DE102007056527A1 - Low-emission internal combustion engine, has low-emission counter piston-two-stroke engine or emission-free formed single-piston engine of two or four-stroke design equipped with machines and/or pumps arranged directly to drive piston - Google Patents
Low-emission internal combustion engine, has low-emission counter piston-two-stroke engine or emission-free formed single-piston engine of two or four-stroke design equipped with machines and/or pumps arranged directly to drive piston Download PDFInfo
- Publication number
- DE102007056527A1 DE102007056527A1 DE102007056527A DE102007056527A DE102007056527A1 DE 102007056527 A1 DE102007056527 A1 DE 102007056527A1 DE 102007056527 A DE102007056527 A DE 102007056527A DE 102007056527 A DE102007056527 A DE 102007056527A DE 102007056527 A1 DE102007056527 A1 DE 102007056527A1
- Authority
- DE
- Germany
- Prior art keywords
- piston
- low
- emission
- stroke
- engine
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
- 238000002485 combustion reaction Methods 0.000 title claims description 17
- 238000013461 design Methods 0.000 title abstract description 5
- 230000001360 synchronised effect Effects 0.000 claims abstract description 3
- 230000006835 compression Effects 0.000 claims description 6
- 238000007906 compression Methods 0.000 claims description 6
- 238000013016 damping Methods 0.000 claims description 6
- 239000003344 environmental pollutant Substances 0.000 claims description 4
- 230000008030 elimination Effects 0.000 claims 1
- 238000003379 elimination reaction Methods 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 238000011010 flushing procedure Methods 0.000 description 7
- 239000000463 material Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000010926 purge Methods 0.000 description 3
- 231100000719 pollutant Toxicity 0.000 description 2
- BUHVIAUBTBOHAG-FOYDDCNASA-N (2r,3r,4s,5r)-2-[6-[[2-(3,5-dimethoxyphenyl)-2-(2-methylphenyl)ethyl]amino]purin-9-yl]-5-(hydroxymethyl)oxolane-3,4-diol Chemical compound COC1=CC(OC)=CC(C(CNC=2C=3N=CN(C=3N=CN=2)[C@H]2[C@@H]([C@H](O)[C@@H](CO)O2)O)C=2C(=CC=CC=2)C)=C1 BUHVIAUBTBOHAG-FOYDDCNASA-N 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000000567 combustion gas Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000002000 scavenging effect Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B71/00—Free-piston engines; Engines without rotary main shaft
- F02B71/04—Adaptations of such engines for special use; Combinations of such engines with apparatus driven thereby
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B25/00—Engines characterised by using fresh charge for scavenging cylinders
- F02B25/02—Engines characterised by using fresh charge for scavenging cylinders using unidirectional scavenging
- F02B25/04—Engines having ports both in cylinder head and in cylinder wall near bottom of piston stroke
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B25/00—Engines characterised by using fresh charge for scavenging cylinders
- F02B25/02—Engines characterised by using fresh charge for scavenging cylinders using unidirectional scavenging
- F02B25/08—Engines with oppositely-moving reciprocating working pistons
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B75/00—Other engines
- F02B75/02—Engines characterised by their cycles, e.g. six-stroke
- F02B2075/022—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle
- F02B2075/025—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle two
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B63/00—Adaptations of engines for driving pumps, hand-held tools or electric generators; Portable combinations of engines with engine-driven devices
- F02B63/04—Adaptations of engines for driving pumps, hand-held tools or electric generators; Portable combinations of engines with engine-driven devices for electric generators
- F02B63/041—Linear electric generators
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Reciprocating Pumps (AREA)
Abstract
Description
Die Erfindung betrifft einen schadstoffarmen Verbrennungsmotor mit direkt gekoppelten Linearmaschinen und/oder Kolbenpumpen, der als Freikolbenmaschine zur Erzeugung von Elektroenergie und/oder Druckluft oder Drucköl dient und wobei die aus dem Verbrennungsprozess anfallende Wärme zu Heizzwecken benutzt werden kann, wenn die erfindungsgemäße Einrichtung beispielsweises als Blockheizkraftwerk genutzt wird.The The invention relates to a low-emission internal combustion engine with direct coupled linear machines and / or piston pumps, as a free piston machine for generating electrical energy and / or compressed air or pressurized oil serves and wherein the heat arising from the combustion process can be used for heating purposes, when the inventive Device is used for example as a combined heat and power plant.
Freikolbenmaschinen
in klassischer Bauweise als Viertakt- oder Zweitaktmotoren sind
in vielen Ausführungen bekannt. Ebenso so mannigfaltig
vorgeschlagen werden Freikolbenmaschinen mit gegenläufigen
Freikolben, also Gegenkolbenmotoren, bei denen beispielsweise nach
Die vielfältig vorgeschlagenen Maschinen haben folgende entscheidende Nachteile:
- – Die immer höheren Anforderungen an einen schadstoffarmen Betrieb können die heutigen Verbrennungsmotoren zukünftig nicht mehr erfüllen. Bei Viertaktmotoren entstehen aus dem Ölfilm an der Zylinderwandung durch Vermischung mit dem Kraftstoff bis zu 30% der HC-Emissionen, bei Zweitaktmotoren werden außerdem Partikel aus den Auslassschlitzen ausgestoßen.
- – Der Einsatz solcher Maschinen, z. B. als Blockheizkraftwerk, verlangt eine sehr hohe Lebensdauer bis zu 30000 Betriebsstunden und noch darüber. Bei schnelllaufenden Viertaktmotoren treten hierbei Störungen besonders am Ventilsystem auf, bei Zweitaktmotoren sind solche Laufzeiten wegen der schlechten Schmierverhältnisse noch weniger möglich.
- - The ever-increasing requirements for low-emission operation can no longer be met by today's combustion engines. In four-stroke engines, up to 30% of the HC emissions are produced from the oil film on the cylinder wall by mixing with the fuel. In the case of two-stroke engines, particles are also ejected from the outlet slots.
- - The use of such machines, eg. B. as a combined heat and power plant, requires a very long life up to 30,000 operating hours and even more. In high-speed four-stroke engines this disturbances occur particularly on the valve system, in two-stroke engines such maturities are even less possible because of the poor lubrication conditions.
Der Erfindung liegt die Aufgabe zugrunde, das System Verbrennungsmotor-Linearmaschine/Kolbenpumpe hochgradig schadstoffarm, mit langer Betriebslaufzeit und geringen Fertigungskosten auszuführen.Of the Invention is based on the object, the system internal combustion engine linear machine / piston pump Highly pollutant, with long service life and low Execute manufacturing costs.
Diese
Aufgabe wird erfindungsgemäß dadurch gelöst,
dass der "Schadstoffarme Gegenkolben-Zweitaktmotor" nach
Weitere erfindungsgemäße Merkmale sind in den Patentansprüchen 2. bis 7. dargelegt.Further inventive features are in the claims 2. to 7. set out.
Dabei
ist es auch möglich, die erfindungsgemäßen
Mittel des
Wie genannt, ist es erfindungsgemäß vorgesehen, zusätzlich zu den Linearmaschinen hydraulische oder pneumatische 70 Kolbenpumpen mit den Arbeitskolben zu koppeln, so dass ein solches System neben Elektroenergie einen hydraulischen Druckstrom oder Druckluft erzeugt. Dabei kann das hydraulische System beispielsweise auch zur Endlagendämpfung in den Totlagen der Arbeitskolben dienen.As called, it is provided according to the invention, in addition to the linear machines hydraulic or pneumatic 70 piston pumps Pair with the power pistons so that such a system next to Electric power generated a hydraulic pressure stream or compressed air. In this case, the hydraulic system, for example, for cushioning serve in the dead positions of the working piston.
Die Erfindung wird nachstehend an mehreren Ausführungsbeispielen dargestellt.The The invention will be described below in several embodiments shown.
Die Zeichnungen zeigen:The Drawings show:
In
der
Die
Sie
besteht aus dem Stator
Diese
Dämpfungselemente
Die
dargestellte Hälfte des Rumpfmotors
Den
Merkmalen des
Die
Nach
dem von der Linearmaschine
Im
Arbeitshub wird vom Arbeitskolben
Die
Die
Die
in
Die
Auf
der Kolbenstange
Beim
Bewegen von Kolbenstange
Auf
der rechten Seite in
Auf
der linken Seite ist dieser hydraulische Anschlag verstellbar ausgebildet.
Eine Schiebehülse
Mit
einer axialen Verstellung der Schiebehülse
Die
Schiebehülse
Die
hydraulischen Anschläge des Hydraulikkolbens
Wie
die Linearmaschinen
- 11
- Rumpfmotorshort block
- 22
- Linearmaschinelinear machine
- 33
- Kolbenpumpe/KolbenpumpensystemPiston pump / piston pump system
- 44
- Zylindercylinder
- 55
- Arbeitskolbenworking piston
- 66
- Kolbenstangepiston rod
- 77
- Führungsbüchseguide bush
- 88th
- Deckelcover
- 99
- Statorstator
- 1010
- Ankeranchor
- 1111
- Dämpfungselementdamping element
- 1212
- Spülbohrungenflushing holes
- 1313
- Zylinderdeckelcylinder cover
- 1414
- Auslassventiloutlet valve
- 1515
- Spül- und Auslassschlitzerinsing and outlet slots
- 1616
- Einlassventilintake valve
- 1717
- Hydraulikkolbenhydraulic pistons
- 1818
- Hydraulikzylinderhydraulic cylinders
- 19, 19a19 19a
- Pumpenkammerpump chamber
- 2020
- Einströmventilintake valve
- 2121
- Ausströmventiloutflow
- 22, 22a22 22a
- Ausströmbohrungoutflow bore
- 2323
- Schiebehülsesliding sleeve
- 2424
- Stellbolzenadjusting bolts
- 2525
- Nutgroove
- 2626
- Ringraumannulus
In Betracht gezogene DruckschriftemIn Regarded pamphlets
-
DE 36 45 103DE 36 45 103 -
DE 36 27 184DE 36 27 184 -
DE 37 08 972DE 37 08 972 -
DE 37 23 948DE 37 23 948 -
DE 41 15 537DE 41 15 537 -
DE 200 19 406DE 200 19 406 -
DE 243 62 24DE 243 62 24 -
DE 271 35 48DE 271 35 48 -
DE 384 32 07DE 384 32 07 -
DE 431 50 46DE 431 50 46 -
DE 441 33 51DE 441 33 51
ZITATE ENTHALTEN IN DER BESCHREIBUNGQUOTES INCLUDE IN THE DESCRIPTION
Diese Liste der vom Anmelder aufgeführten Dokumente wurde automatisiert erzeugt und ist ausschließlich zur besseren Information des Lesers aufgenommen. Die Liste ist nicht Bestandteil der deutschen Patent- bzw. Gebrauchsmusteranmeldung. Das DPMA übernimmt keinerlei Haftung für etwaige Fehler oder Auslassungen.This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.
Zitierte PatentliteraturCited patent literature
- - DE 3627184 A1 [0002] - DE 3627184 A1 [0002]
- - DE 3708972 A1 [0002] - DE 3708972 A1 [0002]
- - DE 3645103 C2 [0002] - DE 3645103 C2 [0002]
- - DE 4115537 A1 [0002] - DE 4115537 A1 [0002]
- - DE 10026458 C2 [0005, 0007, 0017, 0022, 0028] - DE 10026458 C2 [0005, 0007, 0017, 0022, 0028]
- - DE 3645103 [0038] - DE 3645103 [0038]
- - DE 3627184 [0038] - DE 3627184 [0038]
- - DE 3708972 [0038] - DE 3708972 [0038]
- - DE 3723948 [0038] - DE 3723948 [0038]
- - DE 4115537 [0038] - DE 4115537 [0038]
- - DE 20019406 [0038] - DE 20019406 [0038]
- - DE 2436224 [0038] - DE 2436224 [0038]
- - DE 2713548 [0038] DE 2713548 [0038]
- - DE 3843207 [0038] - DE 3843207 [0038]
- - DE 4315046 [0038] - DE 4315046 [0038]
- - DE 4413351 [0038] - DE 4413351 [0038]
Claims (7)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102007056527A DE102007056527A1 (en) | 2007-11-19 | 2007-11-19 | Low-emission internal combustion engine, has low-emission counter piston-two-stroke engine or emission-free formed single-piston engine of two or four-stroke design equipped with machines and/or pumps arranged directly to drive piston |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102007056527A DE102007056527A1 (en) | 2007-11-19 | 2007-11-19 | Low-emission internal combustion engine, has low-emission counter piston-two-stroke engine or emission-free formed single-piston engine of two or four-stroke design equipped with machines and/or pumps arranged directly to drive piston |
Publications (1)
Publication Number | Publication Date |
---|---|
DE102007056527A1 true DE102007056527A1 (en) | 2009-05-20 |
Family
ID=40560851
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE102007056527A Withdrawn DE102007056527A1 (en) | 2007-11-19 | 2007-11-19 | Low-emission internal combustion engine, has low-emission counter piston-two-stroke engine or emission-free formed single-piston engine of two or four-stroke design equipped with machines and/or pumps arranged directly to drive piston |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE102007056527A1 (en) |
Cited By (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2012071239A1 (en) * | 2010-11-23 | 2012-05-31 | Etagen, Inc. | High-efficiency linear combustion engine |
US8413617B2 (en) | 2010-11-23 | 2013-04-09 | Etagen, Inc. | High-efficiency two-piston linear combustion engine |
US8453612B2 (en) | 2010-11-23 | 2013-06-04 | Etagen, Inc. | High-efficiency linear combustion engine |
US8656895B2 (en) | 2011-12-29 | 2014-02-25 | Etagen, Inc. | Methods and systems for managing a clearance gap in a piston engine |
US8720317B2 (en) | 2011-12-29 | 2014-05-13 | Etagen, Inc. | Methods and systems for managing a clearance gap in a piston engine |
US8899192B2 (en) | 2011-12-29 | 2014-12-02 | Etagen, Inc. | Methods and systems for managing a clearance gap in a piston engine |
US8997699B2 (en) | 2011-02-15 | 2015-04-07 | Etagen, Inc. | Linear free piston combustion engine with indirect work extraction via gas linkage |
US9097203B2 (en) | 2011-12-29 | 2015-08-04 | Etagen, Inc. | Methods and systems for managing a clearance gap in a piston engine |
US9169797B2 (en) | 2011-12-29 | 2015-10-27 | Etagen, Inc. | Methods and systems for managing a clearance gap in a piston engine |
US10215229B2 (en) | 2013-03-14 | 2019-02-26 | Etagen, Inc. | Mechanism for maintaining a clearance gap |
CN109519274A (en) * | 2018-10-23 | 2019-03-26 | 中国科学院工程热物理研究所 | Miniature two-stroke reciprocating swing type free-piston engine and starting method |
US10985641B2 (en) | 2018-07-24 | 2021-04-20 | Mainspring Energy, Inc. | Linear electromagnetic machine system with bearing housings having pressurized gas |
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DE3708972A1 (en) | 1986-08-11 | 1988-10-06 | Albert Wagner | Two-stroke diesel engines with opposing free pistons and buffer chambers |
DE3723948A1 (en) | 1987-05-08 | 1988-11-24 | Helmut Prof Dr Rer Nat Krauch | Regenerative heat engine of crossed-piston construction with magnetically guided free pistons |
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DE3645103C2 (en) | 1986-08-11 | 1991-04-18 | Albert 6683 Spiesen-Elversberg De Wagner | Two-stroke Diesel engine with opposed floating pistons |
DE4115537A1 (en) | 1991-05-13 | 1992-11-19 | Wuerth Gustav | Two-stroke engine with double pistons - has smaller piston for combustion chamber operation, air intake low compression larger piston for combustion chamber with high compression |
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DE4413351A1 (en) | 1994-04-18 | 1995-10-19 | Raimund Schmetz | Long four stroke internal combustion engine electro generator |
DE20019406U1 (en) | 1999-11-18 | 2001-01-18 | ATESO, a.s., Jablonec nad Nisou | Electromagnetic dosing piston pump |
DE10026458C2 (en) | 2000-05-27 | 2003-12-11 | Hermann Golle | Low-emission counter-piston two-stroke engine |
-
2007
- 2007-11-19 DE DE102007056527A patent/DE102007056527A1/en not_active Withdrawn
Patent Citations (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2436224A1 (en) | 1973-07-27 | 1975-02-13 | Stanley Works | Permanent magnet pulse generator with linear motion - has spring system for accelerating magnet to produce single pulse |
DE2713548A1 (en) | 1977-03-28 | 1978-10-05 | Walter Holzer | Free piston IC engine - has non-ferrous pistons carrying permanent magnets to work with induction coils on cylinder |
DE3627184A1 (en) | 1986-08-11 | 1988-02-18 | Albert Wagner | Two-stroke diesel engines with opposing free pistons and buffer chambers |
DE3708972A1 (en) | 1986-08-11 | 1988-10-06 | Albert Wagner | Two-stroke diesel engines with opposing free pistons and buffer chambers |
DE3645103C2 (en) | 1986-08-11 | 1991-04-18 | Albert 6683 Spiesen-Elversberg De Wagner | Two-stroke Diesel engine with opposed floating pistons |
DE3723948A1 (en) | 1987-05-08 | 1988-11-24 | Helmut Prof Dr Rer Nat Krauch | Regenerative heat engine of crossed-piston construction with magnetically guided free pistons |
DE3843207A1 (en) | 1988-12-22 | 1990-06-07 | Hinger Klaus Juergen Prof Dr I | Internal combustion engine |
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Cited By (30)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11525391B2 (en) | 2010-11-23 | 2022-12-13 | Mainspring Energy, Inc. | High-efficiency linear generator |
CN103299046A (en) * | 2010-11-23 | 2013-09-11 | 埃塔热发电机股份有限公司 | High-efficiency linear combustion engine |
US9567898B2 (en) | 2010-11-23 | 2017-02-14 | Etagen, Inc. | High-efficiency linear combustion engine |
US8453612B2 (en) | 2010-11-23 | 2013-06-04 | Etagen, Inc. | High-efficiency linear combustion engine |
US10851708B2 (en) | 2010-11-23 | 2020-12-01 | Mainspring Energy, Inc. | High-efficiency linear combustion engine |
JP2013543084A (en) * | 2010-11-23 | 2013-11-28 | エタジェン, インコーポレイテッド | High efficiency linear combustion engine |
US12000331B2 (en) | 2010-11-23 | 2024-06-04 | Mainspring Energy, Inc. | High-efficiency linear generator |
US10221759B2 (en) | 2010-11-23 | 2019-03-05 | Etagen, Inc. | High-efficiency linear combustion engine |
US8413617B2 (en) | 2010-11-23 | 2013-04-09 | Etagen, Inc. | High-efficiency two-piston linear combustion engine |
US8402931B2 (en) | 2010-11-23 | 2013-03-26 | Etagen, Inc. | High-efficiency linear combustion engine |
US8662029B2 (en) | 2010-11-23 | 2014-03-04 | Etagen, Inc. | High-efficiency linear combustion engine |
RU2577425C2 (en) * | 2010-11-23 | 2016-03-20 | Итаджен, Инк. | High-efficiency linear ice |
US10024231B2 (en) | 2010-11-23 | 2018-07-17 | Etagen, Inc. | High-efficiency linear combustion engine |
EP2643573A4 (en) * | 2010-11-23 | 2015-06-10 | Etagen Inc | High-efficiency linear combustion engine |
WO2012071239A1 (en) * | 2010-11-23 | 2012-05-31 | Etagen, Inc. | High-efficiency linear combustion engine |
TWI583862B (en) * | 2010-11-23 | 2017-05-21 | 艾泰傑股份有限公司 | High-efficiency linear combustion engine |
US8997699B2 (en) | 2011-02-15 | 2015-04-07 | Etagen, Inc. | Linear free piston combustion engine with indirect work extraction via gas linkage |
US9097203B2 (en) | 2011-12-29 | 2015-08-04 | Etagen, Inc. | Methods and systems for managing a clearance gap in a piston engine |
US9169797B2 (en) | 2011-12-29 | 2015-10-27 | Etagen, Inc. | Methods and systems for managing a clearance gap in a piston engine |
US10006401B2 (en) | 2011-12-29 | 2018-06-26 | Etagen, Inc. | Methods and systems for managing a clearance gap in a piston engine |
US9004038B2 (en) | 2011-12-29 | 2015-04-14 | Etagen, Inc. | Methods and systems for managing a clearance gap in a piston engine |
US8899192B2 (en) | 2011-12-29 | 2014-12-02 | Etagen, Inc. | Methods and systems for managing a clearance gap in a piston engine |
US8770090B2 (en) | 2011-12-29 | 2014-07-08 | Etagen, Inc. | Methods and systems for managing a clearance gap in a piston engine |
USRE49259E1 (en) | 2011-12-29 | 2022-10-25 | Mainspring Energy, Inc. | Methods and systems for managing a clearance gap in a piston engine |
US8720317B2 (en) | 2011-12-29 | 2014-05-13 | Etagen, Inc. | Methods and systems for managing a clearance gap in a piston engine |
US8656895B2 (en) | 2011-12-29 | 2014-02-25 | Etagen, Inc. | Methods and systems for managing a clearance gap in a piston engine |
US10215229B2 (en) | 2013-03-14 | 2019-02-26 | Etagen, Inc. | Mechanism for maintaining a clearance gap |
US10985641B2 (en) | 2018-07-24 | 2021-04-20 | Mainspring Energy, Inc. | Linear electromagnetic machine system with bearing housings having pressurized gas |
US11616428B2 (en) | 2018-07-24 | 2023-03-28 | Mainspring Energy, Inc. | Linear electromagnetic machine system |
CN109519274A (en) * | 2018-10-23 | 2019-03-26 | 中国科学院工程热物理研究所 | Miniature two-stroke reciprocating swing type free-piston engine and starting method |
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