Patents by Inventor Julian C. Tan
Julian C. Tan 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: 9334774Abstract: An engine control system includes an injection determination module and an injection regulation module. The injection determination module determines a desired rate of hydrocarbon (HC) injection into exhaust gas produced by an engine for regeneration of a particulate matter (PM) filter. The injection regulation module increases a rate of HC injection from a first rate to the desired rate during a predetermined period before regeneration of the PM filter, wherein the predetermined period is based on a difference between a predetermined temperature and a temperature at an outlet of an oxidation catalyst (OC).Type: GrantFiled: May 4, 2010Date of Patent: May 10, 2016Assignee: GM Global Technology Operations LLCInventors: Julian C. Tan, John Zeilstra, Christoph Thoele, Gustavo Tepedino
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Patent number: 9003792Abstract: In an exemplary embodiment, an internal combustion engine includes an oxidation catalyst configured to receive an exhaust gas flow from the internal combustion engine, a urea injector positioned downstream of the oxidation catalyst to inject a urea flow into the exhaust gas flow and a mixer positioned downstream of the urea injector to mix the exhaust gas flow and the urea flow to form a mixed exhaust gas and urea flow. The engine also includes a particulate filter and catalytic reduction assembly positioned downstream of the mixer to receive the mixed exhaust and urea flow from the mixer to form a treated exhaust gas flow and an exhaust gas recirculation system coupled to the particulate filter to receive a portion of the treated exhaust gas flow and recirculate the portion of the exhaust gas flow to be mixed with a fresh air flow for the internal combustion engine.Type: GrantFiled: April 5, 2012Date of Patent: April 14, 2015Assignee: GM Global Technology Operations LLCInventors: Manuel Angel Gonzalez Delgado, Julian C. Tan, Joshua Clifford Bedford, Yong Miao, Naser I. Hineiti, Steven M. Yocum
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Patent number: 8864875Abstract: An exhaust gas treatment system for an internal combustion engine is provided comprising an exhaust gas conduit, a particulate filter (“PF”) device, a hydrocarbon source and an electronic control module including operative logic which when implemented. The PF has a filter structure for removal of particulates in the exhaust gas and is selectively regenerated based on an amount of particulates trapped within the filter structure of the PF device. The control module is in communication with the internal combustion engine and the hydrocarbon source, and receives a regeneration signal indicating the amount of particulates trapped within the filter structure of the PF device. The electronic control module includes control logic for monitoring the internal combustion engine prior to a regeneration event. The electronic control module includes control logic for determining a plurality operating parameters of the internal combustion engine based on the monitoring.Type: GrantFiled: November 13, 2012Date of Patent: October 21, 2014Assignee: GM Global Technology Operations LLCInventors: Eugene V. Gonze, Michael J. Paratore, Jr., Julian C. Tan
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Patent number: 8783019Abstract: An exhaust treatment system is disclosed that can diagnose the performance of an exhaust treatment oxidation catalyst in converting NO to NO2. The exhaust treatment system is fluidly coupled to an internal combustion engine, and includes an oxidation catalyst disposed in an engine exhaust stream; a reductant source for injecting a reductant into the exhaust stream downstream of the oxidation catalyst; an SCR catalyst disposed in the exhaust stream downstream of the reductant source; and a gas sensor, disposed in the exhaust stream downstream of the oxidation catalyst and upstream of the reductant source, comprising a plurality of sensing or pumping cells that measures NO concentration in the exhaust gas and NO2 concentration in the exhaust gas.Type: GrantFiled: September 5, 2012Date of Patent: July 22, 2014Assignee: GM Global Technology Operations LLCInventors: Joshua Clifford Bedford, Julian C. Tan, Janean E Kowalkowski
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Publication number: 20140130665Abstract: An exhaust gas treatment system for an internal combustion engine is provided comprising an exhaust gas conduit, a particulate filter (“PF”) device, a hydrocarbon source and an electronic control module including operative logic which when implemented. The PF has a filter structure for removal of particulates in the exhaust gas and is selectively regenerated based on an amount of particulates trapped within the filter structure of the PF device. The control module is in communication with the internal combustion engine and the hydrocarbon source, and receives a regeneration signal indicating the amount of particulates trapped within the filter structure of the PF device. The electronic control module includes control logic for monitoring the internal combustion engine prior to a regeneration event. The electronic control module includes control logic for determining a plurality operating parameters of the internal combustion engine based on the monitoring.Type: ApplicationFiled: November 13, 2012Publication date: May 15, 2014Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLCInventors: Eugene V. Gonze, Michael J. Paratore, JR., Julian C. Tan
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Publication number: 20140060007Abstract: An exhaust treatment system is disclosed that can diagnose the performance of an exhaust treatment oxidation catalyst in converting NO to NO2. The exhaust treatment system is fluidly coupled to an internal combustion engine, and includes an oxidation catalyst disposed in an engine exhaust stream; a reductant source for injecting a reductant into the exhaust stream downstream of the oxidation catalyst; an SCR catalyst disposed in the exhaust stream downstream of the reductant source; and a gas sensor, disposed in the exhaust stream downstream of the oxidation catalyst and upstream of the reductant source, comprising a plurality of sensing or pumping cells that measures NO concentration in the exhaust gas and NO2 concentration in the exhaust gas.Type: ApplicationFiled: September 5, 2012Publication date: March 6, 2014Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLCInventors: Joshua Clifford Bedford, Julian C. Tan, Janean E. Kowalkowski
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Publication number: 20130263593Abstract: In an exemplary embodiment, an internal combustion engine includes an oxidation catalyst configured to receive an exhaust gas flow from the internal combustion engine, a urea injector positioned downstream of the oxidation catalyst to inject a urea flow into the exhaust gas flow and a mixer positioned downstream of the urea injector to mix the exhaust gas flow and the urea flow to form a mixed exhaust gas and urea flow. The engine also includes a particulate filter and catalytic reduction assembly positioned downstream of the mixer to receive the mixed exhaust and urea flow from the mixer to form a treated exhaust gas flow and an exhaust gas recirculation system coupled to the particulate filter to receive a portion of the treated exhaust gas flow and recirculate the portion of the exhaust gas flow to be mixed with a fresh air flow for the internal combustion engine.Type: ApplicationFiled: April 5, 2012Publication date: October 10, 2013Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLCInventors: MANUEL ANGEL GONZALEZ DELGADO, JULIAN C. TAN, JOSHUA CLIFFORD BEDFORD, YONG MIAO, NASER I. HINEITI, STEVEN M. YOCUM
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Publication number: 20130180231Abstract: In one exemplary embodiment of an exhaust aftertreatment system, the system includes an oxidation catalyst configured to receive an exhaust gas flow from an internal combustion engine and a particulate filter positioned downstream of the oxidation catalyst, the particulate filter comprising a substrate. The system also includes a nitrogen oxide adsorbing catalyst applied to a downstream portion of the substrate and a selective catalytic reduction device positioned downstream of the nitrogen oxide adsorbing catalyst, wherein the selective catalytic reduction device is configured to remove nitrogen oxides from the exhaust gas flow.Type: ApplicationFiled: January 13, 2012Publication date: July 18, 2013Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLCInventors: Yong Miao, Julian C. Tan
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Patent number: 8424293Abstract: A method of regenerating a diesel particulate filter (DPF) may include operating a vehicle including a diesel engine at an idle condition and applying a load to the diesel engine during the idle condition to increase an exhaust temperature of the diesel engine relative to a nominal idle condition. The increased exhaust temperature may regenerate a diesel particulate filter of the diesel engine during the idle condition.Type: GrantFiled: March 5, 2008Date of Patent: April 23, 2013Inventors: Chad E. Marlett, Julian C. Tan, David A. Richeson
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Patent number: 8424290Abstract: A method and control system for controlling an engine during diesel particulate filter regeneration includes a diesel particulate filter (DPF) regeneration request module that generates a DPF regeneration request signal and an idle condition module that generates an idle condition signal when the engine is at an idle condition. A DPF regeneration control module initiates a timer in response to the DPF regeneration request signal and the idle condition signal. The DPF regeneration control module controls the engine oxygen level to a second level less than a first level corresponding to a non-idle speed level, and after a time period, controls the engine to generate oxygen at a third level greater than the second level.Type: GrantFiled: February 26, 2010Date of Patent: April 23, 2013Inventors: Julian C. Tan, John Zeilstra, Christoph Thoele, Gustavo Tepedino
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Patent number: 8261535Abstract: A post injection control system for regulating diesel particulate regeneration of a diesel particulate filter (DPF) with a diesel engine includes a mass airflow sensor that generates a mass airflow signal. A temperature sensor senses the temperature of exhaust and generates an exhaust temperature signal. And a control module commands post injection at a post injection value determined from the mass airflow signal and at a post injection rate determined from the exhaust temperature signal.Type: GrantFiled: June 30, 2005Date of Patent: September 11, 2012Inventors: Chad E. Marlett, Julian C. Tan
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Patent number: 8215294Abstract: A method and control system for controlling an engine during diesel particulate filter regeneration includes a diesel particulate filter (DPF) regeneration request module that generates a DPF regeneration request signal. The control system also includes a DPF regeneration control module that controls the oxygen level in the exhaust based on an oxygen level signal corresponding to an oxygen level in the exhaust and a DPF inlet temperature signal corresponding to the DPF inlet temperature.Type: GrantFiled: January 6, 2010Date of Patent: July 10, 2012Inventors: Julian C. Tan, John Zeilstra, Christoph Thoele, Gustavo Tepedino
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Publication number: 20110271657Abstract: An engine control system includes an injection determination module and an injection distribution module. The injection determination module determines a desired amount of hydrocarbons (HC) to inject into exhaust gas produced by an engine for regeneration of a particulate matter (PM) filter. The injection distribution module controls a ratio of auxiliary injection to post-combustion injection based on engine load, engine speed, and the desired amount of HC injection, wherein auxiliary injection includes injecting HC into the exhaust gas, and wherein post-combustion injection includes injecting HC into cylinders of the engine during a period after combustion.Type: ApplicationFiled: May 4, 2010Publication date: November 10, 2011Applicant: GM GLOBAL TECHNOLOGY OPERATIONS, INC.Inventors: Julian C. Tan, John Zeilstra, Christoph Thoele, Gustavo Tepedino
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Publication number: 20110271656Abstract: An engine control system includes an injection determination module and an injection regulation module. The injection determination module determines a desired rate of hydrocarbon (HC) injection into exhaust gas produced by an engine for regeneration of a particulate matter (PM) filter. The injection regulation module increases a rate of HC injection from a first rate to the desired rate during a predetermined period before regeneration of the PM filter, wherein the predetermined period is based on a difference between a predetermined temperature and a temperature at an outlet of an oxidation catalyst (OC).Type: ApplicationFiled: May 4, 2010Publication date: November 10, 2011Applicant: GM GLOBAL TECHNOLOGY OPERATIONS, INC.Inventors: Julian C. Tan, John Zeilstra, Christoph Thoele, Gustavo Tepedino
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Patent number: 8042326Abstract: An apparatus and a method for enhancing diesel engine performance is provided. At low engine load and cold ambient temperatures, an intake air heater increases the engine load via an engine alternator, which in turn, enables the engine to burn more fuel by the process of combustion. The combusted fuel elevates exhaust gas temperatures, which thereby accommodates cold start, controls white smoke, and aids DPF regeneration.Type: GrantFiled: January 24, 2008Date of Patent: October 25, 2011Assignee: GM Global Technology Operations LLCInventors: Tracy M. Farell, Julian C. Tan, Sean Whitaker
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Publication number: 20110209463Abstract: A method and control system for controlling an engine during diesel particulate filter regeneration includes a diesel particulate filter (DPF) regeneration request module that generates a DPF regeneration request signal and an idle condition module that generates an idle condition signal when the engine is at an idle condition. A DPF regeneration control module initiates a timer in response to the DPF regeneration request signal and the idle condition signal. The DPF regeneration control module controls the engine oxygen level to a second level less than a first level corresponding to a non-idle speed level, and after a time period, controls the engine to generate oxygen at a third level greater than the second level.Type: ApplicationFiled: February 26, 2010Publication date: September 1, 2011Applicant: GM GLOBAL TECHNOLOGY OPERATIONS, INC.Inventors: Julian C. Tan, John Zeilstra, Christoph Thoele, Gustavo Tepedino
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Patent number: D1016783Type: GrantFiled: May 10, 2023Date of Patent: March 5, 2024Assignee: Apple Inc.Inventors: Jody Akana, Molly Anderson, Bartley K. Andre, Shota Aoyagi, Anthony Michael Ashcroft, Marine C. Bataille, Jeremy Bataillou, Abidur Rahman Chowdhury, Clara Geneviève Marine Courtaigne, Markus Diebel, Jonathan Gomez Garcia, M. Evans Hankey, Richard P. Howarth, Jonathan P. Ive, Julian Jaede, Duncan Robert Kerr, Peter Russell-Clarke, Benjamin Andrew Shaffer, Sung-Ho Tan, Clement Tissandier, Eugene Antony Whang
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Patent number: D1018548Type: GrantFiled: November 28, 2022Date of Patent: March 19, 2024Assignee: Apple Inc.Inventors: Jody Akana, Molly Anderson, Bartley K. Andre, Shota Aoyagi, Anthony Michael Ashcroft, Marine C. Bataille, Jeremy Bataillou, Adam T. Clavelle, Erik Geddes Pieter De Jong, Markus Diebel, M. Evans Hankey, Julian Hoenig, Richard P. Howarth, Jonathan P. Ive, Julian Jaede, Duncan Robert Kerr, Martin Melcher, Peter Russell-Clarke, Benjamin Andrew Shaffer, Mikael Silvanto, Sung-Ho Tan, Clement Tissandier, Eugene Antony Whang, Rico Zörkendörfer
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Patent number: D1018549Type: GrantFiled: July 13, 2023Date of Patent: March 19, 2024Assignee: Apple Inc.Inventors: Jody Akana, Molly Anderson, Bartley K. Andre, Shota Aoyagi, Anthony Michael Ashcroft, Marine C. Bataille, Jeremy Bataillou, Markus Diebel, M. Evans Hankey, Julian Hoenig, Richard P. Howarth, Jonathan P. Ive, Julian Jaede, Duncan Robert Kerr, Peter Russell-Clarke, Benjamin Andrew Shaffer, Mikael Silvanto, Sung-Ho Tan, Clement Tissandier, Eugene Antony Whang, Rico Zörkendörfer
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Patent number: D1023009Type: GrantFiled: May 10, 2022Date of Patent: April 16, 2024Assignee: Apple Inc.Inventors: Jody Akana, Molly Anderson, Bartley K. Andre, Shota Aoyagi, Anthony Michael Ashcroft, John J. Baker, Marine C. Bataille, Jeremy Bataillou, Abidur Rahman Chowdhury, Clara Geneviève Marine Courtaigne, Markus Diebel, Richard Hung Minh Dinh, Christopher E. Glazowski, Jonathan Gomez Garcia, Jean-Pierre S. Guillou, M. Evans Hankey, Matthew David Hill, Julian Hoenig, Richard P. Howarth, Jonathan P. Ive, Julian Jaede, Duncan Robert Kerr, Peter Russell-Clarke, Benjamin Andrew Shaffer, Sung-Ho Tan, Clement Tissandier, Eugene Antony Whang, Rico Zörkendörfer