公开(公告)号：US20140271134A1

公开(公告)日：2014-09-18

申请号：US14045657

申请日：2013-10-03

Applicant: Kohler Co.

Inventor： Tyler W. LE ROY ,  Todd A. BAUMANN ,  Nicholas T. PAIROLERO ,  Dale D. SNYDER ,  Amy ADAMS

IPC: F01P11/12

CPC classification number: F01P11/12 ,  F04D29/4213 ,  F04D29/424 ,  F04D29/582 ,  F04D29/665

Abstract: An apparatus or system includes a component that generates or transfers noise having a frequency within a noise frequency range. The component may include a boundary. The apparatus or system may be an engine in some examples. The engine may additionally include a micro-perforated sheet positioned a distance from the boundary. The micro-perforated sheet may include a plurality of micro-perforated holes, and may be configured to absorb sound within an absorption frequency range based on parameters of the micro-perforated sheet. The parameters may include the distance from the boundary and dimensions of the micro-perforated holes, and may be set such that the absorption frequency range overlaps the noise frequency range.

Abstract translation: 装置或系统包括产生或传送噪声频率范围内的频率的噪声的部件。 组件可以包括边界。 在一些示例中，装置或系统可以是发动机。 发动机可以另外包括位于距离边界一定距离的微孔板。 微孔板可以包括多个微穿孔，并且可以被配置为基于微孔板的参数吸收吸收频率范围内的声音。 参数可以包括距离微孔的边界和尺寸的距离，并且可以被设置为使得吸收频率范围与噪声频率范围重叠。

公开(公告)号：US20140271132A1

公开(公告)日：2014-09-18

申请号：US13839907

申请日：2013-03-15

Applicant: KOHLER CO.

Inventor： Tyler W. LE ROY ,  Jonathan T. BYKOWSKI ,  Roger W. ALBERT

IPC: F01P11/12

CPC classification number: F04D29/665 ,  A01D34/826 ,  F01P5/02 ,  F01P5/06 ,  F01P11/12 ,  F02F1/065 ,  F04D17/16 ,  F04D29/4213 ,  F04D29/4226 ,  F04D29/424 ,  F04D29/582

Abstract: A noise suppression system for an air-cooled internal combustion engine is disclosed. The system may include an acoustically designed shroud forming a cavity and configured for attenuating noise produced by a cooling air fan associated with the engine. In one system, the shroud is mountable on a housing of the air fan. A pair of air inlet passages may be provided which are operable to draw ambient cooling air into the shroud to the fan. The air inlet passages are acoustically configured and tuned to attenuate noise generated by the fan. In one system, the air inlet passages may each be formed in a rear quadrant of the shroud. Various configurations of the shroud may include quarter wave resonators and/or micro-perforated panels to further attenuate fan noise.

Abstract translation: 公开了一种用于风冷内燃机的噪声抑制系统。 该系统可以包括形成空腔的声学设计的罩，并且构造成用于衰减与发动机相关联的冷却风扇产生的噪音。 在一个系统中，护罩可安装在风扇的壳体上。 可以设置一对空气入口通道，其可操作以将环境冷却空气吸入到风扇的罩中。 空气入口通道被声学配置和调谐以衰减由风扇产生的噪音。 在一个系统中，空气入口通道可分别形成在护罩的后象限中。 护罩的各种构造可以包括四分之一波形谐振器和/或微孔板，以进一步衰减风扇噪声。