Patents by Inventor David Todd Montgomery

David Todd Montgomery 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: 20220290641
    Abstract: A dual fuel system for an internal combustion engine includes a first fuel supply of a liquid pilot fuel, a primary fuel supply of a liquid primary fuel, and a dual fuel injector. The dual fuel injector includes a spill valve fluidly connected with a plunger cavity and movable to control a start of injection and an end of injection, and an admission valve. The admission valve is movable to admit a pilot fuel into the fuel injector, such that the pilot fuel is conveyed through an outlet check to form, within a primary fuel passage fluidly connected to the plunger cavity, a segmented fuel charge of leading pilot fuel and trailing primary fuel by displacing some of the primary fuel. The liquid pilot fuel may be a higher cetane/lower octane liquid fuel, and the primary fuel may be a lower cetane/higher octane liquid fuel.
    Type: Application
    Filed: June 3, 2022
    Publication date: September 15, 2022
    Applicant: Caterpillar Inc.
    Inventors: Eric Lee Schroeder, David Todd Montgomery, Dana Ray Coldren, Chad Koci
  • Patent number: 11415034
    Abstract: An aftertreatment system for treatment of exhaust gases exiting an engine includes a first Selective Catalytic Reduction (SCR) device in fluid communication with the engine. The first SCR device receives the exhaust gases exiting the engine for reducing a first quantity of oxides of nitrogen (NOx) present in the exhaust gases. The aftertreatment system also includes an oxidation catalyst in fluid communication with the first SCR device. The oxidation catalyst receives the exhaust gases exiting the first SCR device for oxidizing ammonia present in the exhaust gases into a second quantity of NOx. The aftertreatment system further includes a second SCR device in fluid communication with the oxidation catalyst. The second SCR device receives the exhaust gases exiting the oxidation catalyst for reducing the second quantity of NOx.
    Type: Grant
    Filed: November 23, 2020
    Date of Patent: August 16, 2022
    Assignee: Caterpillar Inc.
    Inventor: David Todd Montgomery
  • Publication number: 20220243691
    Abstract: A dual fuel system for an internal combustion engine includes a first fuel supply of a liquid pilot fuel, a primary fuel supply of a liquid primary fuel, and a dual fuel injector. The dual fuel injector includes a spill valve fluidly connected with a plunger cavity and movable to control a start of injection and an end of injection, and an admission valve. The admission valve is movable to admit a pilot fuel into the fuel injector, such that the pilot fuel is conveyed through an outlet check to form, within a primary fuel passage fluidly connected to the plunger cavity, a segmented fuel charge of leading pilot fuel and trailing primary fuel by displacing some of the primary fuel. The liquid pilot fuel may be a higher cetane/lower octane liquid fuel, and the primary fuel may be a lower cetane/higher octane liquid fuel.
    Type: Application
    Filed: February 4, 2021
    Publication date: August 4, 2022
    Applicant: Caterpillar Inc.
    Inventors: Eric Lee Schroeder, David Todd Montgomery, Dana Ray Coldren, Chad Koci
  • Patent number: 11384721
    Abstract: A dual fuel system for an internal combustion engine includes a first fuel supply of a liquid pilot fuel, a primary fuel supply of a liquid primary fuel, and a dual fuel injector. The dual fuel injector includes a spill valve fluidly connected with a plunger cavity and movable to control a start of injection and an end of injection, and an admission valve. The admission valve is movable to admit a pilot fuel into the fuel injector, such that the pilot fuel is conveyed through an outlet check to form, within a primary fuel passage fluidly connected to the plunger cavity, a segmented fuel charge of leading pilot fuel and trailing primary fuel by displacing some of the primary fuel. The liquid pilot fuel may be a higher cetane/lower octane liquid fuel, and the primary fuel may be a lower cetane/higher octane liquid fuel.
    Type: Grant
    Filed: February 4, 2021
    Date of Patent: July 12, 2022
    Assignee: Caterpillar Inc.
    Inventors: Eric Lee Schroeder, David Todd Montgomery, Dana Ray Coldren, Chad Koci
  • Patent number: 11384708
    Abstract: Operating an engine includes injecting a liquid alcohol fuel such as methanol into a stream of compressed intake air at an upstream injection location, and injecting the liquid fuel at a plurality of downstream injection locations into a plurality of streams of the compressed intake air from an intake manifold to combustion cylinders in the engine. A fueling control unit apportions a total injected quantity of the liquid fuel between the upstream injection location and the plurality of downstream injection locations based on a temperature parameter of the compressed intake air. The compressed intake air is combusted with the liquid fuel and a compression ignition pilot fuel in the plurality of combustion cylinders.
    Type: Grant
    Filed: June 23, 2021
    Date of Patent: July 12, 2022
    Assignee: Caterpillar Inc.
    Inventors: Eric Lee Schroeder, David Todd Montgomery, Arnold Myoungjin Kim, Michael Bardell, Nikolas Karl Landin, Kenth I. Svensson
  • Patent number: 11365712
    Abstract: A controller for a dedicated exhaust gas recirculation (D-EGR) engine is disclosed. The controller may receive a plurality of cylinder pressure signals, each of which is associated with a respective cylinder in a plurality of cylinders of the D-EGR engine. The plurality of cylinders includes at least one donor cylinder and a set of non-donor cylinders. The controller may receive a crankshaft angle signal associated with a crankshaft of the D-EGR engine. The controller may selectively adjust ignition timing of a cylinder, of the plurality of cylinders, based on the crankshaft angle signal and a cylinder pressure signal, of the plurality of cylinder pressure signals, associated with the cylinder; or a fuel rate of the at least one donor cylinder based on the crankshaft angle signal and a set of cylinder pressure signals, of the plurality of cylinder pressure signals, associated with the set of non-donor cylinders.
    Type: Grant
    Filed: November 12, 2020
    Date of Patent: June 21, 2022
    Assignee: Caterpillar Inc.
    Inventors: David Todd Montgomery, Greg Hampson
  • Publication number: 20220162971
    Abstract: An aftertreatment system for treatment of exhaust gases exiting an engine includes a first Selective Catalytic Reduction (SCR) device in fluid communication with the engine. The first SCR device receives the exhaust gases exiting the engine for reducing a first quantity of oxides of nitrogen (NOx) present in the exhaust gases. The aftertreatment system also includes an oxidation catalyst in fluid communication with the first SCR device. The oxidation catalyst receives the exhaust gases exiting the first SCR device for oxidizing ammonia present in the exhaust gases into a second quantity of NOx. The aftertreatment system further includes a second SCR device in fluid communication with the oxidation catalyst. The second SCR device receives the exhaust gases exiting the oxidation catalyst for reducing the second quantity of NOx.
    Type: Application
    Filed: November 23, 2020
    Publication date: May 26, 2022
    Applicant: Caterpillar Inc.
    Inventor: David Todd Montgomery
  • Publication number: 20210148323
    Abstract: A controller for a dedicated exhaust gas recirculation (D-EGR) engine is disclosed. The controller may receive a plurality of cylinder pressure signals, each of which is associated with a respective cylinder in a plurality of cylinders of the D-EGR engine. The plurality of cylinders includes at least one donor cylinder and a set of non-donor cylinders. The controller may receive a crankshaft angle signal associated with a crankshaft of the D-EGR engine. The controller may selectively adjust ignition timing of a cylinder, of the plurality of cylinders, based on the crankshaft angle signal and a cylinder pressure signal, of the plurality of cylinder pressure signals, associated with the cylinder; or a fuel rate of the at least one donor cylinder based on the crankshaft angle signal and a set of cylinder pressure signals, of the plurality of cylinder pressure signals, associated with the set of non-donor cylinders.
    Type: Application
    Filed: November 12, 2020
    Publication date: May 20, 2021
    Applicant: Caterpillar Inc.
    Inventors: David Todd MONTGOMERY, Greg HAMPSON
  • Publication number: 20200347754
    Abstract: A gas engine is disclosed. The gas engine may include a combustion cylinder. The combustion cylinder may include an intake with an intake valve. The combustion cylinder may include an exhaust with an exhaust valve. The gas engine may include a gas admission valve assembly coupled to the intake. The gas admission assembly may include a trimmable electro-hydraulically actuatable gas admission valve to control a gas flow into the intake.
    Type: Application
    Filed: May 2, 2019
    Publication date: November 5, 2020
    Applicant: Caterpillar Inc.
    Inventors: David Yu Zhang CHANG, David Todd MONTGOMERY, Scott FIVELAND, Scott F. SHAFER
  • Patent number: 10619594
    Abstract: A combustion system for an internal combustion engine includes a cylinder having a cylinder wall defining a bore, a piston disposed inside the bore, a combustion chamber delimited by a cylinder head, the cylinder wall, and the piston. The piston includes a piston bowl defining a floor portion, and at least one scooped recess extending radially outwardly from a periphery of the piston bowl. The internal combustion engine further includes a fuel injector configured to inject fuel into the combustion chamber as a plurality of fuel jets at a main injection timing such that each fuel jet contacts the floor portion of the piston bowl and follows a profile of the piston bowl and enter the at least one scooped recess. Furthermore, at least one of the plurality of is deflected by the at least one scooped recess away from the cylinder wall.
    Type: Grant
    Filed: March 31, 2017
    Date of Patent: April 14, 2020
    Assignee: Caterpillar Inc.
    Inventors: Bobby John, Jonathan W Anders, David Todd Montgomery, Kenth I Svensson
  • Patent number: 10456715
    Abstract: A seal arrangement for joining a first component to a second component is disclosed. The seal arrangement may have a first sealing surface formed as an integral portion of the first component, and a second sealing surface formed as an integral portion of the second component and configured to directly engage the first sealing surface. The seal arrangement may also have an energizer engaged with the first sealing surface and configured to inhibit movement of the first sealing surface away from the second sealing surface during a temperature drop.
    Type: Grant
    Filed: July 25, 2016
    Date of Patent: October 29, 2019
    Assignee: Caterpillar Inc.
    Inventors: Daniel Raymond Baldwin, David Todd Montgomery
  • Publication number: 20180283315
    Abstract: A combustion system for an internal combustion engine includes a cylinder having a cylinder wall defining a bore, a piston disposed inside the bore, a combustion chamber delimited by a cylinder head, the cylinder wall, and the piston. The piston includes a piston bowl defining a floor portion, and at least one scooped recess extending radially outwardly from a periphery of the piston bowl. The internal combustion engine further includes a fuel injector configured to inject fuel into the combustion chamber as a plurality of fuel jets at a main injection timing such that each fuel jet contacts the floor portion of the piston bowl and follows a profile of the piston bowl and enter the at least one scooped recess. Furthermore, at least one of the plurality of is deflected by the at least one scooped recess away from the cylinder wall.
    Type: Application
    Filed: March 31, 2017
    Publication date: October 4, 2018
    Applicant: Caterpillar Inc.
    Inventors: Bobby John, Jonathan W. Anders, David Todd Montgomery, Kenth I. Svensson
  • Publication number: 20180021703
    Abstract: A seal arrangement for joining a first component to a second component is disclosed. The seal arrangement may have a first sealing surface formed as an integral portion of the first component, and a second sealing surface formed as an integral portion of the second component and configured to directly engage the first sealing surface. The seal arrangement may also have an energizer engaged with the first sealing surface and configured to inhibit movement of the first sealing surface away from the second sealing surface during a temperature drop.
    Type: Application
    Filed: July 25, 2016
    Publication date: January 25, 2018
    Applicant: Caterpillar Inc.
    Inventors: Daniel Raymond BALDWIN, David Todd MONTGOMERY
  • Patent number: 9714624
    Abstract: An engine system is disclosed. The engine system may have an engine including at least one cylinder. Further, the engine system may have a nozzle configured to selectively inject gaseous fuel into the at least one cylinder of the engine. The engine system may also have an intake port configured to direct air for combustion to the at least one cylinder. In addition, the engine system may have exhaust valves associated with the at least one cylinder. The exhaust valves may be configured to direct exhaust from the cylinder to an atmosphere. The exhaust valves may also be configured to close at different times.
    Type: Grant
    Filed: April 3, 2015
    Date of Patent: July 25, 2017
    Assignee: Electro-Motive Diesel, Inc.
    Inventors: Deep Bandyopadhyay, John P. Timmons, David Todd Montgomery, Aaron Gamache Foege
  • Publication number: 20160290243
    Abstract: An engine system is disclosed. The engine system may have an engine including at least one cylinder. Further, the engine system may have a nozzle configured to selectively inject gaseous fuel into the at least one cylinder of the engine. The engine system may also have an intake port configured to direct air for combustion to the at least one cylinder. In addition, the engine system may have exhaust valves associated with the at least one cylinder. The exhaust valves may be configured to direct exhaust from the cylinder to an atmosphere. The exhaust valves may also be configured to close at different times.
    Type: Application
    Filed: April 3, 2015
    Publication date: October 6, 2016
    Applicant: ELECTRO-MOTIVE DIESEL, INC.
    Inventors: Deep BANDYOPADHYAY, John P. TIMMONS, David Todd MONTGOMERY, Aaron Gamache FOEGE
  • Publication number: 20140156169
    Abstract: A control system for fuel delivery systems associated with cylinders of a multi-cylinder engine is provided. The control system includes a detector, a processor, and an actuator. The detector is configured to sense a signal to change from a compression ignited fuel to a spark ignited fuel in a pre-determined number of cylinders. The processor is configured to receive the signal from the detector and generate one or more actuation signals. The controller is configured to receive the actuation signals and tandemly control the fuel delivery systems associated with the pre-determined cylinders based on the actuation signals.
    Type: Application
    Filed: December 3, 2012
    Publication date: June 5, 2014
    Applicant: Electro-Motive Diesel Inc.
    Inventors: Aaron Foege, David Todd Montgomery, Farhan Devani, Scott B. Fiveland
  • Publication number: 20120042639
    Abstract: A power system is provided having a first power source including at least one engine configured to combust a first air/fuel mixture and produce a first exhaust stream. The fuel of the first air/fuel mixture may be liquefied petroleum gas. The system also has a first exhaust passageway fluidly connected to the first power source and configured to receive the first exhaust stream. In addition, the system has a second power source including at least one engine configured to combust a second fuel/air mixture and produce a second exhaust stream. Furthermore, the system has a second exhaust passageway fluidly connected to the second power source and configured to receive the second exhaust stream.
    Type: Application
    Filed: October 28, 2011
    Publication date: February 23, 2012
    Inventors: David Todd Montgomery, Weidong Gong, Wade J. Robel, James Joshua Driscoll
  • Publication number: 20090320814
    Abstract: A system is disclosed for controlling a combustion engine. The system includes a measurement apparatus disposed external to a combustion chamber of the engine. A device is configured to selectively direct an amount of air and fuel to the measurement apparatus. An ignition source is configured to ignite the air and fuel to produce a flame propagating within the measurement apparatus. A sensor is configured to measure at least one parameter associated with the flame propagating within the measurement apparatus. A controller is configured to determine a flame speed within the measurement apparatus based on the at least one measured parameter, and to control an operating flame speed in the engine by managing an air/fuel ratio of the engine based on the determined flame speed.
    Type: Application
    Filed: June 27, 2008
    Publication date: December 31, 2009
    Inventors: Scott Byron Fiveland, Martin Leo Willi, David Todd Montgomery
  • Publication number: 20080302093
    Abstract: A power system is provided having a first power source including at least one engine configured to combust a first air/fuel mixture and produce a first exhaust stream. The fuel of the first air/fuel mixture may be liquefied petroleum gas. The system also has a first exhaust passageway fluidly connected to the first power source and configured to receive the first exhaust stream. In addition, the system has a second power source including at least one engine configured to combust a second fuel/air mixture and produce a second exhaust stream. Furthermore, the system has a second exhaust passageway fluidly connected to the second power source and configured to receive the second exhaust stream.
    Type: Application
    Filed: May 30, 2008
    Publication date: December 11, 2008
    Inventors: David Todd Montgomery, Weidong Gong, Wade J. Robel, James Joshua Driscoll