Caterpillar Inc.

Hoisan Kim

Mark F Sommars

Xiangdong Ding

Cory Andrew Brown

Dana Ray Coldren

Victor Iskander Yacoub

Alan Ray Stockner

Satya Naga Deepak Pillarisetti

Jianhua Zhang

Kevin James Schreader

Dennis Henderson Gibson

Robert Michael Campion

Mayank Mittal

Kenth I Svensson

Scott Byron Fiveland

Martin Leo Willi

Eric Lee Schroeder

Bryan Edward Nelson

Joshua W Steffen

Lifeng Wang

Glenn Brian Cox

Arnold Myoungjin Kim

Bao Feng

Dianqi Fang

Sridhar Thangaswamy

Steven Charles Taylor

Jin Hui Sun

Robert Joseph Smith

A dual fuel system includes a first fuel supply of a first fuel, a second fuel supply of a second fuel, and a variable-output fuel pump. A fuel injector in the dual fuel system includes a combined-fuel outlet passage, a nozzle check movable to open and close the combined-fuel outlet passage to nozzle outlets, and a check valve positioned at least partially in a first fuel passage connected to the first fuel supply by way of the variable-output fuel pump. The first fuel may include a compression-ignition fuel and the second fuel may include an alcohol fuel. Varying output of the fuel pump during an off-cycle of a cam actuating a plunger in the fuel injector meters the first fuel to the fuel injector for forming a fuel charge for injection. Related apparatus and methodology is also disclosed.

Dual fuel system and operating strategy metering fuel via varied fuel pump output

An alternative fuel management system may include a base configured for arrangement on a supporting floor or other framework of a vessel and configured to support alternative fuel supply equipment. The system may also include a sealed enclosure sealingly coupled to the base and configured to surround the alternative fuel supply equipment. The system may also include the alternative fuel supply equipment and it may be arranged within the sealed enclosure. The alternative fuel supply equipment may include a high-pressure pump, a fuel filter, a transfer pump, and a high-pressure fuel delivery line extending across the sealed enclosure and configured to provide alternative fuel from the high-pressure pump to a combustion engine. The alternative fuel management system may also include a purge fluid system configured to deliver purge fluid to the combustion engine from a source of purge fluid.

Containerized alternative fuel control unit

A dual fuel engine system includes an engine, and a fuel system including a pressurized fuel reservoir, a first fuel pump, and a plurality of second fuel pumps each having an actuating fluid inlet fluidly connected to at least one of the first fuel pump or the pressurized fuel reservoir. The plurality of second fuel pumps may intensify or de-intensify a pressure of a second fuel relative to a pressure of the first fuel used to actuate the second fuel pumps so as to obtain an increased flow rate of the second fuel. Related apparatus and methodology is also disclosed.

Dual fuel engine system having fuel-actuated unit pumps and method

An internal combustion engine system is described herein. The system uses a switching rail in combination with a first fuel rail to operate the internal combustion engine of the system. The first fuel rail receives the first fuel for combustion within one or more of the combustion cylinders of the internal combustion engine. The switching rails are configured to receive either the first fuel or a second fuel. A controller is used to operate a switching valve that, depending on the position of the switching valve, routes or directs either the second fuel or the first fuel from their respective fuel tanks. In a switching condition, such as startup, shutdown, or when the second fuel is not available, the controller can use the first fuel as the alternate source of fuel provided through the switching rail.

Switching fuel rail for a diesel fuel engine

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

A fuel injector system includes an injector body having a proximal end and a distal end, the injector body defining a nozzle having an outlet. The injector system includes a spill valve fluidly connected to the outlet and having a spill valve member movable between an open position and a closed position. The injector system includes a control valve including a control valve member movable between an open position and a closed position. The injector system includes a check valve fluidly connected to the outlet, the control valve including a check valve needle movable between an open position and a closed position. The injector system also includes an electrical monitoring circuit configured to output a signal indicative of at least one of the open position or the closed position of the spill valve member.

Fuel injector

A fuel system is disclosed. The fuel system may include at least one fuel injector, the at least one fuel injector having an injector body and one or more piezoelectric sensors located in the injector body. The fuel system may include a controller configured to: obtain, from the one or more piezoelectric sensors, one or more pressure measurements associated with a fuel injection process; determine a timing of the fuel injection process based on the one or more pressure measurements; determine an adjustment to the timing based on a comparison of the timing to a reference timing; and adjust the timing of the fuel injection process based on the determined adjustment.

Fuel injector monitoring

A fuel injector includes an injector body defining a liquid fuel passage, a gaseous fuel passage, and a first guide bore; a gaseous fuel check guided within the first guide bore between a retracted position and an advanced position to selectively open and block, respectively, fluid communication between the gaseous fuel passage and a gaseous fuel nozzle outlet; and a sleeve seal seated within the first guide bore, the sleeve seal having an inner surface defining a sleeve seal bore therethrough, and at least a portion of the gaseous fuel check is disposed within the sleeve seal bore; an outer surface of the sleeve seal including a first portion and a second portion, the first portion being disposed closer to a longitudinal axis of the sleeve seal bore along a radial direction than the second portion.

Dynamic seal for fuel injector needle check

A dual fuel injector may be used to inject both gas and liquid fuel into a cylinder of a compression ignition engine. An injector body defines a first set of nozzle outlets, a second set of nozzle outlets, a first fuel inlet and a second fuel inlet. A dual solenoid actuator includes a first armature, a first coil, a second armature and a second coil that share a common centerline. The dual solenoid actuator has a non-injection configuration at which the first armature is at an un-energized position and the second armature is at an un-energized position. The dual solenoid actuator has a first fuel injection configuration at which the first fuel inlet is fluidly connected to the first set of nozzle outlets, the first armature is at an energized position and the second armature is at the un-energized position.

Dual fuel injector and engine using same

A particulate separator for a gaseous fluid is provided. The particulate separator includes a sealable collection container defining a collection volume therein. The particulate separator also includes a gaseous fluid conduit provided through the sealable collection container. The gaseous fluid conduit defines an inner channel therein. The gaseous fluid conduit includes an inlet and an outlet. The gaseous fluid conduit also includes an arcuate segment provided between the inlet and the outlet. The arcuate segment includes a plurality of slits formed therein. The plurality of slits is configured to provide fluid communication between the collection volume and the inner channel of the gaseous fluid conduit.

Particulate separator

Growing community of inventors

Dunlap, IL, United States of America

Hoisan Kim