公开(公告)号：US08966965B2

公开(公告)日：2015-03-03

申请号：US13861781

申请日：2013-04-12

Applicant: Caterpillar Inc.

Inventor： James Joshua Driscoll ,  Arvind Jujare ,  Shawn Herold ,  Jason Hudgens ,  Sachin S. Deshmukh

IPC: G01M15/10 ,  F15D1/02 ,  F01N3/20 ,  F01N11/00

CPC classification number: F15D1/025 ,  B01F5/0618 ,  B01F5/0648 ,  B01F5/0688 ,  B01F5/0689 ,  B01F2005/0631 ,  B01F2005/0636 ,  F01N3/2066 ,  F01N3/208 ,  F01N11/00 ,  F01N13/008 ,  F01N2240/20 ,  F01N2470/00 ,  F01N2560/026 ,  G01M15/102 ,  Y02T10/24

Abstract: Accurate measurement of exhaust gas compounds is necessary for correct operation of exhaust treatment systems, such as Selective Catalytic Reduction (SCR) units used in diesel engines. However, accurate sensor readings assume an even distribution of compounds in an exhaust stream in order to use a sampled measurement to be extrapolated to the compound concentrations in the full stream. A structure placed in an exhaust passage downstream of an SCR reaction unit causes turbulence in the exhaust gas while developing a minimal backpressure. This turbulence helps create a more uniform distribution of compounds in the exhaust. As a result, an exhaust gas sensor gives more accurate readings even when the sensor is placed in relatively close proximity to an output of the SCR system.

Abstract translation: 排气处理系统的正确操作，例如柴油发动机中使用的选择性催化还原（SCR）单元，对废气化合物的精确测量是必需的。 然而，精确的传感器读数假设化合物在排气流中的均匀分布，以便将采样的测量值推算为全流中的化合物浓度。 放置在SCR反应单元下游的排气通道中的结构在显现最小背压的同时引起排气中的湍流。 这种湍流有助于在排气中产生更均匀的化合物分布。 因此，即使当传感器被放置在相对靠近SCR系统的输出端时，排气传感器也能提供更准确的读数。

公开(公告)号：US20140305198A1

公开(公告)日：2014-10-16

申请号：US13861781

申请日：2013-04-12

Applicant: CATERPILLAR INC.

Inventor： James Joshua Driscoll ,  Arvind Jujare ,  Shawn Herold ,  Jason Hudgens ,  Sachin S. Deshmukh

IPC: F15D1/02 ,  F01N11/00 ,  G01M15/10 ,  F01N3/20

CPC classification number: F15D1/025 ,  B01F5/0618 ,  B01F5/0648 ,  B01F5/0688 ,  B01F5/0689 ,  B01F2005/0631 ,  B01F2005/0636 ,  F01N3/2066 ,  F01N3/208 ,  F01N11/00 ,  F01N13/008 ,  F01N2240/20 ,  F01N2470/00 ,  F01N2560/026 ,  G01M15/102 ,  Y02T10/24

Abstract: Accurate measurement of exhaust gas compounds is necessary for correct operation of exhaust treatment systems, such as Selective Catalytic Reduction (SCR) units used in diesel engines. However, accurate sensor readings assume an even distribution of compounds in an exhaust stream in order to use a sampled measurement to be extrapolated to the compound concentrations in the full stream. A structure placed in an exhaust passage downstream of an SCR reaction unit causes turbulence in the exhaust gas while developing a minimal backpressure. This turbulence helps create a more uniform distribution of compounds in the exhaust. As a result, an exhaust gas sensor gives more accurate readings even when the sensor is placed in relatively close proximity to an output of the SCR system.

Abstract translation: 排气处理系统的正确操作，例如柴油发动机中使用的选择性催化还原（SCR）单元，对废气化合物的精确测量是必需的。 然而，精确的传感器读数假设化合物在排气流中的均匀分布，以便将采样的测量值推算为全流中的化合物浓度。 放置在SCR反应单元下游的排气通道中的结构在显现最小背压的同时引起排气中的湍流。 这种湍流有助于在排气中产生更均匀的化合物分布。 因此，即使当传感器被放置在相对靠近SCR系统的输出端时，排气传感器也能提供更准确的读数。