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Broadband silencer for fuel cell vehicle

A technology for fuel cell vehicles and mufflers, which is applied to fuel cells, components of pumping devices for elastic fluids, electrochemical generators, etc., can solve the problems of long cycle, high cost, slow response, etc., and widen the acoustic performance. Effect

Pending Publication Date: 2022-07-01
MANNHUMMEL FILTER SHANGHAI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method of reducing broadband noise has the disadvantages of slow response, long cycle and high cost
[0004] In addition, because liquid water will be produced at the exhaust end of the fuel cell, the broadband muffler designed for the broadband noise generated by the turbocharger cannot be applied to the exhaust end of the fuel cell vehicle, and the muffler will often fail due to water accumulation

Method used

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  • Broadband silencer for fuel cell vehicle
  • Broadband silencer for fuel cell vehicle
  • Broadband silencer for fuel cell vehicle

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] like figure 1 , 2 , a broadband muffler for fuel cell vehicles, comprising a first casing 100, a second casing 200 and an inner tube 300, the first casing 100 and the second casing 200 are connected to form a sealed cavity, and the inner The tube 300 is installed in the sealed cavity formed by the first casing 100 and the second casing 200 , and the inner tube 300 has holes or grooves to form a plurality of sound-absorbing structures in the sealed cavity.

[0040] like Image 6 , 7 , the second shell 200 is a stepped cylindrical pipe, and the second shell 200 is provided with a water collecting tank 201 along its side. water in each chamber, thereby preventing the failure of each chamber of the muffler due to accumulation of water. One end of the exhaust port of the inner intubation pipe 300 is connected with a venturi pipe 400 , and a drain pipe 401 communicated with the water collecting tank 201 is provided in the center of the venturi pipe 400 .

[0041] like ...

Embodiment 2

[0049] In a specific muffler design, the sound-absorbing cotton 1 (OX-Pan) and the sound-absorbing cotton 2 (Basotec G+ of BASF) are integrated in the muffler. The sound-absorbing cotton structure is as follows: Figure 10-12 shown. The specific process parameters of each muffler structure are as follows: Figure 15 , the volume of C1 is 0.27L, the square hole is opened, and the opening rate is 0.66, which is used to fill the sound-absorbing cotton. The function of the sound-absorbing cotton is 1000-8000Hz; 6 holes, the opening rate is 0.014, and the corresponding silencing frequency is 1000Hz; the volume of C3 is 0.044L, and 11 circular holes with a diameter of 5mm are opened, the hole rate is 0.045, and the corresponding sound silencing frequency is 1120Hz; C4 The volume of C5 is 0.027L, 5 circular holes with a diameter of 5mm are opened, the opening rate is 0.022, and the corresponding silencing frequency is 1420Hz; the volume of C5 is 0.13L, the cavity is not perforated, ...

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Abstract

The invention relates to a broadband silencer for a fuel cell vehicle, the broadband silencer comprises a first shell, a second shell and an inner insertion pipe, the first shell and the second shell are connected to form a sealed cavity, the inner insertion pipe is installed in the sealed cavity formed by the first shell and the second shell, the inner insertion pipe is provided with a hole or a groove, and the first shell and the second shell are connected through the hole or the groove. A sealing cavity is formed in the second shell, a plurality of silencing structures are formed in the sealing cavity, a water collecting groove is formed in the second shell along the side portion of the second shell, one end of an exhaust port of the inner inserting pipe is connected with a venturi pipe, and a drainage pipe communicated with the water collecting groove is arranged in the center of the venturi pipe. The drainage structure and the Venturi tube are integrated in the silencer, the self-drainage function can be achieved in the real vehicle running state, and meanwhile the excellent noise reduction function is achieved.

Description

technical field [0001] The invention relates to an automobile muffler, in particular to a broadband muffler for a fuel cell vehicle. Background technique [0002] At present, the trend of new energy vehicles for passenger cars and the country's policy advocacy for new energy vehicles have led major OEMs to develop layouts in the field of new energy vehicles. One of the new energy vehicles, fuel cell vehicles, is currently developing rapidly. The fuel cell releases power to the car by inhaling fresh air and mixing it with the combustible gas hydrogen. However, when the fuel cell system provides power to the vehicle, both the intake and exhaust ends of the fuel cell system may generate broadband noise with a certain bandwidth. [0003] At present, the measures taken by OEMs and suppliers of intake and exhaust systems for the broadband noise are to determine the frequency of problems through a large number of subjective and objective analyses after measuring the noise data, a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04D29/66H01M8/04119
CPCF04D29/663F04D29/665F04D29/664H01M8/04164H01M8/04119G10K11/161G10K11/172B60L50/72B60L2270/142H01M2250/20F01N13/08F01N13/1827F01N3/005Y02E60/50
Inventor 倪益民王开专
Owner MANNHUMMEL FILTER SHANGHAI
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