Patents by Inventor Shashank Mupparapu
Shashank Mupparapu 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: 9009967Abstract: A composite catalyst substrate is provided, which may include a metallic core and a porous ceramic coating on the metallic core. The substrate may also include a washcoat substantially covering the ceramic coating and including a catalyst material configured to react with constituents in an exhaust flow of an exhaust producing engine. The catalyst material may be dispersed in, or coated on, the washcoat.Type: GrantFiled: July 31, 2008Date of Patent: April 21, 2015Assignee: Caterpillar Inc.Inventor: Shashank Mupparapu
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Patent number: 8752370Abstract: An exhaust aftertreatment system including a housing with two or more inlets configured to receive separate entering exhaust streams from an engine. The system may include two or more first exhaust treatment devices, each configured to receive one of the separate entering exhaust streams in a first direction. The system may further include two or more redirecting flow passages configured to combine the separate exhaust streams into a merged exhaust stream that flows in a second direction about 180 degrees from the first direction and an intermediate flow region configured to divide the merged exhaust stream into two or more separate exiting exhaust streams. The system also may also includes two or more second exhaust treatment devices, each configured to receive one of the separate exiting exhaust streams in a third direction about 90 degrees from the second direction.Type: GrantFiled: December 9, 2010Date of Patent: June 17, 2014Assignee: Caterpillar Inc.Inventors: Craig P. Hittle, Stephan D. Roozenboom, Tetsu O. Velasquez, Paul W. Park, Shashank Mupparapu, Rick E. Jeffs, Michael P. Boahene, Yung T. Bui
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Patent number: 8635861Abstract: An exhaust aftertreatment system including an exhaust flow area, a first bank of one or more exhaust treatment devices in fluid communication with the exhaust flow area and a second bank of one or more exhaust treatment devices in fluid communication with the exhaust flow area. The first bank may be arranged in parallel with the second bank and inlet of the first bank is configured to provide greater flow resistance to the exhaust than the inlet of the second bank.Type: GrantFiled: September 14, 2010Date of Patent: January 28, 2014Assignee: Caterpillar Inc.Inventors: Jinhui Sun, Yung T. Bui, Michael P. Boahene, Shashank Mupparapu
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Patent number: 8459012Abstract: A method for purging reductant from a reductant supply system is disclosed. The method includes dispensing reductant into an exhaust system via a dispensing device. The method also includes purging the dispensing device by urging reductant from the dispensing device to a reductant source.Type: GrantFiled: November 19, 2008Date of Patent: June 11, 2013Assignee: Caterpillar Inc.Inventors: Jinhui Sun, Shashank Mupparapu, Theodore J. Tarabulski, Paul W. Park
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Publication number: 20130067891Abstract: An exhaust aftertreatment system including a housing with two or more inlets configured to receive separate entering exhaust streams from an engine. The system may include two or more first exhaust treatment devices, each configured to receive one of the separate entering exhaust streams in a first direction. The system may further include two or more redirecting flow passages configured to combine the separate exhaust streams into a merged exhaust stream that flows in a second direction about 180 degrees from the first direction and an intermediate flow region configured to divide the merged exhaust stream into two or more separate exiting exhaust streams. The system also may also includes two or more second exhaust treatment devices, each configured to receive one of the separate exiting exhaust streams in a third direction about 90 degrees from the second direction.Type: ApplicationFiled: September 28, 2010Publication date: March 21, 2013Inventors: Craig Hittle, Stephan D. Roozenboom, Tetsu O. Velasquez, Pauk W. Park, Shashank Mupparapu, Rick E. Jeffs, Michael P. Boahene, Yung T. Bui
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Patent number: 8393142Abstract: A reductant dosing manifold is disclosed. The reductant dosing manifold may have a housing with a pump interface configured to directly connect the reductant dosing manifold to a reductant pump, and a reductant supply passage in fluid communication with the pump interface. The housing may also have a reductant outlet port, and a pressurized reductant passage connecting the pump interface to the reductant outlet port.Type: GrantFiled: April 30, 2010Date of Patent: March 12, 2013Assignee: Caterpillar Inc.Inventors: Shashank Mupparapu, Raymond Upano Isada, Stephan D. Roozenboom, Michael R. Errera, Bryce L. Tiller
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Patent number: 8291926Abstract: A reductant dosing system for a machine having an engine and an exhaust system is disclosed. The reductant dosing system has a tank configured to hold a reductant, a dosing arrangement, and a supply passage connecting the tank to the dosing arrangement. The reductant dosing system also has a purging arrangement configured to direct purge fluid to at least one of the dosing arrangement and the supply passage, and a valve configured to allow reductant to pass from the tank to the supply passage and to inhibit purge fluid from entering the tank.Type: GrantFiled: February 20, 2009Date of Patent: October 23, 2012Assignee: Caterpillar Inc.Inventors: Sairam P. Thiagarajan, Stephan D. Roozenboom, Raymond B. Gerges, Jinhui Sun, Shashank Mupparapu, Tetsu O. Velasquez, Yung T. Bui
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Publication number: 20110265459Abstract: A reductant dosing manifold is disclosed. The reductant dosing manifold may have a housing with a pump interface configured to directly connect the reductant dosing manifold to a reductant pump, and a reductant supply passage in fluid communication with the pump interface. The housing may also have a reductant outlet port, and a pressurized reductant passage connecting the pump interface to the reductant outlet port.Type: ApplicationFiled: April 30, 2010Publication date: November 3, 2011Inventors: Shashank MUPPARAPU, Raymond Upano Isada, Stephan D. Roozenboom, Michael R. Errera, Bryce L. Tiller
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Publication number: 20110146236Abstract: An exhaust aftertreatment system including an exhaust flow area, a first bank of one or more exhaust treatment devices in fluid communication with the exhaust flow area and a second bank of one or more exhaust treatment devices in fluid communication with the exhaust flow area.Type: ApplicationFiled: September 14, 2010Publication date: June 23, 2011Applicant: Caterpillar Inc.Inventors: Jinhui Sun, Yung T. Bui, Michael P. Boahene, Shashank Mupparapu
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Publication number: 20100212290Abstract: A reductant dosing system for a machine having an engine and an exhaust system is disclosed. The reductant dosing system has a tank configured to hold a reductant, a dosing arrangement, and a supply passage connecting the tank to the dosing arrangement. The reductant dosing system also has a purging arrangement configured to direct purge fluid to at least one of the dosing arrangement and the supply passage, and a valve configured to allow reductant to pass from the tank to the supply passage and to inhibit purge fluid from entering the tank.Type: ApplicationFiled: February 20, 2009Publication date: August 26, 2010Inventors: Sairam P. THIAGARAJAN, Stephan D. Roozenboom, Raymond B. Gerges, Jinhui Sun, Shashank Mupparapu, Tetsu O. Velasquez, Yung T. Bui
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Publication number: 20100122521Abstract: A method for purging reductant from a reductant supply system is disclosed. The method includes dispensing reductant into an exhaust system via a dispensing device. The method also includes purging the dispensing device by urging reductant from the dispensing device to a reductant source.Type: ApplicationFiled: November 19, 2008Publication date: May 20, 2010Inventors: Jinhui Sun, Shashank Mupparapu, Theodore J. Tarabulski, Paul W. Park
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Publication number: 20100028220Abstract: A composite catalyst substrate is provided, which may include a metallic core and a porous ceramic coating on the metallic core. The substrate may also include a washcoat substantially covering the ceramic coating and including a catalyst material configured to react with constituents in an exhaust flow of an exhaust producing engine. The catalyst material may be dispersed in, or coated on, the washcoat.Type: ApplicationFiled: July 31, 2008Publication date: February 4, 2010Inventor: Shashank Mupparapu