公开(公告)号：WO2003031796A1

公开(公告)日：2003-04-17

申请号：PCT/CA2002/001459

申请日：2002-10-09

Applicant: SIEMENS VDO AUTOMOTIVE INC.

Inventor： COLE, Roderick ,  LETOURNEAU, Mark ,  PETTIPIECE, Jason

IPC: F02M35/12

CPC classification number: F04D29/663 ,  F02B33/44 ,  F02B37/00 ,  F02M35/1216 ,  Y02T10/144

Abstract: A flow tube for an induction system with a turbo charger defines a longitudinal flow path and includes a noise attenuation plate positioned within the flow tube. A plurality of ribs formed on an internal surface of the tube. The ribs are spaced apart from one another and are tuned to a desired frequency. The noise attenuation plate includes a plurality of holes having varying diameter and depths. When acoustic energy created by the turbo charger encounters the noise attenuation plate and the ribs, the change in impedance results in acoustic reflections back toward the turbo charger. Thus the noise attenuation plate cooperates with the ribs to serve as a low pass filter that attenuates high frequencies while allowing lower frequencies through.

Abstract translation: 用于具有涡轮增压器的感应系统的流管限定纵向流动路径并包括位于流管内的噪声衰减板。 形成在管的内表面上的多个肋。 肋彼此间隔开并被调谐到期望的频率。 噪声衰减板包括具有变化的直径和深度的多个孔。 当由涡轮增压器产生的声能遇到噪声衰减板和肋时，阻抗的变化导致声波反射回涡轮增压器。 因此，噪声衰减板与肋协作以用作低通滤波器，其在允许较低频率通过的同时衰减高频。

公开(公告)号：WO2003027480A1

公开(公告)日：2003-04-03

申请号：PCT/CA2002/001460

申请日：2002-09-27

Applicant: SIEMENS VDO AUTOMOTIVE INC.

Inventor： COLE, Roderick ,  PETTIPIECE, Jason ,  LETOURNEAU, Mark

IPC: F02M35/12

CPC classification number: F02M35/10321 ,  B29C45/006 ,  F01N1/08 ,  F02B33/44 ,  F02M29/04 ,  F02M35/10157 ,  F02M35/10262 ,  F02M35/1034 ,  F02M35/10347 ,  F02M35/1216 ,  F05C2225/08 ,  F16L55/02727 ,  Y02T10/144 ,  Y02T10/146

Abstract: A flow tube (18) for an induction system (14) with a turbo charger (12) includes a first tube half (22) and a second tube half with a noise attenuation plate (24) positioned between the halves. The noise attenuation plate includes a plurality of holes (48) having varying diameter and depths. The first tube half, the second tube half, and the noise attenuation plate are integrally formed as a single piece during an injection molding process. The noise attenuation plate is folding along a first living hinge (28) to overlap one of the first or second tube halves. The other of the first or second tube halves is folded along a second living hinge (30) to overlap the noise attenuation plate forming a flow tube that defines a flow path. The noise attenuation plate is thus positioned in the flow path. When acoustic energy created by the turbo charger encounters the noise attenuation plate, the change in impedance results in acoustic reflections back toward the turbo charger. Thus the noise attenuation plate serves as a low pass filter that attenuates high frequencies while allowing lower frequencies through.

Abstract translation: 用于具有涡轮增压器（12）的感应系统（14）的流管（18）包括第一管半部（22）和具有位于两半之间的噪声衰减板（24）的第二管半部。 噪声衰减板包括具有不同直径和深度的多个孔（48）。 在注射成型过程中，第一管半部，第二管半部和噪声衰减板一体地形成为单件。 噪音衰减板沿着第一活动铰链（28）折叠以与第一或第二管半部重叠。 第一或第二管半部中的另一个沿着第二活动铰链（30）折叠以与形成限定流路的流动管的噪声衰减板重叠。 因此，噪声衰减板位于流路中。 当涡轮增压器产生的声能遇到噪声衰减板时，阻抗的变化导致声波反射回涡轮增压器。 因此，噪声衰减板用作低通滤波器，其在允许较低频率通过的同时衰减高频。