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公开(公告)号：US20200291906A1
公开(公告)日：2020-09-17
申请号：US16354690
申请日：2019-03-15
Applicant: GM Global Technology Operations LLC
Inventor： Michael A. Smith , Robert J. Gallon , Michael P. Kaczmar , Martino A. Casetti , Eric M. Hall
Abstract: An engine includes an air intake system, an exhaust system, a single-cylinder-sourced EGR system, an exhaust sensor that is disposed to monitor exhaust gas from the single one of the cylinders, and a diverter valve. A controller includes an instruction set that executable to determine operation of the engine in a fuel cut-off mode, discontinue fuel flow to the single one of the cylinders, divert exhaust gas from the single one of the cylinders to the air intake system, determine an airflow, temperature, and an equivalence ratio of the diverted exhaust gas from the single one of the cylinders, determine a mass flowrate of oxygen in the diverted exhaust gas, integrate the mass flowrate of oxygen in the diverted exhaust gas, and discontinue the diverting of the exhaust gas from the single one of the cylinders when the integrated mass flowrate of oxygen is greater than a threshold value.
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32.发明授权公开(公告)号：US10358966B2
公开(公告)日：2019-07-23
申请号：US15711304
申请日：2017-09-21
Applicant: GM Global Technology Operations LLC
Inventor： Michael A. Smith , Christopher L. Whitt , Sarah Funk , Shouxian Ren
Abstract: Technical solutions are described for limiting exposure of components of an emissions control system to rich exhaust conditions. An example an emissions control system includes an oxygen storage component; and a controller that limits exposure of the oxygen storage component to rich exhaust conditions. The limiting includes determining an air-to-fuel equivalence ratio in exhaust gas in response to an engine receiving a request to generate torque, the request including a displacement of a pedal; determining an amount of oxygen in the exhaust gas based on the air-to-fuel equivalence ratio; determining an oxygen level stored by the oxygen storage component; and if the oxygen level is above a predetermined threshold, lowering a torque generation rate of the engine, which specifies amount of torque generated per unit displacement of the pedal.
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33.发明授权公开(公告)号：US10323561B2
公开(公告)日：2019-06-18
申请号：US15491000
申请日：2017-04-19
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Michael A. Smith , Charles E. Dean , Raffaele Esposito
Abstract: Methods for monitoring thermal characteristics of oxidation catalyst (OC) catalytic composition(s) (CC) are provided, and comprise communicating exhaust gas to the OC, and determining a temperature change of the CC for the time frame based on a plurality of heat sources including heat imparted to the CC from exhaust gas enthalpy, heat imparted to the CC via oxidation of HC and/or CO in exhaust gas, heat imparted to the CC via water present in the exhaust gas condensing on the CC or heat removed from the CC via water evaporating from the CC, and optionally heat exchanged between the CC and the ambient environment. Heat imparted to the CC via water condensing on the CC can be determined using an increasing relative humidity proximate the CC, and heat removed from the CC via water evaporating from the CC can be determined using a decreasing relative humidity proximate the CC.
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公开(公告)号：US20190178129A1
公开(公告)日：2019-06-13
申请号：US15834556
申请日：2017-12-07
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Sarah Funk , Michael A. Smith , Giuseppe Mazzara Bologna
Abstract: Selective catalytic reduction device (SCR) assessment methods include, while communicating exhaust to the SCR, determining a first temperature differential (dT) between a modeled exotherm phase temperature and a measured SCR exotherm outlet exhaust temperature, comparing the first dT to a first threshold, and determining that the SCR performance is suitable if the first dT is below the first threshold, or, if the first dT is above the first threshold, communicating exhaust gas to the SCR during a water endotherm phase, determining a second dT between a modeled endotherm phase temperature and a measured SCR endotherm phase outlet exhaust temperature, comparing the second dT to a second threshold, and determining that the SCR performance is suitable if the second dT is above the second threshold, or determining that the SCR performance is unsuitable if the second dT is below the second threshold. Performance can be SCR reductant storage capacity.
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公开(公告)号：US20190093534A1
公开(公告)日：2019-03-28
申请号：US15713999
申请日：2017-09-25
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Bryan D. Axe , Michael A. Smith
IPC: F01N3/20
CPC classification number: F01N3/208 , F01N2260/00 , F01N2610/02 , F01N2610/144 , F01N2610/146 , F01N2900/08 , F01N2900/10 , F01N2900/1812 , F01N2900/1821
Abstract: Provided is a method for controlling a vehicle exhaust gas treatment system, wherein the system includes an engine and a selective catalytic reduction device configured to receive exhaust gas from the engine and reductant from an injector. The method comprises determining a need for a reductant injection, determining a need for reductant injector noise abatement, and subsequently conducting one or more reductant injection events during one or more engine combustion events. A vehicle combustion event comprises combustion of fuel within a cylinder of the ICE. Determining a need for reductant injector noise abatement comprises determining if an engine speed is below a threshold, if a speed of the vehicle is below a threshold, if a decibel level of a vehicle audio system is below a threshold, or if a hands-free telephone system is being utilized by a passenger of the vehicle. The engine can be a diesel engine.
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Patent Agency Ranking
公开(公告)号：US10233811B2
公开(公告)日：2019-03-19
申请号：US15470327
申请日：2017-03-27
Applicant: GM Global Technology Operations LLC
Inventor： Michael A. Smith , Pu Sun , Harish Kohli
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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37.发明申请公开(公告)号：US20190024554A1
公开(公告)日：2019-01-24
申请号：US15655398
申请日：2017-07-20
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Michael A. Smith , Luca Lauritano , Luis Daniel Guerrero Cruz , Claudio Ciaravino , Gongshin Qi
CPC classification number: F01N3/0814 , C01B39/02 , F01N3/0293 , F01N3/035 , F01N3/208 , F01N9/002 , F01N9/005 , F01N2610/02 , F01N2900/1411 , F01N2900/1606 , F02D41/0235 , F02D41/029 , F02D2200/0812
Abstract: A method of adjusting reductant injection for a selective catalyst reduction device with a soot filter (SCRF) includes calculating, through a processor, an amount of soot in the SCRF, determining, through the processor, a shrinking core model of the SCRF based on the amount of soot, calculating, with the processor using the shrinking core model, an amount of reductant to inject into the SCRF, and injecting the amount of reductant into the SCRF.
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38.发明申请公开(公告)号：US20180274421A1
公开(公告)日：2018-09-27
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.
IPC: F01N3/20
CPC classification number: F01N3/2066 , F01N3/021 , F01N3/2013 , F01N9/00 , F01N2260/04 , F01N2570/00 , F01N2610/02 , F01N2900/1602 , F01N2900/1622 , Y02T10/24 , Y02T10/26 , Y02T10/47
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：US11654747B2
公开(公告)日：2023-05-23
申请号：US16784799
申请日：2020-02-07
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Michael A. Smith , Eugene V. Gonze , Richard J. Lopez
CPC classification number: B60H1/00885 , B60H1/03 , B60H1/14 , F01P3/20 , F01P7/165 , B60H2001/3267 , F01P2060/04 , F01P2060/045 , F01P2060/08 , F01P2060/12
Abstract: A system for controlling fluid temperature in a thermal system includes a heat source, a heat sink coupled to the heat source, a first heat exchanger and a second heat exchanger, a first expansion valve configured to regulate the flow of coolant between the heat source and the first heat exchanger, a second expansion valve configured to regulate the flow of coolant between the heat source and the second heat exchanger, and a controller. The controller is configured to determine an operating condition of the thermal system and generate a first control signal to control the first and second expansion valves to direct the flow of coolant to the first and second heat exchangers. The first and second expansion valves are arranged in parallel to recover heat rejected from the coolant and distribute the recovered heat to the first and second heat exchangers.
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公开(公告)号：US11118491B1
公开(公告)日：2021-09-14
申请号：US17060241
申请日：2020-10-01
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： William D. Gough , Michael A. Smith , Vijay A. Ramappan , Timothy Wendling
Abstract: A regeneration system for a vehicle includes: a particulate module configured to determine an amount of particulate trapped within a particulate filter, the particulate filter configured to filter particulate from exhaust output from an engine; and a regeneration control module configured to, in response to a determination that the amount of particulate trapped within the particulate filter is at least a predetermined amount: close a wastegate of a turbocharger; and open an EGR valve connected (a) to an intake system of the engine downstream of the turbocharger and (b) to upstream of the particulate filter, the closing of the wastegate and the opening of the EGR valve flowing air from (a) the intake system to (b) upstream of the particulate filter through the EGR valve without the air entering the engine.
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