Patents by Inventor Srivardhan Chandrapati
Srivardhan Chandrapati 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: 20230207918Abstract: Various disclosed embodiments include illustrative control units, systems, and methods. In an illustrative embodiment, a control unit includes a processor and non-transitory computer-readable media that stores computer-executable instructions configured to cause the processor to determine a start charging time, receive a battery temperature value, and instruct the thermal control system to start heating the battery responsive to the start charging time and the battery temperature value in an energy saving way.Type: ApplicationFiled: December 29, 2021Publication date: June 29, 2023Inventors: Khaled Bahei-Eldin, Ming Ma, Curtis Wesley, Srivardhan Chandrapati
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Patent number: 10094259Abstract: A reductant delivery system is provided for delivery of reductant to an engine exhaust aftertreatment system that is heated during cold temperature conditions. A heat exchange fluid flows through a heat exchange circuit that provides a flow path from the heat source to the doser, from the doser to the reductant storage tank, and from the reductant storage tank to the heat source. A control valve controls the flow of the heat exchange fluid in the heat exchange circuit so that at least one heat exchange cycle includes a circulation period that increases the temperature of the reductant in the doser and storage tank and a termination period where circulation is stopped until reductant temperature in the doser reaches a lower limit.Type: GrantFiled: September 9, 2016Date of Patent: October 9, 2018Assignee: Cummins Emission Solutions Inc.Inventors: Mugdha Naik, Yongquan Chai, Shu Zhang, Xin Jin, Srivardhan Chandrapati, James Houghtell, Deepu J. Chandy
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Patent number: 9719392Abstract: A system is provided for delivery of diesel exhaust fluid or other reductant to an injector for release into an engine exhaust aftertreatment system. The injector includes a nozzle assembly that thermally shields the diesel exhaust fluid from the exhaust gas temperatures. A diesel exhaust fluid delivery procedure is also disclosed for nozzle cooling prior to operation of the injector for emissions reduction.Type: GrantFiled: March 2, 2017Date of Patent: August 1, 2017Assignee: Cummins Emission Solutions Inc.Inventors: Aalok Trivedi, Andrew Myer, Stephanie L. Apewokin, Samuel Johnson, Srivardhan Chandrapati, George L. Muntean, Joshua D. Henry, John Anthis, Omkar Tendolkar
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Patent number: 9689291Abstract: According to one embodiment, a diesel exhaust fluid purging system includes a metering valve with a supply port and a delivery port. The purging system also includes a pump assembly that is fluidly connected to the supply port of the metering valve. The pump assembly includes a pump and a single supply line that is fluidly connectable with a diesel exhaust fluid source. The purging system further includes an injection assembly that is fluidly connected to the delivery port of the metering valve. The injection assembly includes an air supply line that is fluidly connectable with an air supply source. Additionally, the purging system includes a controller in electrical communication with the metering valve, the pump assembly, and the injection assembly. The controller is configured to purge the pump assembly of residual diesel exhaust fluid using air from the air supply line.Type: GrantFiled: March 14, 2014Date of Patent: June 27, 2017Assignee: Cummins IP, Inc.Inventors: Shu Zhang, Srivardhan Chandrapati, Mugdha Naik, Srinivasa V. Rajagopalan, Wei Huang, George Muntean, Andrew Myer
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Publication number: 20170175608Abstract: A system is provided for delivery of diesel exhaust fluid or other reductant to an injector for release into an engine exhaust aftertreatment system. The injector includes a nozzle assembly that thermally shields the diesel exhaust fluid from the exhaust gas temperatures. A diesel exhaust fluid delivery procedure is also disclosed for nozzle cooling prior to operation of the injector for emissions reduction.Type: ApplicationFiled: March 2, 2017Publication date: June 22, 2017Applicant: Cummins Emission Solutions Inc.Inventors: Aalok TRIVEDI, Andrew MYER, Stephanie L. APEWOKIN, Samuel JOHNSON, Srivardhan CHANDRAPATI, George L. MUNTEAN, Joshua D. HENRY, John ANTHIS, Omkar TENDOLKAR
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Patent number: 9617889Abstract: A system is provided for delivery of diesel exhaust fluid or other reductant to an injector for release into an engine exhaust aftertreatment system. The injector includes a nozzle assembly that thermally shields the diesel exhaust fluid from the exhaust gas temperatures. A diesel exhaust fluid delivery procedure is also disclosed for nozzle cooling prior to operation of the injector for emissions reduction.Type: GrantFiled: December 2, 2015Date of Patent: April 11, 2017Assignee: CUMMINS EMISSION SOLUTIONS INC.Inventors: Aalok Trivedi, Andrew Myer, Stephanie L. Apewokin, Samuel Johnson, Srivardhan Chandrapati, George L. Muntean, Joshua D. Henry, John Anthis, Omkar Tendolkar
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Publication number: 20160376964Abstract: A reductant delivery system is provided for delivery of reductant to an engine exhaust aftertreatment system that is heated during cold temperature conditions. A heat exchange fluid flows through a heat exchange circuit that provides a flow path from the heat source to the doser, from the doser to the reductant storage tank, and from the reductant storage tank to the heat source. A control valve controls the flow of the heat exchange fluid in the heat exchange circuit so that at least one heat exchange cycle includes a circulation period that increases the temperature of the reductant in the doser and storage tank and a termination period where circulation is stopped until reductant temperature in the doser reaches a lower limit.Type: ApplicationFiled: September 9, 2016Publication date: December 29, 2016Applicant: Cummins Emission Solutions Inc.Inventors: Mugdha NAIK, Yongquan CHAI, Shu ZHANG, Xin JIN, Srivardhan CHANDRAPATI, James HOUGHTELL, Deepu J. CHANDY
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Patent number: 9458746Abstract: A reductant delivery system is provided for delivery of reductant to an engine exhaust aftertreatment system that is heated during cold temperature conditions. A heat exchange fluid flows through a heat exchange circuit that provides a flow path from the heat source to the doser, from the doser to the reductant storage tank, and from the reductant storage tank to the heat source. A control valve controls the flow of the heat exchange fluid in the heat exchange circuit so that at least one heat exchange cycle includes a circulation period that increases the temperature of the reductant in the doser and storage tank and a termination period where circulation is stopped until reductant temperature in the doser reaches a lower limit.Type: GrantFiled: March 1, 2013Date of Patent: October 4, 2016Assignee: CUMMINS EMISSION SOLUTIONS INC.Inventors: Mugdha Naik, Yongquan Chai, Shu Zhang, Xin Jin, Srivardhan Chandrapati, James Houghtell, Deepu J. Chandy
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Patent number: 9441518Abstract: An example system includes a diaphragm pump having a suction port and a discharge port, a urea suction line fluidly coupling a urea supply to the suction port, and a urea discharge line fluidly coupled to the discharge port. A recirculation line fluidly couples the urea discharge line to the urea suction line, and has a flow regulator operationally coupled thereto. A controller is configured to interpret a prime loss condition of the diaphragm pump, and to provide a flow regulator command in response to the prime loss condition.Type: GrantFiled: August 8, 2014Date of Patent: September 13, 2016Assignee: Cummins Emission Solutions, Inc.Inventors: Srivardhan Chandrapati, Andrew Morgan Myer, Mugdha Naik, Shu Zhang, Xin Jin, Srinivasa Varadan Rajagopalan, John K. Heichelbech, Stephen M. Holl
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Publication number: 20160084131Abstract: A system is provided for delivery of diesel exhaust fluid or other reductant to an injector for release into an engine exhaust aftertreatment system. The injector includes a nozzle assembly that thermally shields the diesel exhaust fluid from the exhaust gas temperatures. A diesel exhaust fluid delivery procedure is also disclosed for nozzle cooling prior to operation of the injector for emissions reduction.Type: ApplicationFiled: December 2, 2015Publication date: March 24, 2016Applicant: Cummins Emission Solutions Inc.Inventors: Aalok TRIVEDI, Andrew MYER, Stephanie L. APEWOKIN, Samuel JOHNSON, Srivardhan CHANDRAPATI, George L. MUNTEAN, Joshua D. HENRY, John ANTHIS, Omkar TENDOLKAR
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Publication number: 20160040575Abstract: According to one embodiment, a diesel exhaust fluid purging system includes a metering valve with a supply port and a delivery port. The purging system also includes a pump assembly that is fluidly connected to the supply port of the metering valve. The pump assembly includes a pump and a single supply line that is fluidly connectable with a diesel exhaust fluid source. The purging system further includes an injection assembly that is fluidly connected to the delivery port of the metering valve. The injection assembly includes an air supply line that is fluidly connectable with an air supply source. Additionally, the purging system includes a controller in electrical communication with the metering valve, the pump assembly, and the injection assembly. The controller is configured to purge the pump assembly of residual diesel exhaust fluid using air from the air supply line.Type: ApplicationFiled: March 14, 2014Publication date: February 11, 2016Applicant: Cummins IP, Inc.Inventors: Shu ZHANG, Srivardhan Chandrapati, Mugdha Naik, Srinivasa V. Rajagopalan, Wei Huang, George Muntean, Andrew Myer
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Patent number: 9234445Abstract: A system is provided for delivery of diesel exhaust fluid or other reductant to an injector for release into an engine exhaust aftertreatment system. The injector includes a nozzle assembly that thermally shields the diesel exhaust fluid from the exhaust gas temperatures. A diesel exhaust fluid delivery procedure is also disclosed for nozzle cooling prior to operation of the injector for emissions reduction.Type: GrantFiled: June 6, 2013Date of Patent: January 12, 2016Assignee: Cummins Emission Solutions Inc.Inventors: Aalok Trivedi, Andrew Myer, Stephanie L. Apewokin, Samuel Johnson, Srivardhan Chandrapati, George L. Muntean, Joshua D. Henry, John Anthis, Omkar Tendolkar
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Publication number: 20150047727Abstract: An example system includes a diaphragm pump having a suction port and a discharge port, a urea suction line fluidly coupling a urea supply to the suction port, and a urea discharge line fluidly coupled to the discharge port. A recirculation line fluidly couples the urea discharge line to the urea suction line, and has a flow regulator operationally coupled thereto. A controller is configured to interpret a prime loss condition of the diaphragm pump, and to provide a flow regulator command in response to the prime loss condition.Type: ApplicationFiled: August 8, 2014Publication date: February 19, 2015Applicant: Cummins Emission Solutions, Inc.Inventors: Srivardhan CHANDRAPATI, Andrew Morgan Myer, Mugdha Naik, Shu Zhang, Xin Jin, Srinivasa Varadan Rajagopalan, John K. HEICHELBECH, Stephen M. Holl
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Patent number: 8920757Abstract: Reductant dosing systems and methods for engine exhaust aftertreatment are disclosed. The opening and closing of a metering valve in the reductant dosing system is controlled in a manner that mitigates pressure oscillations in the dosing system. The metering valve is opened in response to the dosing command exceeding a minimum threshold value and the differential pressure across the metering valve exceeding a differential pressure threshold. The metering valve is closed in response to either the differential pressure across the metering valve dropping below a differential pressure threshold or the actual dosed quantity exceeding the dosing command.Type: GrantFiled: October 24, 2013Date of Patent: December 30, 2014Assignee: Cummins Emission Solutions Inc.Inventors: Srivardhan Chandrapati, Yongquan Chai, Stephen M. Holl, Shu Zhang
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Publication number: 20140363357Abstract: A system is provided for delivery of diesel exhaust fluid or other reductant to an injector for release into an engine exhaust aftertreatment system. The injector includes a nozzle assembly that thermally shields the diesel exhaust fluid from the exhaust gas temperatures. A diesel exhaust fluid delivery procedure is also disclosed for nozzle cooling prior to operation of the injector for emissions reduction.Type: ApplicationFiled: June 6, 2013Publication date: December 11, 2014Applicant: Cummins Emission Solutions Inc.Inventors: Aalok Trivedi, Andrew Myer, Stephanie L. Apewokin, Samuel Johnson, Srivardhan Chandrapati, George G. Muntean, Joshua D. Henry, John Anthis, Omkar Tendolkar
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Publication number: 20140245722Abstract: A reductant delivery system is provided for delivery of reductant to an engine exhaust aftertreatment system that is heated during cold temperature conditions. A heat exchange fluid flows through a heat exchange circuit that provides a flow path from the heat source to the doser, from the doser to the reductant storage tank, and from the reductant storage tank to the heat source. A control valve controls the flow of the heat exchange fluid in the heat exchange circuit so that at least one heat exchange cycle includes a circulation period that increases the temperature of the reductant in the doser and storage tank and a termination period where circulation is stopped until reductant temperature in the doser reaches a lower limit.Type: ApplicationFiled: March 1, 2013Publication date: September 4, 2014Applicant: Cummins Emission Solutions Inc,Inventors: Mugdha Naik, Yongquan Chai, Shu Zhang, Xin Jin, Srivardhan Chandrapati, James Houghtell, Deepu J. Chandy