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公开(公告)号：US12044186B1
公开(公告)日：2024-07-23
申请号：US18526619
申请日：2023-12-01
Applicant: Caterpillar Inc.
Inventor： Kenth I. Svensson , Jonathan W. Anders , Yongli Qi
CPC classification number: F02D19/061 , F02D41/0025
Abstract: Operating an engine system includes autoigniting a first fuel including a plurality of liquid fuels premixed with air, to trigger ignition of a direct-injected main fuel in a first engine cycle, and receiving data indicative of an undesired heat release of combustion of the first fuel. The undesired heat release may include an undesired heat release rate (HRR) modality such as a multistage combustion. Relative amounts of the plurality of the liquid fuels are varied and admitted to the cylinder in a second engine cycle, and the first fuel having the varied relative amounts autoignited to trigger ignition of the direct-injected main fuel in the second engine cycle. The undesired heat release can be limited in the second engine cycle based on the varied relative amounts of the liquid fuels. The first fuel may include a blend of dimethyl ether (DME), methanol (MeOH), and water. The direct-injected main fuel may include MeOH and water. Related apparatus and control logic is also disclosed.
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公开(公告)号：US11649761B1
公开(公告)日：2023-05-16
申请号：US17559288
申请日：2021-12-22
Applicant: Caterpillar Inc.
Inventor： Kenth I. Svensson , Jonathan W. Anders , Naga Krishna Chaitanya Kavuri
Abstract: An exhaust heater system includes an exhaust heater and an air supply tube disposed within the exhaust heater. Relatively hot exhaust gas from an engine is directed into the exhaust heater, whereby heat from the exhaust heats the interior of the air supply tube. The heat partially vaporizes liquid methanol injected into the air supply tube. To control the amount of heating, the exhaust can be directed to the air supply tube as well as an exhaust bypass, whereby exhaust directed to the exhaust bypass does not heat the interior of the air supply tube.
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3.发明授权公开(公告)号：US10934966B2
公开(公告)日：2021-03-02
申请号：US16279564
申请日：2019-02-19
Applicant: Caterpillar Inc.
Inventor： Jonathan W. Anders , Jason Jon Rasmussen , Bobby John
Abstract: A combustion control system for a dual fuel engine includes a combustion control unit structured to receive phasing data for combustion of a main charge of gaseous fuel ignited by way of pilot shots of a liquid fuel, output a pilot fueling command based on the phasing data, and output a valve timing command. The combustion control unit is further structured to vary a phasing of combustion of a main charge of a gaseous fuel ignited by pilot shots of a liquid fuel based on an adjustment to at least one of a pilot shot delivery parameter or a valve timing parameter such as intake valve closing timing from a first engine cycle to a second engine cycle. Control of the intake valve timing can be based on a main pilot shot timing error.
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4.发明申请公开(公告)号：US20200263627A1
公开(公告)日：2020-08-20
申请号：US16279564
申请日：2019-02-19
Applicant: Caterpillar Inc.
Inventor： Jonathan W. Anders , Jason Jon Rasmussen , Bobby John
Abstract: A combustion control system for a dual fuel engine includes a combustion control unit structured to receive phasing data for combustion of a main charge of gaseous fuel ignited by way of pilot shots of a liquid fuel, output a pilot fueling command based on the phasing data, and output a valve timing command. The combustion control unit is further structured to vary a phasing of combustion of a main charge of a gaseous fuel ignited by pilot shots of a liquid fuel based on an adjustment to at least one of a pilot shot delivery parameter or a valve timing parameter such as intake valve closing timing from a first engine cycle to a second engine cycle. Control of the intake valve timing can be based on a main pilot shot timing error.
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公开(公告)号：US10718257B1
公开(公告)日：2020-07-21
申请号：US16248561
申请日：2019-01-15
Applicant: Caterpillar Inc.
Inventor： Jonathan W. Anders , Bobby John
Abstract: A method of operating a dual-fuel combustion system includes reciprocating a piston between a bottom dead center and a top dead center of a cylinder, the piston including a piston bowl, a circumferentially extending recess located radially outside of the piston bowl, and a plurality of diverters in the recess. The method includes opening an intake valve to introduce a first fuel, and injecting, by a set of fuel injector orifices substantially aligned with the diverters, a second fuel toward the diverters. The method also includes autoigniting the second fuel to ignite the first fuel.
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Patent Agency Ranking
公开(公告)号：US10704492B1
公开(公告)日：2020-07-07
申请号：US16248604
申请日：2019-01-15
Applicant: Caterpillar Inc.
Inventor： Jonathan W. Anders , Bobby John
Abstract: A piston for an internal combustion engine includes a piston head having a central axis and a top surface. The top surface of the piston includes a piston bowl, a circumferentially extending recess located radially outside the piston bowl, a plurality of diverters located within the recess, and a crown portion located radially outside the recess and extending to an outer surface of the piston.
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公开(公告)号：US10378495B2
公开(公告)日：2019-08-13
申请号：US15796916
申请日：2017-10-30
Applicant: Caterpillar Inc.
Inventor： Bobby John , Glen Martin , Jonathan W. Anders , Robert Campion
Abstract: A fuel system includes a fuel injector having a fuel passage and a purging fluid passage formed therein. A nozzle tip inner surface defines a sac forming a blind end of the fuel passage in the fuel injector. A coaxial concentric check assembly includes a purging check movable to admit a purging fluid such as pressurized air into the fuel passage to purge the sac of fuel. Reduced injector dribble is observed from the purging of fuel.
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公开(公告)号：US12078129B2
公开(公告)日：2024-09-03
申请号：US18082099
申请日：2022-12-15
Applicant: Caterpillar Inc.
Inventor： Jonathan W. Anders , Bobby John , Chad Palmer Koci , Naga Krishna Chaitanya Kavuri
CPC classification number: F02M21/023 , F02F1/24 , F02F2001/244
Abstract: A gaseous fuel engine includes an engine housing having a cylinder block with a combustion cylinder therein, and an engine head including an intake port, an exhaust port, a fuel port, and an igniter bore, each extending to a fire deck. The gaseous fuel engine includes a fuel admission valve movable to close and open the fuel port. A non-axisymmetric clearance is defined between an inner port surface and the fuel admission valve and directionally biases a flow of gaseous fuel from the fuel port. Related methodology is also disclosed.
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公开(公告)号：US10982601B2
公开(公告)日：2021-04-20
申请号：US16355210
申请日：2019-03-15
Applicant: Caterpillar Inc.
Inventor： Jonathan W. Anders , Bobby John
Abstract: A method of controlling a dual fuel engine system includes adjusting a phasing control parameter such as air-fuel ratio (AFR), based on a phasing signal to limit an error in a phasing of combustion of gaseous fuel. The cylinder is switched to a dual fuel liquid pilot-ignited mode by commanding direct injection of an early pilot shot of liquid fuel, based on the adjustment to the phasing control parameter, and production of a spark to ignite gaseous fuel in the cylinder. Switching the cylinder to the dual fuel liquid pilot-ignited mode is completed by commanding direct injection of an early pilot shot and a second pilot shot of liquid fuel to ignite gaseous fuel in response to combustion of the early and second pilot shots in the cylinder.
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公开(公告)号：US10690107B1
公开(公告)日：2020-06-23
申请号：US16278310
申请日：2019-02-18
Applicant: Caterpillar Inc.
Inventor： Jonathan W. Anders , Bobby John
Abstract: An igniter for a dual fuel engine includes a plurality of spray orifices formed in a nozzle and defining a plurality of spray axes. A plurality of spark electrodes are resident on the nozzle and form spark gaps offset from the spray axes, in a spark gap pattern that is at variance in at least one of a circumferential aspect or an axial aspect with the spray plume pattern.
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