公开(公告)号：US20200284149A1

公开(公告)日：2020-09-10

申请号：US16884266

申请日：2020-05-27

Applicant: Aquarius Engines (A.M.) Ltd.

Inventor： Shaul Haim YAAKOBY

IPC: 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

Abstract: 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.

公开(公告)号：US20200271071A1

公开(公告)日：2020-08-27

申请号：US16874322

申请日：2020-05-14

Applicant: Mainspring Energy, Inc.

Inventor： Matt Svrcek

IPC: F02F3/28 ,  F16J1/09 ,  F16J9/08 ,  F02B71/00 ,  F16J1/00 ,  F16J9/12

Abstract: 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.

公开(公告)号：US10738688B2

公开(公告)日：2020-08-11

申请号：US16239344

申请日：2019-01-03

Applicant: EtaGen, Inc.

Inventor： Christopher Gadda ,  Matthew Roelle ,  Adam Simpson

IPC: F02B71/04 ,  H02K7/18 ,  F02B71/00 ,  F02B63/04

Abstract: 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.

公开(公告)号：US10669969B2

公开(公告)日：2020-06-02

申请号：US16452500

申请日：2019-06-25

Applicant: EtaGen, Inc.

Inventor： Matt Svrcek

IPC: F16J1/09 ,  F16J9/08 ,  F02B71/00 ,  F02F3/28 ,  F16J1/00 ,  F16J9/12

Abstract: 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.

公开(公告)号：US10156198B2

公开(公告)日：2018-12-18

申请号：US15489657

申请日：2017-04-17

Applicant: EtaGen, Inc.

Inventor： Matthew Roelle ,  Christopher Gadda

IPC: F02D41/14 ,  F02B71/04 ,  F02B63/04 ,  F02D35/02 ,  F02D41/00 ,  F02B71/00 ,  F01B11/00

Abstract: 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：US09957958B2

公开(公告)日：2018-05-01

申请号：US14964820

申请日：2015-12-10

Applicant: Southwest Research Institute

Inventor： Danny M. Deffenbaugh

IPC: F02B71/00 ,  F02B75/18 ,  F04B35/00 ,  F04B39/00 ,  F04B39/10 ,  F04B39/12 ,  F04B27/12 ,  F02B23/08 ,  F02B33/02 ,  F02B25/26 ,  F02D23/00

CPC classification number: F04B35/002 ,  F02B23/08 ,  F02B25/26 ,  F02B33/02 ,  F02D23/005 ,  F04B27/005 ,  F04B27/12 ,  F04B31/00 ,  F04B39/0022 ,  F04B39/10 ,  F04B39/12 ,  Y02T10/125

Abstract: A reciprocating compressor. A hollow cylinder tube contains a piston assembly having two pistons connected by a piston rod. At each end of the cylinder tube is an outer chamber between an end plate and an outer end of the proximate piston. These two outer chambers and the outer ends of the pistons define a power cylinder at each end of the cylinder tube. In the mid-portion of the cylinder tube, a center divider is situated between the pistons and has an aperture that allows the piston rod to reciprocate through it. The two inner chambers formed thereby and the inner ends of the pistons define two compression cylinders in the mid-portion of the cylinder tube. The two compression chambers share a suction manifold and a discharge manifold, but have independently operating suction and discharge valves.

公开(公告)号：US09869258B2

公开(公告)日：2018-01-16

申请号：US15007077

申请日：2016-01-26

Applicant: Achates Power, Inc.

Inventor： Eric P. Dion

IPC: F02B33/44 ,  F02M25/07 ,  F02B71/00 ,  F02B75/04 ,  F02D41/00 ,  F02B47/08 ,  F02M26/34 ,  F02M26/23 ,  F02M26/05 ,  F02B25/08 ,  F02B75/28 ,  F02B37/04 ,  F02B37/10 ,  F02B39/10 ,  F02B25/06 ,  F02B37/02 ,  F02M26/08 ,  F01B7/02 ,  F02B75/02 ,  F02B29/04

CPC classification number: F02D41/0077 ,  F01B7/02 ,  F02B25/06 ,  F02B25/08 ,  F02B29/0406 ,  F02B37/02 ,  F02B37/04 ,  F02B37/10 ,  F02B39/10 ,  F02B47/08 ,  F02B75/02 ,  F02B75/28 ,  F02B2075/025 ,  F02B2275/14 ,  F02D41/0007 ,  F02M26/05 ,  F02M26/08 ,  F02M26/23 ,  F02M26/34 ,  Y02T10/121 ,  Y02T10/144

Abstract: A two-stroke cycle, turbo-driven, opposed-piston engine with one or more ported cylinders and uniflow scavenging has no supercharger. The engine includes a high pressure EGR loop and a pump in the EGR loop to boost the pressure of the recirculated exhaust products.

公开(公告)号：US09856821B1

公开(公告)日：2018-01-02

申请号：US15294438

申请日：2016-10-14

Applicant: EtaGen, Inc.

Inventor： Matt Svrcek

IPC: F02F3/28 ,  F16J1/00 ,  F16J9/12 ,  F02B71/00

CPC classification number: F02F3/28 ,  F02B71/00 ,  F16J1/001 ,  F16J1/09 ,  F16J9/08 ,  F16J9/12

Abstract: 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.

公开(公告)号：US09845680B2

公开(公告)日：2017-12-19

申请号：US15210596

申请日：2016-07-14

Applicant: Aquarius Engines (A.M.) Ltd.

Inventor： Shaul Haim Yaakoby

IPC: F02B41/00 ,  F01B11/00 ,  F02B71/00 ,  F02B75/00 ,  F16J1/12 ,  F16J9/12 ,  F16J1/00 ,  F01N13/10 ,  F02F1/00 ,  F02F1/06 ,  F02F1/24 ,  F02F3/00 ,  F02M35/10 ,  F02M61/14 ,  F16J7/00 ,  F02F1/22 ,  F01L7/02 ,  F02F3/28 ,  F16J9/06 ,  F16J9/20 ,  F02B71/04

CPC classification number: F01B11/001 ,  F01B7/20 ,  F01L7/02 ,  F01N3/26 ,  F01N13/10 ,  F02B1/04 ,  F02B3/06 ,  F02B71/00 ,  F02B71/04 ,  F02B75/002 ,  F02B75/30 ,  F02F1/00 ,  F02F1/06 ,  F02F1/22 ,  F02F1/24 ,  F02F3/0015 ,  F02F3/28 ,  F02M35/1015 ,  F02M61/14 ,  F16J1/005 ,  F16J1/008 ,  F16J1/12 ,  F16J7/00 ,  F16J9/06 ,  F16J9/12 ,  F16J9/20

Abstract: A linear reciprocating engine 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 engine may further include a first piston rod portion extending from a first face of the double-faced piston through the first combustion chamber, and a second piston rod portion extending from a second face of the piston through the second combustion chamber. Passageways in the piston rod portions may be configured to communicate gases between the combustion chamber and a location outside the cylinder and configured to prevent gases from being exchanged between the cylinder and a location outside the cylinder via a path that crosses both face of the piston.

公开(公告)号：US09719415B2

公开(公告)日：2017-08-01

申请号：US14598173

申请日：2015-01-15

Applicant: EtaGen, Inc.

Inventor： Christopher Gadda ,  Matthew Roelle ,  Adam Simpson

IPC: F02B71/04 ,  F02B63/04 ,  H02K7/18 ,  F02B71/00

CPC classification number: F02B71/04 ,  F02B63/041 ,  F02B71/00 ,  H02K7/1884

Abstract: 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.