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11. 发明申请

US20190063357A1 CONTROL OF PISTON TRAJECTORY IN A FREE-PISTON COMBUSTION ENGINE 审中-公开
公开(公告)号：US20190063357A1
公开(公告)日：2019-02-28
申请号：US16175358
申请日：2018-10-30
申请人： EtaGen, Inc.
发明人： Matthew Roelle , Christopher Gadda
IPC分类号： F02D41/14 , F02D35/02 , F01B11/00 , F02B71/00 , F02B71/04 , F02B63/04 , F02D41/00
CPC分类号： F02D41/1497 , F01B11/00 , F02B63/04 , F02B71/00 , F02B71/04 , F02D35/023 , F02D35/024 , F02D41/009
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.

12. 发明申请

US20190049009A1 PISTON SEALING RING ASSEMBLIES 审中-公开
公开(公告)号：US20190049009A1
公开(公告)日：2019-02-14
申请号：US16100092
申请日：2018-08-09
申请人： EtaGen, Inc.
发明人： Matt Svrcek , Jodie Prudhomme
IPC分类号： F16J9/16
CPC分类号： F16J9/16 , F16J9/26
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.

13. 发明申请

US20190049008A1 PISTON-INTEGRATED GAP COVER 审中-公开
公开(公告)号：US20190049008A1
公开(公告)日：2019-02-14
申请号：US16060000
申请日：2018-08-09
申请人： EtaGen, Inc.
发明人： Matt Svrcek , David Degraaff
IPC分类号： F16J9/16 , F16J15/34
摘要： The present disclosure provides a sealing ring assembly with one or more piston-integrated gap cover features, configured to seal a high-pressure region from a relatively lower pressure region of a piston and cylinder device. The sealing ring assembly may include two rings which each may include one or more ring segments. The one or more gap-cover features, which may be in the form of protrusions in the piston ring groove, may engage with corresponding flat sections of the ring segments. As the sealing ring wears, the gap-cover features may stay engaged with the ring segments, thereby maintaining a seal.

14. 发明授权

US10190490B2 Energy storage and conversion in free-piston combustion engines 有权
公开(公告)号：US10190490B2
公开(公告)日：2019-01-29
申请号：US15645995
申请日：2017-07-10
申请人： EtaGen, Inc.
发明人： Christopher Gadda , Matthew Roelle , Adam Simpson
IPC分类号： F02B71/04 , F02B63/04 , H02K7/18 , F02B71/00
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.

15. 发明申请

US20160208686A1 ENERGY STORAGE AND CONVERSION IN FREE-PISTON COMBUSTION ENGINES 有权
标题翻译：自由活塞式发动机的能源储存和转换
公开(公告)号：US20160208686A1
公开(公告)日：2016-07-21
申请号：US14598173
申请日：2015-01-15
申请人： EtaGen, Inc.
发明人： Christopher Gadda , Matthew Roelle , Adam Simpson
IPC分类号： F02B71/04 , F02B63/04
CPC分类号： F02B71/04 , F02B63/041 , F02B71/00 , H02K7/1884
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.
摘要翻译：本公开的各种实施例涉及自由活塞内燃发动机。如本文所述，驱动器部分可以设置在自由活塞式内燃机中，用于在膨胀冲程期间储存能量。驱动器部分可以被配置为存储足够的能量以执行后续的冲程。在一些实施例中，驱动器部分可以被配置为存储足够的能量，以使得发动机能够在没有电能输入的情况下在发动机循环中连续运行。可以在自由活塞式内燃机中设置线性电磁机器，以将活塞组件的动能转换为电能。

16. 发明授权

US08770090B2 Methods and systems for managing a clearance gap in a piston engine 有权
公开(公告)号：US08770090B2
公开(公告)日：2014-07-08
申请号：US13725984
申请日：2012-12-21
申请人： Etagen, Inc.
发明人： John Lawler , Matt Svrcek
IPC分类号： F01B23/10
CPC分类号： F02F1/00 , F02F1/004 , F02F3/00 , F16J1/02 , F16J1/09 , F16J10/02
摘要： A piston engine may include a non-contact bearing between a piston assembly and a cylinder. The piston may be configured to translate in a bore of the cylinder, and a non-contact bearing may be included in a clearance gap between the piston assembly and the bore. A bearing fluid may be supplied to the clearance gap via the piston assembly and/or cylinder to create the non-contact bearing. A bearing element may be used to direct or otherwise manage the flow of bearing fluid in the clearance gap. The bearing element may include one or more holes, porous portions, and/or passages to direct the bearing fluid to the clearance gap.

17. 发明申请

US20130167796A1 METHODS AND SYSTEMS FOR MANAGING A CLEARANCE GAP IN A PISTON ENGINE 有权
标题翻译：用于管理活塞发动机间隙的方法和系统
公开(公告)号：US20130167796A1
公开(公告)日：2013-07-04
申请号：US13725988
申请日：2012-12-21
申请人： Etagen, Inc.
发明人： John Lawler , Matt Svrcek
IPC分类号： F02F1/18
CPC分类号： F02F1/18 , F01B11/02 , F01P3/06 , F02B71/04 , F16J1/09 , F16J10/02
摘要： A piston engine may include a clearance gap between a piston assembly and a cylinder. The piston may be configured to translate in a bore of the cylinder. The clearance gap between the piston assembly and the bore may be actively or passively controlled. A control system may provide one or more adjustments based on, for example, a detected temperature, pressure, flow rate, work metric, and/or other indicator. The adjustments may include, for example, adjusting a cylinder liner, adjusting a flow through a bearing element, adjusting a coolant flow, adjusting a heat pipe property, and/or other adjustments. One or more auxiliary systems may be used to provide the adjustments.
摘要翻译：活塞发动机可以包括活塞组件和气缸之间的间隙。活塞可以构造成在气缸的孔中平移。活塞组件和孔之间的间隙可以被主动地或被动地控制。控制系统可以基于例如检测到的温度，压力，流量，工作量度和/或其他指示器来提供一个或多个调整。调节可以包括例如调节气缸套，调节通过轴承元件的流量，调节冷却剂流量，调节热管性能和/或其他调节。可以使用一个或多个辅助系统来提供调整。

18. 发明申请

US20130167795A1 METHODS AND SYSTEMS FOR MANAGING A CLEARANCE GAP IN A PISTON ENGINE 有权
公开(公告)号：US20130167795A1
公开(公告)日：2013-07-04
申请号：US13725984
申请日：2012-12-21
申请人： Etagen, Inc.
发明人： John Lawler , Matt Svrcek
IPC分类号： F02F1/00 , F02F1/04
CPC分类号： F02F1/00 , F02F1/004 , F02F3/00 , F16J1/02 , F16J1/09 , F16J10/02
摘要： A piston engine may include a non-contact bearing between a piston assembly and a cylinder. The piston may be configured to translate in a bore of the cylinder, and a non-contact bearing may be included in a clearance gap between the piston assembly and the bore. A bearing fluid may be supplied to the clearance gap via the piston assembly and/or cylinder to create the non-contact bearing. A bearing element may be used to direct or otherwise manage the flow of bearing fluid in the clearance gap. The bearing element may include one or more holes, porous portions, and/or passages to direct the bearing fluid to the clearance gap.

19. 发明授权

US10985641B2 Linear electromagnetic machine system with bearing housings having pressurized gas 有权
公开(公告)号：US10985641B2
公开(公告)日：2021-04-20
申请号：US16521541
申请日：2019-07-24
申请人： EtaGen, Inc.
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
IPC分类号： H02K33/18 , H02K7/08 , F16C32/06 , F02B71/04 , H02K7/18
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.

20. 发明授权

US10738688B2 Energy storage and conversion in free-piston combustion engines 有权
公开(公告)号：US10738688B2
公开(公告)日：2020-08-11
申请号：US16239344
申请日：2019-01-03
申请人： EtaGen, Inc.
发明人： Christopher Gadda , Matthew Roelle , Adam Simpson
IPC分类号： F02B71/04 , H02K7/18 , F02B71/00 , F02B63/04
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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