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公开(公告)号：US11725555B1
公开(公告)日：2023-08-15
申请号：US17665796
申请日：2022-02-07
Applicant: Caterpillar Inc.
Inventor： Joshua L. Ratts , Hrishi Lalit Shah , Tyler V. Richards , Matthew Colin Mowers , Sowmya Nagesh
CPC classification number: F01N3/0293 , B01D53/9418 , B01D53/9431 , B01D53/9495 , F01N3/208 , F01N3/206 , F01N3/2066 , F01N2560/026 , F01N2610/1453 , F01N2900/1402 , F01N2900/1411 , F01N2900/1602 , F01N2900/1606 , F01N2900/1621 , F01N2900/1622
Abstract: An aftertreatment system for a diesel engine may include a diesel particulate filter configured for placement in fluid communication with the diesel engine to receive an exhaust flow. The system may also include a selective catalytic reduction system configured for arrangement downstream of the diesel particulate filter and a NOx sensor configured to measure a NOx concentration in the exhaust flow entering the selective catalytic reduction system. The system may also include a controller configured to estimate a ratio of NO2 to NOx downstream of the diesel particulate filter and based on a factor affecting the generation of NO2 upstream of the selective catalytic reduction system. The controller may also be configured to adjust the measured NOx concentration based on the ratio to provide an estimated actual NOx concentration and dose diesel exhaust fuel into the exhaust flow based on the estimated actual NOx concentration.
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公开(公告)号：US20230250744A1
公开(公告)日：2023-08-10
申请号：US17665796
申请日：2022-02-07
Applicant: Caterpillar Inc.
Inventor： Joshua L. Ratts , Hrishi Lalit Shah , Tyler V. Richards , Matthew Colin Mowers , Sowmya Nagesh
CPC classification number: F01N3/0293 , B01D53/9418 , B01D53/9431 , B01D53/9495 , F01N3/208 , F01N2610/1453 , F01N2900/1402 , F01N2900/1411 , F01N2900/1602 , F01N2900/1606
Abstract: An aftertreatment system for a diesel engine may include a diesel particulate filter configured for placement in fluid communication with the diesel engine to receive an exhaust flow. The system may also include a selective catalytic reduction system configured for arrangement downstream of the diesel particulate filter and a NOx sensor configured to measure a NOx concentration in the exhaust flow entering the selective catalytic reduction system. The system may also include a controller configured to estimate a ratio of NO2 to NOx downstream of the diesel particulate filter and based on a factor affecting the generation of NO2 upstream of the selective catalytic reduction system. The controller may also be configured to adjust the measured NOx concentration based on the ratio to provide an estimated actual NOx concentration and dose diesel exhaust fuel into the exhaust flow based on the estimated actual NOx concentration.
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公开(公告)号：US20160032801A1
公开(公告)日：2016-02-04
申请号：US14448653
申请日：2014-07-31
Applicant: Caterpillar Inc.
Inventor： Eric Tyler Alig , Jinhui Sun , Scott Charles Morris , Faith Juliet McKenzie , Matthew Colin Mowers
IPC: F01N3/20
CPC classification number: F01N13/011 , F01N3/035 , F01N3/106 , F01N3/2066 , F01N3/208 , F01N13/009 , F01N13/0097 , F01N2260/04 , F01N2550/05 , F01N2560/021 , F01N2560/06 , F01N2560/08 , F01N2610/02 , F01N2610/14 , F01N2900/0416 , Y02T10/24
Abstract: An aftertreatment system is disclosed for use with a combustion engine. The aftertreatment system may have at least one exhaust passage, and a plurality of dosing circuits configured to inject reductant into the at least one exhaust passage. The aftertreatment system may also have a controller in communication with each of the plurality of dosing circuits. The controller may be configured to determine a failure of a first of the plurality of dosing circuits, and to selectively adjust operation of a second of the plurality of dosing circuits based on the failure.
Abstract translation: 公开了一种与内燃机一起使用的后处理系统。 后处理系统可以具有至少一个排气通道，以及配置成将还原剂注入到至少一个排气通道中的多个计量回路。 后处理系统还可以具有与多个计量电路中的每一个通信的控制器。 控制器可以被配置为确定多个计量电路中的第一个的故障，并且基于故障来选择性地调整多个计量电路中的第二个的操作。
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