ELECTRICALLY ACTUATED FLOW ASSISTED EXHAUST VALVE

摘要

A noise attenuation valve includes a flapper valve body (18) that is pivotable within an exhaust cavity (14) between maximum and minimum flow positions. The flapper valve body (18) is supported on a shaft (16) that is coupled to an actuator (24). The actuator (24) pivots the shaft (16) to attenuate noise by moving the flapper valve body (18) between the maximum and minimum flow positions. When in the maximum flow position, the flapper valve body (18) has an upper surface (38) and a lower surface (40). The support shaft (16) is mounted to the upper surface (38). This mounting configuration between the support shaft (16) and flapper valve body (18) provides a resultant torque on the shaft (16) that biases the flapper valve body (18) to the open position without requiring any additional resilient elements.