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公开(公告)号：US11578646B2
公开(公告)日：2023-02-14
申请号：US17734350
申请日：2022-05-02
发明人： Christopher Gadda , Matthew Roelle , Adam Simpson
摘要： Various embodiments of the present disclosure are directed towards free-piston combustion engines. As described herein, a driver section may be provided in a free-piston combustion engine for storing energy during an expansion stroke. The driver section may be configured to store sufficient energy to perform the subsequent stroke. In some embodiments, the driver section may be configured to store sufficient energy so as to enable the engine to operate continuously across engine cycles without electrical energy input. A linear electromagnetic machine may be provided in a free-piston combustion engine for converting the kinetic energy of a piston assembly into electrical energy.
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公开(公告)号：US20220364502A1
公开(公告)日：2022-11-17
申请号：US17734350
申请日：2022-05-02
发明人： Christopher Gadda , Matthew Roelle , Adam Simpson
摘要： Various embodiments of the present disclosure are directed towards free-piston combustion engines. As described herein, a driver section may be provided in a free-piston combustion engine for storing energy during an expansion stroke. The driver section may be configured to store sufficient energy to perform the subsequent stroke. In some embodiments, the driver section may be configured to store sufficient energy so as to enable the engine to operate continuously across engine cycles without electrical energy input. A linear electromagnetic machine may be provided in a free-piston combustion engine for converting the kinetic energy of a piston assembly into electrical energy.
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公开(公告)号：US20220282620A1
公开(公告)日：2022-09-08
申请号：US17825928
申请日：2022-05-26
发明人： Shaul Haim YAAKOBY
IPC分类号： F01B11/00 , F01L7/02 , F01N13/10 , F02B71/00 , F02B71/04 , F02B75/00 , F02F1/00 , F02F1/06 , F02F1/22 , F02F1/24 , F02F3/00 , F02F3/28 , F02M35/10 , F02M61/14 , F16J1/00 , F16J1/12 , F16J7/00 , F16J9/06 , F16J9/12 , F16J9/20
摘要： An internal combustion may include a cylinder having a first combustion chamber at one end and a second combustion chamber at an opposing end, first and second cylinder heads located at an end of the first and second combustion chambers, respectively, and a double-faced piston slidably mounted therein. The piston may be configured to move in a first stroke that includes an expansion stroke portion and a non-expansion stroke portion. The engine may further include first and second piston rod portions extending from opposite faces of the piston. A recess in the piston rod portions may be configured to communicate gases between a combustion chamber and locations outside the cylinder. There may also be a chamber surrounding the first or second piston rod portion, the chamber configured to be supplied with gas and the chamber being isolated from the first combustion chamber and the second combustion chamber.
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公开(公告)号：US11313318B2
公开(公告)日：2022-04-26
申请号：US16874322
申请日：2020-05-14
发明人： Matt Svrcek
摘要： The present disclosure provides an open-faced piston with a circumferential groove into which a piston ring assembly is arranged. Openings at the bottom of the circumferential groove and between a front land of the open-faced piston and the piston face are provided. The openings are arranged to allow for a combustion reaction to propagate through the volume defined between the bottom of the piston ring assembly and the piston face such that at least a portion of an air and fuel mixture located in that volume is reacted.
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公开(公告)号：US20210324812A1
公开(公告)日：2021-10-21
申请号：US17350224
申请日：2021-06-17
发明人： Matthew Roelle , Christopher Gadda
摘要： Various embodiments of the present disclosure are directed towards free-piston combustion engines. As described herein, a method and system are provided for displacing a free-piston assembly to achieve a desired engine performance by repeatedly determining position-force trajectories over the course of a propagation path and effecting the displacement of the free-piston assembly based, at least in part, on the position-force trajectory. In a dual-piston assembly free-piston engine, synchronization of the two piston assemblies is provided.
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公开(公告)号：US20210189954A1
公开(公告)日：2021-06-24
申请号：US17195818
申请日：2021-03-09
发明人： Shaul Haim YAAKOBY
摘要： An internal combustion engine may include an engine block, a cylinder defining at least one combustion chamber, and a piston in the cylinder. The piston may travel in a first stroke from one end to an opposite end of the cylinder, and may be sized relative to the cylinder to enable an expansion stroke portion of the first stroke while the piston travels under gas expansion pressure, and a momentum stroke portion of the first stroke for the remainder of the first stroke following the expansion stroke portion. A passageway may be formed in the piston rod to communicate gas flow between a first combustion chamber and an area external to the cylinder when the piston is in a first position, and to communicate gas flow between a second combustion chamber and an area external to the cylinder when the piston is in a second position.
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公开(公告)号：US20210010437A1
公开(公告)日：2021-01-14
申请号：US16910673
申请日：2020-06-24
发明人： Matthew Roelle , Christopher Gadda
摘要： Various embodiments of the present disclosure are directed towards free-piston combustion engines. As described herein, a method and system are provided for displacing a free-piston assembly to achieve a desired engine performance by repeatedly determining position-force trajectories over the course of a propagation path and effecting the displacement of the free-piston assembly based, at least in part, on the position-force trajectory. In a dual-piston assembly free-piston engine, synchronization of the two piston assemblies is provided.
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公开(公告)号：US10815878B2
公开(公告)日：2020-10-27
申请号：US15915877
申请日：2018-03-08
申请人： The Government of the United States of America, as represented by the Secretary of Homeland Security
IPC分类号： F02B63/04 , F02D13/02 , F02D41/14 , F02D41/30 , F02B75/24 , F02N11/04 , H02K7/18 , H02P9/04 , F01B11/00 , H02P25/06 , F02B71/00 , F01B11/02 , H02P9/00 , F02M25/03 , F02B1/14 , F02B75/18 , F02D41/00 , F02B47/02 , F02D41/34 , F02M25/025 , F02D15/00
摘要： A homogeneous charge compression ignition free-piston linear generator is disclosed. The linear generator includes a housing having cylinders at opposite ends. A double-ended piston assembly is to move linearly in the housing to convert kinetic energy of the piston assembly into electrical energy, and to enable conversion of electrical energy into kinetic energy of the piston assembly. Sensors measure one or more states of the cylinders and/or piston assembly, and a controller controls the linear generator based on the sensor data.
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公开(公告)号：US20200284149A1
公开(公告)日：2020-09-10
申请号：US16884266
申请日：2020-05-27
发明人： Shaul Haim YAAKOBY
IPC分类号： F01B11/00 , F02B71/00 , F02B75/00 , F16J1/12 , F16J9/12 , F16J1/00 , F16J9/20 , F02B71/04 , F01N13/10 , F02F1/00 , F02F1/06 , F02F1/24 , F02F3/00 , F02M35/10 , F02M61/14 , F16J7/00 , F02F1/22 , F01L7/02 , F02F3/28 , F16J9/06
摘要： An internal combustion may include a cylinder having a first combustion chamber at one end and a second combustion chamber at an opposing end, first and second cylinder heads located at an end of the first and second combustion chambers, respectively, and a double-faced piston slidably mounted within the cylinder. The piston may be configured to move in the cylinder in a first stroke from one end to another. The first stroke may include an expansion stroke portion and a non-expansion stroke portion. The non-expansion stroke portion may include a momentum stroke portion. The non-expansion stroke portion may include a scavenging phase. The engine may further include first and second piston rod portions extending from opposite faces of the piston. Passageways in the piston rod portions may be configured to communicate gases between a combustion chamber and other locations.
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公开(公告)号：US20200271071A1
公开(公告)日：2020-08-27
申请号：US16874322
申请日：2020-05-14
发明人： Matt Svrcek
摘要： The present disclosure provides an open-faced piston with a circumferential groove into which a piston ring assembly is arranged. Openings at the bottom of the circumferential groove and between a front land of the open-faced piston and the piston face are provided. The openings are arranged to allow for a combustion reaction to propagate through the volume defined between the bottom of the piston ring assembly and the piston face such that at least a portion of an air and fuel mixture located in that volume is reacted.
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