Caterpillar Inc.

Westport Power Inc.

Alan Ray Stockner

Scott F Shafer

Dana Ray Coldren

Dennis Henderson Gibson

Joshua W Steffen

Ye Tian

Norval J Wiemken

Cory Andrew Brown

Aaron Michael Brown

Ronald Dean Shinogle

Daniel Richard Ibrahim

Robert Michael Campion

David C Mack

Hoisan Kim

Lifeng Wang

Sridhar Thangaswamy

Mark F Sommars

Glenn Brian Cox

Sana Mahmood

Clifford E Cotton, Iii

Michael James Pollard

Amy Marie Hess

Jay E Tomaseski

Travis E Barnes

Richard H Holtman

William H Lane

William J Rodier

Sunil Jefferey Bean

Stephen Michael Wiley

Daniel Raymond Baldwin

Satya Naga Deepak Pillarisetti

Adrienne M Brasche

Mark S Cavanagh

Shivangini Singh Hazari

Olaf Ohligschlaeger

Thomas D Gens

Bernhard Kirsch

Rene Schulz

George Kodikulam Joseph

Denis A El-Darazi

John Jay Truhan, Jr

Suryanarayan Banduvula

Kit D Minnich

Stephen Robert Lewis

Martin Leo Willi

Daniel Reese Puckett

Scott Byron Fiveland

David Todd Montgomery

Bryan Edward Nelson

David Elliot Hackett

Gregory W Hefler

David E Martin

Marion Billingsley Grant, Jr

Jinhui Sun

Frank J Lombardi

Charles Bates

David Ginter

Avinash Reddy Manubolu

James J Grinsteiner

James R Blass

Thomas Jeffrey Crowell

Steven Y Tian

Thomas Randall McClure

Martin A Lehman

Victor Iskander Yacoub

Robert Lowell Miller

Thomas G Ausman

David J Beatty

Jay Venkataraghavan

Bradley E Bartley

Billy J Cagle

Zhenyu Li

Dianqi Fang

Timothy S Coleman

Gene Ray Slinkard

Mike Youakim

Gregg W Uhland

Mingchun Dong

Edward G Meints

Joseph Angelino

Paul Kenneth Stark

Brian Kenneth Garman

Scott A Chockley

Qiang Chen

John Unes

Xiaohui Gong

Bradley W Harrell

Chris Lee Stewart

Steven Charles Taylor

Colby Buckman

Manolis Gavaises

David L Fuelberth

Douglas E Longman

Nikhil M Arya

Olaf Ohligschläger

Luca Greco

Delos D Messinger

Graeme Mawhinney

Nandagopal Methil

Zhenyu (Jason) Li

A fuel injector is provided which has a valve member, a valve member guide and a spring chamber. Discharge of fuel out of a fuel injector outlet is controlled by movement of the valve member within a bore of the valve member guide. The spring chamber contains a biasing member, which is a compression spring, and which biases the valve member into contact with a valve seat when in a closed configuration. The fuel supply passage is provided, which by-passes the spring chamber, to direct a flow of the fuel to an outlet chamber of the fuel injector, and the cleaning fluid supply passage is provided to supply a pressurized cleaning fluid to a second end of the bore to restrict leakage of the fuel from the outlet chamber towards the second end of the bore along a clearance extending between the valve member and the valve member guide.

Fuel injector, a fuel injector assembly and an associated method

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.

Piston arrangement

A fuel system is disclosed for use with an engine. The fuel system may have a common rail, a first type of fuel injector fluidly connected to the common rail, and a second type of fuel injector fluidly connected to the common rail. The second type of fuel injector may include a pumping portion having a bore formed therein, and a plunger reciprocatingly disposed in the bore. The second type of fuel injector may also include an accumulator portion fluidly connected to the common rail and configured to receive fuel pushed from the bore of the pumping portion by the plunger, a nozzle portion, and a valve portion fluidly connecting the pumping, nozzle, and accumulator portions.

Common rail fuel system having pump-accumulator injectors

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.

Cryogenic fluid pump

A fuel system is disclosed for use with an engine, including a fuel injector assembly fluidly coupled with a low-pressure fuel conduit, an accumulator, and a cap within an opening in the accumulator. The fuel injector assembly may be structured to draw in low-pressure fuel, pressurize the fuel, and store the pressurized fuel in the accumulator for injection to a combustion chamber. The cap has a pressure sensor and a pressure relief valve therein, and drains fuel leaked past fluid seals between the cap and each of the pressure sensor, the pressure relief valve, and the accumulator by way of a common drain line.

Stand-alone common rail capable injector system

A linearly actuated hydraulic piston pump is provided. The pump includes a piston disposed between a first section and a second section of a piston chamber. The pump also includes a control valve having a valve body defining a valve chamber therein. The control valve also includes an inlet port, a first port, a regeneration port, a second port, and a spool. The spool in a first spool position fluidly couples a pressurized fluid source to the first section via the inlet port and the first port, and fluidly couples an accumulator to the second section via the regeneration port and the second port. The spool in the second spool position fluidly couples the first section to a drain via the first port and a drain port, and fluidly couples the second section to the pressurized fluid source via the inlet port and the second port.

Hydraulic drive system for a linearly actuated hydraulic piston pump

A control system for a dual fuel engine having a liquid fuel supply and a gaseous fuel supply is disclosed. The control system may include at least one sensor operably coupled to a cylinder of the dual fuel engine and configured to monitor cylinder condition and transmit a cylinder condition signal. Additionally, a controller may be communicably coupled with the at least one sensor and the controller may be configured to receive the cylinder condition signal and determine whether the cylinder is operating in an abnormal operating condition. Whereas the controller determines the cylinder is operating in the abnormal operating condition, the controller sends a control signal for the liquid fuel supply to provide an amount of liquid fuel which is greater than an amount of liquid fuel supplied to the cylinder during a normal operating condition.

Mitigation of intermittent cylinder misfire on dual fuel engines

A pushrod assemblymay include a seal carrierfor a spaced seal assemblyand/or a seal carrierfor a stacked seal assembly, the spaced seal assembly including first and second annular sealsseparated by a spacerto isolate between the seals a vented regionof the pushrod housing, the stacked seal assembly including at least two annular sealsstacked on the seal carrier. Each seal assembly can be removed and replaced via an access endof the seal carrier after detaching the access end from an adjacent component of the assembly. The seal carriers may be incorporated into a cryogenic pumpwherein at least one annular seal is arranged on each seal carrier to seal the pushrod assemblywithin its housing

Reciprocating pushrod assembly and cryogenic pump

A pumping mechanism is disclosed. The pumping mechanism may include a barrel formed of a barrel substrate and including a first end surface, a second end surface opposite the first end surface, and a bore between the first and second end surfaces. Each of the first and second end surfaces and the bore is coated with a metal plating. The pumping mechanism may further include a plunger formed of a plunger substrate and configured to be slidably disposed in the bore in barrel, the plunger substrate having a tribological coating.

Pump with wear-resistant barrel and plunger having coating support

A pump plunger is disclosed. The plunger may include a proximal end and a distal end opposite the proximal end. The plunger may also include a body portion extending between the proximal end and a second transition datum, and additionally include a transition section extending between a first transition datum and the second transition datum. The transition section may have a non-linear geometric profile. A first shoulder portion may be positioned adjacent to the transition section that may extend between the second transition datum and a third datum. The third datum may be positioned radially inward of the second transition datum. The plunger may also include a tip portion positioned adjacent to the first shoulder portion that may extend between the third datum and a fourth datum positioned at the distal end. The fourth datum may be positioned radially inward of the third datum.

Pump plunger for a linearly actuated pump

A cryogenic pump for pumping cryogenic fluid is provided. The pump includes a pump assembly adapted for exposure to cryogenic fluid that includes a plurality of pumping elements disposed about a pump axis. A drive assembly drives the pumping elements to pump cryogenic fluid. A plurality of actuating elements are arranged circumferentially about the pump axis, each actuating element operatively interconnecting the drive assembly with a respective one of the pumping elements. Each actuating element includes a first portion disposed a first radial distance from the pump axis and a second portion disposed a second radial distance from the pump axis with the first radial distance being less than the second radial distance at ambient temperature.

Drive assembly and pump assembly arrangement for cryogenic pump

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.

Hydraulic drive multi-element cryogenic pump

A pump piston is disclosed. The pump piston may include a body having an actuating end, a pressurizing end opposite the actuating end, and an outer diameter that is greater at the pressurizing end than at the actuating end, wherein the outer diameter varies between the pressurizing end and the actuating end without increasing to form an outer diameter profile.

Pump piston having variable diameter

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.

Bearing arrangement for cryogenic pump

A cryogenic pump configured for pressurizing a cryogenic fluid is provided. The cryogenic pump includes a warm end portion adapted to not contact cryogenic fluid during operation of the pump and including one or more driving components. The cryogenic pump includes a cold end portion adapted to contact cryogenic fluid during operation of the pump and including a pump inlet and a pump outlet. An insulating arrangement including an insulator plate is arranged between the warm end portion and the cold end portion and defines a first air gap between the cold end portion and the insulator plate.

Cryogenic pump with insulating arrangement

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Metamora, IL, United States of America

Alan Ray Stockner