Patent ID: 7938227
Filing Date: 2011-05-10
Classification: F01N

Abstract:
1. A variable resonation chamber valve for a vehicle, comprising: a valve seat defining an inlet opening into an associated resonation chamber, said valve seat comprising converging wall portions that form said inlet opening; and a rotatable plunger movable into said inlet opening of said valve seat for varying a tuner area of said inlet opening, said tuner area defined between said valve seat and said rotatable plunger without contact between said valve seat and said rotatable plunger, said rotatable plunger comprising converging wall portions having a matching configuration as said converging wall portions of said valve seat, said converging wall portions of said valve seat and said converging wall portions of said rotatable plunger forming an annular passage through said inlet opening when said rotatable plunger is received in said inlet opening, a size of said annular passage varying based on a degree to which said rotatable plunger is received in said inlet opening.