Patents by Inventor Changsheng C. Su
Changsheng C. Su 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: 11753975Abstract: An exhaust aftertreatment system for increasing fractional efficiency of diesel or gasoline particulate filters includes a particulate filter that includes a housing and a filter substrate positioned in the housing. The filter substrate is pre-conditioned with an aqueous solution or suspension configured to decompose or evaporate in response to exposure to heat so as to precondition the filter substrate.Type: GrantFiled: December 5, 2022Date of Patent: September 12, 2023Assignee: Cummins Emission Solutions Inc.Inventors: Changsheng C. Su, A. Carl McDonald, Ramakrishna Gopal Dontha, Niklas M. Schmidt, Nathan A. Ottinger, Z. Gerald Liu, James C. Clerc, Yujun Wang
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Patent number: 11708775Abstract: A filtration assembly for removing particulate matter from exhaust gas produced by an engine, including: a first filter; a second filter positioned downstream of the first filter; and a valve including: a first ring defining a plurality of first openings, and a second ring defining a plurality of second openings, the second ring abutting the first ring. The valve is moveable between a closed position in which the plurality of first openings are misaligned with the plurality of second openings to prevent a fluid from flowing through the plurality of first and second openings, and an open position in which the second ring is rotated relative to the first ring such that the plurality of first openings are aligned with the plurality of second openings allowing the fluid to flow therethrough. A first end of the valve is positioned at an outlet of the first filter, and a second end of the valve is positioned at an inlet of the second filter.Type: GrantFiled: March 22, 2022Date of Patent: July 25, 2023Assignee: Cummins Emission Solutions Inc.Inventors: Yujun Wang, John K. Heichelbech, Changsheng C. Su
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Publication number: 20230160326Abstract: An exhaust aftertreatment system for increasing fractional efficiency of diesel or gasoline particulate filters includes a particulate filter that includes a housing and a filter substrate positioned in the housing. The filter substrate is pre-conditioned with an aqueous solution or suspension configured to decompose or evaporate in response to exposure to heat so as to precondition the filter substrate.Type: ApplicationFiled: December 5, 2022Publication date: May 25, 2023Applicant: CUMMINS EMISSION SOLUTIONS INC.Inventors: Changsheng C. Su, A. Carl McDonald, Ramakrishna Gopal Dontha, Niklas M. Schmidt, Nathan A. Ottinger, Z. Gerald Liu, James C. Clerc, Yujun Wang
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Patent number: 11643957Abstract: A control module for an aftertreatment system that includes a selective catalytic reduction (SCR) catalyst and an oxidation catalyst, comprises a controller configured to be operatively coupled to the aftertreatment system. The controller is configured to determine an actual SCR catalytic conversion efficiency of the SCR catalyst. The controller determines an estimated SCR catalytic conversion efficiency based on a test sulfur concentration selected by the controller. In response to the estimated SCR catalytic conversion efficiency being within a predefined range, the controller sets the test sulfur concentration as a determined sulfur concentration in a fuel provided to the engine. The controller generates a sulfur concentration signal indicating the determined sulfur.Type: GrantFiled: November 22, 2019Date of Patent: May 9, 2023Assignee: Cummins Emission Solutions Inc.Inventors: Jinqian Gong, Durvesh Ramesh Pathak, Changsheng C. Su, Gautam Sharma, Yuanzhou Xi
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Publication number: 20220412239Abstract: A control module for an aftertreatment system that includes a selective catalytic reduction (SCR) catalyst and an oxidation catalyst, comprises a controller configured to be operatively coupled to the aftertreatment system. The controller is configured to determine an actual SCR catalytic conversion efficiency of the SCR catalyst. The controller determines an estimated SCR catalytic conversion efficiency based on a test sulfur concentration selected by the controller. In response to the estimated SCR catalytic conversion efficiency being within a predefined range, the controller sets the test sulfur concentration as a determined sulfur concentration in a fuel provided to the engine. The controller generates a sulfur concentration signal indicating the determined sulfur.Type: ApplicationFiled: November 22, 2019Publication date: December 29, 2022Applicant: CUMMINS EMISSION SOLUTIONS INC.Inventors: Jinqian Gong, Durvesh Ramesh Pathak, Changsheng C. Su, Gautam Sharma, Yuanzhou Xi
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Patent number: 11525380Abstract: An aftertreatment system (100) includes a decomposition chamber (108), a reductant pump (120), a first dosing module (110), a second dosing module (112), and a controller (133). The first dosing module (110) is coupled to the decomposition chamber (108) and configured to receive reductant from the reductant pump (120). The second dosing module (112) is coupled to the decomposition chamber (108) and configured to receive reductant from the reductant pump (120) independent of the first dosing module (110). The controller (133) is communicatively coupled to the first dosing module (110) and the second dosing module (112). The controller (133) is configured to independently control a first volumetric flow rate of reductant provided from the first dosing module (110) into the decomposition chamber (108) and a second volumetric flow rate of reductant provided from the second dosing module (112) into the decomposition chamber (108).Type: GrantFiled: January 11, 2019Date of Patent: December 13, 2022Assignee: Cummins Emission Solutions Inc.Inventors: Changsheng C. Su, Liqiang Bian, Lei Jiang, Yi Xie
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Patent number: 11519310Abstract: An exhaust aftertreatment system for increasing fractional efficiency of diesel or gasoline particulate filters includes a particulate filter that includes a housing and a filter substrate positioned in the housing. The filter substrate is pre-conditioned with an aqueous solution or suspension configured to decompose or evaporate in response to exposure to heat so as to precondition the filter substrate.Type: GrantFiled: February 15, 2019Date of Patent: December 6, 2022Assignee: Cummins Emission Solutions Inc.Inventors: Changsheng C. Su, A. Carl McDonald, Jr., Ramakrishna Gopal Dontha, Niklas M. Schmidt, Nathan A. Ottinger, Z. Gerald Liu, James C. Clerc, Yujun Wang
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Patent number: 11480082Abstract: An aftertreatment system comprises a SCR system, a first filter, and a second filter disposed downstream of the first filter and a bypass conduit providing a flow path bypassing the second filter. A valve is operatively coupled to the bypass conduit and is moveable between a closed position in which the exhaust gas flows through the second filter, and an open position in which at least a portion of the exhaust gas flows through the bypass conduit. A controller is operatively coupled to the valve configured to adjust the valve based on a first filtration efficiency of the first filter to cause the exhaust gas expelled into the environment from the aftertreatment to have a particulate matter count meeting particulate matter emission standards.Type: GrantFiled: September 28, 2018Date of Patent: October 25, 2022Assignee: Cummins Emission Solutions Inc.Inventors: Yujun Wang, John K. Heichelbech, Changsheng C. Su
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Publication number: 20220213822Abstract: A filtration assembly for removing particulate matter from exhaust gas produced by an engine, including: a first filter; a second filter positioned downstream of the first filter; and a valve including: a first ring defining a plurality of first openings, and a second ring defining a plurality of second openings, the second ring abutting the first ring. The valve is moveable between a closed position in which the plurality of first openings are misaligned with the plurality of second openings to prevent a fluid from flowing through the plurality of first and second openings, and an open position in which the second ring is rotated relative to the first ring such that the plurality of first openings are aligned with the plurality of second openings allowing the fluid to flow therethrough. A first end of the valve is positioned at an outlet of the first filter, and a second end of the valve is positioned at an inlet of the second filter.Type: ApplicationFiled: March 22, 2022Publication date: July 7, 2022Applicant: Cummins Emission Solutions Inc.Inventors: Yujun Wang, John K. Heichelbech, Changsheng C. Su
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Publication number: 20220178285Abstract: An exhaust aftertreatment system for increasing fractional efficiency of diesel or gasoline particulate filters includes a particulate filter that includes a housing and a filter substrate positioned in the housing. The filter substrate is pre-conditioned with an aqueous solution or suspension configured to decompose or evaporate in response to exposure to heat so as to precondition the filter substrate.Type: ApplicationFiled: February 15, 2019Publication date: June 9, 2022Applicant: CUMMINS EMISSION SOLUTIONS INC.Inventors: Changsheng C. Su, A. Carl McDonald, JR., Ramakrishna Gopal Dontha, Niklas M. Schmidt, Nathan A. Ottinger, Z. Gerald Liu, James C. Clerc, Yujun Wang
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Publication number: 20220112824Abstract: A method includes: providing a SCR system comprising a SCR catalyst; heating the SCR system to a temperature greater than 500 degrees Celsius for a predetermined time so as to increase sulfur resistance of the SCR catalyst; and installing the SCR system in an aftertreatment system.Type: ApplicationFiled: January 10, 2020Publication date: April 14, 2022Applicant: Cummins Emission Solutions Inc.Inventors: Changsheng C. Su, Yuanzhou Xi, Jinqian Gong, Ramakrishna Gopal Dontha, Nathan A. Ottinger, Z. Gerald Liu, James C. Clerc
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Publication number: 20220034245Abstract: An aftertreatment system comprises a SCR system, a first filter, and a second filter disposed downstream of the first filter and a bypass conduit providing a flow path bypassing the second filter. A valve is operatively coupled to the bypass conduit and is moveable between a closed position in which the exhaust gas flows through the second filter, and an open position in which at least a portion of the exhaust gas flows through the bypass conduit. A controller is operatively coupled to the valve configured to adjust the valve based on a first filtration efficiency of the first filter to cause the exhaust gas expelled into the environment from the aftertreatment to have a particulate matter count meeting particulate matter emission standards.Type: ApplicationFiled: September 28, 2018Publication date: February 3, 2022Applicant: Cummins Emission Solutions Inc.Inventors: Yujun Wang, John K. Heichelbech, Changsheng C. Su
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Publication number: 20220025804Abstract: An aftertreatment system (100) includes a decomposition chamber (108), a reductant pump (120), a first dosing module (110), a second dosing module (112), and a controller (133). The first dosing module (110) is coupled to the decomposition chamber (108) and configured to receive reductant from the reductant pump (120). The second dosing module (112) is coupled to the decomposition chamber (108) and configured to receive reductant from the reductant pump (120) independent of the first dosing module (110). The controller (133) is communicatively coupled to the first dosing module (110) and the second dosing module (112). The controller (133) is configured to independently control a first volumetric flow rate of reductant provided from the first dosing module (110) into the decomposition chamber (108) and a second volumetric flow rate of reductant provided from the second dosing module (112) into the decomposition chamber (108).Type: ApplicationFiled: January 11, 2019Publication date: January 27, 2022Applicant: Cummins Emission Solution Inc.Inventors: Changsheng C. Su, Liqiang Bian, Lei Jiang, Yi Xie
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Patent number: 10989096Abstract: An aftertreatment system includes a filtration and reduction unit. The filtration and reduction unit comprises a housing defining an internal volume. A filter is disposed in the internal volume and is configured to substantially remove particulates from the exhaust gas. A selective catalytic reduction system is disposed in the internal volume downstream of the filter and is configured to selectively reduce a portion of the exhaust gas. A first catalyst is formulated to oxidize at least a portion of the exhaust gas. An intake pipe is disposed upstream of the filtration and reduction unit and configured to communicate the exhaust gas o the filtration and reduction unit. The first catalyst is disposed in the intake pipe. An exhaust pipe is disposed downstream of the filtration and reduction unit.Type: GrantFiled: July 29, 2019Date of Patent: April 27, 2021Assignee: Cummins Emission Solutions, Inc.Inventors: Yi Liu, Qiang Liu, Arvind V. Harinath, Changsheng C. Su, Behnam Bahrami, A. Carl McDonald, Stephen M. Holl
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Publication number: 20190353077Abstract: An aftertreatment system includes a filtration and reduction unit. The filtration and reduction unit comprises a housing defining an internal volume. A filter is disposed in the internal volume and is configured to substantially remove particulates from the exhaust gas. A selective catalytic reduction system is disposed in the internal volume downstream of the filter and is configured to selectively reduce a portion of the exhaust gas. A first catalyst is formulated to oxidize at least a portion of the exhaust gas. An intake pipe is disposed upstream of the filtration and reduction unit and configured to communicate the exhaust gas o the filtration and reduction unit. The first catalyst is disposed in the intake pipe. An exhaust pipe is disposed downstream of the filtration and reduction unit.Type: ApplicationFiled: July 29, 2019Publication date: November 21, 2019Applicant: Cummins Emission Solutions, Inc.Inventors: Yi Liu, Qiang Liu, Arvind V. Harinath, Changsheng C. Su, Behnam Bahrami, A. Carl McDonald, Stephen M. Holl
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Patent number: 10436097Abstract: An aftertreatment system includes a filtration and reduction unit. The filtration and reduction unit comprises a housing defining an internal volume. A filter is disposed in the internal volume and is configured to substantially remove particulates from the exhaust gas. A selective catalytic reduction system is disposed in the internal volume downstream of the filter and is configured to selectively reduce a portion of the exhaust gas. A first catalyst is formulated to oxidize at least a portion of the exhaust gas. An intake pipe is disposed upstream of the filtration and reduction unit and configured to communicate the exhaust gas to the filtration and reduction unit. The first catalyst is disposed in the intake pipe. An exhaust pipe is disposed downstream of the filtration and reduction unit.Type: GrantFiled: December 22, 2015Date of Patent: October 8, 2019Assignee: Cummins Emission Solutions Inc.Inventors: Yi Liu, Qiang Liu, Arvind V. Harinath, Changsheng C. Su, Behnam Bahrami, A. Carl McDonald, Stephen M. Holl
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Patent number: 10391449Abstract: A particulate filter for use in an exhaust aftertreatment system includes a ceramic substrate and a plurality of ceramic nanofibers associated with pores of the ceramic substrate. The plurality of ceramic nanofibers may be positioned on pores of the ceramic substrate, within pore channels of the ceramic substrate, or both on pores of the ceramic substrate and within pore channels of the ceramic substrate.Type: GrantFiled: November 8, 2017Date of Patent: August 27, 2019Assignee: Cummins Emission Solutions Inc.Inventors: Kavitha Moorthy, Matthew P. Henrichsen, Changsheng C. Su
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Publication number: 20190134563Abstract: A particulate filter for use in an exhaust aftertreatment system includes a ceramic substrate and a plurality of ceramic nanofibers associated with pores of the ceramic substrate. The plurality of ceramic nanofibers may be positioned on pores of the ceramic substrate, within pore channels of the ceramic substrate, or both on pores of the ceramic substrate and within pore channels of the ceramic substrate.Type: ApplicationFiled: November 8, 2017Publication date: May 9, 2019Applicant: Cummins Emission Solutions Inc.Inventors: Kavitha Moorthy, Matthew P. Henrichsen, Changsheng C. Su
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Patent number: 10099212Abstract: An oxidation catalyst may include hydrocarbon storage material. One implementation relates to a diesel oxidation catalyst that includes a catalyst having a front zone and a rear zone and a gradient of hydrocarbon storage material on the catalyst extending from the front zone to the rear zone. The gradient of hydrocarbon storage material, may comprise a linear gradient, a step gradient, a parabolic gradient, a logarithmic gradient, or other forms thereof.Type: GrantFiled: March 14, 2017Date of Patent: October 16, 2018Assignee: Cummins Emission Solutions Inc.Inventors: Shirish S. Punde, Arvind V. Harinath, Changsheng C. Su, Aravindh K. Kanakamedala
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Patent number: 10082062Abstract: A method for increasing a catalytic efficiency of a catalyst, comprising providing a catalyst. Finally, the catalyst is installed into a selective catalytic reduction system of an aftertreatment system configured to reduce constituents of an exhaust gas generated by an engine. The catalyst is soaked in a liquid which consists essentially of one of water or a water-comprising solution. The soaking occurs at least one of before or after installing the catalyst in the selective catalytic reduction system. The catalyst can include a copper zeolite catalyst.Type: GrantFiled: April 18, 2016Date of Patent: September 25, 2018Assignee: CUMMINS EMISSION SOLUTIONS, INC.Inventors: Nathan A. Ottinger, Z. Gerald Liu, Yuanzhou Xi, Rebecca A. Veele, Changsheng C. Su, Niklas Schmidt