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).
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Publication number: 20240068388Abstract: A diesel exhaust fluid (DEF) nozzle includes a first conduit, an outlet of the first conduit defining an inlet of a first mixing chamber; and a second conduit disposed around the first conduit, an outer surface of the first conduit and an inner surface of the second conduit defining a second flow path therebetween. A flow area of the second flow path decreases from an inlet of the second flow path to a throat, and increases from the throat to an outlet of the second flow path. The inner surface of the second conduit defines a peripheral wall of the first mixing chamber, and a peripheral wall of a second mixing chamber, the first flow path and the second flow path being in fluid communication with the second mixing chamber via the first mixing chamber.Type: ApplicationFiled: August 23, 2022Publication date: February 29, 2024Applicant: Caterpillar Inc.Inventors: Samuel S. Kumar, Anthony C. Rodman, Kelsey A. Unser, Ramakrishna Manda, Glen C. Martin
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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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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: 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: 9879581Abstract: 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: GrantFiled: March 25, 2016Date of Patent: January 30, 2018Assignee: Caterpillar Inc.Inventors: Anthony C. Rodman, J. Josh Driscoll, Bogdan Balea, Wade J. Robel
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Publication number: 20170276044Abstract: 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: ApplicationFiled: March 25, 2016Publication date: September 28, 2017Applicant: Caterpillar Inc.Inventors: Anthony C. Rodman, J. Josh Driscoll, Bogdan Balea, Wade J. Robel
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Publication number: 20170276053Abstract: 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: ApplicationFiled: September 20, 2016Publication date: September 28, 2017Applicant: Caterpillar Inc.Inventors: Wade J. Robel, Tom Paulson, Anthony C. Rodman, J. Josh Driscoll, Bogdan Balea
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Patent number: 9718037Abstract: 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: GrantFiled: December 17, 2014Date of Patent: August 1, 2017Assignee: Caterpillar Inc.Inventors: Aaron Harmon, Andrew M. Denis, Anthony C. Rodman, Eric P. Spaeth, Jayaraman K. Venkataraghavan, Raymond U. Isada, Yong Yi
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Publication number: 20160175784Abstract: 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: ApplicationFiled: December 17, 2014Publication date: June 23, 2016Applicant: Caterpillar Inc.Inventors: Aaron Harmon, Andrew M. Denis, Anthony C. Rodman, Eric P. Spaeth, Jayaraman K. Venkataraghavan, Raymond U. Isada, Yong Yi
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Patent number: 9062576Abstract: 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: GrantFiled: December 12, 2011Date of Patent: June 23, 2015Assignee: Caterpillar Inc.Inventors: Michael A. Snopko, Rajesh N. Nair, Frederic Fugere, Andrew A. Knitt, Anthony C. Rodman
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Patent number: 8942887Abstract: 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: GrantFiled: December 16, 2010Date of Patent: January 27, 2015Assignee: Caterpillar Inc.Inventors: Michael A. Snopko, Anthony C. Rodman, Rajesh Nair, Frederic Fugere, Andrew A. Knitt, Malshantha M. Kankanamge
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Patent number: 8833063Abstract: 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: GrantFiled: May 17, 2011Date of Patent: September 16, 2014Assignee: Caterpillar Inc.Inventors: Michael A. Snopko, Rajesh N. Nair, Anthony C. Rodman
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Patent number: 8776501Abstract: 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: GrantFiled: July 15, 2013Date of Patent: July 15, 2014Assignee: Perkins Engines Company LimitedInventors: Tom W. Carlill, Jason Soilleux, Alistair C. Farman, Guy Blundell, Anthony C. Rodman
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Patent number: 8631642Abstract: 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: GrantFiled: December 22, 2009Date of Patent: January 21, 2014Assignee: Perkins Engines Company LimitedInventors: Tom W. Carlill, Jason Soilleux, Alistair C. Farman, Guy Blundell, Anthony C. Rodman
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Publication number: 20130298530Abstract: 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: ApplicationFiled: July 15, 2013Publication date: November 14, 2013Inventors: Tom W. Carlill, Jason Soilleux, Alistair C. Farman, Guy Blundell, Anthony C. Rodman
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Patent number: 8336292Abstract: 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: GrantFiled: November 12, 2008Date of Patent: December 25, 2012Assignee: 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
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Publication number: 20120291419Abstract: 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: ApplicationFiled: May 17, 2011Publication date: November 22, 2012Applicant: CATERPILLAR INC.Inventors: Michael A. Snopko, Rajesh N. Nair, Anthony C. Rodman
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Publication number: 20120159930Abstract: 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: ApplicationFiled: December 12, 2011Publication date: June 28, 2012Applicant: CATERPILLAR INC.Inventors: Michael A. Snopko, Rajesh N. Nair, Frederic Fugere, Andrew A. Knitt, Anthony C. Rodman
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Publication number: 20120159929Abstract: 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: ApplicationFiled: December 9, 2011Publication date: June 28, 2012Applicant: CATERPILLAR INC.Inventors: Michael A. Snopko, Anthony C. Rodman, Rajesh N. Nair