Patents by Inventor Madhuri Gandikota
Madhuri Gandikota 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: 11319853Abstract: An exhaust aftertreatment system for use with over-the-road vehicle is disclosed. The exhaust aftertreatment system includes a reducing agent mixer with a mixing can and a doser configured to inject heated and pressurized reducing agent into the mixing can for distribution throughout exhaust gases passed through the mixing can.Type: GrantFiled: March 31, 2020Date of Patent: May 3, 2022Assignee: Faurecia Emissions Control Technologies, USA, LLCInventors: Edward C. Kinnaird, John Rohde, Tony Parrish, Atul Shinde, Madhuri Gandikota
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Publication number: 20210301699Abstract: An exhaust aftertreatment system for use with over-the-road vehicle is disclosed. The exhaust aftertreatment system includes a reducing agent mixer with a mixing can and a doser configured to inject heated and pressurized reducing agent into the mixing can for distribution throughout exhaust gases passed through the mixing can.Type: ApplicationFiled: March 31, 2020Publication date: September 30, 2021Inventors: Edward C. Kinnaird, John Rohde, Tony Parrish, Atul Shinde, Madhuri Gandikota
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Publication number: 20210095588Abstract: A vehicle exhaust system includes a conduit defining an exhaust gas flow path extending along a center axis, and wherein the conduit includes a doser opening. An exhaust gas aftertreatment component is positioned downstream of the conduit and at least one doser is configured to inject fluid into the conduit through the doser opening. A heating element pre-heats the fluid prior to mixing with exhaust gas. A perforated pipe is positioned within the exhaust gas flow path to surround the fluid injected by the doser.Type: ApplicationFiled: September 27, 2019Publication date: April 1, 2021Inventors: Madhuri Gandikota, Eduardo Alano, Mahesh Mandiganahalli, Santosh Channappa, Jeff Prairie
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Patent number: 10920641Abstract: An exhaust aftertreatment system for use with over-the-road vehicle is disclosed. The exhaust aftertreatment system includes a reducing agent mixer with a mixing can and a flash-boil doser configured to inject heated and pressurized reducing agent into the mixing can for distribution throughout exhaust gases passed through the mixing can.Type: GrantFiled: April 5, 2019Date of Patent: February 16, 2021Assignee: Faurecia Emissions Control Technologies, USA, LLCInventors: Edward C. Kinnaird, John Rohde, Tony Parrish, Atul Shinde, Madhuri Gandikota
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Patent number: 10823031Abstract: An exhaust system includes a first exhaust after-treatment system receiving exhaust gases generated by an engine, a second exhaust after-treatment system downstream of the first exhaust after-treatment system, and at least one bypass connecting an engine outlet to an inlet to the second exhaust after-treatment system. A turbocharger is associated with the bypass and a bypass valve is located upstream of the turbocharger. The bypass valve is moveable between an open position to bypass exhaust gas flow to the first exhaust after-treatment system, a closed position to direct all exhaust gas flow to the first exhaust after-treatment system, and a partially open position where one portion of exhaust gas flow is directed into the first exhaust after-treatment system and a remaining portion of exhaust gas flow is directed into the turbocharger. A controller controls movement of the bypass valve between the open, closed, and partially open positions.Type: GrantFiled: September 20, 2018Date of Patent: November 3, 2020Assignee: Faurecia Emissions Control Technologies, USA, LLCInventors: John G. Rohde, Edward Kinnaird, Madhuri Gandikota
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Publication number: 20200318518Abstract: An exhaust aftertreatment system for use with over-the-road vehicle is disclosed. The exhaust aftertreatment system includes a reducing agent mixer with a mixing can and a flash-boil doser configured to inject heated and pressurized reducing agent into the mixing can for distribution throughout exhaust gases passed through the mixing can.Type: ApplicationFiled: April 5, 2019Publication date: October 8, 2020Inventors: Edward C. Kinnaird, John Rohde, Tony Parrish, Atul Shinde, Madhuri Gandikota
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Patent number: 10787946Abstract: A vehicle exhaust system includes a mixer housing that has a doser opening and defines an internal mixing chamber. A doser injects fluid into the mixer housing through the doser opening. A flow passage has an inlet end positioned adjacent the doser opening and an outlet end open to the mixing chamber. At least one heating device associated with the flow passage.Type: GrantFiled: September 19, 2018Date of Patent: September 29, 2020Assignee: Faurecia Emissions Control Technologies, USA, LLCInventors: John G. Rohde, Madhuri Gandikota
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Patent number: 10683787Abstract: An automotive exhaust aftertreatment system includes an onboard ammonium carbamate reactor. The onboard ammonium carbamate reactor is coupled to a diesel emission fluid reservoir also included in the system and is configured to generate aqueous ammonium carbamate solution from diesel emission fluid. A hybrid heating system for use with the ammonium carbamate reactor is provided in this disclosure.Type: GrantFiled: November 8, 2018Date of Patent: June 16, 2020Assignee: Faurecia Emissions Control Technologies, USA, LLCInventors: John Rohde, Edward Kinnaird, Madhuri Gandikota, Randy Cvelbar, Eric Ker
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Publication number: 20200149450Abstract: An automotive exhaust aftertreatment system includes an onboard ammonium carbamate reactor. The onboard ammonium carbamate reactor is coupled to a diesel emission fluid reservoir also included in the system and is configured to generate aqueous ammonium carbamate solution from diesel emission fluid. A hybrid heating system for use with the ammonium carbamate reactor is provided in this disclosure.Type: ApplicationFiled: November 8, 2018Publication date: May 14, 2020Inventors: John Rohde, Edward Kinnaird, Madhuri Gandikota, Randy Cvelbar, Eric Ker
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Publication number: 20200095913Abstract: An exhaust system includes a first exhaust after-treatment system receiving exhaust gases generated by an engine, a second exhaust after-treatment system downstream of the first exhaust after-treatment system, and at least one bypass connecting an engine outlet to an inlet to the second exhaust after-treatment system. A turbocharger is associated with the bypass and a bypass valve is located upstream of the turbocharger. The bypass valve is moveable between an open position to bypass exhaust gas flow to the first exhaust after-treatment system, a closed position to direct all exhaust gas flow to the first exhaust after-treatment system, and a partially open position where one portion of exhaust gas flow is directed into the first exhaust after-treatment system and a remaining portion of exhaust gas flow is directed into the turbocharger. A controller controls movement of the bypass valve between the open, closed, and partially open positions.Type: ApplicationFiled: September 20, 2018Publication date: March 26, 2020Inventors: John G. Rohde, Edward Kinnaird, Madhuri Gandikota
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Publication number: 20200088081Abstract: A vehicle exhaust system includes a mixer housing that has a doser opening and defines an internal mixing chamber. A doser injects fluid into the mixer housing through the doser opening. A flow passage has an inlet end positioned adjacent the doser opening and an outlet end open to the mixing chamber. At least one heating device associated with the flow passage.Type: ApplicationFiled: September 19, 2018Publication date: March 19, 2020Inventors: John G. Rohde, Madhuri Gandikota
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Patent number: 10450973Abstract: A system includes an internal combustion engine having a number of cylinders, with at least one of the cylinders plumbed to have a complete recycle of the exhaust gases from the cylinder. The system further includes the completely recycled cylinder having an EGR stroke cycle, and the non-recycled cylinders of the engine having an exhaust stroke cycle. The system includes the EGR stroke cycle being distinct from the exhaust stroke cycle. An amount and composition of the exhaust gases from the recycled cylinder are distinct from the amount and composition of the exhaust gases from the non-recycled cylinders, at least at certain operating conditions of the engine.Type: GrantFiled: April 5, 2017Date of Patent: October 22, 2019Assignee: Cummins Inc.Inventors: Samuel C. Geckler, Madhuri Gandikota, Rajkumar Subramanian, Axel Otto zur Loye
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Patent number: 10196993Abstract: A method includes substantially eliminating surge of a compressor and reducing specific fuel consumption and exhaust emissions of an engine by adjusting exhaust flow through an exhaust gas recirculation system, by adjusting airflow through a compressor recirculation valve, by adjusting fuel injection timing, or by adjusting a combination thereof in response to variance in a plurality of parameters. The parameters include quantity of exhaust emissions, a maximum in-cylinder pressure of the engine, an area ratio of an exhaust gas recirculation mixer of the exhaust gas recirculation system, estimated or sensed compressor surge, engine load, altitude of operation, or combinations of the parameters thereof.Type: GrantFiled: September 8, 2009Date of Patent: February 5, 2019Assignee: GE Global Sourcing LLCInventors: Manoj Prakash Gokhale, Madhuri Gandikota
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Patent number: 10082110Abstract: Systems, methods and techniques for exhaust gas recirculation are provided. The system includes mixing exhaust flow from at least one cylinder of an engine with air in an air intake system prior to combustion. The exhaust flow from the at least one cylinder is accumulated prior to mixing and distributed into the intake air system in a controlled manner.Type: GrantFiled: April 15, 2015Date of Patent: September 25, 2018Assignee: Cummins Inc.Inventors: Rajkumar Subramanian, Madhuri Gandikota, Marten H. Dane, Samuel C. Geckler, Sudhanshu Talwar
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Publication number: 20170204797Abstract: A system includes an internal combustion engine having a number of cylinders, with at least one of the cylinders plumbed to have a complete recycle of the exhaust gases from the cylinder. The system further includes the completely recycled cylinder having an EGR stroke cycle, and the non-recycled cylinders of the engine having an exhaust stroke cycle. The system includes the EGR stroke cycle being distinct from the exhaust stroke cycle. An amount and composition of the exhaust gases from the recycled cylinder are distinct from the amount and composition of the exhaust gases from the non-recycled cylinders, at least at certain operating conditions of the engine.Type: ApplicationFiled: April 5, 2017Publication date: July 20, 2017Inventors: Samuel C. Geckler, Madhuri Gandikota, Rajkumar Subramanian, Axel Otto zur Loye
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Patent number: 9631582Abstract: A system includes an internal combustion engine having a number of cylinders, with at least one of the cylinders plumbed to have a complete recycle of the exhaust gases from the cylinder. The system further includes the completely recycled cylinder having an EGR stroke cycle, and the non-recycled cylinders of the engine having an exhaust stroke cycle. The system includes the EGR stroke cycle being distinct from the exhaust stroke cycle. An amount and composition of the exhaust gases from the recycled cylinder are distinct from the amount and composition of the exhaust gases from the non-recycled cylinders, at least at certain operating conditions of the engine.Type: GrantFiled: December 24, 2014Date of Patent: April 25, 2017Assignee: Cummins Inc.Inventors: Samuel C. Geckler, Madhuri Gandikota, Rajkumar Subramanian, Axel Otto zur Loye
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Publication number: 20150292445Abstract: Systems, methods and techniques for exhaust gas recirculation are provided. The system includes mixing exhaust flow from at least one cylinder of an engine with air in an air intake system prior to combustion. The exhaust flow from the at least one cylinder is accumulated prior to mixing and distributed into the intake air system in a controlled manner.Type: ApplicationFiled: April 15, 2015Publication date: October 15, 2015Inventors: Rajkumar Subramanian, Madhuri Gandikota, Marten H. Dane, Samuel C. Geckler, Sudhanshu Talwar
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Publication number: 20150114341Abstract: A system includes an internal combustion engine having a number of cylinders, with at least one of the cylinders plumbed to have a complete recycle of the exhaust gases from the cylinder. The system further includes the completely recycled cylinder having an EGR stroke cycle, and the non-recycled cylinders of the engine having an exhaust stroke cycle. The system includes the EGR stroke cycle being distinct from the exhaust stroke cycle. An amount and composition of the exhaust gases from the recycled cylinder are distinct from the amount and composition of the exhaust gases from the non-recycled cylinders, at least at certain operating conditions of the engine.Type: ApplicationFiled: December 24, 2014Publication date: April 30, 2015Inventors: Samuel C. Geckler, Madhuri Gandikota, Rajkumar Subramanian, Axel Otto zur Loye
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Publication number: 20140020382Abstract: Systems, methods and techniques for exhaust gas recirculation are provided. The system includes mixing exhaust flow from at least one cylinder of an engine with air in an air intake system prior to combustion. The exhaust flow from the at least one cylinder is accumulated prior to mixing and distributed into the intake air system in a controlled manner.Type: ApplicationFiled: July 23, 2012Publication date: January 23, 2014Inventors: Rajkumar Subramanian, Madhuri Gandikota, Marten H. Dane, Samuel C. Geckler, Sudhanshu Talwar
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Publication number: 20110056199Abstract: A method includes substantially eliminating surge of a compressor and reducing specific fuel consumption and exhaust emissions of an engine by adjusting exhaust flow through an exhaust gas recirculation system, by adjusting airflow through a compressor recirculation valve, by adjusting fuel injection timing, or by adjusting a combination thereof in response to variance in a plurality of parameters. The parameters include quantity of exhaust emissions, a maximum in-cylinder pressure of the engine, an area ratio of an exhaust gas recirculation mixer of the exhaust gas recirculation system, estimated or sensed compressor surge, engine load, altitude of operation, or combinations of the parameters thereof.Type: ApplicationFiled: September 8, 2009Publication date: March 10, 2011Applicant: GENERAL ELECTRIC COMPANYInventors: Manoj Prakash Gokhale, Madhuri Gandikota