公开(公告)号：US20160298510A1

公开(公告)日：2016-10-13

申请号：US15094788

申请日：2016-04-08

Applicant: K&N Engineering, Inc.

Inventor： Steve Williams ,  Kevin McClelland ,  Marshall Buck

IPC: F01N1/16 ,  F01N1/06 ,  F01N1/02

CPC classification number: F01N1/023 ,  F01N1/02 ,  F01N1/06 ,  F01N1/082 ,  F01N1/163 ,  F01N2560/06 ,  G10K11/04 ,  G10K11/161

Abstract: An apparatus and method are provided for a drone elimination muffler to attenuate drone exhibited by engine exhaust systems. The drone elimination muffler comprises a hollow canister having a length and a diameter, and a tuned port comprising a first end connected to the canister and a second end connected to the exhaust system. The canister operates in concert with the tuned port as a dampener configured to substantially attenuate exhaust drone, or resonance, at one or more frequencies of engine operation. A valve is configured to switch the drone elimination muffler between a closed state in which the exhaust system operates without acoustic influence due to the drone elimination muffler, and an open state in which the drone elimination muffler directly influences the acoustic properties of the exhaust system.

Abstract translation: 提供了一种用于无人机消除消声器以减轻发动机排气系统所展示的无人驾驶飞机的装置和方法。 无人机消除消音器包括具有长度和直径的中空罐，以及调节端口，其包括连接到罐的第一端和连接到排气系统的第二端。 罐与调谐端口协调工作，作为阻尼器，其构造成在发动机操作的一个或多个频率处基本上衰减排气无人机或共振。 阀被构造成将无人机消除消声器切换到排气系统在没有由无人机消除消声器造成的声音影响的关闭状态之间，以及无人机消除消声器直接影响排气系统的声学特性的打开状态。