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公开(公告)号：US11781464B1
公开(公告)日：2023-10-10
申请号：US17657576
申请日：2022-03-31
申请人： Caterpillar Inc.
发明人： Frank Lombardi , Baoyong Liu , Urvish Joshi , Austin Bierle , Jay Venkataraghavan , Kent Anthony Schonert
CPC分类号： F01N11/00 , F01N3/208 , F01N9/005 , F01N9/007 , F01N11/007 , F01N2550/02 , F01N2550/05 , F01N2900/04 , F01N2900/0406 , F01N2900/0408 , F01N2900/0412 , F01N2900/06 , F01N2900/08 , F01N2900/1402 , F01N2900/1602 , F01N2900/1614 , F01N2900/18 , F01N2900/1814
摘要： A method for estimating a quality of reductant in an engine aftertreatment system for an engine using a virtual sensor, the method comprising: determining whether an enablement condition is met, wherein the enablement condition is one or more of: a reductant fill condition determined based on data received from one or more float sensors associated with the engine; a machine start condition determined based on machine speed data obtained from a speed sensor associated with the engine; and/or a rationality check condition determined based on data associated with a fault of one or more sensors associated with the engine; upon determining that the enablement condition is met, receiving NOx measurement data obtained from at least one NOx sensor; generating a reductant quality value based on the NOx measurement data; and outputting a reductant quality determination based on the reductant quality value.
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公开(公告)号：US20230313724A1
公开(公告)日：2023-10-05
申请号：US17657576
申请日：2022-03-31
申请人： Caterpillar Inc.
发明人： Frank LOMBARDI , Baoyong LIU , Urvish JOSHI , Austin BIERLE , Jay VENKATARAGHAVAN , Kent Anthony SCHONERT
CPC分类号： F01N11/00 , F01N3/208 , F01N2900/1814 , F01N2900/08 , F01N2900/1402 , F01N2900/1602 , F01N2900/0408 , F01N2550/02
摘要： A method for estimating a quality of reductant in an engine aftertreatment system for an engine using a virtual sensor, the method comprising: determining whether an enablement condition is met, wherein the enablement condition is one or more of: a reductant fill condition determined based on data received from one or more float sensors associated with the engine; a machine start condition determined based on machine speed data obtained from a speed sensor associated with the engine; and/or a rationality check condition determined based on data associated with a fault of one or more sensors associated with the engine; upon determining that the enablement condition is met, receiving NOx measurement data obtained from at least one NOx sensor; generating a reductant quality value based on the NOx measurement data; and outputting a reductant quality determination based on the reductant quality value.
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公开(公告)号：US11674422B2
公开(公告)日：2023-06-13
申请号：US17707072
申请日：2022-03-29
发明人： Colin L. Norris , Bryon D. Staebler , Jeffrey Diwakar Abraham , Thomas R. Nelson , Santhosh Kumar Pettem , Dylan Lawrence Schneider
CPC分类号： F01N3/2013 , F01N3/0253 , F01N3/106 , F01N3/2066 , F01N2240/16 , F01N2900/0408 , F01N2900/0411 , F01N2900/0601 , F01N2900/0602 , F01N2900/1404
摘要： An aftertreatment system includes a selective catalytic reduction (SCR) system, a heater, and a controller that determines a rise in temperature of exhaust gas at an outlet of the heater for a plurality of power levels, predicts a first temperature of the exhaust gas at the outlet of the heater based on the rise in temperature, predicts a second temperature of the exhaust gas at a location of the SCR system based on the first temperature, compares the second temperature for each of the plurality of power levels with a target temperature of the exhaust gas at the inlet of the SCR system, selects one of the plurality of power levels based on the comparison, and adjusts operation of the heater based on the selected one of the plurality of power levels to achieve the target temperature of the exhaust gas at the inlet of the SCR system.
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4.发明申请公开(公告)号：US20180274418A1
公开(公告)日：2018-09-27
申请号：US15467466
申请日：2017-03-23
发明人： David Edwards , Sarah Funk , Po-I Lee
IPC分类号： F01N3/20
CPC分类号： F01N3/208 , F01N3/2066 , F01N11/00 , F01N11/002 , F01N2550/02 , F01N2560/026 , F01N2610/02 , F01N2900/0408 , F01N2900/1402 , F01N2900/1616 , F01N2900/1622 , Y02T10/47
摘要： Method for controlling and/or monitoring the performance of selective catalytic reduction devices (SCR) and systems incorporating the same are provided. Systems can include a SCR configured to receive reductant at a variable dosing rate, an upstream NOx sensor, and a downstream NOx sensor. Methods can include correlating a SCR reductant dosing signal direction with a SCR downstream NOx signal direction, and determining one or more of NOx breakthrough through the SCR and reductant slip through the SCR. Methods can further comprise identifying reductant slip through the SCR using an upstream NOx sensor signal and a downstream NOx sensor signal. Methods can further comprise comparing an upstream NOx signal to a downstream NOx signal, determining a system objective, and adapting the SCR reductant dosing rate to achieve the system objective in order to identify a faulty upstream NOx sensor.
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公开(公告)号：US09988962B2
公开(公告)日：2018-06-05
申请号：US15071668
申请日：2016-03-16
CPC分类号： F01N9/002 , F01N3/021 , F01N3/023 , F01N3/027 , F01N11/002 , F01N2550/04 , F01N2560/08 , F01N2900/0408 , F01N2900/0416 , F01N2900/0422 , F01N2900/08 , F01N2900/1406 , F01N2900/1606
摘要： An exhaust emission control system of an internal combustion engine may include a filter, a temperature raising device, a differential pressure detecting device, and an electronic control unit. The filter may include a first region as a part of the filter, and a second region as another part of the filter. The electronic control unit may be configured to calculate a first deposition amount such that a calculated deposition amount is larger as a proportion of a magnitude of the first differential pressure reduction amount to the length of the first oxidation period is larger. The electronic control unit may be configured to calculate an amount of the particulate matter deposited in the second region based on a length of the second oxidation period and a second differential pressure reduction amount.
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公开(公告)号：US20180142593A1
公开(公告)日：2018-05-24
申请号：US15359857
申请日：2016-11-23
CPC分类号： F01N3/208 , B01D53/9431 , B01D53/9495 , F01N3/2066 , F01N9/005 , F01N11/007 , F01N13/0093 , F01N2550/02 , F01N2550/05 , F01N2560/026 , F01N2610/02 , F01N2610/146 , F01N2900/0404 , F01N2900/0408 , F01N2900/0601 , F01N2900/1402 , F01N2900/1616 , F01N2900/1621 , F01N2900/1622 , F01N2900/1812
摘要： Disclosed are model predictive control (MPC) systems, methods for using such MPC systems, and motor vehicles with selective catalytic reduction (SCR) employing MPC control. An SCR-regulating MPC control system is disclosed that includes an NOx sensor for detecting nitrogen oxide (NOx) input received by the SCR system, catalyst NOx sensors for detecting NOx output for two SCR catalysts, and catalyst NH3 sensors for detecting ammonia (NH3) slip for each SCR catalyst. The MPC system also includes a control unit programmed to: receive desired can conversion efficiencies for the SCR catalysts; determine desired can NOx outputs for the SCR catalysts; determine maximum NH3 storage capacities for the SCR catalyst; calculate the current can conversion efficiency for each SCR catalyst; calculate an optimized reductant pulse-width and/or volume from the current can conversion efficiencies; and, command an SCR dosing injector to inject a reductant into an SCR conduit based on the calculated pulse-width/volume.
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公开(公告)号：US09951673B2
公开(公告)日：2018-04-24
申请号：US15042784
申请日：2016-02-12
IPC分类号： F01N3/00 , F01N3/02 , F01N3/10 , F01N3/20 , F01N11/00 , F01N3/023 , F01N3/025 , F01N3/08 , F01N9/00 , F01N5/02
CPC分类号： F01N11/007 , F01N3/0234 , F01N3/0253 , F01N3/0842 , F01N3/0864 , F01N3/0871 , F01N3/106 , F01N3/2013 , F01N3/2033 , F01N3/206 , F01N5/02 , F01N9/002 , F01N2240/02 , F01N2240/16 , F01N2240/30 , F01N2250/02 , F01N2550/02 , F01N2560/025 , F01N2560/026 , F01N2560/06 , F01N2560/08 , F01N2570/14 , F01N2570/16 , F01N2610/03 , F01N2610/10 , F01N2900/0408 , F01N2900/0411 , F01N2900/0416 , F01N2900/0602 , F01N2900/14 , F01N2900/1402 , Y02A50/2344 , Y02T10/16 , Y02T10/26 , Y02T10/47
摘要： An aftertreatment device for reducing NOx, PM, HC, and CO generated by a compression-ignition engine. In this device, lean exhaust air generated in the engine is enriched using a reactor together with an oxygen sorption device according to a target deNOx efficiency value, and heat energy is recovered. The enriched exhaust gas then passes through an oxidation catalyst, where NOx is reduced with CO and HC. PM in the exhaust gas is further trapped in a DPF. To lower energy cost, an heat exchanger is used for more effectively heating the DPF during regeneration, and an exhaust gas compressor positioned upstream from the DPF is employed to control engine back pressure. When exhaust gas temperature is low, to regenerate the DPF with minimum energy consumption, an electrical heater is used to heat dosing fuel before it is mixed with exhaust gas, and a regeneration heating process is then jump-started.
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公开(公告)号：US09945277B2
公开(公告)日：2018-04-17
申请号：US15228477
申请日：2016-08-04
发明人： Hiroyuki Tanaka
CPC分类号： F01N3/101 , F01N3/0842 , F01N3/2066 , F01N3/2073 , F01N2430/06 , F01N2560/025 , F01N2560/026 , F01N2560/14 , F01N2610/02 , F01N2900/0408 , F01N2900/1402 , F01N2900/1614 , F01N2900/1622 , F01N2900/1624 , F02D41/0235 , F02D41/028 , F02D41/1441 , F02D41/1455 , F02D2200/0806 , F02D2200/0808 , F02D2200/0814 , Y02T10/22
摘要： A three-way catalyst, an NSR catalyst, and an SCR catalyst are provided in this order for an exhaust gas passage, wherein the air-fuel ratio (AFR) is set to a first AFR which is a rich AFR before the AFR is switched from a theoretical AFR to a lean AFR, and then the AFR is set to a second AFR which is higher than the first AFR and lower than the theoretical AFR if a NOx occlusion amount is less than a threshold value during a period until an NH3 adsorption amount of the SCR catalyst becomes a predetermined adsorption amount, while the AFR is set to a third AFR which is higher than the first AFR and lower than the second AFR if the NOx occlusion amount is not less than the threshold value.
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公开(公告)号：US09869223B2
公开(公告)日：2018-01-16
申请号：US14466289
申请日：2014-08-22
CPC分类号： F01N3/046 , F01N9/00 , F01N13/105 , F01N2260/024 , F01N2900/0408 , F01N2900/08 , F01N2900/1631 , F01P7/16 , Y02T10/20 , Y02T10/47
摘要： A method is disclosed for optimizing fuel economy during an engine warm up phase of operation of an internal combustion engine. An exhaust manifold may have a coolant jacket through which a coolant may flow. A temperature of the coolant in the exhaust manifold may be determined to detect when it is at a predetermined maximum threshold, which represents a temperature threshold just below a temperature at which the coolant will begin to boil. When this threshold is reached, then a determination may be made as to a minimum rate of flow of the coolant through the exhaust manifold which maintains the coolant at about the predetermined maximum threshold, and the coolant may be flowed through the exhaust manifold at the determined minimum rate of flow.
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公开(公告)号：US09863354B2
公开(公告)日：2018-01-09
申请号：US15083378
申请日：2016-03-29
发明人： Shuntaro Okazaki , Kenji Suzuki , Hiroshi Miyamoto , Yuji Miyoshi
CPC分类号： F02D41/1495 , F01N3/101 , F01N11/007 , F01N13/0093 , F01N2550/00 , F01N2560/025 , F01N2610/03 , F01N2900/0408 , F01N2900/0416 , F01N2900/0418 , F01N2900/1402 , F01N2900/1624 , F02D41/0295 , F02D41/1408 , F02D41/1441 , F02D41/1454 , F02D41/1456 , F02D41/1475 , F02D41/222 , F02D2200/0814 , F02D2200/0816 , Y02T10/22 , Y02T10/47
摘要： An exhaust purification system comprises an exhaust purification catalyst, a downstream side air-fuel ratio sensor and a control device. The control device makes the air-fuel ratio of the exhaust gas change to an air-fuel ratio at a rich side from the prior air-fuel ratio as air-fuel ratio rich increasing control when the air-fuel ratio of the exhaust gas is made a rich air-fuel ratio and the output air-fuel ratio of the downstream side air-fuel ratio sensor is maintained at a lean judged air-fuel ratio or more, and judges that the downstream side air-fuel ratio sensor suffers from an abnormality, when, due to the air-fuel ratio rich increasing control, the air-fuel ratio of the exhaust gas is made to change to the rich side air-fuel ratio and the output air-fuel ratio of the downstream side air-fuel ratio sensor changes to the lean side.
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