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Automobile noise reduction system with one-fourth wavelength pipes combined with Helmholtz silencer

A noise reduction system and wavelength tube technology, applied in the field of automotive noise reduction systems, can solve the problems of poor fuel economy, high power consumption, and high manufacturing costs, and achieve low manufacturing costs, low power consumption, and improved environmental quality.

Inactive Publication Date: 2014-05-14
HEILONGJIANG INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0019] In order to solve the problems of high manufacturing cost, poor noise reduction effect, large air intake resistance, high power consumption, poor fuel economy and unsuitability for various automobiles, the present invention provides an economical, durable and easy-to-install Automobile noise reduction system with convenient, simple structure, strong reliability and easy disassembly of 1 / 4 wavelength tube combined with Helmholtz muffler

Method used

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  • Automobile noise reduction system with one-fourth wavelength pipes combined with Helmholtz silencer
  • Automobile noise reduction system with one-fourth wavelength pipes combined with Helmholtz silencer
  • Automobile noise reduction system with one-fourth wavelength pipes combined with Helmholtz silencer

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specific Embodiment approach 1

[0037] Specific implementation method one: such as figure 1 As well as figure 2 and Figure 4 It shows that the car noise reduction system of the 1 / 4 wavelength tube combined with the Himshitz muffler, including intake manifolds 1. Inlet pipe 2. Erspeare door 3. Flexible connecting pipe 4. Air filter 8. Air filtering mesh, air filters9. Ahead of the air pipe 11. Humhoz's muffler 10, two rear intake ducts and two 1 / 4 wavelength pipes.Qi Guidance 2:12, the two 1 / 4 wavelength tubes of 1 / 4 wavelength tube 1 / 4 wavelength tube 1 / 4 and 1 / 4 wavelength pipe 2 7, the Humhhitz muffler 10 end and the forward gas pipe 11 sideThe wall connection and connecting the front air pipe 11, the forward gas pipe 11 out of the air and the air filter 8 inlet end, the air filter 9, the air filter 8 out of the air end andRear intake catheter 1 5 intake terminal is connected, rear intake duct 1 5 out of the air intake pipe 4 with the backward air catheter 2 12 inlet terminal, rear intake pipe 2 12 has throttl...

specific Embodiment approach 2

[0040] Specific implementation method two: such as figure 1 and Figure 4 The 1 / 4 wavelength tube of the specific embodiment of the specific embodiment combined with the car noise reduction system of the Homhoz muffler, the 1 / 4 wavelength tube 1 6 is the direct tube, and the 1 / 4 wavelength tube 2 7 is the curvedTube.The volume (transmission loss) of the 1 / 4 wavelength tube is related to the length and wavelength of the pipeline.The direct tube (that is, 1 / 4 wavelength tube 1 6) is shorter than the bending tube (1 / 4 wavelength tube 27), and the sound emissions effect is worse.The reason is that when the air enters the pipeline, the two tubes are restricted by each other, and the vortex gradually forms in the tube, which consumes a lot of sound energy.

specific Embodiment approach 3

[0041] Specific implementation method three: such as figure 1 and Figure 4 Show, the car noise reduction system of the 1 / 4 wavelength tube of the specific implementation method and the two wavelength pipes in charge of Humhhitz's muffler, the internal cavity diameter of the front cavity of the front air canal is 7.2-7.6cm.The length is 10-27cm.

[0042] The invention calculates the inherent frequency of the resonance cavity and the 1 / 4 wavelength tube, and then calculates the loss of the resonant cavity, that is, the volume of the sound, and finally determine the geometric size of the resonant cavity.

[0043] The present invention introduces the air into the combustion room through intake manifold 1. In this way, the Humhz Scholarship 10 is connected to the engine, because the system of the present invention is a co -accent mucoper and two 1 / 4 wavelength pipes.There is a small hole one on the side wall of the front air pipe 11. The small hole one is connected with the end of the ...

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Abstract

The invention discloses an automobile noise reduction system with one-fourth wavelength pipes combined with a Helmholtz silencer, and belongs to the technical field of environment control and improvement in order to solve the problems that an existing automobile noise reduction system is high in manufacturing cost, poor in noise elimination effect, high in air inlet resistance and consumed power, poor in fuel economy and not suitable for various automobiles. The Helmholtz silencer is communicated with the side wall of a front air inlet guide pipe, the front air inlet guide pipe is communicated with an air filter, an air filtering net is arranged in the air filter, the air filter is communicated with a first rear air inlet guide pipe, the first rear air inlet guide pipe is communicated with a second rear air inlet guide pipe through a flexible connecting pipe, an air throttling valve is arranged on the second rear air inlet guide pipe, the second rear air inlet guide pipe is communicated with an air inlet header pipe, the air inlet header pipe is communicated with an air inlet manifold, and one ends of the two one fourth wavelength pipes are both connected and communicated with the side wall of the first rear air inlet guide pipe. According to the system, while power property and economy of an automobile are maintained, the noise of the whole automobile can be lowered particularly, the environment quality can be improved, and the system is suitable for various automobiles.

Description

Technical field [0001] The invention involves a car noise reduction system, which is an environmental control and improvement in the technical field. Background technique [0002] The automotive industry has become popular with its rapid development and good reputation.With the development of science and technology and the improvement of humanistic concepts, people's ride comfort, especially the requirements for vibration noise control, are becoming more and more stringent.According to relevant foreign information, 70%of urban noise pollution originated from cars noise in traffic noise.Car noise has a significant negative impact on people's lives, work, study, and health, and is always polluted by the city.The control and governance of noise involves millions of households, which not only affects the comfort of the occupants riding, but also the key is to touch environmental protection issues, but also affect international and domestic reputation.The operating characteristics of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02M35/14
Inventor 李金库庞然李荣孙文鹏李雯
Owner HEILONGJIANG INST OF TECH
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