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公开(公告)号：US11566554B2
公开(公告)日：2023-01-31
申请号：US17199475
申请日：2021-03-12
Applicant: Caterpillar Inc.
Inventor： Joshua L. Ratts , Tyler V. Richards
Abstract: Systems, methods, assemblies, and components for aftertreatment of an engine can comprise an aftertreatment module including an exhaust enclosure with at least one inlet port to receive exhaust gas, an outlet port to output exhaust gas, a first compartment, and a second compartment; a plurality of particulate filters extending in parallel with each other within the exhaust enclosure such that, for each of the particulate filters, an inlet of the particulate filter is in the first compartment and an outlet of the particulate filter is in the second compartment; and at least one radio frequency (RF) sensor set including an RF transmitter assembly and an RF receiver assembly. The RF transmitter assembly can be provided in the first compartment at the inlet of one of the particulate filters, and the RF receiver assembly can be provided at the outlet of said one particulate filter.
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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：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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