US3358656A - Devices for starting a double action free piston engine having a single cylinder - Google Patents

Devices for starting a double action free piston engine having a single cylinder Download PDF

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US3358656A
US3358656A US535198A US53519866A US3358656A US 3358656 A US3358656 A US 3358656A US 535198 A US535198 A US 535198A US 53519866 A US53519866 A US 53519866A US 3358656 A US3358656 A US 3358656A
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chamber
piston
pipe
valve
check valve
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US535198A
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English (en)
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Panhard Paul
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Automobiles Citroen SA
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Andre Citroen SA
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
    • F02N99/00—Subject matter not provided for in other groups of this subclass
    • F02N99/002—Starting combustion engines by ignition means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01B—MACHINES OR ENGINES, IN GENERAL OR OF POSITIVE-DISPLACEMENT TYPE, e.g. STEAM ENGINES
    • F01B11/00—Reciprocating-piston machines or engines without rotary main shaft, e.g. of free-piston type
    • F01B11/08—Reciprocating-piston machines or engines without rotary main shaft, e.g. of free-piston type with direct fluid transmission link
    • 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
    • F02B71/02—Starting
    • 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
    • F02B71/045—Adaptations of such engines for special use; Combinations of such engines with apparatus driven thereby with hydrostatic transmission
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
    • F02N9/00—Starting of engines by supplying auxiliary pressure fluid to their working chambers
    • F02N9/04—Starting of engines by supplying auxiliary pressure fluid to their working chambers the pressure fluid being generated otherwise, e.g. by compressing air
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
    • F02N99/00—Subject matter not provided for in other groups of this subclass
    • F02N99/002—Starting combustion engines by ignition means
    • F02N99/006—Providing a combustible mixture inside the cylinder

Definitions

  • the present invention relates to devices for starting an internal combustion engine including a free piston forming inside a cylinder a partition between two combustion chambers.
  • the invention is more especially concerned with a device of this kind for an engine into combustion chambers of which fuel is injected directly through means responsive to the position of the free piston in its cylinder.
  • the chief object of the present invention is to provide a starting device of this kind which is better adapted to meet the requirements of practice than those existing at the present time and in particular which includes no mechanical connection with the free piston.
  • this device comprises, on the one hand, means for admitting air under pressure into one of the combustion chambers of the internal combustion engine (hereinafter called first chamber) and for placing the other of these chambers (hereinafter called second chamber) in communication with the atmosphere, in such manner as to bring the free piston initially into its stroke end position for which the volume of the first chamber is maximum, whatever be the position of this piston before the starting of the engine, and, on the other hand, means for subsequently admitting air under a high pressure into the second chamber so that the piston performs a compression stroke with respect to the first combustion chamber which is then closed and filled with a fuel and air mixture, which produces combustion or explosion in said first chamber, after which the engine works normally without any action of the above mentioned means.
  • FIG. 1 is an axial sectional view of a free piston single cylinder internal combustion engine provided with a starting device made according to a first embodiment of the invention
  • FIG. 2 is a view similar to FIG. 1 of an internal combustion engine provided with a starting device made according to a second embodiment of the invention
  • FIG. 3 is a detail view of an element of thedevice of FIG, 2 in another position of operation.
  • the starting device according to the present invention illustrated by the drawings is for use with a free piston single cylinder internal combustion engine driving a hydraulic transmission pump or, generator, for instance of the type described in the U.S. patent application No. 512,629 of Dec. 9, 1965.
  • the internal combustionengine illustrated by the drawings comprises a free piston 1, the two opposed faces 2 and 3 of which limit in a common cylinder 6 two respective combustion chambers 4 and 5.
  • Piston 1 is provided on its opposed sides with rods 7 and 8 which are slidable in the heads of cylinder 6
  • These rods 7 and 8 may act as pistons or plungers of reciprocating pumps the whole of which constitutes the generator of a hydraulic transmission.
  • Said rods 7 and 8 may further control the injection of fuel into chambers 4 and alternately, as described in the U.S. patent application No. 514,731 of Nov. 19, 1965.
  • FIG. 1 merely shows inlet pipes 9 and delivery pipes 10, the ports of which are directly controlled by piston 1.
  • the starting device according to the present invention includes, as shown by FIG. 1:
  • first means for admitting air under pressure into the first chamber 4 and for connecting the second chamber 5 with the atmosphere, so as first to bring free piston 1 at the stroke end of which the volume of the first chamber 4 is maximum (said stroke end being indicated by the dot-and-dash lines 2a and 3a which represent the corresponding position of piston faces 2 and 3), and
  • the first means comprise a first compressed air chamber 11 adapted to be connected, through a distributing device 12 represented by a cock in FIG. 1, on the one hand to a pipe 13 leading to the first chamber 4 through the intermediate of an automatic valve 14, and, on the other hand to a conduit 15 leading to a pneumatic device 1718 capable of opening a valve 16 adapted to place second chamber 5 into communication with the atmosphere.
  • Valves 14 and 16 are normally held in the closed positions thereof by respective springs 14a and 16a and by the pressure existing in chambers 4 and 5, but valve 14 is arranged to let pass into chamber 4 the air flowing through distributing device 12 from chamber 11, no counter pressure existing at this time in chamber 5.
  • Pneumatic device 17-18 comprises a piston 17 rigid with valve 16 and housed in a cylinder 18 into which pipe 15 opens, spring 16a acting upon valve 16 against the action of the pressure in cylinder 18.
  • the connection of the second chamber 5 with the atmosphere is obtained in a manner which will be hereinafter explained.
  • the second means above referred to comprise a second compressed air chamber 19 connected with the second combustion chamber 5 through a pipe 20 and an automatic valve which is constituted with the pneumatically control valve l'dabove referred to. Consequently, this valve 16, which remains closed during the normal operation of the engine, same as valve 14, is adapted to open not only when air under pressure coming from chamber 11 is ad'mitted'into cylinder 18, to permit the emptying of chamber 5, but also when air under pressure coming from chamber 19 through pipe 20 is directed onto the external face of valve 16 so as to be admitted into chamber 5.
  • Chambers 11 and 19 are located in a common cylinder 26 where they are separated from each other by a piston 27 slidable in said cylinder 26 and adapted to come into contact with an abutment 28, the volume of chamber 11 being then maximum but still much smaller than that of chamber 19, although the latter is then minimum.
  • Chamber 11 is connected with a compressor 29 through a delivery pipe 30' provided with a check valve 30a.
  • valve 31 housed in piston 27, whereby air can flow only from chamber 11 to chamber 19.
  • check valve 32 cooperating with a seat 33 and controlled by piston 27 in such manner that check valve 32 is closed (as shown by the drawing) when piston 27 is applied against its abutment 28, but that said check valve 33 is opened when piston 27 reaches a given limit position at a distance from abutment 28.
  • check valve 32 In order to operate check valve 32, there is provided a rod 34 extending longitudinally in chamber 19 and pulled by piston 27 to move check valve 32 away from its seat 33.
  • a head 34a carried by the end of rod 34 cooperates with a shoulder 27a provided in piston 27.
  • Check valve 32 is adapted to be closed by a spring 35 when piston 27 is applied against abutment 23, this spring 35 being interposed between head 34a and piston 27.
  • compressor 29 has been shown as having a single stage it generally includes two stages, so as to be able to fill chamber 19 with air at a suificient pressure (preferably averaging 16 kgs./cm.
  • the starting device of FIG. 1 works as follows: The operation includes three successive steps, to wit the filling of chambers 11 and 19; a preparatory stroke of piston 1 (toward the left of FIG. 1); and the starting stroke (toward the right of FIG. 1).
  • compressor 29 when compressor 29 is started, it delivers air through conduit 30 past check valve 30a into chamber 11, distributing device 12 being closed.
  • spring 31a of check valve 31 produces a pressure drop of the air flowing through said check valve 31
  • piston 27 moves toward the left until it is stopped by its abutment 28, which causes check valve 32 to be applied against its seat 33 through rod 34.
  • Co. press or 29 fills up chambers 11 and 19 with compressed air marine pressure therein reaches a given value (for instance 16 kgsJcrnF). At this time, compressor 29 is placed out of action in a canner which will be hereinafter explained.
  • the preparatory stroke of piston 1 is started by opening distributing device 12.
  • the air compressed in chamber 11 passes both into conduit (opening valve 16 and placing chamber 5 into communication with the atmosphere through pipe 20, passages 22a and orifice 25) and into conduit 13 (admission of air into chamber 4).
  • Piston 1 whatever be the position in which it was initially, is pushed toward the left of FIG. 1 into the position diagrammatically illustrated at 2a, 3a, that is to say until the air coming from chamber 11 escapes through the ports of the delivery pipe 10 of chamber 4 then uncovered by piston 1.
  • the pressure in chamber 11 then drops to atmospheric pressure.
  • cylinder 18 and valve 16 closes.
  • Chamber 19 remains closed by check valve 32 and the pressure therein has been reduced only to a small extent (its volume being considerably greater than that of chamber 11) by the displacement of piston 27 toward the right. Piston 27 moves toward the right and, at the end of its stroke, opens valve 32.
  • piston 1 By adjustment of the maximum admissible pressure in chamber 19 it is possible to give piston 1 a thrust toward the right greater than that it undergoes under normal working conditions under the effect of explosion or combustion in chamber 5, which has for its effect, when the engine is started, to increase the stroke of piston 1 and therefore to reduce the clearance space in chamber 4 and therefore to increase the compression, which facilitates ignition.
  • the compressor 29 of FIG. 1 is placed out of action when chambers 11 and 19 are filled with air at a given pressure (for instance 16 kgsjcrn).
  • a given pressure for instance 16 kgsjcrn
  • the compressor 29 of FIG. 1 is placed out of action when chambers 11 and 19 are filled with air at a given pressure (for instance 16 kgsjcrn)
  • a compressor having a substantial dead space or including a movable auxiliary piston the compressor working without feeding air but under the maximum delivery pressure as soon as chambers 11 and 19 are filled
  • a compressor having a very small dead space and provided with a pneumatic disconnector device the compressor then turning at atmospheric pressure as soon as chambers 11 and 19 have been filled with air compressed to the desired pressure.
  • FIG. 2 where the pneumatic disconnector, inserted in delivery pipe 30, is designated as a whole by reference numeral 36.
  • the elements of FIG. 2 which are identical to those of FIG. 1 are designated by the same reference numbers.
  • Chamber 37 is connected with the upstream portion of delivery pipe 30.
  • Chamber 38 is connected with the discharge pipe 40 of compressor 29.
  • the third chamber, 39 is connected with the downstream portion of delivery pipe 30.
  • the orifice through which pipe 4! opens into the atmosphere is designated by 41a.
  • Chambers 37 and 39 are connected together by a pipe 41 provided with a check valve 42.
  • This piston 50 is arranged to always leave pipe 41, orifice 47 and the downstream portion of delivery pipe 30 free to communicate together.
  • Reference numeral 38a designates the portion of chamber 38 limited by piston 46 and which communicates with orifice 47.
  • Disconnector 36 works as follows:
  • Compressor 29 being in operation, it feeds compressed air into compressed air chamber 11 through the upstream portion of pipe 30, chamber 37, pipe 41, chamber 39 and the downstream portion of pipe 30.
  • piston 50 is pushed away from its abutment 51 against the action of spring 49 and causes check valve 48 to open orifice 47.
  • the air compressed at this pressure is admitted into the volume portion 38a of chamber 38 and pushes down piston 46 which suddenly opens orifice 43 by means of check valve 44.
  • Compressor 29 then feeds compressed air to the atmosphere through the upstream portion of pipe 30, chamber 37, orifice 43, chamber 38, discharge conduit 40 and orifice-40a.
  • Check valve 42 prevents compressed air chamber 11 from emptying; piston 50 is pushed back by its spring 49 against its abutment 51 and check valve 48 closes back, entrapping in volume portion 38a air at the maximum pressure that has been chosen (16 kgs./cm. I
  • Compressor 29 can work permanently, but it is more advantageous to combine it with a starting central member in'such manner that when said member is in action, it first starts the compressor and then, when the desired pressure has been reached in compressed air chambers 11 and 1-9, automatically causes distributing device 12 to open and then stops the compressor, the distributing device then closing automatically.
  • the starting control member is advantageously arranged in' such manner that, when itis actuated, it exerts a resilient thrust upon a valve 52 mounted in discharge pipe 40, 'a pipe 53 branching olT from discharge pipe 40 upstream of said valve 52 so as to act pneumatically upon distributingdevice 12.
  • said control member consists of a push-button 54 rigid with a piston 55 movable in a cylinder 66.
  • Said cylinder 56 carries the seat 57 of valve 52 and is'provided with the discharge orifice 40a.
  • This orifice 40a is located in such manner that it is closed by piston 55 when push-button 54 is depressed as shown by FIG. 3.
  • said push-button 54 is held by two metal balls 58 urged by springs 59 into a groove formed by a metal ring 60 carried by piston 55.
  • Piston 55 and cylinder 66 are made of an insulating material.
  • a spring 61 exerting a pressure substantially smaller than that of spring 49, for instance of 3 or 3.5 kgs./cm.
  • a spring 62 tends to push back button 54 but its strength is such that balls 58 cannot be retracted by the mere thrust of said spring 62 but by the sum of this thrust and of the air pressure acting on piston 55 when valve 52 is open.
  • Springs 59, balls 58 and ring 60 form an electric contactor inserted in the feed circuit 63 of an electric motor 64 adapted to drive compressor 69, in such manner that this motor 64 is fed with current when button 54 is depressed (FIG. 3) but ceases to be fed with current when button 54 has been pushed back as above stated and as illustrated by FIG. 2.
  • a distributing device 12 adapted to be opened under the effect of the air under pressure fed thereto through pipe 53 and to be automatically closed after the period of time necessary for the discharge of the air in compressed air chamber 11 into the engine chamber 4 so as to bring engine piston 1 into the position diagrammatically illustrated at 2a-3a.
  • This distributing device 12 includes three spaces or chambers 65, 66, 67.
  • Space 65 communicates with pipe 53 through a check valve 68 and a leak passage 69 of small cross section mounted in shunt with check valve 68.
  • Space 66 communicates with the portion 13a of pipe 13 which starts from compressed air chamber 11.
  • Space 67 communicates with the portion 13b of pipe 13 which opens into the chamber 4 of the engine.
  • space 55 there is slidably mounted a piston 70 adapted to push, against the action of a spring 71, the rod 72 of a check valve 73 cooperating with an orifice 74 formed in a partition provided between spaces 66 and 67.
  • Said check valve 73 is urged toward its closed position by a spring 75.
  • Rod 72 is provided with a leak channel 76 extending between space 67 and the portion 65a of space 65 located on the other side of piston 70 from the outlet of pipe 53. Leak channel 76 is closed when piston 70 bears against the end of rod 72.
  • the starting device shown by FIGS. 2 and 3 works in the following manner.
  • check valve 44 is open, since discon nector 36 has worked in the manner above described with reference to FIG. 2.
  • Electric motor 64 is started by the closing of contactor circuit 59, 58, 60 and compressor 29 feeds air under pressure which flows out through discharge conduit 40.
  • Valve 52 loaded byspring 61 is closed as long as the pressure in pipe 53 does not reach the force of spring 61 (from 3 to 3.5 kgs./cm. in the example described). Then it opens when this pressure is reached.
  • piston 70 is pushed toward the right hand side of FIG. 2 and opens check valve 73 against the action of spring 75.
  • Check valve 73 remains open during the time taken by piston 70, pushed by spring 75 and 71, to drive out the air from chamber 65 through leak channel 69, this time being adjusted so that the compressed air admitted into the compression chamber 4 of the engine has been able to push piston 1 into the preliminary position shown at 2a-3a.
  • piston 70 permits check valve 73 to close orifice 74 and the air contained in pipe 15 leading to cylinder 17 escapes through leak passage 76. Valve 16 closes.
  • the second step in the starting of the engine takes place in the manner described with reference to FIG. 1, distributing device 12 then having no action.
  • valve 44 of disconnector 36 In the second case (chambers 11 and 19 being not sufficiently filled with air), the check valve 44 of disconnector 36 is closed. Compressor 29 supplies air under pressure to chambers 11 and 19 through pipe 30. When chambers 11 and 19 are filled with air at the desired pressure, valve 44 opens, as explained with reference to FIG. 2 and the situation is the same as in the first case.
  • a starting device which comprises, in combination,
  • first means for feeding air under pressure into the first combustion chamber and for connecting the second combustion chamber with the atmosphere, whereby said piston is pushed in the direction from said first combustion chamber toward said second combustion chamber into the position thereof for which said first combustion chamber has its maximum volume
  • second means responsive to a displacement of said piston in said direction clearing said discharge ports, for feeding air under high pressure into said second combustion chamber whereby said piston is made to perform a compression stroke with respect to said first chamber.
  • a starting device according to claim 1 wherein said first means include a first compressed air chamber
  • a distributing device having its inlet communicating with said first compressed air chamber
  • valve means for connecting said second combustion chamber with the atmosphere
  • a pneumatic device operative by compressed air from said second pipe for opening said last mentioned valve means.
  • a starting device according to claim 2 wherein said second means include a second compressed air chamber
  • a starting device according to claim 2 wherein said second means include a second compressed air chamber
  • valve means for connecting said second combustion chamber with the atmosphere including a slide valve element operative by the air pressure in said second compressed air chamber to close the communication between said second combustion chamber and the atmosphere while placing said second compressed air chamber into communication, through the other valve element of said last mentioned valve means, with said second combustion chamber.
  • a starting device according to claim 1 wherein said first means include an air compressor,
  • pipe means for connecting the delivery of said compressor with said first compressed air chamber
  • a distributing device having an inlet and an outlet, said inlet communicating with said first compressed air chamber, said distributing device being adapted to occupy either of two positions thereof to wit 'an opening one, in which its inlet is in communication with its outlet and a closing one in which its inlet and its outlet are cut ofif from each other,
  • a third check valve in said third pipe adapted to open toward said second combustion chamber
  • said second means including a second compressed air chamber, said first and second compressed air chambers being portions, in line with each other, of the inside of a cylinder, with a partition piston dividing into inside of said cylinder into said two compressed air chambers, and an abutment rigid with said cylinder being adapted to cooperate with said partition piston to limit the volume of said first compressed air chamber to a value several times smaller than the volume of said second com-' pressed air chamber,
  • a fifth check valve operatively connected with said partition piston for controlling the communication between said longitudinal conduit and said second compressed air chamber, said fifth check valve opening toward the inside of said second compressed air chamber,
  • a slide valve in said longitudinal conduit adapted to place said third pipe in communication with the atmosphere when said fifth check valve is closed and with said longitudinal conduit when said fifth check valve is open, and
  • resilient means for urging said slide valve toward the. position thereof where it places said third pipe in communication with the atmosphere.
  • a starting device further coma prising a discharge pipe and, between said compressor and said first compressed air chamber, a pneumatic disconnector adapted, when the pressure in said first compressed air chamber reaches a predetermined limit, to dis@ connect said compressor from said first compressed air chamber and to connect said compressor with said discharge pipe.
  • a starting device according to claim 6 wherein said pneumatic disconnector comprises a casing forming three successive compartments,
  • the first of said compartment being connected with the upstream end of the pipe means for connecting the delivery of said compressor with said first compressed air chamber
  • said second compartment being in the form of a cylinder
  • said third compartment including a cylindrical portion
  • spring means for resiliently opposing the thrust on said last mentioned piston of the pressure in said first compressed air chamber.
  • a starting device wherein said compressor belongs to a motor-compressor system, which starting device comprises a control device including a movable control member for starting said motor-compressor unit, means operative by said control member for operating said distributing device and means for automatically restoring said control member into the position thereof for which said motor-compressor unit is stopped.
  • a starting device comprising a discharge pipe provided with a discharge orifice, said discharge orifice being normally connected with the output of said air compressor,
  • valve means adapted to cooperate with said valve seat and operatively connected with said control member for cutting off said air compressor output from said discharge orifice
  • said last mentioned valve means being responsive to the opposed actions of the pressure in said discharge pipe tending to open it and of said last mentioned spring means tending to close it, the force of said last mentioned spring means being lower than the effect thereon of the pressure in said discharge pipe,
  • a starting device wherein said control member is rigid with a piston
  • a starting device comprising a movable control member adapted to occupy an operative position and an inactive position
  • valve means adapted to cooperate with said valve seat and operatively connected with said control member for cutting oit said air compressor output from said discharge orifice
  • said last mentioned valve means being responsive to the opposed actions of the pressure in said discharge pipe tending to open it and of said last mentioned spring means tending to close it, the force of said last mentioned spring means being lower than the efiect thereon of the pressure in said discharge pipe,
  • said electric circuit including a fixed contact rigid with said fixed valve seat and a movable contact rigid with said control member adapted to cooperate with said fixed contact, said fixed and movable contacts being resiliently to lock in each other.
  • a starting device wherein said pneumatic device includes a cylinder having one end thereof connected with said transmission pipe,
US535198A 1965-03-23 1966-03-17 Devices for starting a double action free piston engine having a single cylinder Expired - Lifetime US3358656A (en)

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FR10410A FR1439104A (fr) 1965-03-23 1965-03-23 Perfectionnements apportés aux dispositifs de mise en marche des moteurs monocylindriques à piston libre à double effet

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US3358656A true US3358656A (en) 1967-12-19

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US (1) US3358656A (xx)
BE (1) BE677478A (xx)
DE (1) DE1526358A1 (xx)
ES (1) ES324474A1 (xx)
FR (1) FR1439104A (xx)
GB (1) GB1138633A (xx)
NL (1) NL6603752A (xx)
SE (1) SE309693B (xx)

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US20050126177A1 (en) * 2003-12-11 2005-06-16 Primlani Indru J. Thermal gas compression engine
US6966280B1 (en) * 2004-05-07 2005-11-22 Ford Global Technologies, Llc Compression pulse starting of a free piston internal combustion engine having multiple cylinders
US20050257758A1 (en) * 2004-05-20 2005-11-24 Lixin Peng Compression pulse starting of a free piston internal combustion engine
US20080196410A1 (en) * 2003-12-11 2008-08-21 Primlani Indru J Power generating systems and methods
US20120266842A1 (en) * 2009-12-24 2012-10-25 Libertine Fpe Ltd. Combustion Management System
US9366199B2 (en) * 2014-05-09 2016-06-14 Ali Farzad Farzaneh Sliding engine with shaft on one or both ends for double or single ended combustion
US9551221B1 (en) 2015-07-15 2017-01-24 Aquarius Engines (A.M.) Ltd. Engine with continuous gas exchange during momentum stroke
US9995212B2 (en) 2014-04-24 2018-06-12 Aquarius Engines (A.M.) Ltd. Free piston engine
US10641166B1 (en) 2018-12-03 2020-05-05 Aquarius Engines (A.M.) Ltd. Piston rod and free piston engine
US11008864B2 (en) 2014-04-24 2021-05-18 Aquarius Engines (A.M.) Ltd. Engine with work stroke and gas exchange through piston rod
US11008959B2 (en) 2019-06-28 2021-05-18 Aquarius Engines Central Europe Sp. z o.o. System and method for controlling engine using reference point
US11255405B2 (en) 2015-10-20 2022-02-22 Aquarius Engines (A.M.) Ltd. Vibration prevention in a linear actuator
CN114320697A (zh) * 2021-12-29 2022-04-12 潍柴动力股份有限公司 一种发动机的空气分配器及发动机
US11346219B2 (en) 2014-04-24 2022-05-31 Aquarius Engines (A.M.) Ltd. Engine with work stroke and gas exchange through piston rod

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FR2557633B1 (fr) * 1984-01-04 1986-05-30 Bmb Dispositif de demarrage pour moteur a combustion interne, en particulier pour moteur a piston libre
WO1998020242A1 (en) * 1996-11-05 1998-05-14 Pagel Arnfried Guenter Dagober 1-cylinder-2-chamber motor
GB2502582B (en) * 2012-05-31 2017-09-27 Abu Al-Rubb Khalil An internal combustion engine and method of operating an internal combustion engine

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US20080196410A1 (en) * 2003-12-11 2008-08-21 Primlani Indru J Power generating systems and methods
US20050172631A1 (en) * 2003-12-11 2005-08-11 Primlani Indru J. Adiabatic power generating system
US6955052B2 (en) 2003-12-11 2005-10-18 Primlani Indru J Thermal gas compression engine
US20050126177A1 (en) * 2003-12-11 2005-06-16 Primlani Indru J. Thermal gas compression engine
US7654073B2 (en) 2003-12-11 2010-02-02 Primlani Indru J Power generating systems and methods
US7134285B2 (en) 2003-12-11 2006-11-14 Primlani Indru J Adiabatic power generating system
US6966280B1 (en) * 2004-05-07 2005-11-22 Ford Global Technologies, Llc Compression pulse starting of a free piston internal combustion engine having multiple cylinders
US20050257758A1 (en) * 2004-05-20 2005-11-24 Lixin Peng Compression pulse starting of a free piston internal combustion engine
US6971340B1 (en) * 2004-05-20 2005-12-06 Ford Global Technologies, Llc Compression pulse starting of a free piston internal combustion engine
US20120266842A1 (en) * 2009-12-24 2012-10-25 Libertine Fpe Ltd. Combustion Management System
US11686199B2 (en) 2014-04-24 2023-06-27 Aquarius Engines (A.M.) Ltd. Engine with gas exchange through piston rod
US11346219B2 (en) 2014-04-24 2022-05-31 Aquarius Engines (A.M.) Ltd. Engine with work stroke and gas exchange through piston rod
US9845680B2 (en) * 2014-04-24 2017-12-19 Aquarius Engines (A.M.) Ltd. Gas exchange through engine piston rod
US11008864B2 (en) 2014-04-24 2021-05-18 Aquarius Engines (A.M.) Ltd. Engine with work stroke and gas exchange through piston rod
US10968742B2 (en) 2014-04-24 2021-04-06 Aquarius Engines (A.M.) Ltd. Engine with work stroke and gas exchange through piston rod
US10428655B2 (en) 2014-04-24 2019-10-01 Aquarius Engines (A.M.) Ltd. Engine with compression and momentum stroke
US9995212B2 (en) 2014-04-24 2018-06-12 Aquarius Engines (A.M.) Ltd. Free piston engine
US9366199B2 (en) * 2014-05-09 2016-06-14 Ali Farzad Farzaneh Sliding engine with shaft on one or both ends for double or single ended combustion
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US9551221B1 (en) 2015-07-15 2017-01-24 Aquarius Engines (A.M.) Ltd. Engine with continuous gas exchange during momentum stroke
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US10280751B2 (en) 2015-07-15 2019-05-07 Aquarius Engines (A.M.) Ltd. Gapless piston ring for internal combustion engine
US9869179B2 (en) 2015-07-15 2018-01-16 Aquarius Engines (A.M.) Ltd. Engine with piston that overshoots cylinder wall exhaust port
US9689259B2 (en) 2015-07-15 2017-06-27 Aquarius Engines (A.A.) Ltd. Engine with compression and momentum stroke
US11255405B2 (en) 2015-10-20 2022-02-22 Aquarius Engines (A.M.) Ltd. Vibration prevention in a linear actuator
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US11346279B2 (en) 2018-12-03 2022-05-31 Aquarius Engines (A.M.) Ltd. Piston rod and free piston engine
US11655756B2 (en) 2018-12-03 2023-05-23 Aquarius Engines (A.M.) Ltd. Single air supply using hollow piston rod
US10641166B1 (en) 2018-12-03 2020-05-05 Aquarius Engines (A.M.) Ltd. Piston rod and free piston engine
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CN114320697A (zh) * 2021-12-29 2022-04-12 潍柴动力股份有限公司 一种发动机的空气分配器及发动机
CN114320697B (zh) * 2021-12-29 2023-06-23 潍柴动力股份有限公司 一种发动机的空气分配器及发动机

Also Published As

Publication number Publication date
GB1138633A (en) 1969-01-01
BE677478A (xx) 1966-08-01
DE1526358A1 (de) 1970-09-10
ES324474A1 (es) 1967-02-01
NL6603752A (xx) 1966-09-26
FR1439104A (fr) 1966-05-20
SE309693B (xx) 1969-03-31

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