Caterpillar Inc.

Other

Cory Andrew Brown

Dana Ray Coldren

Joshua W Steffen

Hoisan Kim

Sunil Jefferey Bean

Adrienne M Brasche

Alan Ray Stockner

Victor Iskander Yacoub

Sana Mahmood

Satya Naga Deepak Pillarisetti

Robert Michael Campion

Glenn Brian Cox

Roger Leroy Urven, Jr

Jianhua Zhang

Kevin James Schreader

Mary Lou Kesse

Daniel Raymond Baldwin

Daniel Reese Puckett

Mark F Sommars

Bryan Edward Nelson

Kevin Patrick Duffy

Frank J Lombardi

Zhenyu Li

Steven Grant

Sridhar Thangaswamy

Adam L Stecklein

Matthew Robert Vanderveen

Scott F Shafer

Martin Leo Willi

David Todd Montgomery

Wade James Robel

Lifeng Wang

Michael James Pollard

Yung T Bui

Xiangdong Ding

Sudhindra Ayanji

Dianqi Fang

Shivangini Singh Hazari

Darrel Henry Meffert

Mayank Mittal

Michael Curtis Herr

George Kodikulam Joseph

Adwait Vilas Joshi

Josh Driscoll

Paul Joseph Desiderio

Nikhil M Arya

R Zachary Richey

Andrew Justin Wallis

Robert Joseph Smith

Mark Harold Runge

A fuel injector assembly for a fuel-actuated fuel injector includes an injector body, and an injection control valve assembly. The injector body includes therein a low-pressure fuel passage extending from a clamping face to an armature cavity to convey spent actuating fuel to the armature cavity. The fuel injector assembly also includes a flushing drain formed by the injector body and fluidly connected to at least one of a valve pin bore in the injector body or the armature cavity. The flushing drain forms, together with the low-pressure fuel passage and the armature cavity, a cooling circuit for the spent actuating fuel. The flushing drain extends to a drain opening formed in an outer body surface of the injector body. Related methodology is also disclosed.

Fuel-actuated fuel injector having cooling fuel circuit and method

A fuel injector includes an injector body and a valve stack within the injector body that includes a valve seat plate. The valve seat plate includes a pressure control passage for controlling fuel injection, and a valve seat positioned fluidly between the pressure control passage and a low-pressure drain. The valve seat plate includes a pressure-limiting annular groove that extends circumferentially around the valve seat and axially inward from a side of the valve seat plate where the valve seat is located. The groove enables deformation in response to pressure differences across the valve seat plate in a manner that limits stress concentrations.

Fuel injector including valve seat plate having stress-limiting groove

A fuel injector includes a needle valve including a spring-retaining section and a guide section that is adjacent to the spring-retaining section. The spring-retaining section includes an elongated portion and a flange that are together configured to support a spring assembly. The guide section includes a plurality of constricted portions alternatingly arranged with a plurality of expanded portions to define an undulating shape of the guide section. Each of the plurality of expanded portions includes a plurality of indentations to permit fuel to travel therealong to exit an outlet of the fuel injector. The guide section has a length that is substantially equal to a length of the spring-retaining section.

Check valve for a fuel injector

A fuel injector includes an injector housing, an outlet check, an injection control valve assembly, and a valve seat orifice plate integrating a valve seat and various orifices for outlet check control. In the valve seat orifice plate a drain orifice extends between a valve seat surface and a check control chamber formed between a closing hydraulic surface of the outlet check and the valve seat orifice plate. First and second re-pressurization orifices extend between an outer surface of the valve seat orifice plate and the check control chamber.

Fuel injector having valve seat orifice plate with valve seat and drain and re-pressurization orifices

A fuel system includes a fuel injector having a split check assembly with a control piece, an outlet piece, and a check sleeve. A trapped volume is formed between the control piece and the outlet piece within the check sleeve, to hydraulically couple the control piece to the outlet piece. A starting rate shape clearance fluidly connects the trapped volume to a fuel cavity and is formed between the check sleeve and one of the control piece or outlet piece received therein, and modulates a starting rate shape of fuel injection from the fuel injector. Related methodology is disclosed.

Trapped volume split check assembly in fuel injector

Injector

A fuel injector includes an injector body, and a stack within the injector body, and having a nozzle supply passage therein. The stack includes a solenoid assembly having a solenoid housing piece with a fuel bore formed therein that includes a segment of the nozzle supply passage. The solenoid housing piece includes a solenoid housing material in a base state, and a solenoid housing material in a residual compressive stressed state, with the fuel bore being formed by the solenoid housing material in the residual compressive stressed state. Residual stresses may be imparted by ballizing, nitriding, carburizing, autofrettage, or still another technique.

Fuel injector having residually stressed solenoid housing for improved pressure capapility

An engine head assembly includes a plurality of fuel injectors each positioned within a fuel injector bore in the engine head, and each being fluidly coupled with a fluid conduit. Each fuel injector includes a valve assembly positioned within a fuel injector case that includes an elongate body having an opening. A filter sleeve having a particle-blocking perforation array structured to block particles is press fit on the fuel injector case to form a fluid flow path from the fluid conduit into the fuel injector case.

Perforated integral filter sleeve for fuel injector and fuel system setup method

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 hydraulic piston pump includes a reciprocal piston disposed in a blind housing bore of a piston housing to generate a pumping action. To accommodate the piston, a piston cartridge is installed in each of the housing bores. The piston cartridge includes a piston sleeve having an inner sleeve periphery, a first outer sleeve periphery, and a second outer sleeve periphery. The inner sleeve periphery is configured to establish sliding contact with the piston. The first outer sleeve periphery has a first outer sleeve diameter that is larger than a second outer sleeve diameter of the second outer sleeve periphery. To seal against the blind housing bore, a liner cap having a cylindrical liner wall and an axial liner cover is disposed over the first outer sleeve periphery. The axial liner cover abuts a housing bore ceiling of the blind housing bore and can receive hydraulic fluid there through.

Piston cartridge for piston pump

A cryogenic pump system includes a supply of liquid natural gas, a source of hydraulic fluid, a cryogenic pump, and an electronic control module. The cryogenic pump is operatively arranged with the supply of liquid natural gas and the source of hydraulic fluid. The cryogenic pump is configured to operate using the source of hydraulic fluid to compress at least some of the supply of liquid natural gas for delivery to an engine. The electronic control module is operably arranged with the cryogenic pump and configured to selectively operate the cryogenic pump. Control strategies for operating the cryogenic pump system are disclosed which have reduced power demands.

Method of operating cryogenic pump and cryogenic pump system

Growing community of inventors

Pekin, IL, United States of America

Cory Andrew Brown