公开(公告)号：US09657675B1

公开(公告)日：2017-05-23

申请号：US15087990

申请日：2016-03-31

申请人： EtaGen, Inc.

发明人： Matthew Roelle ,  Christopher Gadda

IPC分类号： F02D41/14 ,  F02B71/04 ,  F02B63/04 ,  F02D35/02

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.

公开(公告)号：US20130167718A1

公开(公告)日：2013-07-04

申请号：US13725987

申请日：2012-12-21

申请人： Etagen, Inc.

发明人： Matt Svrcek ,  John Lawler ,  Shannon Miller

IPC分类号： F16J1/09 ,  F16J1/10

CPC分类号： F16J1/09

摘要： A piston engine may include a heat pipe capable of transferring heat away from a portion of the piston engine such as a combustion section. The heat pipe may be included as part of a piston assembly, a cylinder, or both. The heat pipe may be filled with a suitable heat pipe fluid that may undergo a phase change such as, for example, water, ethanol, ammonia, sodium, other fluids or combinations thereof. Boiling and condensing of the fluid within the heat pipe may utilize the latent heat of the fluid during heat transfer. Multiple heat pipes may be used in some instances.

摘要翻译： 活塞发动机可以包括能够从诸如燃烧部分的活塞发动机的一部分传递热量的热管。 热管可以包括作为活塞组件，气缸或两者的一部分。 热管可以填充有可能经历相变的合适的热管流体，例如水，乙醇，氨，钠，其它流体或其组合。 在热管内的流体的沸腾和冷凝可以在传热期间利用流体的潜热。 在某些情况下可以使用多个热管。

公开(公告)号：US10221759B2

公开(公告)日：2019-03-05

申请号：US16016393

申请日：2018-06-22

申请人： EtaGen, Inc.

发明人： Adam Simpson ,  Shannon Miller ,  Matt Svrcek

IPC分类号： F02B25/08 ,  F02B71/04 ,  H02K35/02 ,  F01B11/00 ,  F02B63/04 ,  F02B71/00 ,  F02B75/28 ,  H02K7/18 ,  F01B7/02 ,  F02B1/12

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.

公开(公告)号：US10215229B2

公开(公告)日：2019-02-26

申请号：US13830591

申请日：2013-03-14

申请人： EtaGen, Inc.

发明人： Matt Svrcek ,  Scott Coakley

IPC分类号： F16C29/02 ,  F01B23/10 ,  F16J1/06 ,  F02F3/00

摘要： An element is provided to maintain a clearance gap between a piston and a cylinder wall. In some embodiments, an element is included that is capable of spatial change. In some embodiments, the element is a component such as a clearance ring, a surface bearing, or a segment of a clearance ring or surface bearing. A clearance gap may be maintained by inward and outward motion of the component with respect to a piston assembly and a cylinder wall, where the motion is determined by a balance of forces acting on the component. In some embodiments, an inward force generated by an external gas pressure source is balanced by an outward preload force generated by, for example, a pneumatic piston. In some embodiments, a clearance gap is maintained based on in part on the ratio of inner to outer surface areas of a clearance ring.

公开(公告)号：US09567898B2

公开(公告)日：2017-02-14

申请号：US14964463

申请日：2015-12-09

申请人： EtaGen, Inc.

发明人： Adam Simpson ,  Shannon Miller ,  Matt Svrcek

IPC分类号： F02B63/04 ,  F02B25/08 ,  F02B71/04 ,  F01B11/00 ,  F02B71/00 ,  F01B7/02

CPC分类号： F02B71/04 ,  F01B7/02 ,  F01B11/001 ,  F01B11/007 ,  F02B1/12 ,  F02B25/08 ,  F02B63/041 ,  F02B71/00 ,  F02B75/282 ,  H02K7/1892 ,  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.

摘要翻译： 本发明的各种实施例涉及一种线性内燃机，包括：具有气缸壁和一对端部的气缸，所述气缸包括设置在气缸的中心部分的燃烧部分; 一对相对的活塞组件，其适于在气缸内线性地移动，每个活塞组件设置在与另一个活塞组件相对的燃烧部分的一侧上，每个活塞组件包括弹簧杆和活塞，活塞包括与燃烧部分相邻的实心前部 和气体部分; 以及适于将活塞组件的动能直接转换为电能并且适于将电能直接转换成活塞组件的动能以在压缩冲程期间提供压缩作用的一对线性电磁机器。

公开(公告)号：US20140130771A1

公开(公告)日：2014-05-15

申请号：US14160359

申请日：2014-01-21

申请人： EtaGen, Inc.

发明人： Adam Simpson ,  Shannon Miller ,  Matt Svrcek

IPC分类号： F02B71/00

CPC分类号： F02B71/04 ,  F01B7/02 ,  F01B11/001 ,  F01B11/007 ,  F02B1/12 ,  F02B25/08 ,  F02B63/041 ,  F02B71/00 ,  F02B75/282 ,  H02K7/1892 ,  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.

摘要翻译： 本发明的各种实施例涉及一种线性内燃机，包括：具有气缸壁和一对端部的气缸，所述气缸包括设置在气缸的中心部分的燃烧部分; 一对相对的活塞组件，其适于在气缸内线性地移动，每个活塞组件设置在与另一个活塞组件相对的燃烧部分的一侧上，每个活塞组件包括弹簧杆和活塞，活塞包括与燃烧部分相邻的实心前部 和气体部分; 以及适于将活塞组件的动能直接转换为电能并且适于将电能直接转换成活塞组件的动能以在压缩冲程期间提供压缩作用的一对线性电磁机器。

公开(公告)号：US08720317B2

公开(公告)日：2014-05-13

申请号：US13340534

申请日：2011-12-29

申请人： John Lawler ,  Matt Svrcek

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.

摘要翻译： 活塞发动机可以包括活塞组件和气缸之间的非接触轴承。 活塞可以被配置成在气缸的孔中平移，并且非接触轴承可以包括在活塞组件和孔之间的间隙中。 可以通过活塞组件和/或气缸将轴承流体供应到间隙，以产生非接触轴承。 轴承元件可用于引导或以其他方式管理间隙中的轴承流体的流动。 轴承元件可以包括一个或多个孔，多孔部分和/或将轴承流体引导到间隙的通道。

公开(公告)号：US08662029B2

公开(公告)日：2014-03-04

申请号：US13298206

申请日：2011-11-16

申请人： Adam Simpson ,  Shannon Miller ,  Matt Svrcek

发明人： Adam Simpson ,  Shannon Miller ,  Matt Svrcek

IPC分类号： F02B71/00

CPC分类号： F02B71/04 ,  F01B7/02 ,  F01B11/001 ,  F01B11/007 ,  F02B1/12 ,  F02B25/08 ,  F02B63/041 ,  F02B71/00 ,  F02B75/282 ,  H02K7/1892 ,  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.

摘要翻译： 本发明的各种实施例涉及一种线性内燃机，包括：具有气缸壁和一对端部的气缸，所述气缸包括设置在气缸的中心部分的燃烧部分; 一对相对的活塞组件，其适于在气缸内线性地移动，每个活塞组件设置在与另一个活塞组件相对的燃烧部分的一侧上，每个活塞组件包括弹簧杆和活塞，活塞包括与燃烧部分相邻的实心前部 和气体部分; 以及适于将活塞组件的动能直接转换为电能并且适于将电能直接转换成活塞组件的动能以在压缩冲程期间提供压缩作用的一对线性电磁机器。

公开(公告)号：US20130257336A1

公开(公告)日：2013-10-03

申请号：US13691527

申请日：2012-11-30

申请人： ETAGEN, INC.

发明人： Christopher David Gadda

IPC分类号： H02P25/22

CPC分类号： H02P25/22 ,  H02P6/006 ,  H02P6/34 ,  H02P25/06

摘要： A multiphase electromagnetic machine may be controlled by controlling currents in one or more phases of the multiphase electromagnetic machine. A control system may be used to determine how much current to deliver to, or extract from, each phase. The control system may use an objective function, subject to one or more constraints, to determine the current. The control system may use position information to determine the objective function, constraints, or both.

摘要翻译： 可以通过控制多相电磁机的一相或多相中的电流来控制多相电磁机。 可以使用控制系统来确定要递送到每个阶段或从每个阶段提取多少电流。 控制系统可以使用目标函数，受制于一个或多个约束来确定电流。 控制系统可以使用位置信息来确定目标函数，约束或两者。

公开(公告)号：US08453612B2

公开(公告)日：2013-06-04

申请号：US13102916

申请日：2011-05-06

申请人： Adam Simpson ,  Shannon Miller ,  Mark Svrcek

发明人： Adam Simpson ,  Shannon Miller ,  Mark Svrcek

IPC分类号： F02B71/00

CPC分类号： F02B71/04 ,  F01B11/002 ,  F02B63/041

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 hollow back section comprising a gas spring that directly provides at least some compression work during a compression stroke of the engine; 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; wherein the engine includes a variable expansion ratio greater than 50:1.

摘要翻译： 本发明的各种实施例涉及一种线性内燃机，包括：具有气缸壁和一对端部的气缸，所述气缸包括设置在气缸的中心部分的燃烧部分; 一对相对的活塞组件，其适于在气缸内线性地移动，每个活塞组件设置在与另一个活塞组件相对的燃烧部分的一侧上，每个活塞组件包括弹簧杆和活塞，活塞包括与燃烧部分相邻的实心前部 以及包括气弹簧的空心后部，所述气弹簧在发动机的压缩冲程期间直接提供至少一些压缩作用; 以及适于将活塞组件的动能直接转换为电能并且适于将电能直接转换成活塞组件的动能以在压缩冲程期间提供压缩作用的一对线性电磁机器; 其中所述发动机包括大于50:1的可变膨胀比。