Patents by Inventor Gregory P. Matthews
Gregory P. Matthews has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 10934960Abstract: A method and system for estimating air mass per cylinder of an internal combustion engine is provided. An output signal from a MAF sensor is digitally processed to provide an estimate air mass per cylinder (APC). The system includes the MAF sensor; a data acquisition unit configured to receive an output signal from the MAF sensor and produce a sampled signal having a sampling rate greater than one sample per firing event; a multiple band pass (MBP) filter configured to remove signal components caused by airflow pulsations and oscillations through the MAF sensor; an envelope detector configured to detect the lower and upper envelopes of the MBP filtered signal; a MAF estimator configured to estimate a mass airflow based on the detected lower and upper envelopes; a signal decimator; a low pass filter; and a APC converter to converted the low pass filtered signal into an estimated APC.Type: GrantFiled: November 2, 2018Date of Patent: March 2, 2021Assignee: GM GLOBAL TECHNOLOGY OPERATIONS LLCInventors: Zhijian J. Wu, Zhiping S. Liu, Ping Ge, Martino A. Casetti, Gregory P. Matthews
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Patent number: 10655550Abstract: An engine control system includes a prediction module that, during an exhaust stroke of a first cylinder of an engine, determines a predicted intake manifold pressure at an end of a next intake stroke of a second cylinder following the first cylinder in a firing order of the cylinders. An air per cylinder (APC) module determines a predicted mass of air that will be trapped within the second cylinder at the end of the next intake stroke of the second cylinder based on the predicted intake manifold pressure. A fueling module controls fueling of the second cylinder during the next intake stroke based on the predicted mass of air.Type: GrantFiled: July 13, 2015Date of Patent: May 19, 2020Assignee: GM GLOBAL TECHNOLOGY OPERATIONS LLCInventors: Christopher E. Whitney, Layne K. Wiggins, Rafat F. Hattar, Gary Robert Cygan, Jr., Ning Jin, Gregory P. Matthews
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Publication number: 20200141346Abstract: A method and system for estimating air mass per cylinder of an internal combustion engine is provided. An output signal from a MAF sensor is digitally processed to provide an estimate air mass per cylinder (APC). The system includes the MAF sensor; a data acquisition unit configured to receive an output signal from the MAF sensor and produce a sampled signal having a sampling rate greater than one sample per firing event; a multiple band pass (MBP) filter configured to remove signal components caused by airflow pulsations and oscillations through the MAF sensor; an envelope detector configured to detect the lower and upper envelopes of the MBP filtered signal; a MAF estimator configured to estimate a mass airflow based on the detected lower and upper envelopes; a signal decimator; a low pass filter; and a APC converter to converted the low pass filtered signal into an estimated APC.Type: ApplicationFiled: November 2, 2018Publication date: May 7, 2020Inventors: Zhijian J. Wu, Zhiping S. Liu, Ping Ge, Martino A. Casetti, Gregory P. Matthews
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Patent number: 10480435Abstract: A method of operating a dedicated-EGR engine includes providing a rich air-fuel mixture to a dedicated cylinder; combusting the rich air-fuel mixture in the dedicated cylinder; modeling the combustion of the rich air-fuel mixture in the dedicated cylinder; estimating the composition of the combustion products in the dedicated cylinder based on interpolation of chemical reaction models of stoichiometric and rich combustion. The method further includes mixing the combustion products from the dedicated cylinder with air to produce an intake mixture; estimating a mass fraction of reformate and a mass fraction of burned gas in the intake mixture; providing the intake mixture to the intake ports of all of the cylinders of the dedicated-EGR engine; combusting an air-fuel mixture in a non-dedicated cylinder of the engine; and controlling an engine control parameter based on the estimated mass fractions of reformate and burned gas in the intake mixture.Type: GrantFiled: March 21, 2018Date of Patent: November 19, 2019Assignee: GM Global Technology Operations LLCInventors: Jun-mo Kang, Gregory P. Matthews, Martino A. Casetti
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Publication number: 20190293011Abstract: A method of operating a dedicated-EGR engine includes providing a rich air-fuel mixture to a dedicated cylinder; combusting the rich air-fuel mixture in the dedicated cylinder; modeling the combustion of the rich air-fuel mixture in the dedicated cylinder; estimating the composition of the combustion products in the dedicated cylinder based on interpolation of chemical reaction models of stoichiometric and rich combustion. The method further includes mixing the combustion products from the dedicated cylinder with air to produce an intake mixture; estimating a mass fraction of reformate and a mass fraction of burned gas in the intake mixture; providing the intake mixture to the intake ports of all of the cylinders of the dedicated-EGR engine; combusting an air-fuel mixture in a non-dedicated cylinder of the engine; and controlling an engine control parameter based on the estimated mass fractions of reformate and burned gas in the intake mixture.Type: ApplicationFiled: March 21, 2018Publication date: September 26, 2019Inventors: Jun-mo Kang, Gregory P. Matthews, Martino A. Casetti
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Patent number: 10337441Abstract: An engine control system of a vehicle includes a cylinder control module a first air per cylinder (APC) module, an adjustment module, and a fuel control module. The cylinder control module determines a target fraction of activated cylinders of an engine. The first APC module determines a first APC value based on an intake manifold pressure and an air temperature. The adjustment module determines an APC adjustment value based on the target fraction of activated cylinders. The first APC module also determines a second APC value based on the first APC value and the APC adjustment value. The fuel control module controls fuel injection based on the second APC value and a target air/fuel mixture.Type: GrantFiled: June 9, 2015Date of Patent: July 2, 2019Assignee: GM GLOBAL TECHNOLOGY OPERATIONS LLCInventor: Gregory P. Matthews
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Publication number: 20170016407Abstract: An engine control system includes a prediction module that, during an exhaust stroke of a first cylinder of an engine, determines a predicted intake manifold pressure at an end of a next intake stroke of a second cylinder following the first cylinder in a firing order of the cylinders. An air per cylinder (APC) module determines a predicted mass of air that will be trapped within the second cylinder at the end of the next intake stroke of the second cylinder based on the predicted intake manifold pressure. A fueling module controls fueling of the second cylinder during the next intake stroke based on the predicted mass of air.Type: ApplicationFiled: July 13, 2015Publication date: January 19, 2017Inventors: Christopher E. WHITNEY, Layne K. Wiggins, Rafat F. Hattar, Gary Robert Cygan, JR., Ning Jin, Gregory P. Matthews
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Patent number: 9534550Abstract: A cylinder control system of a vehicle includes a cylinder control module and an air per cylinder (APC) prediction module. The cylinder control module determines a desired cylinder activation/deactivation sequence. The cylinder control module also activates and deactivates valves of cylinders of an engine based on the desired cylinder activation/deactivation sequence. The APC prediction module predicts an amount of air that will be trapped within a next activated cylinder in a firing order of the cylinders based on a cylinder activation/deactivation sequence of the last Q cylinders in the firing order. Q is an integer greater than one.Type: GrantFiled: March 13, 2013Date of Patent: January 3, 2017Assignee: GM Global Technology Operations LLCInventors: Gregory P. Matthews, Zhiping Steven Liu, Daniel G. Brennan
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Publication number: 20160363083Abstract: An engine control system of a vehicle includes a cylinder control module a first air per cylinder (APC) module, an adjustment module, and a fuel control module. The cylinder control module determines a target fraction of activated cylinders of an engine. The first APC module determines a first APC value based on an intake manifold pressure and an air temperature. The adjustment module determines an APC adjustment value based on the target fraction of activated cylinders. The first APC module also determines a second APC value based on the first APC value and the APC adjustment value. The fuel control module controls fuel injection based on the second APC value and a target air/fuel mixture.Type: ApplicationFiled: June 9, 2015Publication date: December 15, 2016Inventor: Gregory P. MATTHEWS
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Patent number: 9494092Abstract: A system according to the principles of the present disclosure includes an engine air sensor, an engine air prediction module, and an engine actuator module. The engine air sensor measures an engine air parameter at a first rate. The engine air parameter includes at least one of a mass flow rate of air flowing into an intake manifold of an engine, a pressure within the intake manifold, and a mass of air within a cylinder of the engine. The engine air prediction module predicts the engine air parameter at a second rate that is greater than the first rate. The engine actuator module controls an actuator of the engine based on at least one of the measured engine air parameter and the predicted engine air parameter.Type: GrantFiled: March 14, 2014Date of Patent: November 15, 2016Assignee: GM Global Technology Operations LLCInventors: Zhiping Steven Liu, Gregory P. Matthews, Anthony B. Will
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Patent number: 9458779Abstract: An engine control system of a vehicle includes a manifold temperature module, a runner temperature module. The manifold temperature module determines a first temperature of gas in an intake manifold of an engine. The runner temperature module determines a second temperature of gas in an intake runner associated with a cylinder based on the first temperature of the gas in the intake manifold. The engine control system further includes at least one of: a fuel control module that controls fueling of the cylinder based on the second temperature of the gas in the intake runner; and a spark control module that controls spark of the cylinder based on the second temperature of the gas in the intake runner.Type: GrantFiled: March 13, 2013Date of Patent: October 4, 2016Assignee: GM Global Technology Operations LLCInventors: Daniel G. Brennan, Gregory P. Matthews, Layne K. Wiggins
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Patent number: 9376973Abstract: A cylinder control system of a vehicle, includes a cylinder control module and a volumetric efficiency (VE) module. The cylinder control module determines a desired cylinder activation/deactivation sequence. The cylinder control module also activates and deactivates valves of cylinders of an engine based on the desired cylinder activation/deactivation sequence. The VE module determines a volumetric efficiency based on a cylinder activation/deactivation sequence of the last Q cylinders in the firing order. Q is an integer greater than one.Type: GrantFiled: March 13, 2013Date of Patent: June 28, 2016Assignee: GM Global Technology Operations LLCInventors: Daniel G. Brennan, Gregory P. Matthews, Layne K. Wiggins
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Patent number: 9249747Abstract: A system includes a cylinder event module that determines an air-per-cylinder value for a cylinder intake event or a cylinder non-intake event of a current cylinder based on a mass air flow signal and an engine speed signal. A status module generates a status signal indicating whether the current cylinder is activated. A deactivation module, based on the status signal, determines a current accumulated air mass in an intake manifold of an engine: for air received by the intake manifold since a last cylinder intake event of an activated cylinder and prior to one or more consecutive cylinder non-intake events of one or more deactivated cylinders; and based on a previous accumulated air mass in the intake manifold and the air-per-cylinder value. An activation module, based on the status signal, determines an air mass value for the current cylinder based on the air-per-cylinder value and the current accumulated air mass.Type: GrantFiled: March 13, 2013Date of Patent: February 2, 2016Assignee: GM Global Technology Operations LLCInventor: Gregory P. Matthews
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Patent number: 9222427Abstract: A system includes a parameter module that determines at least one of a position of a throttle and a load of an engine. A cylinder status module generates a status signal indicating an activation status of each cylinder of the engine. The cylinder status module determines whether one or more of the cylinders are activated. A first pressure prediction module, when all of the cylinders are activated, predicts first intake port pressures for the cylinders of the engine according to a first model and based on the at least one of the position of the throttle and the engine load. A second pressure prediction module, when one or more of the cylinders is deactivated, predicts second intake port pressures for the deactivated cylinders according to a second model and based on the status signal and the at least one of the position of the throttle and the engine load.Type: GrantFiled: March 13, 2013Date of Patent: December 29, 2015Assignee: GM Global Technology Operations LLCInventors: Gregory P. Matthews, Zhiping Steven Liu
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Patent number: 9151240Abstract: A system includes a mass determination module and a torque estimation module. The mass determination module determines a fuel mass injected into a cylinder of a homogeneous charge compression ignition (HCCI) engine for a combustion event in the cylinder. The torque estimation module estimates a torque output of the HCCI engine based on the fuel mass.Type: GrantFiled: April 11, 2011Date of Patent: October 6, 2015Assignee: GM Global Technology Operations LLCInventor: Gregory P. Matthews
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Publication number: 20150260112Abstract: A system according to the principles of the present disclosure includes an engine air sensor, an engine air prediction module, and an engine actuator module. The engine air sensor measures an engine air parameter at a first rate. The engine air parameter includes at least one of a mass flow rate of air flowing into an intake manifold of an engine, a pressure within the intake manifold, and a mass of air within a cylinder of the engine. The engine air prediction module predicts the engine air parameter at a second rate that is greater than the first rate. The engine actuator module controls an actuator of the engine based on at least one of the measured engine air parameter and the predicted engine air parameter.Type: ApplicationFiled: March 14, 2014Publication date: September 17, 2015Applicant: GM Global Technology Operations LLCInventors: ZHIPING STEVEN LIU, Gregory P. Matthews, Anthony B. Will
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Publication number: 20140190448Abstract: An engine control system of a vehicle includes a manifold temperature module, a runner temperature module. The manifold temperature module determines a first temperature of gas in an intake manifold of an engine. The runner temperature module determines a second temperature of gas in an intake runner associated with a cylinder based on the first temperature of the gas in the intake manifold. The engine control system further includes at least one of: a fuel control module that controls fueling of the cylinder based on the second temperature of the gas in the intake runner; and a spark control module that controls spark of the cylinder based on the second temperature of the gas in the intake runner.Type: ApplicationFiled: March 13, 2013Publication date: July 10, 2014Applicant: GM Global Technology Operations LLCInventors: Daniel G. Brennan, Gregory P. Matthews, Layne K. Wiggins
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Publication number: 20140069376Abstract: A system includes a parameter module that determines at least one of a position of a throttle and a load of an engine. A cylinder status module generates a status signal indicating an activation status of each cylinder of the engine. The cylinder status module determines whether one or more of the cylinders are activated. A first pressure prediction module, when all of the cylinders are activated, predicts first intake port pressures for the cylinders of the engine according to a first model and based on the at least one of the position of the throttle and the engine load. A second pressure prediction module, when one or more of the cylinders is deactivated, predicts second intake port pressures for the deactivated cylinders according to a second model and based on the status signal and the at least one of the position of the throttle and the engine load.Type: ApplicationFiled: March 13, 2013Publication date: March 13, 2014Applicant: GM Global Technology Operations LLCInventors: GREGORY P. MATTHEWS, Zhiping Steven Liu
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Publication number: 20140069377Abstract: A cylinder control system of a vehicle, includes a cylinder control module and a volumetric efficiency (VE) module. The cylinder control module determines a desired cylinder activation/deactivation sequence. The cylinder control module also activates and deactivates valves of cylinders of an engine based on the desired cylinder activation/deactivation sequence. The VE module determines a volumetric efficiency based on a cylinder activation/deactivation sequence of the last Q cylinders in the firing order. Q is an integer greater than one.Type: ApplicationFiled: March 13, 2013Publication date: March 13, 2014Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLCInventors: Daniel G. Brennan, Gregory P. Matthews, Layne K. Wiggins
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Publication number: 20140069375Abstract: A cylinder control system of a vehicle includes a cylinder control module and an air per cylinder (APC) prediction module. The cylinder control module determines a desired cylinder activation/deactivation sequence. The cylinder control module also activates and deactivates valves of cylinders of an engine based on the desired cylinder activation/deactivation sequence. The APC prediction module predicts an amount of air that will be trapped within a next activated cylinder in a firing order of the cylinders based on a cylinder activation/deactivation sequence of the last Q cylinders in the firing order. Q is an integer greater than one.Type: ApplicationFiled: March 13, 2013Publication date: March 13, 2014Applicant: GM Global Technology Operations LLCInventors: GREGORY P. MATTHEWS, Zhiping Steven Liu, Daniel G. Brennan