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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
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.
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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.
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.
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3.发明公开公开(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
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.
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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
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.
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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
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.
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Patent Agency Ranking
公开(公告)号：US12104546B2
公开(公告)日：2024-10-01
申请号：US17895551
申请日：2022-08-25
Applicant: Caterpillar Inc.
Inventor： Andrew Joseph Loetz , Jaswinder Singh , David Todd Montgomery
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.
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公开(公告)号：US11566545B2
公开(公告)日：2023-01-31
申请号：US16401765
申请日：2019-05-02
Applicant: Caterpillar Inc.
Inventor： David Yu Zhang Chang , David Todd Montgomery , Scott Fiveland , Scott F. Shafer
Abstract: A gas engine is disclosed. The gas engine may include a combustion cylinder. The combustion cylinder may include an intake with an intake valve. The combustion cylinder may include an exhaust with an exhaust valve. The gas engine may include a gas admission valve assembly coupled to the intake. The gas admission assembly may include a trimmable electro-hydraulically actuatable gas admission valve to control a gas flow into the intake.
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公开(公告)号：US20220243691A1
公开(公告)日：2022-08-04
申请号：US17167211
申请日：2021-02-04
Applicant: Caterpillar Inc.
Inventor： Eric Lee Schroeder , David Todd Montgomery , Dana Ray Coldren , Chad Koci
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.
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公开(公告)号：US11384721B1
公开(公告)日：2022-07-12
申请号：US17167211
申请日：2021-02-04
Applicant: Caterpillar Inc.
Inventor： Eric Lee Schroeder , David Todd Montgomery , Dana Ray Coldren , Chad Koci
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.
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10.发明公开公开(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
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.
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