Method and apparatus for noise suppression in a fluid line

Details Method and apparatus for noise suppression in a fluid line Method and apparatus for noise suppression in a fluid line

1999-07-01

2000-12-05

Dang, Khanh

Acoustics

Sound-modifying means

Muffler, fluid conducting type

138113, F01N 100

Patent

active

061553786

ABSTRACT:
Method and apparatus for suppression of fluid-borne noise in hydraulic or fluid handling systems, such as automotive power steering, power brakes, air conditioning and fuel systems wherein a multi-chamber solution to attenuate fluid-borne noise in the system is disclosed. This solution optimizes both damping, interference and wave cancellation mechanisms in a fluid system and consists of dividing an attenuator conduit hose or pipe assembly serially into tuning chambers by a restrictor or other mechanism. In some embodiments, a tuner is placed in each and every chamber. The number of chambers can vary between two and four depending on the objective of the attenuation. In order to attenuate the ripple at the pump, the tuner in the first or most upstream chamber can be removed.

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The Use Of Flexible Hose To Reduce Pressure Ripple In Power Steering, submitted by Dr. J. E. Drew for the degree of PhD of the University of Bath in 1997.

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