公开(公告)号：WO2009140245A2

公开(公告)日：2009-11-19

申请号：PCT/US2009/043565

申请日：2009-05-12

Applicant: CATERPILLAR INC. ,  DRISCOLL, James, J. ,  ROBEL, Wade, J. ,  CHAVANNAVAR, Praveen, S.

Inventor： DRISCOLL, James, J. ,  ROBEL, Wade, J. ,  CHAVANNAVAR, Praveen, S.

IPC: F01N3/10 ,  F01N9/00 ,  B01D53/94 ,  B01D53/56 ,  B01J21/18 ,  F01N3/20

CPC classification number: F01N3/2066 ,  B01D53/9409 ,  B01D53/9495 ,  F01N2570/14 ,  F01N2610/03 ,  Y02T10/24

Abstract: An exhaust treatment control system includes a controller (28) configured to determine a value representative of a NO 2 concentration associated with an exhaust gas upstream of a selective catalytic reduction (SCR) catalyst (22), and determine a value representative of a NO concentration associated with the exhaust gas upstream of the SCR catalyst. The controller can also be configured to transmit a signal to at least partially control an injection of a hydrocarbon into the exhaust gas, wherein the hydrocarbon injection can occur upstream of an oxidation catalyst (20) to at least partially decrease the NO 2 concentration of the exhaust gas downstream of the oxidation catalyst, and wherein the oxidation catalyst can be located upstream of the SCR catalyst.

Abstract translation: 排气处理控制系统包括控制器（28），其被配置为确定代表与选择性催化还原（SCR）催化剂（22）上游的废气相关联的NO 2浓度的值，并且确定代表与NO浓度相关联的值 在SCR催化剂上游排出废气。 控制器还可以被配置为传输信号以至少部分地控制将烃注入到废气中，其中烃注入可以发生在氧化催化剂（20）的上游，以至少部分地降低排气的NO 2浓度 气体在氧化催化剂的下游，并且其中氧化催化剂可以位于SCR催化剂的上游。

公开(公告)号：WO2009017639A1

公开(公告)日：2009-02-05

申请号：PCT/US2008/008946

申请日：2008-07-23

Applicant: CATERPILLAR INC. ,  ROBEL, Wade, J. ,  CHAVANNAVAR, Praveen, S. ,  HARDY, William, L. ,  SCHROEDER, Eric, L.

Inventor： ROBEL, Wade, J. ,  CHAVANNAVAR, Praveen, S. ,  HARDY, William, L. ,  SCHROEDER, Eric, L.

IPC: F01N3/20 ,  F01N3/035 ,  F01N3/023

CPC classification number: F01N3/2066 ,  F01N3/0231 ,  F01N3/025 ,  F01N3/027 ,  F01N3/035 ,  F01N3/106 ,  F01N3/208 ,  F01N13/009 ,  F01N13/0093 ,  F01N13/011 ,  F01N2510/0682 ,  F01N2560/026 ,  F01N2560/06 ,  F01N2610/02 ,  Y02T10/24

Abstract: An exhaust treatment system (20, 30, 60, 70, 80) includes an oxidation device (22, 62, 72) having a plurality of channels (22a) through which a flow of exhaust flows. A first portion of the channels are coated with catalytic material for converting NO to NO 2 , and a second portion of the channels are uncoated with the catalytic material. The exhaust treatment system also includes a selective catalytic reduction device (23, 28, 28a) disposed downstream from the oxidation device. The selective catalytic reduction device is configured to receive the flow of exhaust passing through the oxidation device.

Abstract translation: 废气处理系统（20,30,60,70,80）包括具有多个通道（22a）的氧化装置（22,62,72），废气流通过该通道流动。 通道的第一部分涂覆有用于将NO转化为NO 2的催化材料，并且通道的第二部分不与催化材料一起涂覆。 废气处理系统还包括设置在氧化装置下游的选择性催化还原装置（23,28,28a）。 选择性催化还原装置构造成接收通过氧化装置的排气流。

公开(公告)号：WO2009140245A3

公开(公告)日：2010-04-01

申请号：PCT/US2009043565

申请日：2009-05-12

Applicant: CATERPILLAR INC ,  DRISCOLL JAMES J ,  ROBEL WADE J ,  CHAVANNAVAR PRAVEEN S

Inventor： DRISCOLL JAMES J ,  ROBEL WADE J ,  CHAVANNAVAR PRAVEEN S

IPC: F01N3/10 ,  B01D53/56 ,  B01D53/94 ,  B01J21/18 ,  F01N3/20 ,  F01N9/00

CPC classification number: F01N3/2066 ,  B01D53/9409 ,  B01D53/9495 ,  F01N2570/14 ,  F01N2610/03 ,  Y02T10/24

Abstract: An exhaust treatment control system includes a controller (28) configured to determine a value representative of a NO2 concentration associated with an exhaust gas upstream of a selective catalytic reduction (SCR) catalyst (22), and determine a value representative of a NO concentration associated with the exhaust gas upstream of the SCR catalyst. The controller can also be configured to transmit a signal to at least partially control an injection of a hydrocarbon into the exhaust gas, wherein the hydrocarbon injection can occur upstream of an oxidation catalyst (20) to at least partially decrease the NO2 concentration of the exhaust gas downstream of the oxidation catalyst, and wherein the oxidation catalyst can be located upstream of the SCR catalyst.

Abstract translation: 排气处理控制系统包括控制器（28），其被配置为确定代表与选择性催化还原（SCR）催化剂（22）上游的废气相关联的NO 2浓度的值，并且确定代表与NO浓度相关联的值 在SCR催化剂上游排出废气。 控制器还可以被配置为传输信号以至少部分地控制将烃注入到废气中，其中烃注入可以发生在氧化催化剂（20）的上游，以至少部分地降低排气的NO 2浓度 气体在氧化催化剂的下游，并且其中氧化催化剂可以位于SCR催化剂的上游。

公开(公告)号：WO2008082467A1

公开(公告)日：2008-07-10

申请号：PCT/US2007/025257

申请日：2007-12-11

Applicant: CATERPILLAR INC. ,  DRISCOLL, James, Joshua ,  CHAVANNAVAR, Praveen, S. ,  PAULSON, Thomas, E. ,  LIANG, Cho, Y. ,  WOODS, Michael, L.

Inventor： DRISCOLL, James, Joshua ,  CHAVANNAVAR, Praveen, S. ,  PAULSON, Thomas, E. ,  LIANG, Cho, Y. ,  WOODS, Michael, L.

IPC: F01N3/023 ,  F01N3/035 ,  F01N3/08 ,  F01N3/20 ,  F01N9/00 ,  F02D41/00

CPC classification number: F01N3/023 ,  F01N3/035 ,  F01N3/0814 ,  F01N3/0821 ,  F01N3/206 ,  F01N9/002 ,  F01N13/009 ,  F02B37/013 ,  F02M26/06 ,  Y02T10/24 ,  Y02T10/47

Abstract: An exhaust gas treatment system (10, 100, 200, 300) of an internal combustion engine (12) includes a selective catalytic reduction catalyst (19) fluidly connected to the internal combustion engine (12), an oxidation catalyst fluidly connected upstream of the selective catalytic reduction catalyst (19), and a particulate filter (16, 36) fluidly connected upstream of the selective catalytic reduction catalyst (19). The exhaust gas treatment system (10, 100, 200, 300) further includes a recirculation line (24) configured to direct a portion of an exhaust flow of the internal combustion engine (12) toward an inlet (21) of the engine (12).

Abstract translation: 内燃机（12）的废气处理系统（10,100,200,300）包括流体连接到内燃机（12）的选择性催化还原催化剂（19），流体连接到内燃机 选择性催化还原催化剂（19）和流体连接在选择性催化还原催化剂（19）上游的颗粒过滤器（16,36）。 废气处理系统（10,100,200,300）还包括再循环管线（24），其构造成将内燃机（12）的排气流的一部分朝向发动机（12）的入口（21） ）。