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Patent Agency Ranking
1.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
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： David Edwards , Sarah Funk , Po-I Lee
IPC: F01N3/20
CPC classification number: F01N3/208 , F01N3/2066 , F01N11/00 , F01N11/002 , F01N2550/02 , F01N2560/026 , F01N2610/02 , F01N2900/0408 , F01N2900/1402 , F01N2900/1616 , F01N2900/1622 , Y02T10/47
Abstract: 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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2.发明申请公开(公告)号：US20180258813A1
公开(公告)日：2018-09-13
申请号：US15451447
申请日：2017-03-07
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： David P. Quigley , David Edwards , Sarah Funk , Anirban Sett
Abstract: Disclosed are SCR predictive control systems, methods for using such control systems, and motor vehicles with SCR employing predictive control. A method for regulating operation of an SCR system includes receiving sensor signals indicative of NOx output downstream from an SCR catalyst, and sensor signals indicative of exhaust gas temperature upstream from the SCR catalyst. The method determines if a model error condition has occurred for the NOx output signal and, responsive to such an occurrence, modulating dosing injector output for at least a calibrated designated time period. Upon expiration of the designated time period, the dosing injector is activated and commanded to inject reductant in accordance with a modulated dosing value. After the dosing injector injects the modulated dosing value of reductant, the method determines if the SCR system is underdosing or overdosing based on a response shape of signals received from the outlet NOx content sensor.
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3.发明授权公开(公告)号：US10082061B1
公开(公告)日：2018-09-25
申请号：US15451447
申请日：2017-03-07
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： David P. Quigley , David Edwards , Sarah Funk , Anirban Sett
Abstract: Disclosed are SCR predictive control systems, methods for using such control systems, and motor vehicles with SCR employing predictive control. A method for regulating operation of an SCR system includes receiving sensor signals indicative of NOx output downstream from an SCR catalyst, and sensor signals indicative of exhaust gas temperature upstream from the SCR catalyst. The method determines if a model error condition has occurred for the NOx output signal and, responsive to such an occurrence, modulating dosing injector output for at least a calibrated designated time period. Upon expiration of the designated time period, the dosing injector is activated and commanded to inject reductant in accordance with a modulated dosing value. After the dosing injector injects the modulated dosing value of reductant, the method determines if the SCR system is underdosing or overdosing based on a response shape of signals received from the outlet NOx content sensor.
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公开(公告)号：US09909482B2
公开(公告)日：2018-03-06
申请号：US15212307
申请日：2016-07-18
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Michelangelo Ardanese , David Edwards , Charles E. Dean
CPC classification number: F01N11/002 , F01N3/021 , F01N3/023 , F01N3/103 , F01N3/2066 , F01N9/002 , F01N2430/085 , F01N2560/06 , F01N2560/14 , F01N2900/0408 , F01N2900/1404 , F01N2900/1411 , F01N2900/1621 , F01N2900/1631
Abstract: A system and method for evaluating the efficiency of an oxidation catalyst of a vehicle exhaust system includes a diagnostic control system including a controller operatively connected to the exhaust system and at least one temperature sensor disposed proximate the oxidation catalyst to measure the temperature of the exhaust gas. The controller determines an operating state of at least one of the engine and exhaust system and initiates a particulate filter regeneration process in response to the detected operating state. The controller defines a first diagnostic index value and calculates a second diagnostic index value based upon the first diagnostic index value and an offset value. An oxidation catalyst efficiency validation module determines the efficiency of the oxidation catalyst.
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公开(公告)号：US20180016962A1
公开(公告)日：2018-01-18
申请号：US15212307
申请日：2016-07-18
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Michelangelo Ardanese , David Edwards , Charles E. Dean
CPC classification number: F01N11/002 , F01N3/021 , F01N3/023 , F01N3/103 , F01N3/2066 , F01N9/002 , F01N2430/085 , F01N2560/06 , F01N2560/14 , F01N2900/0408 , F01N2900/1404 , F01N2900/1411 , F01N2900/1621 , F01N2900/1631
Abstract: A system and method for evaluating the efficiency of an oxidation catalyst of a vehicle exhaust system includes a diagnostic control system including a controller operatively connected to the exhaust system and at least one temperature sensor disposed proximate the oxidation catalyst to measure the temperature of the exhaust gas. The controller determines an operating state of at least one of the engine and exhaust system and initiates a particulate filter regeneration process in response to the detected operating state. The controller defines a first diagnostic index value and calculates a second diagnostic index value based upon the first diagnostic index value and an offset value. An oxidation catalyst efficiency validation module determines the efficiency of the oxidation catalyst.
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