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).

  • Patent number: 10934960
    Abstract: 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: Grant
    Filed: November 2, 2018
    Date of Patent: March 2, 2021
    Assignee: GM GLOBAL TECHNOLOGY OPERATIONS LLC
    Inventors: Zhijian J. Wu, Zhiping S. Liu, Ping Ge, Martino A. Casetti, Gregory P. Matthews
  • Patent number: 10655550
    Abstract: 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: Grant
    Filed: July 13, 2015
    Date of Patent: May 19, 2020
    Assignee: GM GLOBAL TECHNOLOGY OPERATIONS LLC
    Inventors: Christopher E. Whitney, Layne K. Wiggins, Rafat F. Hattar, Gary Robert Cygan, Jr., Ning Jin, Gregory P. Matthews
  • Publication number: 20200141346
    Abstract: 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: Application
    Filed: November 2, 2018
    Publication date: May 7, 2020
    Inventors: Zhijian J. Wu, Zhiping S. Liu, Ping Ge, Martino A. Casetti, Gregory P. Matthews
  • Patent number: 10480435
    Abstract: 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: Grant
    Filed: March 21, 2018
    Date of Patent: November 19, 2019
    Assignee: GM Global Technology Operations LLC
    Inventors: Jun-mo Kang, Gregory P. Matthews, Martino A. Casetti
  • Publication number: 20190293011
    Abstract: 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: Application
    Filed: March 21, 2018
    Publication date: September 26, 2019
    Inventors: Jun-mo Kang, Gregory P. Matthews, Martino A. Casetti
  • Patent number: 10337441
    Abstract: 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: Grant
    Filed: June 9, 2015
    Date of Patent: July 2, 2019
    Assignee: GM GLOBAL TECHNOLOGY OPERATIONS LLC
    Inventor: Gregory P. Matthews
  • Publication number: 20170016407
    Abstract: 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: Application
    Filed: July 13, 2015
    Publication date: January 19, 2017
    Inventors: Christopher E. WHITNEY, Layne K. Wiggins, Rafat F. Hattar, Gary Robert Cygan, JR., Ning Jin, Gregory P. Matthews
  • Patent number: 9534550
    Abstract: 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: Grant
    Filed: March 13, 2013
    Date of Patent: January 3, 2017
    Assignee: GM Global Technology Operations LLC
    Inventors: Gregory P. Matthews, Zhiping Steven Liu, Daniel G. Brennan
  • Publication number: 20160363083
    Abstract: 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: Application
    Filed: June 9, 2015
    Publication date: December 15, 2016
    Inventor: Gregory P. MATTHEWS
  • Patent number: 9494092
    Abstract: 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: Grant
    Filed: March 14, 2014
    Date of Patent: November 15, 2016
    Assignee: GM Global Technology Operations LLC
    Inventors: Zhiping Steven Liu, Gregory P. Matthews, Anthony B. Will
  • Patent number: 9458779
    Abstract: 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: Grant
    Filed: March 13, 2013
    Date of Patent: October 4, 2016
    Assignee: GM Global Technology Operations LLC
    Inventors: Daniel G. Brennan, Gregory P. Matthews, Layne K. Wiggins
  • Patent number: 9376973
    Abstract: 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: Grant
    Filed: March 13, 2013
    Date of Patent: June 28, 2016
    Assignee: GM Global Technology Operations LLC
    Inventors: Daniel G. Brennan, Gregory P. Matthews, Layne K. Wiggins
  • Patent number: 9249747
    Abstract: 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: Grant
    Filed: March 13, 2013
    Date of Patent: February 2, 2016
    Assignee: GM Global Technology Operations LLC
    Inventor: Gregory P. Matthews
  • Patent number: 9222427
    Abstract: 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: Grant
    Filed: March 13, 2013
    Date of Patent: December 29, 2015
    Assignee: GM Global Technology Operations LLC
    Inventors: Gregory P. Matthews, Zhiping Steven Liu
  • Patent number: 9151240
    Abstract: 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: Grant
    Filed: April 11, 2011
    Date of Patent: October 6, 2015
    Assignee: GM Global Technology Operations LLC
    Inventor: Gregory P. Matthews
  • Publication number: 20150260112
    Abstract: 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: Application
    Filed: March 14, 2014
    Publication date: September 17, 2015
    Applicant: GM Global Technology Operations LLC
    Inventors: ZHIPING STEVEN LIU, Gregory P. Matthews, Anthony B. Will
  • Publication number: 20140190448
    Abstract: 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: Application
    Filed: March 13, 2013
    Publication date: July 10, 2014
    Applicant: GM Global Technology Operations LLC
    Inventors: Daniel G. Brennan, Gregory P. Matthews, Layne K. Wiggins
  • Publication number: 20140069376
    Abstract: 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: Application
    Filed: March 13, 2013
    Publication date: March 13, 2014
    Applicant: GM Global Technology Operations LLC
    Inventors: GREGORY P. MATTHEWS, Zhiping Steven Liu
  • Publication number: 20140069377
    Abstract: 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: Application
    Filed: March 13, 2013
    Publication date: March 13, 2014
    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
    Inventors: Daniel G. Brennan, Gregory P. Matthews, Layne K. Wiggins
  • Publication number: 20140069375
    Abstract: 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: Application
    Filed: March 13, 2013
    Publication date: March 13, 2014
    Applicant: GM Global Technology Operations LLC
    Inventors: GREGORY P. MATTHEWS, Zhiping Steven Liu, Daniel G. Brennan