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).

  • Publication number: 20220275737
    Abstract: 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: Application
    Filed: March 1, 2021
    Publication date: September 1, 2022
    Applicant: Caterpillar Inc.
    Inventors: Dustin Irvin Landwehr, Jim K. Carroll, David Charles Copley, Rakesh Chandran Ramachandran, Timothy Josiah Lee, Yung T. Bui, Anthony C. Rodman
  • Publication number: 20220047990
    Abstract: 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: Application
    Filed: August 11, 2020
    Publication date: February 17, 2022
    Applicant: Caterpillar Inc.
    Inventors: Yung T. BUI, Srinivasa Perumal VELU
  • Patent number: 11247173
    Abstract: 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: Grant
    Filed: August 11, 2020
    Date of Patent: February 15, 2022
    Assignee: Caterpillar Inc.
    Inventors: Yung T. Bui, Srinivasa Perumal Velu
  • Patent number: 10766044
    Abstract: 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: Grant
    Filed: November 21, 2018
    Date of Patent: September 8, 2020
    Assignee: Caterpillar Inc.
    Inventors: Yong Yi, Samprati Vijay Shah, Ian Aguirre, Yung T. Bui, Arvind Jujare, Erin Reim, Anthony C. Rodman
  • Publication number: 20200224571
    Abstract: 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: Application
    Filed: January 16, 2019
    Publication date: July 16, 2020
    Applicant: Caterpillar Inc.
    Inventors: Samprati Vijay Shah, Satya Ramakrishna Manda Venkata Naga, Ian Aguirre, Arvind Jujare, Yung T. Bui, Phillip Kyle Orman, Yong Yi
  • Publication number: 20200156093
    Abstract: 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: Application
    Filed: November 21, 2018
    Publication date: May 21, 2020
    Applicant: Caterpillar Inc.
    Inventors: Yong Yi, Samprati Vijay Shah, Ian Aguirre, Yung T. Bui, Arvind Jujare, Erin Reim, Anthony C. Rodman
  • Patent number: 9976470
    Abstract: 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: Grant
    Filed: April 24, 2017
    Date of Patent: May 22, 2018
    Assignee: Caterpillar Inc.
    Inventors: Raymond U. Isada, Kurtis E. Chenoweth, Eric Spaeth, Ping Xiang, Yung T. Bui
  • Publication number: 20170241322
    Abstract: 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: Application
    Filed: April 24, 2017
    Publication date: August 24, 2017
    Inventors: Raymond U. Isada, Kurtis E. Chenoweth, Eric Spaeth, Ping Xiang, Yung T. Bui
  • Patent number: 9677447
    Abstract: 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: Grant
    Filed: December 5, 2014
    Date of Patent: June 13, 2017
    Assignee: Caterpillar Inc.
    Inventors: Raymond Upano Isada, Kurtis Edward Chenoweth, Eric Spaeth, Ping Xiang, Yung T. Bui
  • Publication number: 20170087514
    Abstract: 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: Application
    Filed: September 30, 2015
    Publication date: March 30, 2017
    Applicant: Caterpillar Inc.
    Inventors: Mohamed Daoud, Yung T. Bui, Arvind Jujare, Kevin Weiss
  • Publication number: 20160194995
    Abstract: 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: Application
    Filed: March 11, 2016
    Publication date: July 7, 2016
    Applicant: Caterpillar Inc.
    Inventors: Kevin Weiss, Mohamed I. Daoud, Yung T. Bui, Arvind Jujare, Chiranjeevi Mangamuri, Timothy Alcenius
  • Publication number: 20160160727
    Abstract: 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: Application
    Filed: December 5, 2014
    Publication date: June 9, 2016
    Applicant: CATERPILLAR INC.
    Inventors: Raymond Upano ISADA, Kurtis Edward CHENOWETH, Eric SPAETH, Ping XIANG, Yung T. BUI
  • Patent number: 9302223
    Abstract: 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: Grant
    Filed: June 13, 2014
    Date of Patent: April 5, 2016
    Assignee: Caterpillar Inc.
    Inventors: Yung T. Bui, Ping Xiang
  • Publication number: 20150360176
    Abstract: 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: Application
    Filed: June 13, 2014
    Publication date: December 17, 2015
    Inventors: Yung T. Bui, Ping Xiang
  • Patent number: 8999276
    Abstract: 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: Grant
    Filed: September 19, 2013
    Date of Patent: April 7, 2015
    Assignee: Caterpillar Inc.
    Inventor: Yung T. Bui
  • Publication number: 20150078976
    Abstract: 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: Application
    Filed: September 19, 2013
    Publication date: March 19, 2015
    Applicant: Caterpillar Inc.
    Inventor: Yung T. Bui
  • Patent number: 8752370
    Abstract: 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: Grant
    Filed: December 9, 2010
    Date of Patent: June 17, 2014
    Assignee: 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
  • Patent number: 8635861
    Abstract: 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: Grant
    Filed: September 14, 2010
    Date of Patent: January 28, 2014
    Assignee: Caterpillar Inc.
    Inventors: Jinhui Sun, Yung T. Bui, Michael P. Boahene, Shashank Mupparapu
  • Patent number: 8511075
    Abstract: 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: Grant
    Filed: September 19, 2008
    Date of Patent: August 20, 2013
    Assignee: Caterpillar Inc.
    Inventors: Cory Andrew Brown, Glenn Brian Cox, Yung T. Bui
  • Publication number: 20130152555
    Abstract: An injector configured to introduce a reductant into an exhaust stream, the injector includes: a body including a conduit with a first diameter, a nozzle fluidly coupled to the conduit and disposed at a distal end of the body, and an extension extending from the distal end of the body, the extension extending from the distal end of the body by at least a distance equal to the first diameter.
    Type: Application
    Filed: December 15, 2011
    Publication date: June 20, 2013
    Applicant: Caterpillar Inc.
    Inventors: Yung T. Bui, Arvind Jujare, Jay Venkataraghavan