Patent ID: 7992676
Filing Date: 2011-08-09
Classification: F01N,F02M

Abstract:
1. A compact tuned acoustic attenuation device for an air induction system, comprising: a housing enclosing and defining a housing chamber within, said housing including at least one acoustic chamber arranged within said housing chamber and positioned in a substantially lateral parallel relationship to said inlet channel at a position proximate to said first end wall, said at least one acoustic chamber enclosed by at least one side wall and a bottom wall defining an acoustic volume therein, said at least one acoustic chamber having an open end portion arranged facing said air gap in communication with said housing chamber, said at least one acoustic chamber having a depth defined by a distance between said bottom wall and said open end; wherein each of said at least one acoustic chambers has at least one of its volume and depth selected to provide a desired acoustic attenuation at a selected frequency and bandwidth of noise entering said housing chamber; and wherein at least a portion of said at least one acoustic chambers are configured to operate as quarter wave tuners.