DE19738375A1 - Two-stroke piston engine-driven linear current generator - Google Patents
Two-stroke piston engine-driven linear current generatorInfo
- Publication number
- DE19738375A1 DE19738375A1 DE1997138375 DE19738375A DE19738375A1 DE 19738375 A1 DE19738375 A1 DE 19738375A1 DE 1997138375 DE1997138375 DE 1997138375 DE 19738375 A DE19738375 A DE 19738375A DE 19738375 A1 DE19738375 A1 DE 19738375A1
- Authority
- DE
- Germany
- Prior art keywords
- combustion
- piston
- cylinder
- current generator
- linear current
- 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.)
- Granted
Links
- 238000002485 combustion reaction Methods 0.000 claims abstract description 35
- 238000007906 compression Methods 0.000 claims abstract description 6
- 230000006835 compression Effects 0.000 claims abstract description 5
- 238000002347 injection Methods 0.000 claims description 6
- 239000007924 injection Substances 0.000 claims description 6
- 239000000446 fuel Substances 0.000 claims description 5
- 239000000314 lubricant Substances 0.000 claims description 5
- 238000005461 lubrication Methods 0.000 claims description 5
- 238000005259 measurement Methods 0.000 claims description 5
- 238000004519 manufacturing process Methods 0.000 claims description 4
- 238000009423 ventilation Methods 0.000 claims 1
- 239000012528 membrane Substances 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 8
- 238000011010 flushing procedure Methods 0.000 description 4
- 239000007789 gas Substances 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- 239000003054 catalyst Substances 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000000567 combustion gas Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000010926 purge 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
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
- F01M1/00—Pressure lubrication
- F01M1/08—Lubricating systems characterised by the provision therein of lubricant jetting means
-
- 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
- F02B75/16—Engines characterised by number of cylinders, e.g. single-cylinder engines
- F02B75/18—Multi-cylinder engines
- F02B75/24—Multi-cylinder engines with cylinders arranged oppositely relative to main shaft and of "flat" type
- F02B75/246—Multi-cylinder engines with cylinders arranged oppositely relative to main shaft and of "flat" type with only one crankshaft of the "pancake" type, e.g. pairs of connecting rods attached to common crankshaft bearing
-
- 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)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Output Control And Ontrol Of Special Type Engine (AREA)
Abstract
Description
Bekannt ist das Verfahren für die Stromerzeugung aus einer linearen, hin- und hergehenden Bewegung, hervorgerufen durch ein Kolbensystem, bei dem zwei miteinander gekoppelte Kolben zwischen zwei sich gegenüberliegenden Brennräumen hin -und herschwingen (DE 39 13 806 A (EP 0 120 986 A1).The method for power generation from a linear, back and forth is known movement resulting from a piston system in which two pistons coupled to each other between two opposing combustion chambers swing back and forth (DE 39 13 806 A (EP 0 120 986 A1).
Bei allen mir bekannten Verfahren werden zu geringe Schwingungsfrequenzen erreicht, was vor allem an der ungenügenden Zylinderbefüllung und Zylinderspülung liegt. Im Besonderen wird der Systemschmierung zu wenig Beachtung geschenkt, obwohl gerade dieser Punkt das größte Problem der Zweitakttechnologie darstellt.In all methods known to me, vibration frequencies which are too low are achieved, which is mainly due to insufficient cylinder filling and cylinder flushing. In particular, too little attention is paid to system lubrication, though This is the biggest problem with two-stroke technology.
Diese beiden Probleme werden durch die Patentansprüche 1 bis 4 gelöst. Die Zylinderbefüllung wird dadurch verbessert, indem die Verbrennungsluft bereits vorverdichtet und somit beschleunigt und unter Druck in die Brennkammern strömt und somit auch die Zylinderspülung unterstützt.These two problems are solved by claims 1 to 4. The cylinder filling is improved by the fact that the combustion air already pre-compressed and thus accelerated and flows under pressure into the combustion chambers and thus also supports the cylinder flushing.
Erreicht wird dies mit der Verwendung von zwei Stufenkolben, deren der Brenn kammern abgewandten Seiten einen größeren Durchmesser besitzen als die der Brenn kammern zugewandten Seiten, und somit den Brennkammern mehr Verbrennungs luft zugeführt wird als ihr Volumen beträgt.This is achieved with the use of two stepped pistons, the combustion of which sides facing away from the chambers have a larger diameter than that of the burner chamber facing sides, and thus the combustion chambers more combustion air is supplied as its volume.
Die Schmierung des Freikolbenmotors erfolgt nicht wie bei anderen Zweitaktmotoren über die Verbrennungsluft, ist also somit keine Verlustschmierung.The free-piston engine is not lubricated like other two-stroke engines via the combustion air, so there is no loss lubrication.
Der Vorgang der Zylinderbefüllung und -spülung im Einzelnen:
Die Verbrennungsluft (8) wird von den Stufenkolben (1) (Patentanspruch 1) in die
Vorverdichtungskammern (12) angesaugt, während sie sich in Richtung Brennkammern
(13) bewegen. Die Strömungsrichtung wird mittels jeweils einem einlaßseitigem (4) und
einem auslaßseitigem (5) Membranventil bestimmt.The process of cylinder filling and flushing in detail:
The combustion air ( 8 ) is sucked into the precompression chambers ( 12 ) by the step pistons ( 1 ) (claim 1) while they are moving in the direction of the combustion chambers ( 13 ). The direction of flow is determined by means of an inlet-side ( 4 ) and an outlet-side ( 5 ) membrane valve.
Die Verbrennungsluft wird in die jeweils einen oder mehreren Überströmkanäle (16) pro Zylinderseite geleitet, die durch ihr bestimmtes Volumen zugleich einen Druck speicher darstellen (Patentanspruch 2). Die hier verdichtete Luft kann erst in die Brennkammern strömen, wenn der Einlaßschlitz (17) von dem sich in Richtung Vorverdichtungskammer bewegenden Stufenkolben freigegeben wird.The combustion air is conducted into the one or more overflow channels ( 16 ) per cylinder side, which at the same time represent a pressure accumulator due to their specific volume (claim 2). The air compressed here can only flow into the combustion chambers when the inlet slot ( 17 ) is released by the stepped piston moving in the direction of the precompression chamber.
In diesem Augenblick treten die Abgase (10) über die Auslaßöffnung (18) aus dem Brennraum aus und die Frischgase ein (Zweitaktverfahren).At this moment, the exhaust gases ( 10 ) exit the combustion chamber via the outlet opening ( 18 ) and the fresh gases enter (two-stroke process).
Nachdem der Stufenkolben durch die Bewegung in die Gegenrichtung die Ein- und Auslaßöffnungen verschlossen hat, werden beim Verdichtungsvorgang der Ver brennungsluft im Brennraum der Kraftstoff über ein elektromagnetisches Ventil (6) direkt eingespritzt (Patentanspruch 4). Die Verdichtungsleistung wird dabei von dem gegenüberliegenden Stufenkolben über eine Verbindungsstange erbracht. Nachdem das Luft-Kraftstoffgemisch -beim Benzinbetrieb durch die Zündkerze (7) oder beim Dieselbetrieb durch Selbstentzündung aufgrund der hohen Verdichtung- gezündet wird, expandiert das Verbrennungsgas und drückt den Stufenkolben wieder in Richtung Vor verdichtungskammer, wo wiederum die Verbrennungsluft vorverdichtet wird. Außerdem treibt er den gegenüberliegenden Stufenkolben an, der Vorgang beginnt erneut.After the stepped piston has closed the inlet and outlet openings by the movement in the opposite direction, the fuel is injected directly via an electromagnetic valve ( 6 ) during the compression process of the combustion air in the combustion chamber (claim 4). The compression performance is provided by the opposite step piston via a connecting rod. After the air-fuel mixture is ignited by the spark plug ( 7 ) in gasoline operation or by self-ignition due to the high compression in diesel operation, the combustion gas expands and pushes the stepped piston back towards the pre-compression chamber, where the combustion air is again pre-compressed. He also drives the opposite piston, the process begins again.
Der Vorgang der Systemschmierung im Einzelnen (Patentanspruch 3):
Die Luft in dem verbleibenden Räumen (22) zwischen der Brennkammern und
Vorverdichtungszylindern wird bei der Bewegung des Stufenkolbens zum Brennraum
über Verbindungskanäle zu demselbigem Raum auf der gegenüberliegenden
Stufenkolben-Zylinderkombination verdrängt. Bei umgekehrter Bewegung der Kolben
strömt die Luft wieder zurück.The process of system lubrication in detail (claim 3):
The air in the remaining spaces ( 22 ) between the combustion chambers and precompression cylinders is displaced when the stepped piston moves to the combustion chamber via connecting channels to the same space on the opposite stepped piston and cylinder combination. When the pistons move in reverse, the air flows back again.
Es werden mindestens zwei Verbindungskanäle angeordnet, wobei sich in einem der oberseitigen Verbindungskanäle (15) Düsen (16) befinden, die in den oszillierenden Luftstrom oder direkt in den o.g. Räumen Schmierstoff einspritzen.At least two connecting channels are arranged, nozzles ( 16 ) being located in one of the upper connecting channels ( 15 ) and injecting lubricant into the oscillating air stream or directly into the above-mentioned spaces.
Ein unterseitiger Verbindungskanal (9) wird dazu benutzt, um das abfließende Schmier mittel zu einem Pumpensumpf (14) zu führen, wo durch eine Pumpe und den Versorgungsleitungen zu den Schmiermitteleinspritzdüsen ein Ölkreislauf gegeben ist.An underside connecting channel ( 9 ) is used to guide the flowing lubricant to a pump sump ( 14 ), where an oil circuit is provided by a pump and the supply lines to the lubricant injection nozzles.
Für die exakte Steuerung des Zündzeitpunktes (nur bei Benzinbetrieb) und des Kraftstoffeinspritzzeitpunktes ist das Bestimmen der genauen Lage des Kolbensystems zu jedem Zeitpunkt notwendig.For the exact control of the ignition timing (only with petrol operation) and the Fuel injection time is the determination of the exact position of the piston system necessary at all times.
Dafür ist eine elektrooptische Messungsanordnung (Patentanspruch 5) angebracht, die zur Distanzmessung moduliertes Licht verwendet.For this, an electro-optical measurement arrangement (claim 5) is attached, the modulated light used for distance measurement.
Der Meßstrahl (21) wird aus einem Sender über ein Spiegelsystem (20) zur Kolbenverbindungsstange bzw. zum dem mit ihr fest verbundenen Anker (2), der die Spule (3) durchkreuzt geleitet. Über die Phasendifferenz des Referenzsignals und des Signal des in den Empfängers zurückgeführten Lichtstrahls kann die genaue Kolbenposition errechnet werden.The measuring beam ( 21 ) is transmitted from a transmitter via a mirror system ( 20 ) to the piston connecting rod or to the armature ( 2 ) which is firmly connected to it and which crosses the coil ( 3 ). The exact piston position can be calculated via the phase difference of the reference signal and the signal of the light beam returned to the receiver.
Die gewonnen Daten der Messung werden an ein Steuergerät weitergegeben. Das Steuergerät bestimmt den Zündzeitpunkt, den Einspritzzeitpunkt und -Menge, die Spannung der Erregerspulen sowie das Umschalten von Motorbetrieb (für den Start vorgang) zum Generatorbetrieb und umgekehrt.The measurement data obtained are passed on to a control unit. The control unit determines the ignition timing, the injection timing and quantity, the Voltage of the excitation coils as well as switching from motor operation (for the start process) for generator operation and vice versa.
Bei dem nach o.g. Patentansprüchen konstruierten zweitaktfreikolbenmotorbetriebenen
Linearstromgenerator würden sich folgende Vorteile gegenüber bestehenden Otto- und
Dieselmotorbetriebenen Stromgeneratoren herkömmlicher Bauart ergeben:
The two-stroke free-piston motor-operated linear current generator constructed according to the above patent claims would have the following advantages over existing gasoline and diesel motor-operated current generators of conventional design:
- - sehr guter Spüleffekt der Brennkammern durch die Zuführung von vorverdichteter Verbrennungsluft- Very good purging effect of the combustion chambers by adding pre-compressed combustion air
- - keine Verlustschmierung- no loss lubrication
- - durch Kraftstoffdirekteinspritzung und den nicht vorhandenen Schmieröl in der Verbrennungsluft ergeben sich in Verbindung mit einem Dreiwegekatalysator (Benzinbetrieb), oder Oxidationskatalysator (Dieselbetrieb) sehr gute Abgaswerte - through direct fuel injection and the lack of lubricating oil in the Combustion air results in connection with a three-way catalytic converter (Petrol operation), or oxidation catalyst (diesel operation) very good Emission values
- - keine Umwandlung von linearen Bewegungen in Drehbewegungen, dadurch geringerer Verbrauch- therefore no conversion of linear movements into rotary movements lower consumption
- - Zweitaktverfahren ohne Spülverluste, dadurch geringerer Verbrauch- Two-stroke process without flushing losses, thereby lower consumption
- - keine viertaktüblichen Ein- und Auslaßventile, kein Ventiltrieb notwendig, dadurch weniger Reibungsverluste- no four-stroke intake and exhaust valves, no valve train necessary, therefore less friction losses
- - keine Kurbelwelle und deren Kugel- oder Walzenlager notwendig- No crankshaft and their ball or roller bearings necessary
- - keine drehbaren Dichtungen der Antriebswellen notwendig- no rotatable seals of the drive shafts necessary
- - sehr wenige bewegliche Teile- very few moving parts
- - Motor- und Generatorteil sind in einem gemeinsamen, leicht zu fertigendem Gehäuse vereint- Motor and generator parts are in one, easy to manufacture Housing united
- - dadurch geringes Gewicht, kleine Abmessungen und sehr günstige Produktionskosten.- thereby light weight, small dimensions and very cheap Production costs.
Durch die o.g. Vorteile ergibt sich ein leichtes, kompaktes, günstig herzustellendes und energiesparendes Stromerzeugungssystem, das für verschiedene Einsatzgebiete hervorragend geeignet wäre.Through the above The advantages are a light, compact, inexpensive to manufacture and Energy-saving power generation system that for different areas of application would be excellent.
Diese wären z. B. der Einsatz in Hybridfahrzeugen, wo das System den Akkumulator versorgt.These would be e.g. B. use in hybrid vehicles, where the system uses the battery provided.
Diesem genügte eine geringere Kapazität und somit ein geringeres Gewicht und Dimensionen, weil er nach der Entladung vom System während der Fahrt nachgeladen wird. Der Akku muß dadurch nur als Pufferspeicher und zur Bewältigung von Kurzstrecken oder Stadtverkehrsabschnitten ausgelegt werden.A lower capacity and thus a lower weight and was sufficient for this Dimensions because it is reloaded by the system after unloading while driving becomes. The battery only needs to be used as a buffer and to cope with Short distances or urban traffic sections can be designed.
Einsatz in Blockheizkraftwerken, vor allem durch die o.g. Vorteile auch in kleineren Anlagen wie z. B. in Einfamilienhäusern.Use in combined heat and power plants, especially by the above Advantages even in smaller ones Plants such as B. in single-family houses.
Einsatz als mobile Stromerzeuger wie Baustellen- Stromaggregate usw., und stationäre Stromerzeuger wie Notstromerzeuger usw.Use as mobile power generators such as construction site generators etc., and stationary Generators such as emergency generators, etc.
Claims (5)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE1997138375 DE19738375C2 (en) | 1997-09-03 | 1997-09-03 | Two-stroke free-piston motor-operated linear current generator |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE1997138375 DE19738375C2 (en) | 1997-09-03 | 1997-09-03 | Two-stroke free-piston motor-operated linear current generator |
Publications (2)
Publication Number | Publication Date |
---|---|
DE19738375A1 true DE19738375A1 (en) | 1999-03-18 |
DE19738375C2 DE19738375C2 (en) | 1999-07-08 |
Family
ID=7840990
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE1997138375 Expired - Fee Related DE19738375C2 (en) | 1997-09-03 | 1997-09-03 | Two-stroke free-piston motor-operated linear current generator |
Country Status (1)
Country | Link |
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DE (1) | DE19738375C2 (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10026684A1 (en) * | 2000-05-30 | 2001-12-13 | Rudolf Hager | Method to reduce combustion chamber in cylinder of two-stroke diesel engine for block-type thermal power station; involves using only substantially clean oxygen to burn fuel |
DE10242141A1 (en) * | 2002-09-03 | 2004-03-18 | Deutsches Zentrum für Luft- und Raumfahrt e.V. | Free-piston combustion device with electric linear drive |
US7380527B2 (en) * | 2005-10-28 | 2008-06-03 | Reisser Heinz-Gustav A | Internal combustion engine |
GB2480461A (en) * | 2010-05-19 | 2011-11-23 | Rikard Mikalsen | Free-piston internal combustion engine |
CN104196623A (en) * | 2014-07-29 | 2014-12-10 | 北京理工大学 | Natural aspiration type free piston internal combustion engine generator with two stages of pistons |
ES2691568A1 (en) * | 2017-01-26 | 2018-11-27 | Talleres Núñez Sierra, S.L. | Linear motion electric generator motor (Machine-translation by Google Translate, not legally binding) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102006061212B3 (en) * | 2006-12-22 | 2008-03-13 | BSH Bosch und Siemens Hausgeräte GmbH | Household appliance i.e. laundry dryer, for drying wet goods e.g. laundry items, has condenser through which heat from air flow is conveyed to process gas, and heater through which heat of air flow from process gas is conveyed |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3103432A1 (en) * | 1981-02-02 | 1982-09-02 | Franz 8080 Fürstenfeldbruck Pfister | Linear combustion engine, which with a linear electrical generator forms a standard unit |
EP0120986A1 (en) * | 1983-03-31 | 1984-10-10 | Z U V "Progress" | Method for current generation in a cyclic combustion process |
DE3600657A1 (en) * | 1986-01-11 | 1987-07-16 | Bongers Hermann | Opposing cylinder two-stroke internal combustion engine |
DE3913806A1 (en) * | 1988-04-26 | 1989-11-09 | Joseph F Kos | HYBRID ENGINE |
DE4426552A1 (en) * | 1994-07-27 | 1996-02-01 | Wolfgang A Dr Rer Nat Redmann | Combined generator and IC engine set for current generation |
-
1997
- 1997-09-03 DE DE1997138375 patent/DE19738375C2/en not_active Expired - Fee Related
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3103432A1 (en) * | 1981-02-02 | 1982-09-02 | Franz 8080 Fürstenfeldbruck Pfister | Linear combustion engine, which with a linear electrical generator forms a standard unit |
EP0120986A1 (en) * | 1983-03-31 | 1984-10-10 | Z U V "Progress" | Method for current generation in a cyclic combustion process |
DE3600657A1 (en) * | 1986-01-11 | 1987-07-16 | Bongers Hermann | Opposing cylinder two-stroke internal combustion engine |
DE3913806A1 (en) * | 1988-04-26 | 1989-11-09 | Joseph F Kos | HYBRID ENGINE |
DE4426552A1 (en) * | 1994-07-27 | 1996-02-01 | Wolfgang A Dr Rer Nat Redmann | Combined generator and IC engine set for current generation |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10026684A1 (en) * | 2000-05-30 | 2001-12-13 | Rudolf Hager | Method to reduce combustion chamber in cylinder of two-stroke diesel engine for block-type thermal power station; involves using only substantially clean oxygen to burn fuel |
DE10026684C2 (en) * | 2000-05-30 | 2002-05-08 | Rudolf Hager | Improvement of efficiency in combined heat and power plants powered by a diesel engine |
DE10242141A1 (en) * | 2002-09-03 | 2004-03-18 | Deutsches Zentrum für Luft- und Raumfahrt e.V. | Free-piston combustion device with electric linear drive |
US7380527B2 (en) * | 2005-10-28 | 2008-06-03 | Reisser Heinz-Gustav A | Internal combustion engine |
GB2480461A (en) * | 2010-05-19 | 2011-11-23 | Rikard Mikalsen | Free-piston internal combustion engine |
GB2480461B (en) * | 2010-05-19 | 2012-10-10 | Univ Newcastle | Free piston internal combustion engine |
CN103038450A (en) * | 2010-05-19 | 2013-04-10 | 泰恩河畔纽卡斯尔大学 | Free-piston internal combustion engine |
US9032918B2 (en) | 2010-05-19 | 2015-05-19 | University Of Newcastle Upon Tyne | Free-piston internal combustion engine |
CN104196623A (en) * | 2014-07-29 | 2014-12-10 | 北京理工大学 | Natural aspiration type free piston internal combustion engine generator with two stages of pistons |
ES2691568A1 (en) * | 2017-01-26 | 2018-11-27 | Talleres Núñez Sierra, S.L. | Linear motion electric generator motor (Machine-translation by Google Translate, not legally binding) |
Also Published As
Publication number | Publication date |
---|---|
DE19738375C2 (en) | 1999-07-08 |
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OP8 | Request for examination as to paragraph 44 patent law | ||
8122 | Nonbinding interest in granting licenses declared | ||
D2 | Grant after examination | ||
8364 | No opposition during term of opposition | ||
8339 | Ceased/non-payment of the annual fee |