device, which is arranged in an inhalation pipe and reduces the inhalation sound. Background technique [0002] A throttle valve is installed in the suction pipe to suppress the suction volume. Here, when the throttle valve is opened sharply, there is a problem of abnormal noise. refer to Figure 10 Describe the mechanism that produces this abnormal sound. Figure 10 This is a diagram illustrating the flow of air when the throttle valve in the intake pipe starts to open. As shown in the figure, a throttle valve 300 is provided in the intake pipe 200 . Generally, the throttle valve 300 rotates around a rotation axis extending in the horizontal direction. Therefore, when the throttle valve 300 starts to open, the air flow X1 on the upper side and the air flow X2 on the lower side in the intake pipe 200 are generated. It is conceivable that an abnormal sound is generated when the air flow X1 on the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16J15/12F02M35/12F16J15/10
CPCF02D9/104F02M35/1211F02M35/1216F02M35/10006
Inventor 义经修司渡部茂井上雅彦细沼慎正
Owner NOK CORP
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