Patents by Inventor Achuth Munnannur
Achuth Munnannur 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: 20230143888Abstract: An aftertreatment system comprises: a housing, a SCR system disposed in the housing. A mixer is disposed upstream of the SCR system and includes: a hub, a tubular member disposed circumferentially around the hub and defining a reductant entry port, and plurality of vanes extending from the hub to the tubular member such that openings are defined between adjacent vanes. The plurality of vanes swirl the exhaust gas in a circumferential direction. A reductant injector is disposed on the housing upstream of the SCR system along a transverse axis and configured to insert a reductant into the exhaust gas flowing through the housing through the reductant entry port. The reductant is inserted at a non-zero angle with respect to the transverse axis opposite the circumferential direction to achieve virtual interception. A mixer central axis is radially offset with respect to a housing central axis of the housing.Type: ApplicationFiled: February 11, 2021Publication date: May 11, 2023Applicant: Cummins Emission Solutions Inc.Inventors: Z. Gerald Liu, Apoorv Kalyankar, Achuth Munnannur
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Publication number: 20230108543Abstract: A multi-stage mixer includes a multi-stage mixer inlet, a multi-stage mixer outlet, a first flow device, and a second flow device. The multi-stage mixer inlet is configured to receive exhaust gas. The multi-stage mixer outlet is configured to provide the exhaust gas to a catalyst. The first flow device is configured to receive the exhaust gas from the multi-stage mixer inlet and to receive reductant such that the reductant is partially mixed with the exhaust gas within the first flow device. The first flow device includes a plurality of main vanes and a plurality of main vane apertures. The plurality of main vane apertures is interspaced between the plurality of main vanes. The plurality of main vane apertures is configured to receive the exhaust gas and to cooperate with the plurality of main vanes to provide the exhaust gas from the first flow device with a swirl flow.Type: ApplicationFiled: November 29, 2022Publication date: April 6, 2023Applicant: CUMMINS EMISSION SOLUTIONS INC.Inventors: Z. Gerald Liu, Apoorv Kalyankar, Achuth Munnannur, Niklas M. Schmidt, Roy W. Detra, Mihai Chiruta
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Patent number: 11585253Abstract: A liquid reductant injector nozzle includes a first portion defining a hollow cylindrical static chamber, in fluid communication with second portion defining a hollow frustoconical converging section, which is in turn in fluid communication with a sharp edged type discharge orifice. The hollow cylindrical static chamber is in reductant receiving communication with a reductant source, and has a first and second circular opening having equal diameters. The second circular opening is downstream of the first circular opening. The hollow frustoconical converging section is in reductant receiving communication with the hollow cylindrical static chamber via the second circular opening. Reductant received from the reductant source is discharged through the discharge orifice. A sidewall of the hollow cylindrical static chamber and a frustum side of the frustoconical converging section define an angle of convergence of the liquid reductant injector nozzle relative to a plane of the second circular opening.Type: GrantFiled: August 3, 2016Date of Patent: February 21, 2023Assignee: Cummins Emission Solutions Inc.Inventors: Z. Gerald Liu, Achuth Munnannur, Niklas Schmidt
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Patent number: 11542847Abstract: A multi-stage mixer includes a multi-stage mixer inlet, a multi-stage mixer outlet, a first flow device, and a second flow device. The multi-stage mixer inlet is configured to receive exhaust gas. The multi-stage mixer outlet is configured to provide the exhaust gas to a catalyst. The first flow device is configured to receive the exhaust gas from the multi-stage mixer inlet and to receive reductant such that the reductant is partially mixed with the exhaust gas within the first flow device. The first flow device includes a plurality of main vanes and a plurality of main vane apertures. The plurality of main vane apertures is interspaced between the plurality of main vanes. The plurality of main vane apertures is configured to receive the exhaust gas and to cooperate with the plurality of main vanes to provide the exhaust gas from the first flow device with a swirl flow.Type: GrantFiled: August 12, 2021Date of Patent: January 3, 2023Assignee: Cummins Emission Solutions Inc.Inventors: Z. Gerald Liu, Apoorv Kalyankar, Achuth Munnannur, Niklas M. Schmidt, Roy W. Detra, Mihai Chiruta
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Patent number: 11208927Abstract: An aftertreatment component includes an inlet connector tube, an outlet connector tube, a chamber, a flow dissipater, and a substrate. The inlet connector tube receives exhaust gasses. The chamber is between the inlet connector tube and the outlet connector tube. The flow dissipater is positioned around the inlet connector tube and within the chamber. The flow dissipater receives the exhaust gasses from the inlet connector tube and includes a plurality of perforations. The plurality of perforations defines an open area of the flow dissipater. The open area of the flow dissipater is greatest proximate to the inlet connector tube and progressively decreasing proximate to the outlet connector tube. The substrate is positioned within the chamber and receives the exhaust gasses from the flow dissipater and provides the treated exhaust gasses to the outlet connector tube. The exhaust gases are expelled through the flow dissipater via the plurality of perforations.Type: GrantFiled: January 27, 2017Date of Patent: December 28, 2021Assignee: Cummins Emission Solutions Inc.Inventors: Apoorv Kalyankar, Daniel Maciejewski, John G. Buechler, Ryan M. Johnson, Randolph G. Zoran, Achuth Munnannur
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Publication number: 20210372313Abstract: A multi-stage mixer includes a multi-stage mixer inlet, a multi-stage mixer outlet, a first flow device, and a second flow device. The multi-stage mixer inlet is configured to receive exhaust gas. The multi-stage mixer outlet is configured to provide the exhaust gas to a catalyst. The first flow device is configured to receive the exhaust gas from the multi-stage mixer inlet and to receive reductant such that the reductant is partially mixed with the exhaust gas within the first flow device. The first flow device includes a plurality of main vanes and a plurality of main vane apertures. The plurality of main vane apertures is interspaced between the plurality of main vanes. The plurality or main vane apertures is configured to receive the exhaust gas and to cooperate with the plurality of main vanes to provide the exhaust gas from the first flow device with a swirl flow.Type: ApplicationFiled: August 12, 2021Publication date: December 2, 2021Applicant: CUMMINS EMISSION SOLUTIONS INC.Inventors: Z. Gerald Liu, Apoorv Kalyankar, Achuth Munnannur, Niklas M. Schmidt, Roy W. Detra, Mihai Chiruta
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Patent number: 11136910Abstract: A multi-stage mixer includes a multi-stage mixer inlet, a multi-stage mixer outlet, a first flow device, and a second flow device. The multi-stage mixer inlet is configured to receive exhaust gas. The multi-stage mixer outlet is configured to provide the exhaust gas to a catalyst. The first flow device is configured to receive the exhaust gas from the multi-stage mixer inlet and to receive reductant such that the reductant is partially mixed with the exhaust gas within the first flow device. The first flow device includes a plurality of main vanes and a plurality of main vane apertures. The plurality of main vane apertures is interspaced between the plurality of main vanes. The plurality of main vane apertures is configured to receive the exhaust gas and to cooperate with the plurality of main vanes to provide the exhaust gas from the first flow device with a swirl flow.Type: GrantFiled: June 5, 2018Date of Patent: October 5, 2021Assignee: Cummins Emission Solutions Inc.Inventors: Z. Gerald Liu, Apoorv Kalyankar, Achuth Munnannur, Niklas M. Schmidt, Roy W. Detra, Mihai Chiruta
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Publication number: 20210131329Abstract: An aftertreatment component includes an inlet connector tube, an outlet connector tube, a chamber, a flow dissipater, and a substrate. The inlet connector tube receives exhaust gasses. The chamber is between the inlet connector tube and the outlet connector tube. The flow dissipater is positioned around the inlet connector tube and within the chamber. The flow dissipater receives the exhaust gasses from the inlet connector tube and includes a plurality of perforations. The plurality of perforations defines an open area of the flow dissipater. The open area of the flow dissipater is greatest proximate to the inlet connector tube and progressively decreasing proximate to the outlet connector tube. The substrate is positioned within the chamber and receives the exhaust gasses from the flow dissipater and provides the treated exhaust gasses to the outlet connector tube. The exhaust gases are expelled through the flow dissipater via the plurality of perforations.Type: ApplicationFiled: January 27, 2017Publication date: May 6, 2021Applicant: Cummins Emission Solutions Inc.Inventors: Apoorv KALYANKAR, Daniel MACIEJEWSKI, John G. BUECHLER, Ryan M. JOHNSON, Randolph G. ZORAN, Achuth MUNNANNUR
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Patent number: 10792626Abstract: A vane swirl mixer for exhaust aftertreatment includes: a vane swirl mixer inlet; a vane swirl mixer outlet; a first flow device including: a Venturi body; a plurality of upstream vanes positioned within the Venturi body; a plurality of upstream vane apertures interspaced between the plurality of upstream vanes; a plurality of downstream vanes positioned within the Venturi body; and a plurality of downstream vane apertures interspaced between the plurality of downstream vanes. At least one of the upstream vane hub and the downstream vane hub is radially offset from a Venturi center axis, thereby causing individual ones of the plurality of vanes coupled to the radially offset vane hub to differ in their geometry.Type: GrantFiled: March 25, 2020Date of Patent: October 6, 2020Assignee: Cummins Emission Solutions Inc.Inventors: Z. Gerald Liu, Apoorv Kalyankar, Achuth Munnannur, Niklas M. Schmidt, David Lee Dunnuck
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Patent number: 10632430Abstract: A vane swirl mixer for exhaust aftertreatment includes: a vane swirl mixer inlet; a vane swirl mixer outlet; a first flow device including: a Venturi body; a plurality of upstream vanes positioned within the Venturi body; a plurality of upstream vane apertures interspaced between the plurality of upstream vanes; a plurality of downstream vanes positioned within the Venturi body; and a plurality of downstream vane apertures interspaced between the plurality of downstream vanes. At least one of the upstream vane hub and the downstream vane hub is radially offset from a Venturi center axis, thereby causing individual ones of the plurality of vanes coupled to the radially offset vane hub to differ in their geometry.Type: GrantFiled: June 14, 2019Date of Patent: April 28, 2020Assignee: Cummins Emission Solutions Inc.Inventors: Z. Gerald Liu, Apoorv Kalyankar, Achuth Munnannur, Niklas M. Schmidt, David Lee Dunnuck
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Publication number: 20200123955Abstract: A multi-stage mixer includes a multi-stage mixer inlet, a multi-stage mixer outlet, a first flow device, and a second flow device. The multi-stage mixer inlet is configured to receive exhaust gas. The multi-stage mixer outlet is configured to provide the exhaust gas to a catalyst. The first flow device is configured to receive the exhaust gas from the multi-stage mixer inlet and to receive reductant such that the reductant is partially mixed with the exhaust gas within the first flow device. The first flow device includes a plurality of main vanes and a plurality of main vane apertures. The plurality of main vane apertures is interspaced between the plurality of main vanes. The plurality of main vane apertures is configured to receive the exhaust gas and to cooperate with the plurality of main vanes to provide the exhaust gas from the first flow device with a swirl flow.Type: ApplicationFiled: June 5, 2018Publication date: April 23, 2020Applicant: CUMMINS EMISSION SOLUTIONS INC.Inventors: Z. Gerald Liu, Apoorv Kalyankar, Achuth Munnannur, Niklas M. Schmidt, Roy W. Detra, Mihai Chiruta
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Patent number: 10493410Abstract: A selective catalytic reduction including a decomposition section including an intake chamber, with a swirl generating plate disposed in an internal volume of the intake chamber. The swirl generating plate includes a curved sidewall, a first end defining an opening, and a second end. The curved sidewall is oriented substantially normal to the direction of an intake flow of exhaust gas and a convex surface of the curved sidewall is oriented to face the direction of the intake flow. The swirl generating plate is configured to divide the intake flow into a first flow portion flowing through the opening, a second and a third flow portion which are directed substantially normal to the direction of intake flow and the flow direction of the first flow portion, and in opposite directions to each other towards a backwall of the intake chamber so as to create opposing swirls.Type: GrantFiled: January 9, 2015Date of Patent: December 3, 2019Assignee: Cummins Emission Solutions Inc.Inventors: Karthik Muruganantham, Achuth Munnannur, Deepesh Goyal, Rahul Suresh, Santosh Kumar Pradhan, Vinay Kumar Joshi, Ramayodhya Pandit
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Patent number: 9869225Abstract: A system and method for providing a selective catalytic reduction system with a doser mounting system. A mounting plate includes an aperture in a surface with a plurality of fastener brackets coupled to the surface. The fastener brackets are positioned about a peripheral portion of the aperture. The fastener brackets each include an opening for inserting a fastener. The opening is elevated from the surface of the mounting plate. The fasteners each have a fastener head and a fastener shaft positioned in the opening of the fastener brackets. The fastener shaft extends from the opening in a direction having an orthogonal component with respect to the surface of the mounting plate. A doser is coupled to the doser mounting system. The fastener shafts extend through openings in legs of the doser. An injector port of the doser is aligned with the aperture in the mounting plate.Type: GrantFiled: March 3, 2015Date of Patent: January 16, 2018Assignee: Cummins Emission Solutions, Inc.Inventors: Karthik Muruganantham, Achuth Munnannur, Deepesh Goyal, Ken Hummel, Vinay Kumar Joshi, Vipin Iyer
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Publication number: 20170354934Abstract: A selective catalytic reduction including a decomposition section including an intake chamber, with a swirl generating plate disposed in an internal volume of the intake chamber. The swirl generating plate includes a curved sidewall, a first end defining an opening, and a second end. The curved sidewall is oriented substantially normal to the direction of an intake flow of exhaust gas and a convex surface of the curved sidewall is oriented to face the direction of the intake flow. The swirl generating plate is configured to divide the intake flow into a first flow portion flowing through the opening, a second and a third flow portion which are directed substantially normal to the direction of intake flow and the flow direction of the first flow portion, and in opposite directions to each other towards a backwall of the intake chamber so as to create opposing swirls.Type: ApplicationFiled: January 9, 2015Publication date: December 14, 2017Applicant: Cummins Emission Solutions, Inc.Inventors: Karthik Muruganantham, Achuth Munnannur, Deepesh GOYAL, Rahul Suresh, Santosh Kumar Pradhan, Vinay Kumar Joshi, Ramayodhya Pandit
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Publication number: 20170037759Abstract: A liquid reductant injector nozzle includes a first portion defining a hollow cylindrical static chamber, in fluid communication with second portion defining a hollow frustoconical converging section, which is in turn in fluid communication with a sharp edged type discharge orifice. The hollow cylindrical static chamber is in reductant receiving communication with a reductant source, and has a first and second circular opening having equal diameters. The second circular opening is downstream of the first circular opening. The hollow frustoconical converging section is in reductant receiving communication with the hollow cylindrical static chamber via the second circular opening. Reductant received from the reductant source is discharged through the discharge orifice. A sidewall of the hollow cylindrical static chamber and a frustum side of the frustoconical converging section define an angle of convergence of the liquid reductant injector nozzle relative to a plane of the second circular opening.Type: ApplicationFiled: August 3, 2016Publication date: February 9, 2017Applicant: Cummins Emission Solutions Inc.Inventors: Z. Gerald Liu, Achuth Munnannur, Niklas Schmidt
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Patent number: 9482132Abstract: Systems and devices for delivering a fluid to an exhaust system. An inlet is configured for receiving the fluid, and a conduit includes openings for expelling the fluid into the exhaust system. A compact gaseous delivery system may include a first conduit in fluid communication with a fluid source, a second conduit in fluid communication with the first conduit, and a plurality of additional conduits in fluid communication with the second conduit and including a plurality of openings for expelling the fluid into the exhaust system. The first conduit, second conduit, and plurality of additional conduits may have axes that are substantially coplanar to form the compact gaseous delivery system that may be disposed within the exhaust system. Implementations may include openings with varying diameters. Other implementations may include a volute conduit with openings.Type: GrantFiled: November 7, 2013Date of Patent: November 1, 2016Assignee: CUMMINS EMISSION SOLUTIONS, INC.Inventors: Achuth Munnannur, Vinay Kumar Joshi, Douglas A. Mitchell
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Publication number: 20150252711Abstract: A system and method for providing a selective catalytic reduction system with a doser mounting system. A mounting plate includes an aperture in a surface with a plurality of fastener brackets coupled to the surface. The fastener brackets are positioned about a peripheral portion of the aperture. The fastener brackets each include an opening for inserting a fastener. The opening is elevated from the surface of the mounting plate. The fasteners each have a fastener head and a fastener shaft positioned in the opening of the fastener brackets. The fastener shaft extends from the opening in a direction having an orthogonal component with respect to the surface of the mounting plate. A doser is coupled to the doser mounting system. The fastener shafts extend through openings in legs of the doser. An injector port of the doser is aligned with the aperture in the mounting plate.Type: ApplicationFiled: March 3, 2015Publication date: September 10, 2015Applicant: Cummins Emission Solutions, Inc.Inventors: Karthik Muruganantham, Achuth Munnannur, Deepesh Goyal, Ken Hummel, Vinay Kumar Joshi, Vipin Iyer
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Patent number: 9057312Abstract: System and apparatus are disclosed for reducing reductant deposit formation in an exhaust aftertreatment system. A directing device is provided in the exhaust flow path upstream of a reductant opening into the exhaust flow path. The directing device is configured to direct an exhaust flow toward the reductant opening and around the directing device to effectively mix the exhaust flow with a reductant provided through the reductant opening to reduce the formation of reductant deposits.Type: GrantFiled: October 10, 2013Date of Patent: June 16, 2015Assignee: CUMMINS EMISSION SOLUTIONS, INC.Inventors: Achuth Munnannur, Mihai Chiruta, Matt Young, Deepesh Goyal, Karthik Muruganantham, Atul Abhyankar, Yogesh Birari
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Publication number: 20150121855Abstract: Systems and devices for delivering a fluid to an exhaust system. An inlet is configured for receiving the fluid, and a conduit includes openings for expelling the fluid into the exhaust system. A compact gaseous delivery system may include a first conduit in fluid communication with a fluid source, a second conduit in fluid communication with the first conduit, and a plurality of additional conduits in fluid communication with the second conduit and including a plurality of openings for expelling the fluid into the exhaust system. The first conduit, second conduit, and plurality of additional conduits may have axes that are substantially coplanar to form the compact gaseous delivery system that may be disposed within the exhaust system. Implementations may include openings with varying diameters. Other implementations may include a volute conduit with openings.Type: ApplicationFiled: November 7, 2013Publication date: May 7, 2015Applicant: Cummins Emission Solutions, Inc.Inventors: Achuth Munnannur, Vinay Kumar Joshi, Douglas A. Mitchell
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Publication number: 20150101318Abstract: System and apparatus are disclosed for reducing reductant deposit formation in an exhaust aftertreatment system. A directing device is provided in the exhaust flow path upstream of a reductant opening into the exhaust flow path. The directing device is configured to direct an exhaust flow toward the reductant opening and around the directing device to effectively mix the exhaust flow with a reductant provided through the reductant opening to reduce the formation of reductant deposits.Type: ApplicationFiled: October 10, 2013Publication date: April 16, 2015Applicant: CUMMINS EMISSION SOLUTIONS INC.Inventors: Achuth Munnannur, MIHAI CHIRUTA, MATT YOUNG, DEEPESH GOYAL, KARTHIK MURUGANANTHAM, ATUL ABHYANKAR, YOGESH BIRARI