公开(公告)号：US11815054B2

公开(公告)日：2023-11-14

申请号：US17831668

申请日：2022-06-03

Applicant: Caterpillar Inc.

Inventor： Eric Lee Schroeder ,  David Todd Montgomery ,  Dana Ray Coldren ,  Chad Koci

IPC: F02M43/04 ,  F02D19/06 ,  F02D19/10 ,  F02M47/02

CPC classification number: F02M43/04 ,  F02D19/0694 ,  F02D19/0649 ,  F02D19/10 ,  F02M47/027 ,  F02M2200/46

Abstract: A dual fuel system for an internal combustion engine includes a first fuel supply of a liquid pilot fuel, a primary fuel supply of a liquid primary fuel, and a dual fuel injector. The dual fuel injector includes a spill valve fluidly connected with a plunger cavity and movable to control a start of injection and an end of injection, and an admission valve. The admission valve is movable to admit a pilot fuel into the fuel injector, such that the pilot fuel is conveyed through an outlet check to form, within a primary fuel passage fluidly connected to the plunger cavity, a segmented fuel charge of leading pilot fuel and trailing primary fuel by displacing some of the primary fuel. The liquid pilot fuel may be a higher cetane/lower octane liquid fuel, and the primary fuel may be a lower cetane/higher octane liquid fuel.

公开(公告)号：US12129807B2

公开(公告)日：2024-10-29

申请号：US17737528

申请日：2022-05-05

Applicant: Caterpillar Inc.

Inventor： Eric Lee Schroeder ,  Michael Todd Graziano, Jr. ,  Jaswinder Singh ,  David Todd Montgomery

IPC: F02D41/00 ,  F02D19/06 ,  F02D19/08 ,  F02D41/14

CPC classification number: F02D41/0027 ,  F02D19/0644 ,  F02D19/081 ,  F02D41/1452 ,  F02D41/1406

Abstract: Operating an engine system includes combusting a gaseous hydrogen fuel (H2) and a gaseous hydrocarbon fuel (HC) at a first substitution ratio in a cylinder in an engine, determining at least one of an H2 fueling command or an HC fueling command based on an H2 availability input and an H2 cost, and outputting the H2 fueling command and the HC fueling command to an H2 injector and an HC admission valve, respectively. Operating the engine system further includes combusting H2 and HC at a varied substitution ratio based on the H2 fueling command and the HC fueling command. At least one of the H2 fueling command or the HC fueling command may be based on a monitored CO2 exhaust level which may be used to populate a stored history of CO2 output.

公开(公告)号：US20240068417A1

公开(公告)日：2024-02-29

申请号：US17895549

申请日：2022-08-25

Applicant: Caterpillar Inc.

Inventor： Jaswinder Singh ,  David Todd Montgomery

IPC: F02D19/06 ,  F02D19/02 ,  F02D19/08

CPC classification number: F02D19/0615 ,  F02D19/021 ,  F02D19/081

Abstract: Operating a gaseous fuel engine system includes outputting control commands to a first fuel admission valve and a second fuel admission valve to admit, respectively, a gaseous fuel blend containing a gaseous hydrogen fuel (H2), and additional H2, into a gaseous fuel engine. An amount of the additional H2 is determined by way of the respective control command based on a performance target for an engine parameter varying on the basis of a relative amount of H2 in a combustion charge. Related apparatus and control logic is also disclosed.

公开(公告)号：US20220162971A1

公开(公告)日：2022-05-26

申请号：US17101745

申请日：2020-11-23

Applicant: Caterpillar Inc.

Inventor： David Todd Montgomery

IPC: F01N3/20 ,  F01N3/08 ,  F01N3/10

Abstract: An aftertreatment system for treatment of exhaust gases exiting an engine includes a first Selective Catalytic Reduction (SCR) device in fluid communication with the engine. The first SCR device receives the exhaust gases exiting the engine for reducing a first quantity of oxides of nitrogen (NOx) present in the exhaust gases. The aftertreatment system also includes an oxidation catalyst in fluid communication with the first SCR device. The oxidation catalyst receives the exhaust gases exiting the first SCR device for oxidizing ammonia present in the exhaust gases into a second quantity of NOx. The aftertreatment system further includes a second SCR device in fluid communication with the oxidation catalyst. The second SCR device receives the exhaust gases exiting the oxidation catalyst for reducing the second quantity of NOx.

公开(公告)号：US20180283315A1

公开(公告)日：2018-10-04

申请号：US15475848

申请日：2017-03-31

Applicant: Caterpillar Inc.

Inventor： Bobby John ,  Jonathan W. Anders ,  David Todd Montgomery ,  Kenth I. Svensson

IPC: F02F3/28 ,  F02M61/14 ,  F02M61/18 ,  F02D41/40

Abstract: A combustion system for an internal combustion engine includes a cylinder having a cylinder wall defining a bore, a piston disposed inside the bore, a combustion chamber delimited by a cylinder head, the cylinder wall, and the piston. The piston includes a piston bowl defining a floor portion, and at least one scooped recess extending radially outwardly from a periphery of the piston bowl. The internal combustion engine further includes a fuel injector configured to inject fuel into the combustion chamber as a plurality of fuel jets at a main injection timing such that each fuel jet contacts the floor portion of the piston bowl and follows a profile of the piston bowl and enter the at least one scooped recess. Furthermore, at least one of the plurality of is deflected by the at least one scooped recess away from the cylinder wall.

公开(公告)号：US20240068418A1

公开(公告)日：2024-02-29

申请号：US17895551

申请日：2022-08-25

Applicant: Caterpillar Inc.

Inventor： Andrew Joseph Loetz ,  Jaswinder Singh ,  David Todd Montgomery

IPC: F02D19/08 ,  F02D19/06

CPC classification number: F02D19/081 ,  F02D19/0602 ,  F02D19/0644

Abstract: Operating a gaseous fuel engine system includes conveying hydrogen fuel and hydrocarbon fuel into a cylinder in a gaseous fuel engine for combustion. Operating a gaseous fuel engine system further includes receiving an increased engine power output request, boosting a power output of the gaseous fuel engine by varying a ratio of the hydrogen fuel and the hydrocarbon fuel combusted in the cylinder, and varying an in-cylinder combustion parameter based on the varying a ratio. Perturbation to a performance profile of the gaseous fuel engine is thereby limited. Related apparatus and control logic is also disclosed.

公开(公告)号：US11891962B1

公开(公告)日：2024-02-06

申请号：US17895549

申请日：2022-08-25

Applicant: Caterpillar Inc.

Inventor： Jaswinder Singh ,  David Todd Montgomery

IPC: F02D19/06 ,  F02D19/08 ,  F02D19/02

CPC classification number: F02D19/0615 ,  F02D19/021 ,  F02D19/0642 ,  F02D19/0644 ,  F02D19/0647 ,  F02D19/081

Abstract: Operating a gaseous fuel engine system includes outputting control commands to a first fuel admission valve and a second fuel admission valve to admit, respectively, a gaseous fuel blend containing a gaseous hydrogen fuel (H2), and additional H2, into a gaseous fuel engine. An amount of the additional H2 is determined by way of the respective control command based on a performance target for an engine parameter varying on the basis of a relative amount of H2 in a combustion charge. Related apparatus and control logic is also disclosed.

公开(公告)号：US20230349339A1

公开(公告)日：2023-11-02

申请号：US17734625

申请日：2022-05-02

Applicant: Caterpillar Inc.

Inventor： Kenth I. Svensson ,  David Todd Montgomery

IPC: F02D41/14 ,  F02D41/00 ,  F02M25/035 ,  F02M25/022

CPC classification number: F02D41/1461 ,  F02D41/1406 ,  F02D41/0027 ,  F02M25/035 ,  F02M25/0227 ,  F02D2250/36

Abstract: Operating an internal combustion engine system includes feeding a stream of pressurized intake air to a plurality of cylinders in an engine for combustion with a methanol fuel. An engine parameter indicative of at least one of an exhaust NOx level or a change to the exhaust NOx level of the engine is monitored, and water injected into an intake conduit for the engine based on the monitored engine parameter to limit the exhaust NOx level of the engine. Related apparatus and control logic is disclosed.

公开(公告)号：US20220290641A1

公开(公告)日：2022-09-15

申请号：US17831668

申请日：2022-06-03

Applicant: Caterpillar Inc.

Inventor： Eric Lee Schroeder ,  David Todd Montgomery ,  Dana Ray Coldren ,  Chad Koci

IPC: F02M43/04 ,  F02D19/06

Abstract: A dual fuel system for an internal combustion engine includes a first fuel supply of a liquid pilot fuel, a primary fuel supply of a liquid primary fuel, and a dual fuel injector. The dual fuel injector includes a spill valve fluidly connected with a plunger cavity and movable to control a start of injection and an end of injection, and an admission valve. The admission valve is movable to admit a pilot fuel into the fuel injector, such that the pilot fuel is conveyed through an outlet check to form, within a primary fuel passage fluidly connected to the plunger cavity, a segmented fuel charge of leading pilot fuel and trailing primary fuel by displacing some of the primary fuel. The liquid pilot fuel may be a higher cetane/lower octane liquid fuel, and the primary fuel may be a lower cetane/higher octane liquid fuel.

公开(公告)号：US10456715B2

公开(公告)日：2019-10-29

申请号：US15218933

申请日：2016-07-25

Applicant: Caterpillar Inc.

Inventor： Daniel Raymond Baldwin ,  David Todd Montgomery

IPC: B01D27/08 ,  F02M37/22 ,  F01M11/03 ,  F16J15/16

Abstract: A seal arrangement for joining a first component to a second component is disclosed. The seal arrangement may have a first sealing surface formed as an integral portion of the first component, and a second sealing surface formed as an integral portion of the second component and configured to directly engage the first sealing surface. The seal arrangement may also have an energizer engaged with the first sealing surface and configured to inhibit movement of the first sealing surface away from the second sealing surface during a temperature drop.