Patents Assigned to Caterpillar Inc
  • Patent number: 11008915
    Abstract: A diesel exhaust fluid (DEF) system and a method of controlling the DEF system are disclosed. The method may include determining that a shutdown condition of the DEF system is satisfied; providing a control signal to open a valve of a buffer tank of the DEF system based on determining that the shutdown condition of the DEF system is satisfied; determining that a level of DEF remaining in the buffer tank satisfies a threshold; and closing the valve of the buffer tank based on the level of DEF remaining in the buffer tank satisfying the threshold.
    Type: Grant
    Filed: March 20, 2019
    Date of Patent: May 18, 2021
    Assignee: Caterpillar Inc.
    Inventors: Kurtis Chenoweth, Jason Hudgens, Xiaohui Gong, Shivsinh Parmar
  • Patent number: 11008957
    Abstract: A fuel system for an internal combustion engine includes a nozzle, a fuel pump, a spill valve assembly, and a pumping control unit. The spill valve assembly includes a first spill valve and a second spill valve fluidly in parallel between a plunger cavity in the fuel pump and a low pressure space. A pumping control unit commands closing of the first spill valve and then the second spill valve to adjust the spill valve assembly to start pressurization in the fuel pump, and commands opening the first spill valve to end pressurization in the fuel pump. A pumping duration is determined based on a timing of the commanded closing of the second spill valve and a timing of the commanded opening of the first spill valve.
    Type: Grant
    Filed: June 5, 2019
    Date of Patent: May 18, 2021
    Assignee: Caterpillar Inc.
    Inventors: Dana Coldren, Sana Mahmood
  • Publication number: 20210140148
    Abstract: An adaptor includes a body defining a longitudinal axis, and a transverse axis that is normal to the longitudinal axis. The body also has a leading portion defining a lock receiving recess extending transversely at least partially through the leading portion, and a wire receiving conduit that is in communication with the lock receiving recess. The lock receiving recess defines a width and a depth with a ratio of the depth to width is greater than 1.0.
    Type: Application
    Filed: November 8, 2019
    Publication date: May 13, 2021
    Applicant: Caterpillar Inc.
    Inventor: Douglas C. Serrurier
  • Publication number: 20210138371
    Abstract: A filter pulsation dampening device has a replaceable filter element including a plurality of baffles disposed next to each other or a flexible valve that is disposed proximate a baffle.
    Type: Application
    Filed: November 13, 2019
    Publication date: May 13, 2021
    Applicant: Caterpillar Inc.
    Inventors: Jeffrey R. Ries, Jon T Immel, Javier A Rodriguez
  • Publication number: 20210139092
    Abstract: A track roller includes a body having an annular configuration defining an axis of rotation, a radial direction, and a circumferential direction disposed about the axis of rotation. The body also defines a thru-hole extending axially through the body that is centered on the axis of rotation. A blind void is disposed annularly about the axis of rotation, the blind void being spaced radially away from the thru-hole a predetermined minimum distance, forming a cantilever portion defining a flex point and a flex radial distance measured radially from the flex point to the thru-hole.
    Type: Application
    Filed: November 12, 2019
    Publication date: May 13, 2021
    Applicant: Caterpillar Inc.
    Inventor: David J. Hakes
  • Publication number: 20210138370
    Abstract: A filter pulsation dampening device has a replaceable filter element including a plurality of baffles disposed next to each other or a flexible valve that is disposed proximate a baffle.
    Type: Application
    Filed: November 13, 2019
    Publication date: May 13, 2021
    Applicant: Caterpillar Inc.
    Inventors: Jeffrey R. Ries, Jon T. Immel, Javier A. Rodriguez
  • Publication number: 20210140386
    Abstract: A fuel injection method includes applying a first method current to close a spill valve according to a first method, applying a control valve current to open a control valve, and discontinuing the application of the control valve current to thereby cause the control valve to close. The method also includes applying a second method current to maintain the spill valve closed according to a second method and detecting a timing of a closing of the control valve while applying the second method current according to the second method, the second method being different than the first method.
    Type: Application
    Filed: November 11, 2019
    Publication date: May 13, 2021
    Applicant: Caterpillar Inc.
    Inventors: Daniel R. PUCKETT, Kranti K. NELLUTLA, Gregory L. ARMSTRONG
  • Publication number: 20210138569
    Abstract: A method for manufacturing a T-shaped structure includes depositing one or more layers of weld beads over a portion of a surface of a first component such that the one or more layers of weld beads develop a metallurgical bond with the portion. Also, the method includes placing an end of a second component over the one or more layers of weld beads such that the end develops a metallurgical bond with the one or more layers of weld beads. The one or more layers of weld beads define a fully penetrated weld joint between the end and the portion to form the T-shaped structure.
    Type: Application
    Filed: November 12, 2019
    Publication date: May 13, 2021
    Applicant: Caterpillar Inc.
    Inventor: Thierry Marchione
  • Publication number: 20210140149
    Abstract: A power locking device has a body including a blind bore with an electroactive polymer disposed in the blind bore, and a sliding lock member that is disposed in the blind bore and that contacts the electroactive polymer. A current source is in electrical communication with the electroactive polymer.
    Type: Application
    Filed: November 11, 2019
    Publication date: May 13, 2021
    Applicant: Caterpillar Inc.
    Inventor: Douglas C. Serrurier
  • Patent number: 11002233
    Abstract: An internal combustion engine system includes an engine head, a pressurized fuel supply conduit, and a fuel return conduit. Fuel injectors are positioned in fuel injector bores in the engine head, and each include an intensifier plunger, a nozzle check, an injection control valve, and an intensifier control valve. Fuel recovery fittings are coupled to the plurality of fuel injectors and each fluidly connect an actuation fuel outlet in one of the fuel injectors to the fuel return conduit.
    Type: Grant
    Filed: November 29, 2019
    Date of Patent: May 11, 2021
    Assignee: Caterpillar Inc.
    Inventors: Goudarz Hajialimohammadi, Manjunath Bannur Nagaraja
  • Patent number: 11002177
    Abstract: An internal combustion engine includes low and high pressure turbochargers connected in series. An engine cylinder has an intake valve that fluidly connects a main chamber of the engine cylinder with an outlet of the high pressure compressor through an intake passage. An exhaust gas recirculation passage is fluidly interconnected between exhaust and intake conduits. A pre-chamber encloses a spark plug and is fluidly open with the main chamber of the engine cylinder. A first fluid path extends from the intake passage directly to the pre-chamber, and a second fluid path extends from the intermediate passage directly to the pre-chamber.
    Type: Grant
    Filed: November 15, 2018
    Date of Patent: May 11, 2021
    Assignee: Caterpillar Inc.
    Inventors: Jaswinder Singh, Martin L. Willi, Patrick J. Seiler, Michael Bardell
  • Patent number: 11000789
    Abstract: A filter element may include a tubular element, first and second end caps, each associated with an opposite end of the tubular element, filter media positioned around the tubular element and between the first and second end caps, a biasing element associated with the tubular element, and a retainer element positioned at a first end of the tubular element. The retainer element may include a retainer aperture including a central circular portion and two opposite lateral slots extending from opposite sides of the central circular portion, and two arcuate shoulder segments extending between opposite sides of the two opposite lateral slots.
    Type: Grant
    Filed: May 21, 2019
    Date of Patent: May 11, 2021
    Assignee: Caterpillar Inc.
    Inventors: Bryant Alan Morris, Jeffrey R. Ries, Timothy J. Bennett
  • Patent number: 11002176
    Abstract: Fluid temperature regulator includes a unitarily-formed housing having an inlet, outlet, bypass outlet, and plurality of valve chamber openings, in line with respective valve chambers. Valve holders are removably disposed within valve chamber openings to position thermostatic valves within the valve chambers. Each valve holder includes at least one wall having at least one holder outlet opening and holder bypass outlet opening. First and second regulator flowpaths through the regulator are defined through the regulator inlet to either the regulator bypass outlet or regulator outlet depending upon whether the thermostatic valves are disposed in a first or second configuration, respectively.
    Type: Grant
    Filed: June 1, 2018
    Date of Patent: May 11, 2021
    Assignee: Caterpillar Inc.
    Inventors: Douglas E. Davis, Mark W. Meyer, Brad Patera
  • Patent number: 11001991
    Abstract: A method for loading a payload carrier of a machine includes receiving, from a camera on the machine, a two-dimensional image of an interior of the payload carrier as material is loaded into the payload carrier. The method further includes filtering the image to identify a contour of the loaded material and determining an area of the contour. The method further includes controlling a display device indicate the determined area.
    Type: Grant
    Filed: January 11, 2019
    Date of Patent: May 11, 2021
    Assignee: Caterpillar Inc.
    Inventors: Christopher Ha, Shawn Nainan Mathew, Yang Liu, Qi Wang
  • Patent number: 11002160
    Abstract: A cam follower assembly includes a cam roller, and a generally cylindrical body having an outer peripheral surface configured to be reciprocally slidable within a bore of an engine component. The cam roller is rotatably mounted on the body and configured to engage with a cam lobe on a camshaft of the engine. The cam lobe is operative to drive the body to a position at which the cam follower assembly causes one of opening of a valve or actuation of a fuel injector of the engine. A groove is formed in the body inset from the outer peripheral surface and extending axially along the outer peripheral surface parallel to the longitudinal axis of the body and aligned with an axial median plane of the cam roller and the cam lobe.
    Type: Grant
    Filed: August 22, 2019
    Date of Patent: May 11, 2021
    Assignee: Caterpillar Inc.
    Inventors: Ashwin A. Hattiangadi, John Stephen Pipis, Jr., Charles Francis Coffey, Kevin Duane Yoder, Vaibhav Balaji
  • Patent number: 11001989
    Abstract: A hydraulic system controller is disclosed. The hydraulic system controller may determine a maximum active circuit pressure of a set of active hydraulic circuits of the hydraulic system, wherein the hydraulic system includes a hydraulic pump to cause fluid to flow throughout the set of active hydraulic circuits; determine a circuit pressure of a hydraulic circuit of the hydraulic system; determine, based on a hydraulic flow command for the hydraulic circuit and the circuit pressure, a desired circuit delta-pressure for the hydraulic circuit; determine, based on the desired circuit delta-pressure and a pressure difference between the maximum active circuit pressure and the circuit pressure, a circuit valve setting for a circuit valve of the hydraulic circuit; and cause a control device to set a position of the circuit valve according to the circuit valve setting.
    Type: Grant
    Filed: March 30, 2020
    Date of Patent: May 11, 2021
    Assignee: Caterpillar Inc.
    Inventors: Rustin Glenn Metzger, Corey Lee Gorman, Adam Martin Nackers
  • Patent number: 11002205
    Abstract: A regeneration control system for an oxidation catalyst in an internal combustion engine includes a temperature sensor to produce a temperature signal indicative of an exhaust inlet temperature that is below a regeneration temperature for accumulated hydrocarbons on the oxidation catalyst, an electrically actuated boost leakage valve, and a regeneration control unit. The regeneration control unit commands an adjustment to the position of the electrically actuated boost leakage valve to increase leaked boost to increase exhaust temperature to the regeneration temperature by way of increased air-fuel ratio. Related methodology is disclosed.
    Type: Grant
    Filed: July 22, 2019
    Date of Patent: May 11, 2021
    Assignee: Caterpillar Inc.
    Inventors: Ryan Kominkiewicz, Brock Davis, James Mutti
  • Patent number: 11002219
    Abstract: A spark plug includes a body of revolution defining a longitudinal axis. The body has a forward axial portion with external threads, and an intermediate axial collar portion defining an axially downwardly facing sealing surface. A first electrode and a second electrode extend from the forward axial portion and define a spark gap therebetween. A hex drive portion is disposed axially above the intermediate collar portion. A gasket crush limiter includes a wall that extends axially downwardly from the intermediate axial collar portion, defining an annular pocket formed by the wall and the forward axial portion.
    Type: Grant
    Filed: May 4, 2020
    Date of Patent: May 11, 2021
    Assignee: Caterpillar Inc.
    Inventor: James Jay Cress
  • Patent number: 11002216
    Abstract: An engine includes a cylinder liner and a piston movable within the cylinder liner, a crevice formed between a top land of the piston and the cylinder liner, and an oil entry clearance formed between a top ring of the piston and the cylinder liner. The engine also includes an abnormal combustion inhibitor having an oil recapture surface exposed to the crevice and oriented to limit migration of oil from the crevice toward a combustion chamber in the engine. The abnormal combustion inhibitor includes a groove structure having as a substrate at least one of the cylinder liner or the piston. Related methodology is also disclosed.
    Type: Grant
    Filed: February 28, 2020
    Date of Patent: May 11, 2021
    Assignee: Caterpillar Inc.
    Inventors: Jaswinder Singh, Kenth I. Svensson
  • Patent number: D918819
    Type: Grant
    Filed: August 1, 2019
    Date of Patent: May 11, 2021
    Assignee: Caterpillar Inc.
    Inventors: Ashay Shetty, Ramoji Ravuri