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Air induction housing having an auxiliary tuning volume for enhancing attenuation and broadening the bandwidth of a primary sound attenuator

A technology of air intake shell and sound attenuator, which is applied in the direction of intake muffler, combustion air/combustion-air treatment, machine/engine, etc., and can solve the problems of additional cost, installation complexity, space occupation requirements, etc.

Inactive Publication Date: 2009-12-23
GM GLOBAL TECH OPERATIONS LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] While the prior art solution of providing intake noise attenuation works, it does so by requiring the inclusion of an externally placed snorkel and resonator combination, which adds expense, installation complexity and space occupation requirements

Method used

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  • Air induction housing having an auxiliary tuning volume for enhancing attenuation and broadening the bandwidth of a primary sound attenuator
  • Air induction housing having an auxiliary tuning volume for enhancing attenuation and broadening the bandwidth of a primary sound attenuator
  • Air induction housing having an auxiliary tuning volume for enhancing attenuation and broadening the bandwidth of a primary sound attenuator

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Embodiment Construction

[0027] Referring now to the accompanying drawings, Figure 2 to Figure 12 Various aspects of an air intake housing with an auxiliary tuning space in accordance with the present invention are depicted.

[0028] For intake noise attenuation provided by (acoustic) attenuation chambers, the attenuation may operate based on Helmholtz attenuators (resonators), such as disclosed in U.S. Patent No. 5,979,598, where the resonant frequencies of the resonators are given as follows (e.g. , see http: / / en.wikipedia.org / wiki / Helmholtz_resonator):

[0029] ω H = γ A 2 m P 0 V 0 - - - ( 1 )

[0030] where γ is the adiabatic index, A is the cross-sectional ar...

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PUM

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Abstract

The present invention relates to an air induction housing having an auxiliary tuning volume for enhancing attenuation and broadening the bandwidth of a primary sound attenuator. An air induction housing as for example for a motor vehicle having an auxiliary tuning volume which provides an enhancement of the attenuation and a broadening of the bandwidth of attenuation of any primary attenuator of the air induction housing, yet with a minimal expense, complexity and packaging volume, and without adversely affecting the air flow path. The auxiliary tuning volume is characterized by an intermediate wall having a tuning slot, wherein the wall separates a tuning chamber of the auxiliary tuning volume from the main airflow passage of the housing.

Description

technical field [0001] The invention relates to air intake housings for air intake and air filtration, for example for the automotive sector, for supplying air to generally aspirated or gas-charged internal combustion engines, hydrogen fuel cells, etc. More particularly, the present invention relates to an intake housing having an auxiliary tuning volume that provides enhancement of attenuation and bandwidth extension for a primary attenuator connected to the intake housing. Background technique [0002] Internal combustion engines and hydrogen fuel cells rely on a sufficient amount of clean air for proper combustion therein of the oxygen in the air mixed with the fuel supply (internal combustion), or for the oxygen required for the hydrogen fuel cell chemistry. In this respect, an intake housing is provided which is connected to the intake manifold of the engine or to the air supply of the fuel cell, wherein the intake housing has at least one intake opening for intake air ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02M35/104F02M35/12H01M8/02
CPCF02M35/1261F02M35/1266F02M35/12
Inventor J·A·科斯B·J·瓦斯科托S·K·富里
Owner GM GLOBAL TECH OPERATIONS LLC