Patents by Inventor Dana R. Coldren

Dana R. Coldren 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).

  • Patent number: 10247122
    Abstract: An engine control system is structured for operating a turbocharged engine system and includes an electronic control unit. The electronic control unit is structured to switch the engine system from operation in a parasitically loaded mode where fuel pressurized by a fuel pump is dumped to a low pressure space, to operation in a second mode, where an engine load increase is detected. Turbocharger lag in the engine system is limited during increasing the engine load by way of exhaust energy produced in response to the parasitic loading. Related methodology is disclosed.
    Type: Grant
    Filed: January 10, 2018
    Date of Patent: April 2, 2019
    Assignee: Caterpillar Inc.
    Inventors: Dana R Coldren, Ryan Thomas Sunley, Jianhua Zhang, Lifeng Wang
  • Patent number: 10190556
    Abstract: A cryogenic LNG fuel system is provided that includes a tank for storing LNG and a LNG fill system including a LNG inlet passage for directing a flow of LNG into the tank. A cryogenic pump is in fluid communication with the tank and includes a pumping element at least partially immersed in the LNG for directing the LNG out of the tank and a seal. A lubricant system is provided that includes a lubricant reservoir and a lubricant inlet passage in communication with the lubricant reservoir and the LNG inlet passage. The lubricant system is adapted to introduce the lubricant into the flow of LNG in the LNG inlet passage such that at least a portion of the lubricant is entrained in the LNG in the LNG inlet passage and carried into the tank.
    Type: Grant
    Filed: January 9, 2017
    Date of Patent: January 29, 2019
    Assignee: Caterpillar Inc.
    Inventors: Joshua T. Perko, Dana R. Coldren, Glenn B. Cox
  • Publication number: 20180347560
    Abstract: A pushrod assembly 5 may include a seal carrier 50 for a spaced seal assembly 60 and/or a seal carrier 70 for a stacked seal assembly 74, the spaced seal assembly including first and second annular seals 61, 62 separated by a spacer 63 to isolate between the seals a vented region 28 of the pushrod housing 6, the stacked seal assembly including at least two annular seals 80 stacked on the seal carrier. Each seal assembly can be removed and replaced via an access end 52, 72 of the seal carrier after detaching the access end from an adjacent component of the assembly. The seal carriers may be incorporated into a cryogenic pump 2 wherein at least one annular seal is arranged on each seal carrier to seal the pushrod assembly 5 within its housing 6.
    Type: Application
    Filed: May 31, 2017
    Publication date: December 6, 2018
    Inventors: Alan Stockner, Aaron M. Brown, Sridhar Thangaswamy, Dana R. Coldren, Dennis Gibson
  • Patent number: 10060421
    Abstract: A cryogenic fluid pump includes a plurality of pumping elements, each of the plurality of pumping elements having an actuator portion that is associated with and configured to selectively activate one end of a pushrod in response to a command by an electronic controller, an activation portion associated with an opposite end of the pushrod, and a pumping portion associated with the activation portion. For each of the plurality of pumping elements, the pumping portion is activated for pumping a fluid by the activation portion, which activation portion is activated by the actuator portion. The electronic controller is configured to selectively activate each of the plurality of pumping elements such that a flow of fluid from the cryogenic fluid pump results from continuous activations of the plurality of pumping elements at selected dwell times between activations of successive pumping elements.
    Type: Grant
    Filed: June 29, 2015
    Date of Patent: August 28, 2018
    Assignee: Caterpillar Inc.
    Inventors: Cory A. Brown, Adrienne M. Brasche, Sunil J. Bean, Shivangini S. Hazari, Sana Mahmood, Nikhil M. Arya, Joshua W. Steffen, Daniel R. Baldwin, Dana R. Coldren, Robert M. Campion, Alan R. Stockner
  • Publication number: 20180195479
    Abstract: A cryogenic LNG fuel system is provided that includes a tank for storing LNG and a LNG fill system including a LNG inlet passage for directing a flow of LNG into the tank. A cryogenic pump is in fluid communication with the tank and includes a pumping element at least partially immersed in the LNG for directing the LNG out of the tank and a seal. A lubricant system is provided that includes a lubricant reservoir and a lubricant inlet passage in communication with the lubricant reservoir and the LNG inlet passage. The lubricant system is adapted to introduce the lubricant into the flow of LNG in the LNG inlet passage such that at least a portion of the lubricant is entrained in the LNG in the LNG inlet passage and carried into the tank.
    Type: Application
    Filed: January 9, 2017
    Publication date: July 12, 2018
    Applicant: Caterpillar Inc.
    Inventors: Joshua T. Perko, Dana R. Coldren, Glenn B. Cox
  • Publication number: 20180195500
    Abstract: A cryogenic fluid pump includes an outlet tube extending along the pump centerline, the outlet tube having an outlet passage that is fluidly in communication with the combined outlet and with a pump outlet opening, and a shroud that extends concentrically along the outlet tube and has an inner diameter that is larger than an outer diameter of the outlet tube such that a gap is formed in a radial direction between an inner surface of the shroud and an outer surface of the outlet tube, the gap extending along at least a portion of the outlet tube.
    Type: Application
    Filed: January 12, 2017
    Publication date: July 12, 2018
    Applicant: Caterpillar Inc.
    Inventors: Dana R. Coldren, Dennis H. Gibson, Ankababu Kandlagunta, Sridhar Thangaswamy, Alan R. Stockner
  • Patent number: 10006449
    Abstract: A bearing arrangement for a wobble plate piston pump includes first, second, third, and fourth bearing assemblies. The first and second bearing assemblies support the drive shaft portion for rotation within the housing about the central longitudinal axis, while the third and fourth bearing assemblies support the load plate for rotation relative to the offset shaft portion of the shaft. The second bearing assembly is distally disposed from the first, the third disposed distally to second, and the fourth disposed distally to third. The fourth bearing assembly is the most distally disposed bearing assembly along the shaft.
    Type: Grant
    Filed: January 14, 2015
    Date of Patent: June 26, 2018
    Assignee: Caterpillar Inc.
    Inventors: Bryan E. Nelson, Daniel R. Baldwin, Alan R. Stockner, Robert M. Campion, Cory A. Brown, Joshua W. Steffen, Dana R. Coldren, Sana Mahmood
  • Publication number: 20180142679
    Abstract: A cryogenic pump includes a pressurization assembly configured to be submerged in a cryogenic liquid; a hydraulic actuation assembly; and a transmission assembly in communication between the pressurization assembly and the hydraulic actuation assembly. The transmission assembly including a conduit having a first end adjacent the hydraulic actuation assembly and a second end adjacent the pressurization assembly. The conduit is configured to contain a material having a first state at the first end and a different second state at the second end.
    Type: Application
    Filed: November 21, 2016
    Publication date: May 24, 2018
    Applicant: Caterpillar Inc.
    Inventors: Dana R. Coldren, David T. Montgomery
  • Patent number: 9970421
    Abstract: A pump for use in pressurizing a cryogenic fluid. The pump may have a barrel, and a boost enclosure disposed around the barrel. The pump may also have a boost plunger disposed inside the barrel and configured to discharge fluid into the boost enclosure. The pump may further have a main plunger disposed inside the barrel and configured to receive fluid from the boost enclosure and to increase a pressure of the fluid.
    Type: Grant
    Filed: March 25, 2015
    Date of Patent: May 15, 2018
    Assignee: Caterpillar Inc.
    Inventors: Dana R. Coldren, Sana Mahmood
  • Patent number: 9945364
    Abstract: A pump has a pump body and at least first and second pumping elements, each pumping element including a piston defining a head-end and a rod-end. The pump receives a pressurized fluid at an inlet, and returns fluid through a drain outlet. A hydraulic distributor operates to fluidly connect the head end of an extending piston to the pressurized fluid, and the rod end of the extending piston to the drain outlet. The hydraulic distributor further connects the rod-end of a retracting piston to the drain outlet, and the rod-end of one or more retracting pistons to the drain or to a return pressure, which is lower than an extending pressure.
    Type: Grant
    Filed: July 13, 2015
    Date of Patent: April 17, 2018
    Assignee: Caterpillar Inc.
    Inventors: Joshua W. Steffen, Dana R. Coldren
  • Patent number: 9915251
    Abstract: A pump system is disclosed for use with a fuel system of an engine. The pump system may have a first pump with a first end, a second end, a reservoir located at the second end, and at least one pump mechanism configured to receive fluid from the reservoir. The pump system may also have a second pump mounted to the first pump at the second end and having at least one pump mechanism configured to discharge fluid into the reservoir of the first pump. The pump system may further have a mechanical input operatively connected to the at least one pump mechanism of each of the first and second pumps.
    Type: Grant
    Filed: March 26, 2015
    Date of Patent: March 13, 2018
    Assignee: Caterpillar Inc.
    Inventors: Dana R. Coldren, Joshua W. Steffen
  • Patent number: 9909576
    Abstract: A cryogenic pump comprising a shaft disposed in a bearing. The shaft rotates with respect to the bearing housing, and the shaft includes an end with an angled face. The pump includes a drive at one end of the bearing housing. A tappet passage is formed through the drive housing. A pushrod housing connects to the drive housing. The pump includes a piston and a tappet sliding within the tappet passage. The tappet has a base end disposed within the tappet passage and a rod end extending below the tappet end of the drive housing. A fluid cavity is in the tappet passage between the piston and the tappet. The pump includes a pushrod connected to the tappet. The angled face of the shaft rotates and drives the piston toward the drive housing, pushing fluid within the fluid cavity against the tappet, driving the pushrod away from the drive housing.
    Type: Grant
    Filed: January 23, 2015
    Date of Patent: March 6, 2018
    Assignee: Caterpillar Inc.
    Inventors: Cory A. Brown, Bryan E. Nelson, Dana R. Coldren
  • Patent number: 9890741
    Abstract: A dual fuel common rail engine supplies pressurized natural gas and liquid diesel fuel at different pressures through a co-axial quill assembly for direct injection from a single fuel injector into an engine cylinder. Pressure waves in the gaseous fuel common rail are damped in a pressure damping chamber of the co-axial quill assembly to promote consistent gaseous fuel injection rates and quantities from the fuel injector.
    Type: Grant
    Filed: August 27, 2015
    Date of Patent: February 13, 2018
    Assignee: Caterpillar Inc.
    Inventors: Dennis H. Gibson, Shivangini S. Hazari, Dana R. Coldren, Daniel R. Baldwin
  • Publication number: 20170254417
    Abstract: A piston arrangement comprises a circumferential piston groove that can accommodate a seal for sealing between the piston and the cylinder bore when the piston moves in a reciprocal movement. The piston arrangement comprises a first fluid flow passage, defined at least in part by the piston body that fluidly connects the forward side of the cylinder bore with a space within the piston groove underneath the seal and a second fluid flow passage, defined in part by the piston body, which fluidly connects the rear side of the cylinder bore with the space within the piston groove underneath the seal. The two fluid flow passages allow a controlled fluid flow around the piston seal and comprise a channel provided in a lateral wall of the piston groove or an orifice provided in the piston body.
    Type: Application
    Filed: September 4, 2015
    Publication date: September 7, 2017
    Inventors: Timothy S. Coleman, Alan R. Stockner, Dana R. Coldren
  • Patent number: 9664122
    Abstract: A dual fuel engine utilizes a compression ignited pilot injection of liquid diesel fuel to ignite a mixture of gaseous fuel and air in each engine cylinder. The gaseous fuel is injected at a relatively low pressure directly into the engine cylinder from a fuel injector. The liquid diesel fuel is injected directly into the engine cylinder from the same fuel injector. In-cylinder dynamic gas blending during the compression stroke can reduce potential hydrocarbon slip that could occur when unburned fuel resides in crevice volumes within the engine cylinder.
    Type: Grant
    Filed: July 24, 2015
    Date of Patent: May 30, 2017
    Assignee: Caterpillar Inc.
    Inventors: Dana R. Coldren, Cory A. Brown
  • Publication number: 20170016434
    Abstract: A pump has a pump body and at least first and second pumping elements, each pumping element including a piston defining a head-end and a rod-end. The pump receives a pressurized fluid at an inlet, and returns fluid through a drain outlet. A hydraulic distributor operates to fluidly connect the head end of an extending piston to the pressurized fluid, and the rod end of the extending piston to the drain outlet. The hydraulic distributor further connects the rod-end of a retracting piston to the drain outlet, and the rod-end of one or more retracting pistons to the drain or to a return pressure, which is lower than an extending pressure.
    Type: Application
    Filed: July 13, 2015
    Publication date: January 19, 2017
    Applicant: CATERPILLAR INC.
    Inventors: Joshua W. Steffen, Dana R. Coldren
  • Publication number: 20160377068
    Abstract: A cryogenic fluid pump includes a plurality of pumping elements, each of the plurality of pumping elements having an actuator portion that is associated with and configured to selectively activate one end of a pushrod in response to a command by an electronic controller, an activation portion associated with an opposite end of the pushrod, and a pumping portion associated with the activation portion. For each of the plurality of pumping elements, the pumping portion is activated for pumping a fluid by the activation portion, which activation portion is activated by the actuator portion. The electronic controller is configured to selectively activate each of the plurality of pumping elements such that a flow of fluid from the cryogenic fluid pump results from continuous activations of the plurality of pumping elements at selected dwell times between activations of successive pumping elements.
    Type: Application
    Filed: June 29, 2015
    Publication date: December 29, 2016
    Applicant: CATERPILLAR INC.
    Inventors: Cory A. Brown, Adrienne M. Brasche, Sunil J. Bean, Shivangini S. Hazari, Sana Mahmood, Nikhil M. Arya, Joshua W. Steffen, Daniel R. Baldwin, Dana R. Coldren, Robert M. Campion, Alan R. Stockner
  • Patent number: 9518518
    Abstract: A compression ignition engine is fueled from common rail fuel injectors that predominately inject natural gas fuel that is compression ignited with a small pilot injection of liquid diesel fuel. Before and after a rapid load loss transient, the liquid and gaseous rail pressures are controlled toward respective pressures based upon engine speed and load. During the transient, the liquid rail pressure is controlled relative to the gas rail pressure in order to maintain the liquid rail pressure greater than the gas pressure during the transient to avoid migration gaseous fuel into the liquid fuel side of the system.
    Type: Grant
    Filed: April 19, 2013
    Date of Patent: December 13, 2016
    Assignee: Caterpillar Inc.
    Inventors: Dana R. Coldren, Steven Thomas Grant, Frank Lombardi, Daniel R. Puckett
  • Patent number: 9506434
    Abstract: A fuel injector includes first and second check valve members that open and close first and second nozzle outlet sets, respectively, to inject two fuels that differ in at least one of chemical identity, pressure and molecular state. The first check valve member defines a through passage, includes a closing hydraulic surface exposed to fluid pressure in the first control chamber, and moves into and out of contact with a first seat on an injector body. The second check valve member includes a closing hydraulic surface exposed to fluid pressure in a second control chamber, and moves into and out of contact with a second seat located on the first check valve member. A control valve member is movable between first and second positions that respectively block and allow fluid communication between the first and second control chambers and a drain outlet.
    Type: Grant
    Filed: August 29, 2012
    Date of Patent: November 29, 2016
    Assignee: Caterpillar Inc.
    Inventor: Dana R. Coldren
  • Publication number: 20160281666
    Abstract: A cryogenic pump is disclosed for use with a fuel system having a tank. The cryogenic pump may have a barrel, and a plunger configured to reciprocate within the barrel. The pump may also have an inlet configured to connect the tank to the barrel at a front side of the plunger, and an outlet connected to the barrel at the front side of the plunger. The pump may further have a vent line configured to extend from the barrel at a back side of the plunger to a location outside of the tank.
    Type: Application
    Filed: March 26, 2015
    Publication date: September 29, 2016
    Applicant: Caterpillar Inc.
    Inventor: Dana R. COLDREN