公开(公告)号：US20150020582A1

公开(公告)日：2015-01-22

申请号：US14384690

申请日：2013-03-12

Applicant: AVL EMISSION TEST SYSTEMS GMBH

Inventor： Achim Dickow ,  Rainer Ballik ,  Sascha Willich

IPC: G01N1/22 ,  G01N33/00 ,  G01M15/10

CPC classification number: G01N1/2252 ,  G01M15/102 ,  G01N33/0018 ,  G01N2001/2255

Abstract: A system for taking exhaust gas samples from internal combustion engines includes an exhaust gas duct comprising an outflow cross section and an exhaust gas inlet. The exhaust gas duct communicates with an exhaust gas source via the exhaust gas inlet. An air duct takes in ambient air via a filter. The outflow cross section is concentric in the air duct. A mixing zone is arranged downstream of the outflow cross section. A dilution tunnel has an exhaust gas/air mixture flow therethrough. An annular orifice is arranged downstream of the outflow cross section in the dilution tunnel. A flow deflection device is arranged upstream of the annular orifice and downstream of the outflow cross section. The flow deflection device deflects the exhaust gas/air mixture so that it departs from a center axis of the dilution tunnel immediately downstream of the flow deflection device in an axially symmetrical manner.

Abstract translation: 用于从内燃机排出废气样品的系统包括排气管道，其包括流出横截面和排气入口。 排气管经由排气入口与废气源连通。 风管通过过滤器吸收环境空气。 流出横截面在空气管中是同心的。 混合区设置在流出横截面的下游。 稀释通道具有通过其的排气/空气混合物流。 环形孔口布置在稀释管道中的流出横截面的下游。 流动偏转装置设置在环形孔的上游和流出横截面的下游。 流动偏转装置使废气/空气混合物偏转，使得其以轴向对称的方式从紧邻流动偏转装置的下游离开稀释通道的中心轴线。

公开(公告)号：US09952124B2

公开(公告)日：2018-04-24

申请号：US14384690

申请日：2013-03-12

Applicant: AVL EMISSION TEST SYSTEMS GMBH

Inventor： Achim Dickow ,  Rainer Ballik ,  Sascha Willich

IPC: G01M15/10 ,  G01N1/22 ,  G01N33/00

CPC classification number: G01N1/2252 ,  G01M15/102 ,  G01N33/0018 ,  G01N2001/2255

Abstract: A system for taking exhaust gas samples from internal combustion engines includes an exhaust gas duct comprising an outflow cross section and an exhaust gas inlet. The exhaust gas duct communicates with an exhaust gas source via the exhaust gas inlet. An air duct takes in ambient air via a filter. The outflow cross section is concentric in the air duct. A mixing zone is arranged downstream of the outflow cross section. A dilution tunnel has an exhaust gas/air mixture flow therethrough. An annular orifice is arranged downstream of the outflow cross section in the dilution tunnel. A flow deflection device is arranged upstream of the annular orifice and downstream of the outflow cross section. The flow deflection device deflects the exhaust gas/air mixture so that it departs from a center axis of the dilution tunnel immediately downstream of the flow deflection device in an axially symmetrical manner.