Helmholtz resonator
AssigneeVisteon Global Technologies, Inc.
InventorsJohn D. Kostun, Lakhi N. Goenka, David J. Moenssen, Christopher E. Shaw
Life of this patent
Estimating the term…
Abstract
A continuously variable Helmholtz resonator for a vehicle air intake system having a vibratory input to the resonator wall to dynamically adjust the cancellation frequency for time-varying acoustical signals, and at least one of mean resonator volume control, mean resonator neck length control, and mean resonator neck diameter control whereby control of both the dynamic and the mean properties of the resonator provides a wide-tuning spectrum and facilitates canceling of time-varying acoustical signals.
Claims20
A variable tuned resonator comprising:
- a housing having a chamber formed therein and a neck portion adapted to provide fluid communication between the chamber and a duct;
- an engine speed sensor adapted to sense a speed of an associated engine;
- control means coupled to said engine speed sensor for controlling at least one of a volume of the chamber, a length of the neck portion, and a diameter of the neck portion responsive to the speed sensed by said engine speed sensor, wherein controlling at least one of the volume of the chamber, the length of the neck portion, and the diameter of the neck portion tunes attenuation to a desired frequency of sound in the duct;
- a noise sensor responsive to noise within said duct;
- a vibratory displacement actuator disposed in the chamber of said housing, said vibratory displacement actuator for creating a vibratory input responsive to noise parameters sensed by said noise sensor, wherein the vibratory input cancels a desired frequency of sound in the duct.
A variable tuned resonator comprising:
- a housing having a chamber formed therein and a neck portion adapted to provide fluid communication between the chamber and a duct;
- a piston disposed within the chamber, said piston being selectively reciprocable to thereby change a volume of the chamber, wherein changing the volume of the chamber tunes attenuation to a desired frequency of sound in the duct;
- an engine speed sensor adapted to sense a speed of an associated engine;
- a noise sensor connected to the duct;
- a vibratory displacement actuator disposed in the chamber of said housing;
- and
- a programmable control module in communication with said noise sensor and said engine speed sensor, said programmable control module adapted to control the reciprocation of said piston in response to the speed sensed by said engine speed sensor, said programmable control module adapted to control said vibratory displacement actuator to create a vibratory input responsive to noise parameters sensed by said noise sensor, wherein the vibratory input cancels a desired frequency of sound in the duct.
A variable tuned resonator comprising:
- a housing having a chamber formed therein and a plurality of neck portions adapted to provide fluid communication between the chamber and a duct, each of the neck portions having a different neck length;
- a solenoid valve disposed in each of the neck portions, the solenoid valves adapted to be selectively opened and closed, whereby opening and closing of the solenoid valve facilitates selection of a desired neck length;
- an engine speed sensor adapted to sense a speed of an associated engine;
- and
- a programmable control module in communication with said engine speed sensor, said programmable control module adapted to control the opening and closing of said solenoid valves in response to the speed sensed by said engine speed sensor;
- wherein selection of the desired neck length tunes attenuation to a desired frequency of sound in the duct.
Dependencies are inferred from the claim text.