Patents by Inventor Danan Dou
Danan Dou 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: 11939929Abstract: An engine system includes an internal combustion engine, an electrical power system configured to provide electrical power in the engine system, and an electrified air system powered by the electrical power system to selectively increase a flow of intake air and exhaust gas to the engine. The electrified air system further includes an EGR pump operable to recirculate a portion of exhaust gas output from the engine and an electric turbocharger including a turbine, a compressor driven by the turbine via a shaft coupled therebetween, and an electrical machine coupled to the shaft. The electrical machine is configured to operate in a motoring mode to drive the shaft and cause the compressor to output boosted intake air to the engine and operate in a generating mode to transform rotational power from the shaft into electrical power that is provided back into the electrical power system.Type: GrantFiled: August 19, 2021Date of Patent: March 26, 2024Assignee: DEERE &COMPANYInventors: Danan Dou, Eric J. Haaland
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Patent number: 11920507Abstract: An exhaust gas treatment system for an internal combustion engine includes an exhaust gas pathway that receives exhaust gas from the engine, a temperature sensor configured to generate a temperature signal associated with a temperature of the exhaust gas at a position along the exhaust gas pathway, and a reductant source. The system also includes first and second injectors in fluid communication with the reductant source. The first and second injectors are configured to inject reductant into the exhaust gas pathway at first and second rates. The system also includes a first treatment element positioned downstream of the first injector and within the exhaust gas pathway, and a controller in communication with the temperature sensor. The controller is configured to receive the temperature signal from the temperature sensor and adjust at least one of the first rate or the second rate based at least in part on the temperature signal.Type: GrantFiled: January 15, 2021Date of Patent: March 5, 2024Assignee: Deere & CompanyInventors: Danan Dou, Shyan-Cherng Huang, Taner Tuken, Thomas M. Harris
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Publication number: 20230407807Abstract: A power system for a work vehicle includes an intake arrangement for intake of charge air; a fuel arrangement including a fuel tank storing a low carbon fuel blend; an engine configured to receive, ignite, and combust a mixture of the charge air and the low carbon fuel blend; an exhaust arrangement positioned downstream to receive exhaust from the engine during combustion of the low carbon fuel blend; at least one exhaust sensor positioned at or proximate to the exhaust arrangement; and a controller. The controller is configured to receive an initial indication of a composition of the low carbon fuel blend; implement operating parameters with feedforward adjustments based on the initial indication of the composition of the low carbon fuel blend; receive feedback from the at least one exhaust sensor regarding operational conditions; and adjust the operating parameters based on the feedback.Type: ApplicationFiled: May 26, 2023Publication date: December 21, 2023Inventors: Danan Dou, Craig W. Lohmann, Taner Tuken, Daniel A. Nehmer, Barbara E. Goodrich
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Publication number: 20230399988Abstract: A power system includes an intake arrangement configured to intake charge air; a fuel arrangement configured to store a blend of methane (CH4) and hydrogen (H2) fuel; an engine configured to receive, ignite, and combust a mixture of the charge air and the blend of methane (CH4) and hydrogen (H2) fuel; and a controller coupled to selectively command such that, in a first mode, the controller commands the one or more of the intake arrangement, the fuel arrangement, and the engine such that the charge air and the blend of methane (CH4) and hydrogen (H2) fuel are introduced at a stoichiometric equivalence ratio; and in a second mode, the controller commands the one or more of the intake arrangement, the fuel arrangement, and the engine such that the charge and the blend of methane (CH4) and hydrogen (H2) fuel are introduced at a lean equivalence ratio.Type: ApplicationFiled: May 26, 2023Publication date: December 14, 2023Inventors: Danan Dou, Scott R. Miles
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Patent number: 11815000Abstract: A method of treating exhaust gas from an internal combustion engine as the exhaust gas passes through an exhaust gas pathway includes injecting reductant into the exhaust gas pathway with a reductant injector, filtering particulate matter from the exhaust gas with a first treatment element located downstream of the reductant injector, oxidizing soot on the first treatment element with ozone, and converting nitrogen oxides (NOx) from the exhaust gas with a second treatment element located downstream of the reductant injector.Type: GrantFiled: May 27, 2022Date of Patent: November 14, 2023Assignee: Deere & CompanyInventors: Danan Dou, Eric J. Hruby, Bryan T. Geisick
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Patent number: 11643955Abstract: One or more techniques and/or systems are disclosed for providing localized heating within an engine exhaust aftertreatment system. The localized heating includes DEF injector nozzle heating with a DEF dispensing system having a DEF fluid supply and a DEF injector fluidly coupled to the DEF fluid supply. The DEF injector includes a DEF injector nozzle. The DEF dispensing system further includes a DEF heater positioned in proximity to the DEF injector nozzle. The DEF heater is configured to locally heat an area surrounding the DEF injector nozzle.Type: GrantFiled: December 14, 2021Date of Patent: May 9, 2023Assignee: Deere & CompanyInventors: Danan Dou, Derek A. Weiss
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Patent number: 11635039Abstract: A power system for a work vehicle includes an alcohol tank configured to store alcohol; a catalytic converter fluidly coupled to receive alcohol from the alcohol tank and configured to convert the alcohol into ether; and an engine including one or more piston-cylinder sets configured to selectively receive the alcohol stored in the alcohol tank and the ether converted by the catalytic converter and to combust the alcohol and the ether with air to produce mechanical power and exhaust gas.Type: GrantFiled: April 15, 2022Date of Patent: April 25, 2023Assignee: DEERE & COMPANYInventors: Danan Dou, Craig W. Lohmann
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Exhaust gas treatment system and method with reductant injection and close-coupled treatment element
Patent number: 11624309Abstract: An exhaust gas treatment system for an internal combustion engine includes an exhaust gas pathway configured to receive exhaust gas from the internal combustion engine, a first treatment element positioned within the exhaust gas pathway, the first treatment element including a selective catalytic reduction (SCR) element, a first injector configured to selectively introduce ammonia gas into the exhaust gas pathway upstream of the first treatment element, a second injector configured to introduce diesel exhaust fluid into the exhaust gas pathway downstream of the first treatment element, and a second treatment element positioned within the exhaust gas pathway downstream of the second injector, the second treatment element including a SCR element.Type: GrantFiled: June 24, 2021Date of Patent: April 11, 2023Assignee: Deere & CompanyInventors: Danan Dou, Eric J. Hruby, Shyan-Cherng Huang -
Patent number: 11619156Abstract: One or more techniques and/or systems are disclosed for controlling exhaust heating to reduce engine out NOx emission. A heater is used for exhaust temperature control of an exhaust system and is activated at a non-active selective catalytic reduction (SCR) system temperature. One or more exhaust air flow bypasses are controlled during operation of the heater and heating of an exhaust air flow is maintained by the heater prior to activation of the SCR system.Type: GrantFiled: December 14, 2021Date of Patent: April 4, 2023Assignee: Deere & CompanyInventors: Danan Dou, Eric J. Hruby
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Publication number: 20230054060Abstract: An engine system includes an internal combustion engine, an electrical power system configured to provide electrical power in the engine system, and an electrified air system powered by the electrical power system to selectively increase a flow of intake air and exhaust gas to the engine. The electrified air system further includes an EGR pump operable to recirculate a portion of exhaust gas output from the engine and an electric turbocharger including a turbine, a compressor driven by the turbine via a shaft coupled therebetween, and an electrical machine coupled to the shaft. The electrical machine is configured to operate in a motoring mode to drive the shaft and cause the compressor to output boosted intake air to the engine and operate in a generating mode to transform rotational power from the shaft into electrical power that is provided back into the electrical power system.Type: ApplicationFiled: August 19, 2021Publication date: February 23, 2023Inventors: Danan Dou, Eric J. Haaland
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Patent number: 11572824Abstract: An engine system includes an internal combustion engine, an energy storage device configured to provide electrical power, and an electrified air-boost system powered by the electrical power from the energy storage device to boost intake air to the engine, with the electrified air-boost system further including an electrical machine and a pressure device driven by the electrical machine to output boosted intake air to the engine. The engine system also includes a controller operably connected with the electrified air-boost system, with the controller configured to monitor engine speed and engine load during operation of the engine, identify an impending engine stall condition based on the monitored engine speed and engine load, and when the impending engine stall condition is identified, temporarily operate the electrified air-boost system to boost the intake air to the engine, thereby boosting a torque output of the engine.Type: GrantFiled: May 13, 2021Date of Patent: February 7, 2023Assignee: DEERE & COMPANYInventors: Scott R. Miles, Pratir R. Punjani, Danan Dou
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Patent number: 11572673Abstract: A power system includes an engine; an exhaust gas recirculation (EGR) system supplying a first portion of the engine exhaust gas from the exhaust manifold to the intake manifold; a turbine generator in communication with the exhaust manifold and configured to be driven by a second portion of the engine exhaust gas from the exhaust manifold to generate electrical power; a power network including at least one battery to store the electrical power generated by the turbine generator; and an electric compressor in fluid communication with the intake manifold and configured to be powered by the electrical power from the at least one battery of the power network and to compress at least a portion of the intake air for the engine.Type: GrantFiled: June 25, 2021Date of Patent: February 7, 2023Assignee: DEERE & COMPANYInventors: Danan Dou, Eric J. Haaland
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Publication number: 20220412053Abstract: A power system includes an engine; an exhaust gas recirculation (EGR) system supplying a first portion of the engine exhaust gas from the exhaust manifold to the intake manifold; a turbine generator in communication with the exhaust manifold and configured to be driven by a second portion of the engine exhaust gas from the exhaust manifold to generate electrical power; a power network including at least one battery to store the electrical power generated by the turbine generator; and an electric compressor in fluid communication with the intake manifold and configured to be powered by the electrical power from the at least one battery of the power network and to compress at least a portion of the intake air for the engine.Type: ApplicationFiled: June 25, 2021Publication date: December 29, 2022Inventors: Danan Dou, Eric J. Haaland
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Patent number: 11536213Abstract: An engine system includes an engine with an intake manifold and an exhaust manifold, a turbocharger including a turbine in communication with the exhaust manifold and a compressor in communication with the intake manifold, and a regulator configured to control a flow of exhaust gas through the turbine. A controller of the engine system is operably connected with the regulator and is configured to monitor an engine load and an exhaust gas temperature during operation of the engine, identify a proscribed engine NOx emissions level based on the engine load and the exhaust gas temperature and, when the proscribed engine NOx emissions level is identified, modify the flow of exhaust gas through the turbine to reduce the energy extracted from the exhaust gas by the turbine and reduce a drive power provided to the compressor, thereby reducing a flow of intake air provided to the intake manifold by the compressor.Type: GrantFiled: May 19, 2021Date of Patent: December 27, 2022Assignee: DEERE & COMPANYInventors: Scott R. Miles, Danan Dou
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Publication number: 20220372927Abstract: An engine system includes an engine with an intake manifold and an exhaust manifold, a turbocharger including a turbine in communication with the exhaust manifold and a compressor in communication with the intake manifold, and a regulator configured to control a flow of exhaust gas through the turbine. A controller of the engine system is operably connected with the regulator and is configured to monitor an engine load and an exhaust gas temperature during operation of the engine, identify a proscribed engine NOx emissions level based on the engine load and the exhaust gas temperature and, when the proscribed engine NOx emissions level is identified, modify the flow of exhaust gas through the turbine to reduce the energy extracted from the exhaust gas by the turbine and reduce a drive power provided to the compressor, thereby reducing a flow of intake air provided to the intake manifold by the compressor.Type: ApplicationFiled: May 19, 2021Publication date: November 24, 2022Inventors: Scott R. Miles, Danan Dou
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Publication number: 20220364501Abstract: An engine system includes an internal combustion engine, an energy storage device configured to provide electrical power, and an electrified air-boost system powered by the electrical power from the energy storage device to boost intake air to the engine, with the electrified air-boost system further including an electrical machine and a pressure device driven by the electrical machine to output boosted intake air to the engine. The engine system also includes a controller operably connected with the electrified air-boost system, with the controller configured to monitor engine speed and engine load during operation of the engine, identify an impending engine stall condition based on the monitored engine speed and engine load, and when the impending engine stall condition is identified, temporarily operate the electrified air-boost system to boost the intake air to the engine, thereby boosting a torque output of the engine.Type: ApplicationFiled: May 13, 2021Publication date: November 17, 2022Inventors: Scott R. Miles, Pratir R. Punjani, Danan Dou
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Publication number: 20220290599Abstract: A method of treating exhaust gas from an internal combustion engine as the exhaust gas passes through an exhaust gas pathway includes injecting reductant into the exhaust gas pathway with a reductant injector, filtering particulate matter from the exhaust gas with a first treatment element located downstream of the reductant injector, oxidizing soot on the first treatment element with ozone, and converting nitrogen oxides (NOx) from the exhaust gas with a second treatment element located downstream of the reductant injector.Type: ApplicationFiled: May 27, 2022Publication date: September 15, 2022Inventors: Danan Dou, Eric J. Hruby, Bryan T. Geisick
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EXHAUST GAS TREATMENT SYSTEM AND METHOD WITH REDUCTANT INJECTION AND CLOSE-COUPLED TREATMENT ELEMENT
Publication number: 20210317768Abstract: An exhaust gas treatment system for an internal combustion engine includes an exhaust gas pathway configured to receive exhaust gas from the internal combustion engine, a first treatment element positioned within the exhaust gas pathway, the first treatment element including a selective catalytic reduction (SCR) element, a first injector configured to selectively introduce ammonia gas into the exhaust gas pathway upstream of the first treatment element, a second injector configured to introduce diesel exhaust fluid into the exhaust gas pathway downstream of the first treatment element, and a second treatment element positioned within the exhaust gas pathway downstream of the second injector, the second treatment element including a SCR element.Type: ApplicationFiled: June 24, 2021Publication date: October 14, 2021Inventors: Danan Dou, Eric J. Hruby, Shyan-Cherng Huang -
Exhaust gas treatment system and method with reductant injection and close-coupled treatment element
Patent number: 11073067Abstract: An exhaust gas treatment system for an internal combustion engine includes an exhaust gas pathway configured to receive exhaust gas from the internal combustion engine and a first treatment element positioned within the exhaust gas pathway such that the first treatment element is close coupled to the engine. The first treatment element includes a NOx storage element. A first injector is configured to selectively introduce a first reductant into the exhaust gas pathway upstream of the first treatment element, and a second injector is configured to introduce a second reductant into the exhaust gas pathway downstream of the first treatment element. The system includes a second treatment element positioned within the exhaust gas pathway downstream of the second injector, and the second treatment element includes a selective catalytic reduction (SCR) element.Type: GrantFiled: January 10, 2019Date of Patent: July 27, 2021Assignee: DEERE & COMPANYInventors: Danan Dou, Eric J. Hruby, Shyan-Cherng Huang -
Patent number: 11022016Abstract: An exhaust gas treatment system for an internal combustion engine includes an exhaust gas pathway configured to receive exhaust from the engine, a diesel particulate filter (DPF) element positioned in the exhaust gas pathway to capture particulate matter from the exhaust, and a regenerator operable to increase a temperature of the exhaust that passes through the DPF element. The system also includes a controller configured to selectively operate the exhaust gas treatment system in a first mode in which the regenerator is inactive such that a temperature of the exhaust is within a first range, a second mode in which the regenerator is activated to increase the temperature of the exhaust to a first target temperature beyond the first range, and a third mode in which the regenerator is activated to increase the temperature of the exhaust to a second target temperature greater than the first temperature.Type: GrantFiled: January 3, 2019Date of Patent: June 1, 2021Assignee: DEERE & COMPANYInventors: Shyan-Cherng Huang, Danan Dou, Eric J. Hruby