Patents by Inventor Stephen J. Charlton
Stephen J. Charlton 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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Publication number: 20200116068Abstract: A diagnostic engine calibration module is provided that is structured to diagnose a vehicle system by causing the vehicle system to operate outside of one or more calibration parameters. The diagnostic engine calibration module includes a diesel particulate filter (DPF) pressure module structured to determine a pressure differential across a DPF of an engine of the vehicle system and compare the determined pressure differential against a plurality of predetermined fault thresholds to diagnose the DPF, the plurality of predetermined fault thresholds including a predetermined minimum pressure threshold and a predetermined maximum pressure threshold.Type: ApplicationFiled: December 16, 2019Publication date: April 16, 2020Applicant: Cummins IP, Inc.Inventors: Tony J. Hall, Stephen J. Charlton, Michael J. McGuire
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Patent number: 10508582Abstract: An engine diagnostic tool includes a diagnostic engine calibration module structured to include a plurality of diagnostic processes for operating an internal combustion engine system of an immobilized vehicle. One or more of the plurality of diagnostic processes are structured to be an intrusive diagnostic process for the internal combustion engine system, wherein the intrusive diagnostic process causes the internal combustion engine system to operate outside of one or more calibration parameters. The diagnostic engine module is further structured to control the order and timing of each diagnostic process in the plurality of diagnostic processes.Type: GrantFiled: June 22, 2017Date of Patent: December 17, 2019Assignee: Cummins IP, Inc.Inventors: Tony J. Hall, Stephen J. Charlton, Michael J. McGuire
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Publication number: 20170292432Abstract: An engine diagnostic tool includes a diagnostic engine calibration module structured to include a plurality of diagnostic processes for operating an internal combustion engine system of an immobilized vehicle. One or more of the plurality of diagnostic processes are structured to be an intrusive diagnostic process for the internal combustion engine system, wherein the intrusive diagnostic process causes the internal combustion engine system to operate outside of one or more calibration parameters. The diagnostic engine module is further structured to control the order and timing of each diagnostic process in the plurality of diagnostic processes.Type: ApplicationFiled: June 22, 2017Publication date: October 12, 2017Applicant: Cummins IP, Inc.Inventors: Tony J. Hall, Stephen J. Charlton, Michael J. McGuire
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Patent number: 9708960Abstract: An engine diagnostic tool includes a diagnostic engine calibration module structured to include a plurality of diagnostic processes for operating an internal combustion engine system of an immobilized vehicle. One or more of the plurality of diagnostic processes are structured to be an intrusive diagnostic process for the internal combustion engine system, wherein the intrusive diagnostic process causes the internal combustion engine system to operate outside of one or more calibration parameters. The diagnostic engine module is further structured to control the order and timing of each diagnostic process in the plurality of diagnostic processes.Type: GrantFiled: May 6, 2014Date of Patent: July 18, 2017Assignee: Cummins IP, Inc.Inventors: Tony J. Hall, Stephen J. Charlton, Michael J. McGuire
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Publication number: 20140331752Abstract: An engine diagnostic tool includes a diagnostic engine calibration module structured to include a plurality of diagnostic processes for operating an internal combustion engine system of an immobilized vehicle. One or more of the plurality of diagnostic processes are structured to be an intrusive diagnostic process for the internal combustion engine system, wherein the intrusive diagnostic process causes the internal combustion engine system to operate outside of one or more calibration parameters. The diagnostic engine module is further structured to control the order and timing of each diagnostic process in the plurality of diagnostic processes.Type: ApplicationFiled: May 6, 2014Publication date: November 13, 2014Applicant: Cummins IP, Inc.Inventors: Tony J. Hall, Stephen J. Charlton, Michael J. McGuire
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Patent number: 8863504Abstract: A method includes determining a first NOx conversion efficiency (?) value and determining that a diesel exhaust fluid (DEF) level has increased a threshold amount. Further, the method includes determining a second NOx conversion ? value and comparing the first NOx conversion ? value and the second NOx conversion ? value, determining a NOx conversion ? change in response to comparing, and determining a DEF quality indicator in response to the NOx conversion ? change.Type: GrantFiled: September 30, 2010Date of Patent: October 21, 2014Assignee: Cummins Inc.Inventors: Mark Bays, Thomas A. Grana, Daniel D. Wilheim, Stephen J. Charlton, John Carson Wall
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Publication number: 20110209461Abstract: A method includes determining a first NOx conversion efficiency (?) value and determining that a diesel exhaust fluid (DEF) level has increased a threshold amount. Further, the method includes determining a second NOx conversion ? value and comparing the first NOx conversion ? value and the second NOx conversion ? value, determining a NOx conversion ? change in response to comparing, and determining a DEF quality indicator in response to the NOx conversion ? change.Type: ApplicationFiled: September 30, 2010Publication date: September 1, 2011Inventors: Mark Bays, Thomas A. Grana, Daniel D. Wilheim, Stephen J. Charlton, John Carson Wall
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Patent number: 6837227Abstract: A system is disclosed for estimating the mass flow of recirculated exhaust gas (EGR) from an exhaust manifold to an intake manifold of an internal combustion engine via an EGR conduit disposed therebetween and a fraction of EGR attributable to a mass of charge flow entering the intake manifold. An engine controller is responsive to current values of various combinations of the engine exhaust temperature (ETE), intake manifold pressure (IMP), differential pressure (?P) across an EGR valve, and EGR valve position (EGRP) to determine an estimate of EGR mass flow. The controller is further operable to estimate EGR fraction as a function of the estimated EGR mass flow value, mass flow of charge entering the intake manifold, and engine speed.Type: GrantFiled: January 31, 2001Date of Patent: January 4, 2005Assignee: Cummins, Inc.Inventors: Salim A. Jaliwala, Paul R. Miller, Larry J. Brackney, Thomas A. Dollmeyer, Chuan He, George Brunemann, John F. Wright, Stephen J. Charlton
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Publication number: 20020100463Abstract: A system is disclosed for estimating the mass flow of recirculated exhaust gas (EGR) from an exhaust manifold to an intake manifold of an internal combustion engine via an EGR conduit disposed therebetween and a fraction of EGR attributable to a mass of charge flow entering the intake manifold. An engine controller is responsive to current values of various combinations of the engine exhaust temperature (ETE), intake manifold pressure (IMP), differential pressure (&Dgr;P) across an EGR valve, and EGR valve position (EGRP) to determine an estimate of EGR mass flow. The controller is further operable to estimate EGR fraction as a function of the estimated EGR mass flow value, mass flow of charge entering the intake manifold, and engine speed.Type: ApplicationFiled: January 31, 2001Publication date: August 1, 2002Inventors: Salim A. Jaliwala, Paul R. Miller, Larry J. Brackney, Thomas A. Dollmeyer, Chuan He, George Brunemann, John F. Wright, Stephen J. Charlton
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Patent number: 6216461Abstract: An exhaust gas recirculation and control system is provided for an internal combustion engine, wherein a portion of engine exhaust gas flow is recirculated through an EGR duct to engine intake air. The recirculated exhaust gas is pumped through the EGR duct by an EGR compressor driven by a dedicated EGR drive that is independently controllable. Because the EGR drive is independently powered and controlled, the EGR flow rate capacity of the system is not dictated by, or limited, by factors such as engine exhaust flow rate. A controller modulates power delivery to the drive means in response to at least one operating condition parameter in order to achieve a desired EGR flow rate. In order to further optimize efficiency, the EGR compressor is preferably a discrete displacement pump which is controllably drivable in a pulse-capture mode, wherein each intake of the EGR compressor is timed synchronously with exhaust pulses in the exhaust manifold.Type: GrantFiled: September 15, 2000Date of Patent: April 17, 2001Assignee: Cummins Engine Company, Inc.Inventors: Josh S. Shao, Long Kung Hwang, Paul R. Miller, Stephen J. Charlton
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Patent number: 6216460Abstract: An exhaust gas recirculation and control system is provided for an internal combustion engine, wherein a portion of engine exhaust gas flow is recirculated through an EGR duct to engine intake air. The recirculated exhaust gas is pumped through the EGR duct by an EGR compressor driven by a dedicated EGR drive that is independently controllable. Because the EGR drive is independently powered and controlled, the EGR flow rate capacity of the system is not dictated by, or limited, by factors such as engine exhaust flow rate. A controller modulates power delivery to the drive means in response to at least one operating condition parameter in order to achieve a desired EGR flow rate. In order to further optimize efficiency, the EGR compressor is preferably a discrete displacement pump which is controllably drivable in a pulse-capture mode, wherein each intake of the EGR compressor is timed synchronously with exhaust pulses in the exhaust manifold.Type: GrantFiled: September 15, 2000Date of Patent: April 17, 2001Assignee: Cummins Engine Company, Inc.Inventors: Josh S. Shao, Long-Kung Hwang, Paul R. Miller, Stephen J. Charlton
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Patent number: 6164071Abstract: An exhaust gas recirculation and control system is provided for an internal combustion engine, wherein a portion of engine exhaust gas flow is recirculated through an EGR duct to engine intake air. The recirculated exhaust gas is pumped through the EGR duct by an EGR compressor driven by a dedicated EGR drive that is independently controllable. Because the EGR drive is independently powered and controlled, the EGR flow rate capacity of the system is not dictated by, or limited, by factors such as engine exhaust flow rate. A controller modulates power delivery to the drive means in response to at least one operating condition parameter in order to achieve a desired EGR flow rate. In order to further optimize efficiency, the EGR compressor is preferably a discrete displacement pump which is controllably drivable in a pulse-capture mode, wherein each intake of the EGR compressor is timed synchronously with exhaust pulses in the exhaust manifold.Type: GrantFiled: September 8, 1997Date of Patent: December 26, 2000Assignee: Cummins Engine Company, Inc.Inventors: Josh S. Shao, Long Kung Hwang, Paul R. Miller, Stephen J. Charlton