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公开(公告)号：US20230101969A1
公开(公告)日：2023-03-30
申请号：US18077007
申请日：2022-12-07
发明人： Adam Simpson , Shannon Miller , Matt Svrcek
IPC分类号： F02B71/04 , F01B11/00 , F02B63/04 , F02B71/00 , F02B25/08 , F02B75/28 , H02K7/18 , H02K35/02
摘要： Various embodiments of the present invention are directed toward a linear combustion engine, comprising: a cylinder having a cylinder wall and a pair of ends, the cylinder including a combustion section disposed in a center portion of the cylinder; a pair of opposed piston assemblies adapted to move linearly within the cylinder, each piston assembly disposed on one side of the combustion section opposite the other piston assembly, each piston assembly including a spring rod and a piston comprising a solid front section adjacent the combustion section and a gas section; and a pair of linear electromagnetic machines adapted to directly convert kinetic energy of the piston assembly into electrical energy, and adapted to directly convert electrical energy into kinetic energy of the piston assembly for providing compression work during the compression stroke.
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公开(公告)号：US11616428B2
公开(公告)日：2023-03-28
申请号：US17226582
申请日：2021-04-09
发明人： John Lawler , John Powers , Scott Coakley , Alan Crapo , David DeGraaff , Christopher David Gadda , Andrew Hancock , Shannon Miller , Samuel Sherman , Matthew Svrcek , Kevin Walters
摘要： A linear electromagnetic machine includes a stator, a translator, and a bearing system. The bearing system maintains alignment against lateral displacement of the translator relative to the stator, as the translator reciprocates axially. More particularly, the bearing system maintains a motor air gap between the stator and a magnetic section of the translator. The stator includes a plurality of stator teeth and windings, which form a plurality of phases. The stator teeth and windings are arranged using a hoop stack with spines to form a stator bore and define the motor air gap. The bearing system can include bearing housings that are configured to form a bearing interface with a surface of the translator. The bearing interface can include a contact bearing or a non-contact bearing, such as a gas bearing. Current is controlled in the phases to convert between electrical energy and kinetic energy of the translator.
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公开(公告)号：US11352947B2
公开(公告)日：2022-06-07
申请号：US16920172
申请日：2020-07-02
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：US11339735B2
公开(公告)日：2022-05-24
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：US20210288570A1
公开(公告)日：2021-09-16
申请号：US17226582
申请日：2021-04-09
发明人： John Lawler , John Powers , Scott Coakley , Alan Crapo , David DeGraaff , Christopher David Gadda , Andrew Hancock , Shannon Miller , Samuel Sherman , Matthew Svrcek , Kevin Walters
摘要： A linear electromagnetic machine includes a stator, a translator, and a bearing system. The bearing system maintains alignment against lateral displacement of the translator relative to the stator, as the translator reciprocates axially. More particularly, the bearing system maintains a motor air gap between the stator and a magnetic section of the translator. The stator includes a plurality of stator teeth and windings, which form a plurality of phases. The stator teeth and windings are arranged using a hoop stack with spines to form a stator bore and define the motor air gap. The bearing system can include bearing housings that are configured to form a bearing interface with a surface of the translator. The bearing interface can include a contact bearing or a non-contact bearing, such as a gas bearing. Current is controlled in the phases to convert between electrical energy and kinetic energy of the translator.
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公开(公告)号：US20230072947A1
公开(公告)日：2023-03-09
申请号：US17988048
申请日：2022-11-16
发明人： Matt Svrcek , Jodie Prudhomme
IPC分类号： F04B1/00 , F16J1/09 , F15B15/00 , F16F9/36 , F04B1/0448 , F16J9/16 , F16J9/22 , F16J9/28 , F16J15/34
摘要： A sealing ring includes a first sealing element having a first mating surface and a second sealing element having a second mating surface. A high-pressure boundary extends across at least a portion of the first sealing element and across at least a portion of the second sealing element, and a low-pressure boundary extends across at least a portion of the first sealing element and across at least a portion of the second sealing element. The first mating surface, the second mating surface, or both, includes a recess open to the low-pressure boundary and not open to the high-pressure boundary. The recess may include a groove, for example. The first mating surface is sealed against the second mating surface by a first force acting on the first sealing element and a second force acting on the second sealing element. These forces act to pressure-lock the assembly.
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公开(公告)号：US20230034504A1
公开(公告)日：2023-02-02
申请号：US17876992
申请日：2022-07-29
发明人： John Lawler , Neil Watters , Samuel Sherman , Matthew Svrcek , David DeGraaff
摘要： A bearing assembly for a linear electromagnetic machine includes a sleeve having a surface configured to provide a bearing between the surface and a translator, a front plate coupled to the sleeve, a support block, and a plurality of flexures coupled to the support block. Each flexure is coupled between the support block and one of the front plate or a stator. For example, a load path extends from a stator to the support block via a first set of flexures of the plurality of flexures, from the support block to the front plate via a second set of flexures of the plurality of flexures, and from the front plate to the sleeve. In the example of four flexures, two flexures are affixed to the support block and front plate, while two other flexures are affixed to the support block and the stator.
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公开(公告)号：US20220356948A1
公开(公告)日：2022-11-10
申请号：US17733228
申请日：2022-04-29
发明人： Matt Svrcek , Jodie Prudhomme
IPC分类号： F16J9/16
摘要： The present disclosure provides a sealing ring assembly having a first ring and a second ring, configured to seal a high-pressure region from a lower pressure region of a piston and cylinder device. Accordingly, the sealing ring assembly includes a high-pressure boundary and a low-pressure boundary. Each ring may be segmented, and the first and second rings interface along a surface. Along the surface at the interface, a groove open to the lower pressure region aids in pressure locking the sealing ring assembly. A pocket in the second ring allows for high pressure gas to aid in balancing radial forces on the sealing ring assembly. As the sealing ring wears, the first and second rings remain engaged with one another.
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公开(公告)号：US11346445B2
公开(公告)日：2022-05-31
申请号：US16561846
申请日：2019-09-05
发明人： Matt Svrcek , Jodie Prudhomme
摘要： The present disclosure provides a sealing ring assembly having a first ring and a second ring, configured to seal a high-pressure region from a lower pressure region of a piston and cylinder device. Accordingly, the sealing ring assembly includes a high-pressure boundary and a low-pressure boundary. Each ring may be segmented, and the first and second rings interface along a surface. Along the surface at the interface, a groove open to the lower pressure region aids in pressure locking the sealing ring assembly. A pocket in the second ring allows for high pressure gas to aid in balancing radial forces on the sealing ring assembly. As the sealing ring wears, the first and second rings remain engaged with one another.
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公开(公告)号：US20210388901A1
公开(公告)日：2021-12-16
申请号：US17226566
申请日：2021-04-09
发明人： Jodie Prudhomme , Matt Svrcek
摘要： The present disclosure provides a sealing ring assembly having a ring and one or more gap cover elements, configured to seal a high-pressure region from a lower pressure region of a piston and cylinder device. The ring may be segmented, and the gap cover elements may engage with interfaces between the ring segments. The gap cover elements are configured to move radially outward and wear as the ring wears. The gap cover elements may include, for example, wedge-shaped features that engage with corresponding wedge recesses in the interfaces. The sealing ring assembly may include a high-pressure boundary and a low-pressure boundary. As the sealing ring wears, the gap cover elements stay engaged with the interfaces, so that ring gaps do not form on the low pressure boundary.
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