Patents by Inventor Yung T. Bui
Yung T. Bui 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: 11808187Abstract: A reduction device includes a housing defining an input chamber configured to receive exhaust from a power source, an output chamber, an exhaust channel configured to direct the exhaust from the input chamber to the output chamber, and a longitudinal axis. The reduction device also includes a treatment unit disposed in the exhaust channel and along the longitudinal axis. The treatment unit is configured to at least partly remove pollutant species from the exhaust. The reduction device also includes an attenuation component disposed in the housing and radially outward of the treatment unit. The attenuation component is fluidly connected to the exhaust channel, and is configured to attenuate a range of frequencies corresponding to operation of the power source. Additionally, the exhaust channel prohibits exhaust entering the input chamber from exiting the housing without passing through the treatment unit.Type: GrantFiled: March 1, 2021Date of Patent: November 7, 2023Assignee: Caterpillar Inc.Inventors: Dustin Irvin Landwehr, Jim K Carroll, David Charles Copley, Rakesh Chandran Ramachandran, Timothy Josiah Lee, Yung T. Bui, Anthony C. Rodman
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Publication number: 20220275737Abstract: A reduction device includes a housing defining an input chamber configured to receive exhaust from a power source, an output chamber, an exhaust channel configured to direct the exhaust from the input chamber to the output chamber, and a longitudinal axis. The reduction device also includes a treatment unit disposed in the exhaust channel and along the longitudinal axis. The treatment unit is configured to at least partly remove pollutant species from the exhaust. The reduction device also includes an attenuation component disposed in the housing and radially outward of the treatment unit. The attenuation component is fluidly connected to the exhaust channel, and is configured to attenuate a range of frequencies corresponding to operation of the power source. Additionally, the exhaust channel prohibits exhaust entering the input chamber from exiting the housing without passing through the treatment unit.Type: ApplicationFiled: March 1, 2021Publication date: September 1, 2022Applicant: Caterpillar Inc.Inventors: Dustin Irvin Landwehr, Jim K. Carroll, David Charles Copley, Rakesh Chandran Ramachandran, Timothy Josiah Lee, Yung T. Bui, Anthony C. Rodman
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Publication number: 20220047990Abstract: A two-stage mixer may include a guiding element and a mixing element. The guiding element may be configured to be fixedly mounted to an interior of an exhaust conduit. The mixing element may be configured to be fixedly mounted to the interior of the exhaust conduit in a position downstream from the guiding element. The mixing element may include a central disk, a plurality of mounting arms extending radially from the central disk, and a plurality of blades extending radially from the central disk. At least one mounting arm of the plurality of mounting arms may include a fin extending therefrom, and at least one blade of the plurality of blades may include a fin extending therefrom.Type: ApplicationFiled: August 11, 2020Publication date: February 17, 2022Applicant: Caterpillar Inc.Inventors: Yung T. BUI, Srinivasa Perumal VELU
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Patent number: 11247173Abstract: A two-stage mixer may include a guiding element and a mixing element. The guiding element may be configured to be fixedly mounted to an interior of an exhaust conduit. The mixing element may be configured to be fixedly mounted to the interior of the exhaust conduit in a position downstream from the guiding element. The mixing element may include a central disk, a plurality of mounting arms extending radially from the central disk, and a plurality of blades extending radially from the central disk. At least one mounting arm of the plurality of mounting arms may include a fin extending therefrom, and at least one blade of the plurality of blades may include a fin extending therefrom.Type: GrantFiled: August 11, 2020Date of Patent: February 15, 2022Assignee: Caterpillar Inc.Inventors: Yung T. Bui, Srinivasa Perumal Velu
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Patent number: 10766044Abstract: A reductant impingement device includes a proximal end having an impingement pin with a convex surface; and a distal end having a body concentric with a longitudinal axis of the impingement pin. The distal end includes a first surface and a second surface opposite the first surface. A plurality of inner channels connects the first surface and the second surface, and a plurality of outer channels connects the first surface and the second surface, where the plurality of inner channels are disposed in a circular array at a first radial distance from a longitudinal axis of the impingement pin, and the plurality of outer channels are disposed in a circular array at a second distance from the longitudinal axis of the impingement pin.Type: GrantFiled: November 21, 2018Date of Patent: September 8, 2020Assignee: Caterpillar Inc.Inventors: Yong Yi, Samprati Vijay Shah, Ian Aguirre, Yung T. Bui, Arvind Jujare, Erin Reim, Anthony C. Rodman
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Publication number: 20200224571Abstract: A nozzle including a nozzle body having a proximal end and a distal end. The proximal end includes at least a first inlet and a second inlet, and the distal end includes an outlet. An inner tube extends in a direction along a central longitudinal axis of the nozzle and at least partly defines a first channel fluidly connected to the first inlet and a second channel fluidly connected to the second inlet. The second channel fluidly connects to the first channel via one or more orifices extending through the inner tube.Type: ApplicationFiled: January 16, 2019Publication date: July 16, 2020Applicant: Caterpillar Inc.Inventors: Samprati Vijay Shah, Satya Ramakrishna Manda Venkata Naga, Ian Aguirre, Arvind Jujare, Yung T. Bui, Phillip Kyle Orman, Yong Yi
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Publication number: 20200156093Abstract: A reductant impingement device includes a proximal end having an impingement pin with a convex surface; and a distal end having a body concentric with a longitudinal axis of the impingement pin. The distal end includes a first surface and a second surface opposite the first surface. A plurality of inner channels connects the first surface and the second surface, and a plurality of outer channels connects the first surface and the second surface, where the plurality of inner channels are disposed in a circular array at a first radial distance from a longitudinal axis of the impingement pin, and the plurality of outer channels are disposed in a circular array at a second distance from the longitudinal axis of the impingement pin.Type: ApplicationFiled: November 21, 2018Publication date: May 21, 2020Applicant: Caterpillar Inc.Inventors: Yong Yi, Samprati Vijay Shah, Ian Aguirre, Yung T. Bui, Arvind Jujare, Erin Reim, Anthony C. Rodman
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Patent number: 9976470Abstract: An aftertreatment module is disclosed for use with an engine. The aftertreatment module may have an inlet housing at least partially defining an inlet passage for exhaust, and at least one mixer disposed in the inlet passage. The aftertreatment module may also have an outlet housing at least partially defining an outlet passage for exhaust, and a catalyst housing removably connected between the inlet housing and the outlet housing. The aftertreatment module may further have a plurality of catalyst substrates configured to be mounted in the catalyst housing, to receive exhaust from the inlet passage in parallel, and to discharge exhaust to the outlet housing in parallel.Type: GrantFiled: April 24, 2017Date of Patent: May 22, 2018Assignee: Caterpillar Inc.Inventors: Raymond U. Isada, Kurtis E. Chenoweth, Eric Spaeth, Ping Xiang, Yung T. Bui
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Publication number: 20170241322Abstract: An aftertreatment module is disclosed for use with an engine. The aftertreatment module may have an inlet housing at least partially defining an inlet passage for exhaust, and at least one mixer disposed in the inlet passage. The aftertreatment module may also have an outlet housing at least partially defining an outlet passage for exhaust, and a catalyst housing removably connected between the inlet housing and the outlet housing. The aftertreatment module may further have a plurality of catalyst substrates configured to be mounted in the catalyst housing, to receive exhaust from the inlet passage in parallel, and to discharge exhaust to the outlet housing in parallel.Type: ApplicationFiled: April 24, 2017Publication date: August 24, 2017Inventors: Raymond U. Isada, Kurtis E. Chenoweth, Eric Spaeth, Ping Xiang, Yung T. Bui
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Patent number: 9677447Abstract: An aftertreatment module is disclosed for use with an engine. The aftertreatment module may have an inlet housing at least partially defining an inlet passage for exhaust, and at least one mixer disposed in the inlet passage. The aftertreatment module may also have an outlet housing at least partially defining an outlet passage for exhaust, and a catalyst housing removably connected between the inlet housing and the outlet housing. The aftertreatment module may further have a plurality of catalyst substrates configured to be mounted in the catalyst housing, to receive exhaust from the inlet passage in parallel, and to discharge exhaust to the outlet housing in parallel.Type: GrantFiled: December 5, 2014Date of Patent: June 13, 2017Assignee: Caterpillar Inc.Inventors: Raymond Upano Isada, Kurtis Edward Chenoweth, Eric Spaeth, Ping Xiang, Yung T. Bui
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Publication number: 20170087514Abstract: A system for uniform flow distribution of a reductant is disclosed. The system includes an injector lance and a diffuser assembly. The injector lance further includes a reductant supply conduit and an injector lance. The reductant supply conduit extends into an internal diameter of an exhaust conduit from a first end of the exhaust conduit towards a second end of the exhaust conduit. The injector lance is in communication with and extends perpendicular to the reductant supply conduit. The injector lance is located along a longitudinal axis of the exhaust conduit. The diffuser assembly is further collocated or integral with the injector lance.Type: ApplicationFiled: September 30, 2015Publication date: March 30, 2017Applicant: Caterpillar Inc.Inventors: Mohamed Daoud, Yung T. Bui, Arvind Jujare, Kevin Weiss
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Publication number: 20160194995Abstract: A flow mixing device includes a body having a first end, a second end, and an interior volume defined between them. An inlet plate, coupled to the first end of the body, defines at least two inlet orifices in fluid communication with the interior volume. Similarly, an outlet plate, coupled to the second end defines an outlet passage of the flow mixing device. A diffuser conduit, coupled to the inlet plate, defines an inlet passage disposed in fluid communication with the respective inlet orifices. A separator plate assembly disposed in the interior volume extends partially between the first and second ends of the body. Flow guiding vanes, coupled proximal to the second end, extend partially within the diffuser conduit.Type: ApplicationFiled: March 11, 2016Publication date: July 7, 2016Applicant: Caterpillar Inc.Inventors: Kevin Weiss, Mohamed I. Daoud, Yung T. Bui, Arvind Jujare, Chiranjeevi Mangamuri, Timothy Alcenius
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Publication number: 20160160727Abstract: An aftertreatment module is disclosed for use with an engine. The aftertreatment module may have an inlet housing at least partially defining an inlet passage for exhaust, and at least one mixer disposed in the inlet passage. The aftertreatment module may also have an outlet housing at least partially defining an outlet passage for exhaust, and a catalyst housing removably connected between the inlet housing and the outlet housing. The aftertreatment module may further have a plurality of catalyst substrates configured to be mounted in the catalyst housing, to receive exhaust from the inlet passage in parallel, and to discharge exhaust to the outlet housing in parallel.Type: ApplicationFiled: December 5, 2014Publication date: June 9, 2016Applicant: CATERPILLAR INC.Inventors: Raymond Upano ISADA, Kurtis Edward CHENOWETH, Eric SPAETH, Ping XIANG, Yung T. BUI
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Patent number: 9302223Abstract: A mixing element positioned at an exhaust inlet of a Selective Catalytic Reduction (SCR) module is provided. The mixing element includes a base plate having a plurality of perforations thereon. The mixing element also includes a plurality of vanes connected to the base plate. Each of the plurality of vanes is spaced apart from one another. The plurality of vanes includes a plurality of flaps extending radially from the base plate. Each of the plurality of flaps has a planar configuration. The plurality of vanes also includes a plurality of blades attached to the plurality of flaps. Each of the plurality of blades extends axially with respect to an axis of the exhaust inlet. The blade has a curved configuration.Type: GrantFiled: June 13, 2014Date of Patent: April 5, 2016Assignee: Caterpillar Inc.Inventors: Yung T. Bui, Ping Xiang
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Publication number: 20150360176Abstract: A mixing element positioned at an exhaust inlet of a Selective Catalytic Reduction (SCR) module is provided. The mixing element includes a base plate having a plurality of perforations thereon. The mixing element also includes a plurality of vanes connected to the base plate. Each of the plurality of vanes is spaced apart from one another. The plurality of vanes includes a plurality of flaps extending radially from the base plate. Each of the plurality of flaps has a planar configuration. The plurality of vanes also includes a plurality of blades attached to the plurality of flaps. Each of the plurality of blades extends axially with respect to an axis of the exhaust inlet. The blade has a curved configuration.Type: ApplicationFiled: June 13, 2014Publication date: December 17, 2015Inventors: Yung T. Bui, Ping Xiang
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Patent number: 8999276Abstract: A mixing element positioned at an exhaust outlet of a Selective Catalytic Reduction (SCR) module is provided. The mixing element includes a base plate having an upper surface and a lower surface. The base plate is configured to deflect a portion of a flow of a fluid around the upper surface thereof. The mixing element also includes a plurality of vanes attached to the lower surface of the base plate in a spaced apart arrangement. The plurality of vanes is configured to induce a swirling effect in a flow of the fluid received therebetween.Type: GrantFiled: September 19, 2013Date of Patent: April 7, 2015Assignee: Caterpillar Inc.Inventor: Yung T. Bui
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Publication number: 20150078976Abstract: A mixing element positioned at an exhaust outlet of a Selective Catalytic Reduction (SCR) module is provided. The mixing element includes a base plate having an upper surface and a lower surface. The base plate is configured to deflect a portion of a flow of a fluid around the upper surface thereof. The mixing element also includes a plurality of vanes attached to the lower surface of the base plate in a spaced apart arrangement. The plurality of vanes is configured to induce a swirling effect in a flow of the fluid received therebetween.Type: ApplicationFiled: September 19, 2013Publication date: March 19, 2015Applicant: Caterpillar Inc.Inventor: Yung T. Bui
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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: 8511075Abstract: A combustion device for an exhaust treatment system is disclosed. The combustion device may have a fuel injector configured to inject fuel toward an exhaust flow. The combustion device may also have an ignition source configured to ignite the injected fuel. The combustion device may further have a deflector configured to redirect at least a portion of the ignited fuel towards a center of the exhaust flow.Type: GrantFiled: September 19, 2008Date of Patent: August 20, 2013Assignee: Caterpillar Inc.Inventors: Cory Andrew Brown, Glenn Brian Cox, Yung T. Bui