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公开(公告)号：US20240068425A1
公开(公告)日：2024-02-29
申请号：US17894768
申请日：2022-08-24
Applicant: Caterpillar Inc.
Inventor： Andrew Joseph Loetz
CPC classification number: F02F1/4264 , F02F1/36 , F02M26/35 , F02M26/41 , F02F2001/4278 , F02F2200/06
Abstract: An engine system includes a cylinder block, and a cylinder head attached to the cylinder block and including exhaust ports. Exhaust collection passages are formed in the cylinder head and each fluidly connect to one of the exhaust ports. An unburned hydrocarbon (UHC) emissions mitigation conduit fluidly connects to the exhaust ports to route UHC to an oxidation catalyst or for recirculation.
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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：US12158121B2
公开(公告)日：2024-12-03
申请号：US17894768
申请日：2022-08-24
Applicant: Caterpillar Inc.
Inventor： Andrew Joseph Loetz
Abstract: An engine system includes a cylinder block, and a cylinder head attached to the cylinder block and including exhaust ports. Exhaust collection passages are formed in the cylinder head and each fluidly connect to one of the exhaust ports. An unburned hydrocarbon (UHC) emissions mitigation conduit fluidly connects to the exhaust ports to route UHC to an oxidation catalyst or for recirculation.
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Patent Agency Ranking
4.发明授权公开(公告)号：US11959414B2
公开(公告)日：2024-04-16
申请号：US17702292
申请日：2022-03-23
Applicant: Caterpillar Inc.
Inventor： Eric Lee Schroeder , Andrew Joseph Loetz , Jaswinder Singh , Yongxian Gu , Jonathan William Anders , Naga Krishna Chaitanya Kavuri
CPC classification number: F02B43/12 , F02B19/12 , F02B19/18 , F02F3/28 , F02M21/0209 , F02M21/023
Abstract: Operating a gaseous fuel engine includes spark-igniting gaseous hydrogen fuel and air, and propagating combustion gases of the spark-ignited mixture outwardly from a spark gap. The propagating combustion gases are impinged upon a cone surface of a piston so as to limit a flame area of the propagating combustion gases. Additional gaseous hydrogen fuel and air is ignited in the combustion cylinder by way of the propagating combustion gases to urge a piston toward a bottom-dead-center position.
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5.发明公开公开(公告)号：US20230304436A1
公开(公告)日：2023-09-28
申请号：US17702292
申请日：2022-03-23
Applicant: Caterpillar Inc.
Inventor： Eric Lee Schroeder , Andrew Joseph Loetz , Jaswinder Singh , Yongxian Gu , Jonathan William Anders , Naga Krishna Chaitanya Kavuri
CPC classification number: F02B43/12 , F02F3/28 , F02B19/12 , F02M21/0209 , F02M21/023 , F02B19/18
Abstract: Operating a gaseous fuel engine includes spark-igniting gaseous hydrogen fuel and air, and propagating combustion gases of the spark-ignited mixture outwardly from a spark gap. The propagating combustion gases are impinged upon a cone surface of a piston so as to limit a flame area of the propagating combustion gases. Additional gaseous hydrogen fuel and air is ignited in the combustion cylinder by way of the propagating combustion gases to urge a piston toward a bottom-dead-center position.
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公开(公告)号：US12163451B1
公开(公告)日：2024-12-10
申请号：US18385380
申请日：2023-10-30
Applicant: Caterpillar Inc.
Inventor： Andrew Joseph Loetz , Joshua Lynn Ratts , Eric Lee Schroeder , Joel Hiltner
Abstract: A combined heat and power system for generating power using a hydrogen internal combustion engine and producing usable heat from the exhaust gases of the hydrogen internal combustion engine is described. The system includes a heat exchanger and reduction device, such as a catalytic converter. The heat exchanger may extract heat from the exhaust gases upstream of the catalytic converter and thereby control the heat of exhaust gases provided to the catalytic converter for reduction of exhaust gases. The catalytic converter may use hydrogen as a reducing agent, thereby using the same fuel source for powering the engine and reduction of the exhaust gases rather than separate working fluids. The heat exchanger and/or operating parameters of the system may be controlled to control a temperature of exhaust gases at the catalytic converter and thereby control efficiency of the conversion of exhaust gases.
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7.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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8.发明授权公开(公告)号：US11773795B1
公开(公告)日：2023-10-03
申请号：US17879992
申请日：2022-08-03
Applicant: Caterpillar Inc.
Inventor： Jaswinder Singh , Eric Lee Schroeder , Andrew Joseph Loetz , Ryan Mchael Snodgrass , Adam Joseph Clute , Patrick John Seiler , Christopher Ronald Gehrke
CPC classification number: F02D41/0027 , F02B19/1009 , F02B19/12 , F02D41/0002 , F02D41/1401 , F02D41/1454 , F02D2041/1433 , F02D2200/101
Abstract: Operating a gaseous fuel engine system includes spark-igniting a gaseous hydrogen fuel and air in a prechamber sparkplug to ignite a main charge containing gaseous hydrogen fuel and air in a cylinder. Operating the gaseous fuel engine system also includes determining a preignition condition and conveying cooling air to the prechamber sparkplug based on the preignition condition to limit preignition of gaseous hydrogen fuel and air in the prechamber sparkplug. Related apparatus and control logic is also disclosed.
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