Patents by Inventor Anthony C. Rodman

Anthony C. Rodman 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
  • 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: 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: 9879581
    Abstract: An after-treatment system includes, in series along an exhaust gas flow direction through the after-treatment system: a diesel oxidation catalyst (DOC), a diesel exhaust fluid (DEF) delivery device, a soot-reducing device and a selective catalytic reduction (SCR) catalyst.
    Type: Grant
    Filed: March 25, 2016
    Date of Patent: January 30, 2018
    Assignee: Caterpillar Inc.
    Inventors: Anthony C. Rodman, J. Josh Driscoll, Bogdan Balea, Wade J. Robel
  • Publication number: 20170276053
    Abstract: An after-treatment system includes, in series along an exhaust gas flow direction through the after-treatment system: a diesel oxidation catalyst (DOC) or a passive NOx adsorber (PNA), a diesel exhaust fluid (DEF) delivery device, a soot-reducing device and a selective catalytic reduction (SCR) catalyst, which may also include an additional PNA.
    Type: Application
    Filed: September 20, 2016
    Publication date: September 28, 2017
    Applicant: Caterpillar Inc.
    Inventors: Wade J. Robel, Tom Paulson, Anthony C. Rodman, J. Josh Driscoll, Bogdan Balea
  • Publication number: 20170276044
    Abstract: An after-treatment system includes, in series along an exhaust gas flow direction through the after-treatment system: a diesel oxidation catalyst (DOC), a diesel exhaust fluid (DEF) delivery device, a soot-reducing device and a selective catalytic reduction (SCR) catalyst.
    Type: Application
    Filed: March 25, 2016
    Publication date: September 28, 2017
    Applicant: Caterpillar Inc.
    Inventors: Anthony C. Rodman, J. Josh Driscoll, Bogdan Balea, Wade J. Robel
  • Patent number: 9718037
    Abstract: A mixing system for an aftertreatment system is disclosed. The mixing system includes a mixing tube. The mixing tube is provided in fluid communication with an exhaust conduit. The mixing system also includes a reductant injector positioned at an injection location on the mixing tube. The mixing system further includes a mixer assembly positioned downstream of the injection location. The mixer assembly includes a plurality of mixing elements provided in a series arrangement, such that each of the plurality of mixing elements is provided downstream of one another.
    Type: Grant
    Filed: December 17, 2014
    Date of Patent: August 1, 2017
    Assignee: Caterpillar Inc.
    Inventors: Aaron Harmon, Andrew M. Denis, Anthony C. Rodman, Eric P. Spaeth, Jayaraman K. Venkataraghavan, Raymond U. Isada, Yong Yi
  • Publication number: 20160175784
    Abstract: A mixing system for an aftertreatment system is disclosed. The mixing system includes a mixing tube. The mixing tube is provided in fluid communication with an exhaust conduit. The mixing system also includes a reductant injector positioned at an injection location on the mixing tube. The mixing system further includes a mixer assembly positioned downstream of the injection location. The mixer assembly includes a plurality of mixing elements provided in a series arrangement, such that each of the plurality of mixing elements is provided downstream of one another.
    Type: Application
    Filed: December 17, 2014
    Publication date: June 23, 2016
    Applicant: Caterpillar Inc.
    Inventors: Aaron Harmon, Andrew M. Denis, Anthony C. Rodman, Eric P. Spaeth, Jayaraman K. Venkataraghavan, Raymond U. Isada, Yong Yi
  • Patent number: 9062576
    Abstract: Operating an exhaust particulate filter system for an internal combustion engine includes transmitting electromagnetic energy, for example having a frequency above about 2 GHz, through an exhaust particulate filter containing trapped soot. The transmitted electromagnetic energy may be attenuated in response to the trapped soot, and a filter soot loading value calculated based at least in part upon a correlation among an attenuation of the electromagnetic energy, a temperature of the filter, and a mass of the trapped soot. An algorithm based upon a partial derivative of an equation representing the correlation may be used in calculating the filter soot loading value, and a resulting soot mass. The calculated soot mass is used to determine a relative soot loading state of the filter in conjunction with information as to ash loading. Responsive to determining the relative soot loading state satisfies regeneration suitability conditions, a regeneration initiation command may be outputted.
    Type: Grant
    Filed: December 12, 2011
    Date of Patent: June 23, 2015
    Assignee: Caterpillar Inc.
    Inventors: Michael A. Snopko, Rajesh N. Nair, Frederic Fugere, Andrew A. Knitt, Anthony C. Rodman
  • Patent number: 8942887
    Abstract: A machine includes an internal combustion engine, and an exhaust particulate filter system coupled therewith having an exhaust particulate filter for trapping particulates in exhaust from the internal combustion engine. A control system for the exhaust particulate filter includes a sensing mechanism such as an RF soot sensor and a data processor coupled with the sensing mechanism and configured to output a moisture compensation signal responsive to a pattern of inputs from the sensing mechanism indicative of moisture within the exhaust particulate filter, for controlling regeneration thereof.
    Type: Grant
    Filed: December 16, 2010
    Date of Patent: January 27, 2015
    Assignee: Caterpillar Inc.
    Inventors: Michael A. Snopko, Anthony C. Rodman, Rajesh Nair, Frederic Fugere, Andrew A. Knitt, Malshantha M. Kankanamge
  • Patent number: 8833063
    Abstract: A method of detecting ash in an exhaust particulate filter system for an internal combustion engine includes transmitting electromagnetic energy through an exhaust particulate filter containing soot and ash, and sensing a strength of the transmitted electromagnetic energy after having been attenuated in response to the soot. The method further includes electronically storing a filter monitoring history responsive to a difference between the transmitted strength and the sensed strength of the electromagnetic energy, and detecting an amount of the ash based at least in part upon a pattern of electromagnetic energy attenuation defined by the stored filter monitoring history. An exhaust particulate filter system for implementing related methodology includes a microprocessor configured to determine a value indicative of an amount of ash contained within an exhaust particulate filter responsive to a pattern of electromagnetic energy attenuation defined by a stored filter monitoring history.
    Type: Grant
    Filed: May 17, 2011
    Date of Patent: September 16, 2014
    Assignee: Caterpillar Inc.
    Inventors: Michael A. Snopko, Rajesh N. Nair, Anthony C. Rodman
  • Patent number: 8776501
    Abstract: A power system comprising an engine that produces exhaust, a fuel system that injects a fuel into the engine, an aftertreatment system that treats the exhaust, and is controller. The aftertreatment system includes an oxidation catalyst that converts NO from the engine into NO2, a particulate filter that traps soot from the engine, and a sensor that provides an indication of the amount of soot in the particulate filter. The controller increases an engine fuel injection pressure when the amount of soot in the particulate filter is above a threshold.
    Type: Grant
    Filed: July 15, 2013
    Date of Patent: July 15, 2014
    Assignee: Perkins Engines Company Limited
    Inventors: Tom W. Carlill, Jason Soilleux, Alistair C. Farman, Guy Blundell, Anthony C. Rodman
  • Patent number: 8631642
    Abstract: A power system comprising an engine that produces exhaust, a fuel system that injects a fuel into the engine, an aftertreatment system that treats the exhaust, and a controller. The aftertreatment system includes an oxidation catalyst that converts NO from the engine into NO2, a particulate filter that traps soot from the engine, and a sensor that provides an indication of the amount of soot in the particulate filter. The controller increases an engine fuel injection pressure when the amount of soot in the particulate filter is above a threshold.
    Type: Grant
    Filed: December 22, 2009
    Date of Patent: January 21, 2014
    Assignee: Perkins Engines Company Limited
    Inventors: Tom W. Carlill, Jason Soilleux, Alistair C. Farman, Guy Blundell, Anthony C. Rodman
  • Publication number: 20130298530
    Abstract: A power system comprising an engine that produces exhaust, a fuel system that injects a fuel into the engine, an aftertreatment system that treats the exhaust, and is controller. The aftertreatment system includes an oxidation catalyst that converts NO from the engine into NO2, a particulate filter that traps soot from the engine, and a sensor that provides an indication of the amount of soot in the particulate filter. The controller increases an engine fuel injection pressure when the amount of soot in the particulate filter is above a threshold.
    Type: Application
    Filed: July 15, 2013
    Publication date: November 14, 2013
    Inventors: Tom W. Carlill, Jason Soilleux, Alistair C. Farman, Guy Blundell, Anthony C. Rodman
  • Patent number: 8336292
    Abstract: An exhaust component for use with a combustion engine is disclosed. The exhaust component may have a housing at least partially defining an inlet and an outlet, and a treatment device supported by the housing in communication with exhaust passing from the inlet to the outlet. The exhaust component may also have a life indicator permanently associated with at least one of the housing and the treatment device.
    Type: Grant
    Filed: November 12, 2008
    Date of Patent: December 25, 2012
    Assignee: Caterpillar Inc.
    Inventors: Jason K. Bloms, Mohamed Daoud, Antony J. Eager, Kevin D. Ehrenhardt, Tazio S. Grivetti, David J. Kapparos, Matthew E. Leustek, Anthony C. Rodman, Richard Severns, II, Yanchai Zhang
  • Publication number: 20120291419
    Abstract: A method of detecting ash in an exhaust particulate filter system for an internal combustion engine includes transmitting electromagnetic energy through an exhaust particulate filter containing soot and ash, and sensing a strength of the transmitted electromagnetic energy after having been attenuated in response to the soot. The method further includes electronically storing a filter monitoring history responsive to a difference between the transmitted strength and the sensed strength of the electromagnetic energy, and detecting an amount of the ash based at least in part upon a pattern of electromagnetic energy attenuation defined by the stored filter monitoring history. An exhaust particulate filter system for implementing related methodology includes a microprocessor configured to determine a value indicative of an amount of ash contained within an exhaust particulate filter responsive to a pattern of electromagnetic energy attenuation defined by a stored filter monitoring history.
    Type: Application
    Filed: May 17, 2011
    Publication date: November 22, 2012
    Applicant: CATERPILLAR INC.
    Inventors: Michael A. Snopko, Rajesh N. Nair, Anthony C. Rodman
  • Publication number: 20120159929
    Abstract: A method of operating an exhaust particulate filter system for an internal combustion engine includes transmitting electromagnetic energy, for example having a frequency above about 2 GHz through an exhaust particulate filter containing trapped soot. The transmitted electromagnetic energy may be attenuated in response to the trapped soot, and a filter soot loading value calculated based at least in part upon a correlation among an attenuation of the electromagnetic energy, a temperature of the filter, and a mass of the trapped soot. An algorithm based upon a partial derivative of an equation representing the correlation may be used in calculating the filter soot loading value, and a resulting soot mass. Responsive to determining the calculated soot mass satisfies regeneration suitability conditions, a regeneration initiation command may be outputted.
    Type: Application
    Filed: December 9, 2011
    Publication date: June 28, 2012
    Applicant: CATERPILLAR INC.
    Inventors: Michael A. Snopko, Anthony C. Rodman, Rajesh N. Nair
  • Publication number: 20120159930
    Abstract: A method of operating an exhaust particulate filter system for an internal combustion engine includes transmitting electromagnetic energy, for example having a frequency above about 2 GHz, through an exhaust particulate filter containing trapped soot. The transmitted electromagnetic energy may be attenuated in response to the trapped soot, and a filter soot loading value calculated based at least in part upon a correlation among an attenuation of the electromagnetic energy, a temperature of the filter, and a mass of the trapped soot. An algorithm based upon a partial derivative of an equation representing the correlation may be used in calculating the filter soot loading value, and a resulting soot mass. The calculated soot mass is used to determine a relative soot loading state of the filter in conjunction with information as to ash loading. Responsive to determining the relative soot loading state satisfies regeneration suitability conditions, a regeneration initiation command may be outputted.
    Type: Application
    Filed: December 12, 2011
    Publication date: June 28, 2012
    Applicant: CATERPILLAR INC.
    Inventors: Michael A. Snopko, Rajesh N. Nair, Frederic Fugere, Andrew A. Knitt, Anthony C. Rodman
  • Publication number: 20120158242
    Abstract: A machine includes an internal combustion engine, and an exhaust particulate filter system coupled therewith having an exhaust particulate filter for trapping particulates in exhaust from the internal combustion engine. A control system for the exhaust particulate filter includes a sensing mechanism such as an RF soot sensor and a data processor coupled with the sensing mechanism and configured to output a moisture compensation signal responsive to a pattern of inputs from the sensing mechanism indicative of moisture within the exhaust particulate filter, for controlling regeneration thereof.
    Type: Application
    Filed: December 16, 2010
    Publication date: June 21, 2012
    Applicant: CATERPILLAR INC.
    Inventors: Michael A. Snopko, Anthony C. Rodman, Rajesh N. Nair, Frederic Fugere, Andrew A. Knitt, Malshantha M. Kankanamge
  • Patent number: 8062169
    Abstract: A method and apparatus are disclosed for controlling a hybrid energy system including a method of storing energy within a hybrid energy system. The hybrid energy system includes a traction load and a first energy consuming system configured to maintain a first criteria within a first operating range. The method includes receiving energy into the hybrid energy system from the traction load and distributing a first energy to the first energy consuming system when the first criteria is within the first operating range.
    Type: Grant
    Filed: April 30, 2007
    Date of Patent: November 22, 2011
    Assignee: Caterpillar Inc.
    Inventors: Jerry D. Marr, Benjamin A. Treichel, Anthony C. Rodman