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11.发明授权公开(公告)号：US10215072B2
公开(公告)日：2019-02-26
申请号：US15467312
申请日：2017-03-23
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Michael A. Smith , Praveen S. Chavannavar , Po-I Lee , Sarah Funk , Thomas LaRose, Jr.
Abstract: Method for controlling and detecting ammonium nitrate and/or ammonium nitrite poisoning within selective catalytic reduction (SCR) devices and systems incorporating the same are provided. Methods can include detecting a SCR inlet exhaust gas NO2:NOx ratio above a poisoning NOx flux threshold, detecting a SCR temperature below a poisoning temperature threshold, and determining SCR catalyst poisoning. Methods can further include performing a SCR catalyst cleaning strategy, wherein the SCR cleaning strategy comprises heating the SCR catalyst composition to a temperature above the poisoning temperature threshold. Cleaning strategies can including utilizing a heater, implementing a post-injection, after-injection, and/or auxiliary injection engine strategy wherein the engine is configured to supply exhaust gas to the SCR. Methods can further include arresting reductant dosing, identifying an opportunistic regeneration opportunity, and/or inhibiting performance of an appurtenant oxidation catalyst subsequent to determining SCR catalyst poisoning. The SCR catalyst composition can comprise iron and/or copper.
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公开(公告)号：US20180291783A1
公开(公告)日：2018-10-11
申请号：US15481941
申请日：2017-04-07
Applicant: GM Global Technology Operations LLC
Inventor： Michael A. Smith , David P. Quigley , Sarah Funk , Enrik Fetolli
CPC classification number: F01N3/208 , F01N3/0814 , F01N3/2066 , F01N9/00 , F01N11/002 , F01N2610/02 , F01N2900/1602 , F01N2900/1616 , F01N2900/1622 , Y02A50/2325 , Y02T10/20 , Y02T10/24 , Y02T10/47
Abstract: A vehicle includes an engine that combusts an air/fuel mixture to produce an exhaust gas stream containing oxides of nitrogen (NOx). A dosing system injects an amount of ammonia (NH3) into the exhaust gas stream based on an initial NH3 injection set point value. A selective catalyst reduction (SCR) device absorbs an amount of the NH3 contained in the exhaust gas stream and reduces an amount of NOx. An electronic hardware controller predicts an NH3 slip condition during which a portion the absorbed NH3 will slip from the SCR device, and modifies the initial NH3 injection set point value based on the predicted NH3 slip condition. The controller further generates a modified NH3 injection set point signal indicating an adjusted amount of the NH3 to inject during the predicted NH3 slip condition. The dosing system adjusts the amount of injected NH3 based on the modified NH3 injection set point signal.
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公开(公告)号：US20180274422A1
公开(公告)日：2018-09-27
申请号：US15470327
申请日：2017-03-27
Applicant: GM Global Technology Operations LLC
Inventor： Michael A. Smith , Pu Sun , Harish Kohli
CPC classification number: F01N3/2066 , F01N3/021 , F01N3/023 , F01N3/035 , F01N3/106 , F01N9/002 , F01N9/005 , F01N13/009 , F01N2610/02 , F01N2610/148 , F01N2900/08 , F01N2900/1606 , F01N2900/1616 , F01N2900/1622 , Y02A50/2325 , Y02T10/24 , Y02T10/47
Abstract: An engine control system includes a selective catalyst reduction (SCR) device that reduces nitrogen oxide (NOx) in exhaust gas in the presence of the reductant. A particulate filter (PF) is disposed downstream from the SCR device to collect particulate matter from the exhaust gas stream. The engine control system further includes an electronic hardware that calculates a particulate matter load value indicating an amount of particulate matter collected in the PF, and calculate a CCB value that compensates for pressure differential variations across the PF. The controller further calculates a CCB correction value that modifies the CCB value and compensates for an amount of reductant that slips from the SCR device and induces the pressure differential variations. In this manner, the electronic hardware controller can control a regeneration system to increase the temperature of the PF to burn off particulate matter from the PF based on the modified CCB value.
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公开(公告)号：US20180038298A1
公开(公告)日：2018-02-08
申请号：US15225972
申请日：2016-08-02
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Charles E. Dean , Michael A. Smith , Michelangelo Ardanese , Jon C. Miller
CPC classification number: F02D41/029 , F01N3/021 , F01N3/027 , F01N3/035 , F01N3/208 , F01N9/002 , F01N11/002 , F01N11/007 , F01N2550/04 , F01N2900/0418 , F01N2900/10 , F01N2900/14 , F02D41/04 , F02D41/405 , Y02A50/2325 , Y02T10/24 , Y02T10/47
Abstract: A method for controlling an exhaust gas treatment system is provided. The exhaust gas treatment system includes an exhaust gas stream supplied by an exhaust gas source to a selective catalytic reduction device and a particulate filter device. Additionally or alternatively, the exhaust gas treatment system includes an exhaust gas stream supplied by an exhaust gas source to a selective catalytic reduction filter device. The method comprises initiating a selective catalytic reduction device service in response to a reductant dosing adaptation. The method can further include satisfying a secondary condition prior to initiating a selective catalytic reduction device service. The device service can include increasing the exhaust gas temperature or initiating an active regeneration of the particulate filter device.
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公开(公告)号：US20210372332A1
公开(公告)日：2021-12-02
申请号：US16887955
申请日：2020-05-29
Applicant: GM Global Technology Operations LLC
Inventor： Michael Kaczmar , Michael A. Smith , Amanda Keech , Pratap S. Murthy , Jason M. Moore
Abstract: An automobile vehicle overhead camshaft system includes multiple camshafts individually having multiple sliding camshaft barrels. Opposed ends of the camshaft barrels individually have a zero-lift lobe. Multiple intake valves are operated by a first one of the camshafts and multiple exhaust valves are operated by a second one of the camshafts. Multiple actuators operate during a deceleration cylinder cut-off (DCCO) mode to slidably displace the camshaft barrels to position the zero-lift lobe of predetermined ones of the multiple sliding camshaft barrels into contact with at least one of: all of the intake valves; or all of the exhaust valves.
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Patent Agency Ranking
公开(公告)号：US11168627B2
公开(公告)日：2021-11-09
申请号：US16686728
申请日：2019-11-18
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Michael A. Smith , Dale A. Frank , Ryan J. Prescott , Manoj K. Moningi , Michael J. Lucido , Vijay Ramappan
IPC: F02D41/00 , F02D41/14 , F02D41/22 , F02D41/30 , F02D17/02 , F02D13/06 , F02D41/34 , F01L13/00 , F02D41/24
Abstract: Systems and methods are provided for determining and correcting air/fuel imbalance between cylinders of an internal combustion engine. A deactivation strategy is determined and implemented. An evaluation is made of whether the engine is operating with an air/fuel imbalance between cylinders. When an imbalance is identified, an alternate deactivation strategy is implemented. Based on outcomes of the alternate deactivation strategy, a source cylinder of the air/fuel imbalance is identified, and fuel flow to the source cylinder is corrected.
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17.发明授权公开(公告)号：US10690079B2
公开(公告)日：2020-06-23
申请号：US15838860
申请日：2017-12-12
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Michael A. Smith , Sarah Funk , David E. Edwards , Min Sun , Gongshin Qi
Abstract: An emissions control system for treating exhaust gas containing NOx emissions from an internal combustion engine comprises a selective catalytic reduction (SCR) device that stores reductant that reacts with the NOx emissions, a reductant supply system configured to inject the reductant according to a reductant storage model; NOx module(s) configured to generate an NOx concentration signal indicating an NOx concentration, temperature module(s) configured to generate a temperature signal indicating an SCR temperature of the SCR device, and a control module operably connected to the reductant supply system, the NOx module, and the temperature module. The control module is configured to determine an amount of the reductant that is parasitically oxidized based on the NOx concentration signal and the temperature signal, and to determine a correction factor based on the amount of parasitically oxidized reductant to modify the reductant storage model.
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18.发明申请公开(公告)号：US20190178187A1
公开(公告)日：2019-06-13
申请号：US15838860
申请日：2017-12-12
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Michael A. Smith , Sarah Funk , David E. Edwards , Min Sun , Gongshin Qi
Abstract: An emissions control system for treating exhaust gas containing NOx emissions from an internal combustion engine comprises a selective catalytic reduction (SCR) device that stores reductant that reacts with the NOx emissions, a reductant supply system configured to inject the reductant according to a reductant storage model; NOx module(s) configured to generate an NOx concentration signal indicating an NOx concentration, temperature module(s) configured to generate a temperature signal indicating an SCR temperature of the SCR device, and a control module operably connected to the reductant supply system, the NOx module, and the temperature module. The control module is configured to determine an amount of the reductant that is parasitically oxidized based on the NOx concentration signal and the temperature signal, and to determine a correction factor based on the amount of parasitically oxidized reductant to modify the reductant storage model.
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公开(公告)号：US20190162094A1
公开(公告)日：2019-05-30
申请号：US15827133
申请日：2017-11-30
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Michael A. Smith , Giuseppe Mazzara Bologna , Giulio Binetti
CPC classification number: F01N3/208 , B01D53/9431 , B01D53/9495 , B01D2255/911 , B01D2255/915 , F01N3/035 , F01N9/005 , F01N2570/18 , F01N2610/02 , F01N2900/1614
Abstract: A method, control system, and vehicle system configured to control a selective catalyst reduction (SCR) system subtracts an amount of NOx present in a tailpipe upstream of the SCR system from an amount of NOx present in the tailpipe downstream of the SCR injector. A cumulative difference may be determined based on integrating the subtracted NOx value. The method, control system, and vehicle system are configured to determine whether the cumulative difference exceeds a control threshold, and to set a selected upstream NOx value as a predetermined model upstream NOx amount if the cumulative difference exceeds the control threshold, but to set the selected upstream NOx value as the determined upstream NOx amount if the cumulative difference does not exceed the control threshold. Thus, the system is reset to the model when downstream NOx values exceed upstream NOx values above a threshold, to bring the system back within control.
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公开(公告)号：US10247076B2
公开(公告)日：2019-04-02
申请号：US15481941
申请日：2017-04-07
Applicant: GM Global Technology Operations LLC
Inventor： Michael A. Smith , David P. Quigley , Sarah Funk , Enrik Fetolli
Abstract: A vehicle includes an engine that combusts an air/fuel mixture to produce an exhaust gas stream containing oxides of nitrogen (NOx). A dosing system injects an amount of ammonia (NH3) into the exhaust gas stream based on an initial NH3 injection set point value. A selective catalyst reduction (SCR) device absorbs an amount of the NH3 contained in the exhaust gas stream and reduces an amount of NOx. An electronic hardware controller predicts an NH3 slip condition during which a portion the absorbed NH3 will slip from the SCR device, and modifies the initial NH3 injection set point value based on the predicted NH3 slip condition. The controller further generates a modified NH3 injection set point signal indicating an adjusted amount of the NH3 to inject during the predicted NH3 slip condition. The dosing system adjusts the amount of injected NH3 based on the modified NH3 injection set point signal.
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