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公开(公告)号：US11441492B2
公开(公告)日：2022-09-13
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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公开(公告)号：US11098666B1
公开(公告)日：2021-08-24
申请号：US17035088
申请日：2020-09-28
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Michael A. Smith , Vijay A. Ramappan , Michael J. Lucido , Jeffrey M. Hutmacher , Scott T. Feldmann , Randy L. Dufresne
Abstract: A system includes a three-way catalyst (TWC) sulfur load module, a cylinder/fuel cutoff module, a fuel control module, and a valve control module. The TWC sulfur load module is configured to determine an amount of sulfur deposited on a three-way catalyst of an engine in a vehicle. The cylinder/fuel cutoff module is configured to determine whether to enable deceleration cylinder cutoff (DCCO) based on the amount of sulfur deposited on the three-way catalyst. The fuel control module is configured to control a fuel injector to selectively stop fuel injection in the engine when DCCO is enabled. The valve control module is configured to selectively maintain intake and exhaust valves of the engine in a closed position when DCCO is enabled.
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公开(公告)号：US20210148293A1
公开(公告)日：2021-05-20
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
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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公开(公告)号：US10975753B2
公开(公告)日：2021-04-13
申请号：US16526357
申请日：2019-07-30
Applicant: GM Global Technology Operations LLC
Inventor： Michael A. Smith , Martino A. Casetti , Michael Kaczmar , Scott R. Jeffrey
Abstract: A method for operating an exhaust gas recirculation system using rationality diagnostics for an automobile vehicle includes: estimating an oxygen storage content (OSC) of a catalytic converter of a vehicle; comparing an amount of oxygen stored in the catalytic converter to an OSC threshold; initiating a closed oxygen storage control (COSC) event for a predetermined one of multiple cylinders of an engine of a vehicle if the OSC threshold is met or exceeded, the COSC event targeting a rich air-fuel equivalence ratio (EQR) for the predetermined one of the multiple cylinders; and directing a fuel injector communicating with the predetermined one of the multiple cylinders to operate the predetermined one of the multiple cylinders at the rich EQR.
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公开(公告)号：US20200291877A1
公开(公告)日：2020-09-17
申请号：US16299792
申请日：2019-03-12
Applicant: GM Global Technology Operations LLC
Inventor： Michael A. Smith , Po-I Lee , Richard A. Barkman , Eugene V. Gonze
Abstract: A method for controlling an engine thermal target setpoint, includes: identifying in a first step an initial NOx integral at an initial calculated cylinder wall temperature and a thermal set point of an engine coolant; initiating a command in a second step to change the initial cylinder wall temperature and to change the thermal set point of the engine coolant; creating in a third step a new NOx integral at a new cylinder wall temperature and a modified thermal set point of the engine coolant; and comparing in a fourth step: is (the new NOx integral minus the initial NOx integral) greater than a predefined minimum threshold; and is (the new NOx integral minus the initial NOx integral) less than a predefined maximum threshold.
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Patent Agency Ranking
公开(公告)号：US20190390589A1
公开(公告)日：2019-12-26
申请号：US16017141
申请日：2018-06-25
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Christopher L. Whitt , Michael A. Smith , Shouxian Ren
Abstract: According to one or more embodiments described herein, an exhaust system for treating exhaust gas from an internal combustion engine in a motor vehicle includes a passive NOx absorber (PNA) device, and a model-based controller that controls an amount of NOx stored by the PNA device. Controlling of the amount of NOx stored includes computing a predicted NOx storage level of the PNA device using a prediction model of the PNA device, and in response to the predicted NOx storage level of the PNA device being greater than a predetermined cold-start threshold, raising a temperature of the exhaust gas by changing an operation of the internal combustion engine.
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公开(公告)号：US10450924B2
公开(公告)日：2019-10-22
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：US10400644B2
公开(公告)日：2019-09-03
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
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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公开(公告)号：US10329995B1
公开(公告)日：2019-06-25
申请号：US15868298
申请日：2018-01-11
Applicant: GM Global Technology Operations LLC
Inventor： Thomas Larose, Jr. , Nicholas Girardi , Douglas C. Sarsen , Michael A. Smith
CPC classification number: F01P7/165 , F01N5/02 , F01P3/20 , F01P5/12 , F01P7/04 , F01P7/164 , F01P7/167 , F01P2003/005 , F01P2005/125 , F01P2007/146
Abstract: A coolant control system of a vehicle includes a coolant pump that pumps coolant to a heat exchanger. A diesel exhaust fluid (DEF) injector injects a DEF into an exhaust system and receives coolant output from the heat exchanger. A fuel heat exchanger transfers heat between coolant and fuel flowing through the fuel heat exchanger. An engine control module is configured to determine a first requested speed for DEF injector cooling, determine a second requested speed for fuel cooling, and based on at least one of the first and second requested speeds, selectively increase at least one of: opening of a valve that controls a flow rate of fuel flowing from the fuel rail to the fuel tank, a flow rate of fuel from fuel injectors of an engine to the fuel tank, and a target speed of the coolant pump.
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公开(公告)号：US10322373B2
公开(公告)日：2019-06-18
申请号：US15260787
申请日：2016-09-09
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Jon C. Miller , Michael A. Smith
IPC: F01N3/20 , F01N9/00 , B01D53/94 , B01D53/96 , F01N11/00 , F01N13/00 , F01N3/021 , F01N3/023 , F01N3/027 , F01N3/035
Abstract: Provided is a method for controlling an exhaust gas treatment system, wherein the system includes an exhaust gas stream supplied by an exhaust gas source to a selective catalytic reduction (SCR) device and a particulate filter device. The method comprises detecting a threshold level of reductant deposits proximate the SCR device, and initiating a selective catalytic reduction device service in response thereto. A threshold level of reductant deposits is detected using a reductant deposit model comprising determining an actual SCR NOx conversion using measured process variables; and comparing the actual SCR NOx conversion to a calibrated NOx conversion value. The calibrated NOx conversion value is determined using exhaust gas flow and system temperature values which substantially correspond to the process variables under which the actual SCR NOx conversion was determined. The device service can include increasing the exhaust gas temperature or initiating an active regeneration of the particulate filter device.
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