Patents by Inventor Premjee Sasidharan
Premjee Sasidharan 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: 11959433Abstract: At least one server comprising at least one processor coupled to at least one memory storing instructions. The server can receive a first signal from a first monitored system comprising an internal combustion engine and a first sensor, the first signal associated with a first occurrence of an internal combustion engine event, a second occurrence of the internal combustion engine event, and first measurement data of the first sensor. The server can determine a first measurement from the first measurement data. The server can determine a second measurement from the first measurement data. The server can determine a measurement deviation between the first measurement and the second measurement. The server can compare the measurement deviation to a stored measurement threshold. The server can determine a first exhibited useful life of the first sensor based on the measurement deviation and at least one of the first measurement or the second measurement.Type: GrantFiled: July 19, 2022Date of Patent: April 16, 2024Assignee: Cummins Emission Solutions Inc.Inventors: Swapnali Gujar, Kapil Rajkumar Dhanwani, Kwadwo O. Owusu, Premjee Sasidharan, Alan H. Zhao, Jinqian Gong, Jeffrey Diwakar Abraham, Thomas C. Smith, Jr.
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Publication number: 20240026836Abstract: At least one server comprising at least one processor coupled to at least one memory storing instructions. The server can receive a first signal from a first monitored system comprising an internal combustion engine and a first sensor, the first signal associated with a first occurrence of an internal combustion engine event, a second occurrence of the internal combustion engine event, and first measurement data of the first sensor. The server can determine a first measurement from the first measurement data. The server can determine a second measurement from the first measurement data. The server can determine a measurement deviation between the first measurement and the second measurement. The server can compare the measurement deviation to a stored measurement threshold. The server can determine a first exhibited useful life of the first sensor based on the measurement deviation and at least one of the first measurement or the second measurement.Type: ApplicationFiled: July 19, 2022Publication date: January 25, 2024Applicant: Cummins Emission Solutions Inc.Inventors: Swapnali Gujar, Kapil Rajkumar Dhanwani, Kwadwo O. Owusu, Premjee Sasidharan, Alan H. Zhao, Jinqian Gong, Jeffrey Diwakar Abraham, Thomas C. Smith, JR.
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Patent number: 11732632Abstract: A system comprising an aftertreatment system comprising: a catalyst member, and a first exhaust conduit upstream of the catalyst member; a first temperature sensor operatively coupled to the catalyst member; a flow sensor coupled to the first exhaust conduit; and a controller. The controller determines a temperature of the catalyst member, a flow rate of exhaust within the first exhaust conduit, and a space velocity of the exhaust within the catalyst member. The controller determines a first degradation value indicative of a degradation of the catalyst member. The controller determines a first difference between the first degradation value and a first degradation reference value and a second difference between the first degradation value and a second degradation reference value. After determining that the first difference is less than the second difference, the controller selects a first calibration metric. The controller determines a first efficiency value associated with the catalyst member.Type: GrantFiled: July 29, 2022Date of Patent: August 22, 2023Assignee: Cummins Emission Solutions Inc.Inventors: Cami Brigette Ethington, Premjee Sasidharan, Huiling Li, Varun Sood
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Patent number: 11635011Abstract: A controller for controlling operation of an aftertreatment system that is configured to treat constituents of an exhaust gas produced by an engine, the aftertreatment system including a selective catalytic reduction (SCR) catalyst, the controller configured to: generate a short-term cumulative degradation estimate of the SCR catalyst corresponding to reversible degradation of the SCR catalyst due to sulfur and/or hydrocarbons based on a SCR catalyst temperature parameter; generate a long-term cumulative degradation estimate of the SCR catalyst corresponding to thermal aging of the SCR catalyst based on the SCR catalyst temperature parameter; generate a combined degradation estimate of the SCR catalyst based on the short-term cumulative degradation estimate and the long-term cumulative degradation estimate; and adjust an amount of reductant and/or an amount of hydrocarbons inserted into the aftertreatment system based on the combined degradation estimate of the SCR catalyst.Type: GrantFiled: September 9, 2022Date of Patent: April 25, 2023Assignee: Cummins Emission Solutions Inc.Inventors: James C. Clerc, Bradley V. Jones, Marc Alexander Greca, Santosh Kumar Ratan, Rohil Daya, Karthik Venkata Rama Krishna Dadi, Jinqian Gong, Bryon D. Staebler, Todd A. Corbet, Alain Ngoy Tschimwang, Premjee Sasidharan, David C. Hall
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Publication number: 20230003152Abstract: A controller for controlling operation of an aftertreatment system that is configured to treat constituents of an exhaust gas produced by an engine, the aftertreatment system including a selective catalytic reduction (SCR) catalyst, the controller configured to: generate a short-term cumulative degradation estimate of the SCR catalyst corresponding to reversible degradation of the SCR catalyst due to sulfur and/or hydrocarbons based on a SCR catalyst temperature parameter; generate a long-term cumulative degradation estimate of the SCR catalyst corresponding to thermal aging of the SCR catalyst based on the SCR catalyst temperature parameter; generate a combined degradation estimate of the SCR catalyst based on the short-term cumulative degradation estimate and the long-term cumulative degradation estimate; and adjust an amount of reductant and/or an amount of hydrocarbons inserted into the aftertreatment system based on the combined degradation estimate of the SCR catalyst.Type: ApplicationFiled: September 9, 2022Publication date: January 5, 2023Applicant: Cummins Emission Solutions Inc.Inventors: James C. Clerc, Bradley V. Jones, Marc Alexander Greca, Santosh Kumar Ratan, Rohil Daya, Karthik Venkata Rama Krishna Dadi, Jinqian Gong, Bryon D. Staebler, Todd A. Corbet, Alain Ngoy Tschimwang, Premjee Sasidharan, David C. Hall
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Patent number: 11293339Abstract: An engine system comprising an internal combustion engine and a turbocharger, where a diameter of the at least one intake valve is greater than a diameter of the at least one exhaust valve, the salient angle of the piston bowl is at least 10 degrees, the ratio between the piston bowl opening diameter and the piston bowl depth is approximately 0.5 to 2.0, the intake valve opens before top dead center on an exhaust stroke of the internal combustion engine and closes before bottom dead center of an intake stroke of the internal combustion engine, and the turbocharger has a combined efficiency of more than 50%.Type: GrantFiled: October 23, 2020Date of Patent: April 5, 2022Assignee: CUMMINS INC.Inventors: Philipe F. Saad, Leon A. LaPointe, Premjee Sasidharan, Atsuhiko Watanabe
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Publication number: 20210040880Abstract: An engine system comprising an internal combustion engine and a turbocharger, where a diameter of the at least one intake valve is greater than a diameter of the at least one exhaust valve, the salient angle of the piston bowl is at least 10 degrees, the ratio between the piston bowl opening diameter and the piston bowl depth is approximately 0.5 to 2.0, the intake valve opens before top dead center on an exhaust stroke of the internal combustion engine and closes before bottom dead center of an intake stroke of the internal combustion engine, and the turbocharger has a combined efficiency of more than 50%.Type: ApplicationFiled: October 23, 2020Publication date: February 11, 2021Applicant: Cummins Inc.Inventors: Philipe F. Saad, Leon A. LaPointe, Premjee Sasidharan, Atsuhiko Watanabe
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Patent number: 10815871Abstract: An engine system comprising an internal combustion engine and a turbocharger, where a diameter of the at least one intake valve is greater than a diameter of the at least one exhaust valve, the salient angle of the piston bowl is at least 10 degrees, the ratio between the piston bowl opening diameter and the piston bowl depth is approximately 0.5 to 2.0, the intake valve opens before top dead center on an exhaust stroke of the internal combustion engine and closes before bottom dead center of an intake stroke of the internal combustion engine, and the turbocharger has a combined efficiency of more than 50%.Type: GrantFiled: January 31, 2018Date of Patent: October 27, 2020Assignee: Cummins Inc.Inventors: Philipe F. Saad, Leon A. LaPointe, Premjee Sasidharan, Atsuhiko Watanabe
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Publication number: 20200018223Abstract: An engine system comprising an internal combustion engine and a turbocharger, where a diameter of the at least one intake valve is greater than a diameter of the at least one exhaust valve, the salient angle of the piston bowl is at least 10 degrees, the ratio between the piston bowl opening diameter and the piston bowl depth is approximately 0.5 to 2.0, the intake valve opens before top dead center on an exhaust stroke of the internal combustion engine and closes before bottom dead center of an intake stroke of the internal combustion engine, and the turbocharger has a combined efficiency of more than 50%.Type: ApplicationFiled: January 31, 2018Publication date: January 16, 2020Applicant: Cummins Inc.Inventors: Philipe F. Saad, Leon A. LaPointe, Premjee Sasidharan, Atsuhiko Watanabe
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Patent number: 9797296Abstract: Described herein is a combustion pre-chamber apparatus for a main combustion chamber of an internal combustion engine that includes a body that defines an internal combustion cavity. The apparatus also includes at least one orifice that extends through the body. The at least one orifice includes a first end open to the internal combustion cavity and a second end open to the main combustion chamber. The first end is bigger than the second end.Type: GrantFiled: March 15, 2013Date of Patent: October 24, 2017Assignee: Cummins Inc.Inventors: Premjee Sasidharan, Leon A. LaPointe
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Patent number: 9225151Abstract: A spark plug, and associated systems, for an internal combustion engine includes a central electrode that terminates at a first distal end surface defined about a central axis. The spark plug also includes at least one outer electrode that terminates at a second distal end surface. The at least one outer electrode at least partially laterally surrounds the central electrode such that the second distal end surface is radially offset relative to the central electrode and a lateral gap is defined between the central electrode and the at least one outer electrode. The spark plug include features that force or redirect movement of the flow of the fresh air-fuel mixture through the lateral gap to help to purge or move the residual exhaust gases left over from a previous combustion event out of the lateral gap.Type: GrantFiled: December 7, 2012Date of Patent: December 29, 2015Assignee: CUMMINS IP, INC.Inventors: Keith J. Douglas, Xiao Qin, Daniel J. O'Connor, Premjee Sasidharan
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Publication number: 20150020766Abstract: The disclosure is directed to an internal combustion engine having an improved prechamber device. The prechamber device includes features that provide improved mixing of fuel and air, specifically, a plurality of ribs positioned in a cavity of the prechamber device. The improved mixing of fuel and air yields improved uniformity of combustion in an associated combustion chamber.Type: ApplicationFiled: July 19, 2013Publication date: January 22, 2015Inventors: Leon A. LaPointe, Premjee Sasidharan
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Publication number: 20140261298Abstract: Described herein is a combustion pre-chamber apparatus for a main combustion chamber of an internal combustion engine that includes a body that defines an internal combustion cavity. The apparatus also includes at least one orifice that extends through the body. The at least one orifice includes a first end open to the internal combustion cavity and a second end open to the main combustion chamber. The first end is bigger than the second end.Type: ApplicationFiled: March 15, 2013Publication date: September 18, 2014Inventors: Premjee Sasidharan, Leon A. LaPointe