Resonance silencer with dynamically adjusted silencing frequency

A technology of dynamic adjustment and muffler, applied in the direction of intake muffler, etc., can solve the problems of unsuitable arrangement of resonance muffler, limited space in engine compartment, noise reduction problem of intake system, etc. Easy to process effect

Inactive Publication Date: 2012-05-02
CHERY AUTOMOBILE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At different speeds of the engine, the noise frequency is different, which brings difficulties to the noise reduction of the intake system
Although the use of resonance mufflers can eliminate low-frequency noise, it is only effective for a single frequency, and the space in the engine compartment is limited, so it is not suitable to arrange more resonance mufflers

Method used

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  • Resonance silencer with dynamically adjusted silencing frequency
  • Resonance silencer with dynamically adjusted silencing frequency
  • Resonance silencer with dynamically adjusted silencing frequency

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Such as figure 2 As shown, the resonance muffler with dynamically adjustable muffler frequency in this embodiment includes a hollow shell 1, and the shell 1 has a connection hole 2 for communicating with the engine intake pipe 10. The resonant cavity 4 communicated with the hole 2, the volume of the resonant cavity 4 can be changed under the control of the engine control unit 7.

[0020] Specifically, a piston 3 is arranged in the housing 1, and the space between the piston 3 in the housing 1 and the communication hole forms a resonant cavity 4; the end of the piston 3 away from the connection hole 2 is fixed with an adjustment rod 5 to adjust The rod 5 passes through the housing 1 and is connected to a drive unit controlled by the engine control unit 7. The drive unit is a solenoid valve 6 that moves along the direction of the line between the piston 3 and the communication hole 2, and the piston 3 is driven to move by the solenoid valve 6, that is, The volume of the...

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PUM

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Abstract

The invention aims to provide a resonance silencer with a dynamically adjusted silencing frequency, which is applied to an engine to save space and improve noise reduction effect of the engine. The resonance silencer with the dynamically adjusted silencing frequency comprises a hollow housing; the housing is provided with a connecting hole used for being communicated with an engine air inlet pipeline; a resonance cavity communicated with the connecting hole is arranged in the housing; and the resonance cavity can be changed in volume under the control of an engine control unit. The resonance silencer with the dynamically adjusted silencing frequency is simple in structure, easy to manufacture and process and small in volume, and can save engine space. The volume of the resonance cavity is dynamically adjusted by the engine control unit to realize the aim of reducing induction noise at different rotation speeds.

Description

technical field [0001] The invention relates to the technical field of noise control of an automobile engine intake system, in particular to a resonant muffler whose muffler frequency can be dynamically adjusted. Background technique [0002] With the improvement of people's quality of life, people put forward higher requirements for the noise comfort in the car cab. The intake system noise is one of the main noise sources of automobiles, and most of them belong to low-frequency noise. At different speeds of the engine, the noise frequency is different, which brings difficulties to the noise reduction of the intake system. Although the use of resonance mufflers can eliminate low-frequency noise, it is only effective for a single frequency, and the space in the engine compartment is limited, so it is not suitable to arrange more resonance mufflers. Contents of the invention [0003] The object of the present invention is to propose a resonance muffler with dynamically adj...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02M35/12
Inventor 陈春来郭付洋
Owner CHERY AUTOMOBILE CO LTD
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