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Silencing device of air inlet system of turbocharged engine

A technology of air intake system and turbocharging, which is applied in the field of auto parts, can solve the problem of narrow noise reduction band, achieve the effect of reducing engine intake noise, improving NVH level, and increasing noise reduction band

Inactive Publication Date: 2018-12-21
NINGBO FENGMAO FAR EAST RUBBER +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a kind of muffler device of turbocharged engine intake system, which solves the defect that the noise reduction band of existing turbocharged engine intake system muffler device is narrow

Method used

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  • Silencing device of air inlet system of turbocharged engine
  • Silencing device of air inlet system of turbocharged engine
  • Silencing device of air inlet system of turbocharged engine

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Such as figure 1 , figure 2 , image 3 , Figure 4 As shown, a kind of turbocharged engine air intake system muffler provided by the present invention comprises: a sealing connection pipe 1, has lower semicircle pipe 2; The tube constitutes a resonant cavity; and an upper semi-circular tube 4, which is installed inside the resonant cavity shell and docked with the lower semi-circular tube on the sealed connection tube, separates the first resonant cavity into an air intake lumen 5 and a main resonant cavity 6; Wherein the upper semi-circular pipe has a through hole 8 to communicate with the intake pipe cavity and the main resonant cavity; inside the resonant cavity there are several partition plates 7, which divide the main resonant cavity into a plurality of sub-resonant cavities which are not communicated with each other. The partition plate includes an upper partition plate 8 fixed on the upper cavity of the resonator and a lower partition plate 9 fixed on the up...

Embodiment 2

[0034] A kind of muffler for the air intake system of a turbocharged engine provided by the invention comprises: a sealed connecting pipe having a lower semicircular pipe; a resonant cavity shell installed on one side of the sealed connecting pipe and forming a resonant cavity with the lower semicircular pipe; And an upper semi-circular tube, which is installed inside the resonant cavity shell and docked with the lower semi-circular tube on the sealed connecting pipe, which separates the first resonant cavity into the intake lumen and the main resonant cavity; wherein the upper semi-circular tube has a through hole for communication The air intake tube cavity and the main resonant cavity; inside the resonant cavity there are several partition plates, which separate the main resonant cavity into multiple sub-resonant cavities which are not connected to each other.

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PUM

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Abstract

The invention provides a silencing device of an air inlet system of a turbocharged engine. The silencing device comprising a sealing connecting pipe, a resonant cavity shell and an upper semicircularpipe, wherein the sealing connecting pipe is provided with a lower semicircular pipe; the resonant cavity shell is installed on one side of the sealing connecting pipe and forms a resonant cavity withthe lower semicircular pipe; and the upper semicircular pipe is installed inside the resonant cavity shell and is in butt joint with the lower semicircular pipe on the sealing connecting pipe, and divides a first resonant cavity into an air inlet pipe cavity and a main resonant cavity; and the upper semicircular pipe is provided with a through hole communicating with the air inlet pipe cavity andthe main resonant cavity; a plurality of separation plates are arranged inside the resonant cavity, the main resonant cavity is divided into a plurality of auxiliary resonant cavities which not mutually communicate with one another by the separation plates. According to the silencing device, the plurality of mutually independent auxiliary resonant cavities are arranged in the main resonant cavity, on the premise of a transmission loss requirement of the silencing device can be met and the structure is compact, a silencing frequency band of the middle-high-frequency noise is greatly increased,so that the air inlet noise of the engine is reduced, and the NVH level of an automobile is improved.

Description

technical field [0001] The invention relates to the field of auto parts, in particular to a noise reduction device for an intake system of a turbocharged engine. Background technique [0002] The engine intake system with turbocharger, when the air passes through the turbocharger, the impeller blades cut the air at high speed to produce medium and high frequency noise in a wide frequency range. The air noise frequency after turbocharging coincides with the most sensitive sound wave frequency of 1000-3000Hz for the human ear. If the air supercharged by the turbocharger is not silenced and noise-reduced, it will greatly affect the ride comfort of the car. [0003] Existing noise reduction measures, such as Hertz resonators, 1 / 4 wavelength tubes and expanded resonators have their own limitations; Hertz resonators can usually only eliminate low-frequency noise, and are generally used in air filters ; The 1 / 4 wavelength tube can only eliminate single-frequency noise or narrow-ba...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02M35/12
CPCF02M35/1266
Inventor 蒋春雷马胜垚
Owner NINGBO FENGMAO FAR EAST RUBBER