Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Square exhaust sound-muffling box for vehicle

A sound-absorbing box, square technology, applied in the direction of sound-absorbing devices, exhaust devices, engine components, etc., can solve the problems of unsatisfactory sound-absorbing effect of high-frequency noise, no resistive sound-absorbing materials, etc., to achieve good sound-absorbing effect, good effect effect

Inactive Publication Date: 2015-01-07
ZHUCHENG HAIDEWEI MACHINE
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For high-frequency noise, because the number of perforated pipe sections and perforated plates that are good at high-frequency noise attenuation is small, and there is no resistive sound-absorbing material that is good at high-frequency noise attenuation, it is not effective for high-frequency noise. The noise reduction effect of frequency noise is not ideal

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Square exhaust sound-muffling box for vehicle
  • Square exhaust sound-muffling box for vehicle

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0010] like figure 1 , 2 As shown, the present invention is respectively welded with front end cover 2 and rear end cover 3 at the two ends of square housing 1, and front bulkhead 4 and rear bulkhead 5 space the interior of square shell 1, between front bulkhead 4 and rear bulkhead. The middle part between the partitions 5 supports a catalytic converter 6, the air intake expansion pipe 7 is arranged on the upper side between the front partition 4 and the rear partition 5, and the intake bowl 8 is arranged on the upper part of the front end cover 2. side, the intake bowl 8 is connected to one end of the intake expansion tube 7, the other end of the intake expansion tube 7 is closed by the rear partition 5, and the mesh plate 9 is arranged on the inner side of the rear end cover 3. Glass fiber 10 is filled between the net plate 9 and the rear end cover 3 , and the air outlet pipe 11 is arranged at the bottom of the rear end cover 3 . Through the above settings, from the noise ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a square exhaust sound-muffling box for a vehicle. The square exhaust sound-muffling box for the vehicle is characterized in that a front end cover and a back end cover are respectively welded on the two ends of a square shell; the inner part of the square shell is separated by a front clapboard and a back clapboard; a catalysis device is supported in the middle of the front clapboard and the back clapboard; an air inflow expansion tube is arranged on one side of the upside between the front clapboard and the back clapboard; an air inflow bowl is arranged on one side of the upper part of the front end cover; a mesh plate is arranged on the inner side of the back end cover; glass fibers are filled between the mesh plate and the back end cover; an air outlet pipe is arranged on the lower part of the back end cover. Through the arrangement above, the square exhaust sound-muffling box for the vehicle has the advantage of good sound-muffling effect on medium and low frequency noise of an engine, also removes a portion of exhaust noise while reducing exhaust back pressure of the whole system of the engine, and obtains very good effects when being practically used in the vehicle.

Description

technical field [0001] The invention relates to an engine muffler, in particular to an exhaust muffler box for reducing engine exhaust noise and exhaust back pressure of the entire system. Background technique [0002] At present, the existing engine exhaust device mainly adopts the resistant exhaust muffler structure of pipe cross-section expansion and cross-section contraction, which uses the sound wave to reflect back to the sound source due to the change of the acoustic reactance at the sudden change in the cross-section, so as to achieve muffler. purpose of sound. This resistant exhaust device has a certain effect on the noise reduction of low and medium frequencies. As for high-frequency noise, because the number of perforated pipe sections and perforated plates that are good for high-frequency noise attenuation is small, and there is no resistive sound-absorbing material that is good for high-frequency noise attenuation, it is not effective for high-frequency noi...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): F01N1/00F01N1/08F01N13/08
Inventor 王冈垒李粉竹
Owner ZHUCHENG HAIDEWEI MACHINE
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com