EP3048245A1 - Plateau oscillant pour un moteur à carburant - Google Patents

Plateau oscillant pour un moteur à carburant Download PDF

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Publication number
EP3048245A1
EP3048245A1 EP15075001.6A EP15075001A EP3048245A1 EP 3048245 A1 EP3048245 A1 EP 3048245A1 EP 15075001 A EP15075001 A EP 15075001A EP 3048245 A1 EP3048245 A1 EP 3048245A1
Authority
EP
European Patent Office
Prior art keywords
piston
drive shaft
axis
ring
central
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
Application number
EP15075001.6A
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German (de)
English (en)
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EP3048245B1 (fr
Inventor
Gerrit-Jan Van Rossem
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
VERKEST, CATHERINE
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Van Rossem Gerrit-Jan
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Priority to EP15075001.6A priority Critical patent/EP3048245B1/fr
Publication of EP3048245A1 publication Critical patent/EP3048245A1/fr
Application granted granted Critical
Publication of EP3048245B1 publication Critical patent/EP3048245B1/fr
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    • 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
    • F01B3/00—Reciprocating-piston machines or engines with cylinder axes coaxial with, or parallel or inclined to, main shaft axis
    • F01B3/02—Reciprocating-piston machines or engines with cylinder axes coaxial with, or parallel or inclined to, main shaft axis with wobble-plate
    • 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
    • F02B75/26—Engines with cylinder axes coaxial with, or parallel or inclined to, main-shaft axis; Engines with cylinder axes arranged substantially tangentially to a circle centred on main-shaft axis

Definitions

  • the present invention relates to a swash plate for a fuel engine, wherein the pistons are arranged to move linearly along axes parallel to the central axis of the drive shaft.
  • the linear motion of a piston is converted into rotation by means of at least one swash plate.
  • the heads of two pistons share the same combustion chamber.
  • the engine is advantageously characterised by the opposing movements of pairs of pistons along axes parallel to drive shaft axis.
  • the problems with known engines comprising parallel-aligned pistons lie in the wear of the swash plates.
  • the swash plate comprises an outer ring and an inner boss, which is held and rotates within the ring on a set of bearings, that are usually needle bearings.
  • the boss is attached to the drive shaft at an inclined angle, so that linear movements of the ring by the pistons cause the inner boss and shaft to rotate.
  • the swash plate experiences high revolutions and peak pressures, and often insufficient oiling of the joints between the boss and ring, and between the ring and piston.
  • the distance between the central axis of the drive shaft and the coupling element for the first piston rod is different from the distance between the central axis of the drive shaft and the coupling element for the second piston rod.
  • the swash plate of the invention is intended to solve this problem.
  • the invention relates to a swash plate for a fuel engine, said fuel engine comprising at least:
  • the elements of the first and second parts are adapted so that the center of gravity of the swash plate is located at the intersection point of the axis of the hole for the drive shaft with the axis of the central hole of the ring.
  • the swash plate of the invention has one or more of the following characteristics :
  • the invention relates also to a fuel engine comprising at least:
  • the enveloppe forms recesses for receiving tube elements intended to form the combustion chambers in which are moving the pistons.
  • Said envelope has advantageously abutments for avoiding relative movements between the tube elements and the envelope during the movement of pistons inside the tube elements.
  • the enveloppe is formed by two shells.
  • the envelope has advantageously two passages for receiving partly the end of the protruding element (48A3), advantageously with interposition of a bearing.
  • the engine for each combustion chamber, the engine comprises a pair of pistons arranged to move along parallel axes or co-axially, and two swash plates according to the invention connected to pistons through piston rods, for driving into rotation the drive shaft.
  • the invention further relates to the use of an engine according to the invention for generating a power or a driving force.
  • a channel means one channel or at least one channel or more than one channel.
  • Fuel means any fuel suitable for engine combustion, including, but not limited to petrol, diesel, oil, gas, methane, propane, etc., and combinations thereof.
  • the present invention relates to an engine wherein the pistons are arranged to move along axes parallel to the central axis of the drive shaft,with one single piston moving in each combustion chamber, but preferably in which a pair of pistons share the same combustion chamber, and the linear motion of piston rods rotate the drive shaft by means of two swash plates.
  • Such engines and variations thereof are known the art for example, from EP 0 052 387 and US 4,202,251 which are incorporated herein by reference.
  • Such an engine is referred here as a "parallel piston engine” (PP engine), in view of the parallel arrangement of pistons with respect to the drive shaft.
  • PP engine parallel piston engine
  • the PP engine of the invention is advantageously a PP engine of the type disclosed in WO2007/033441 , with combustion chambers having excentric portions or with combustion chambers having similar portions in which the pistons are moving.
  • the PP engine of the invention can thus have one or more of the characteristics of the known PP engines.
  • the swash plate of figure 1 is a swash plate for a fuel engine, said fuel engine comprising as preferred embodiment, advantageously at least:
  • the elements of the first and second parts are adapted so that the center of gravity of the swash plate is located at the intersection point of the axis C-C of the holes for the drive shaft with the axis B-B of the central hole 47H of the ring 47.
  • the swash plate 20 of the invention has one or more of the following characteristics :
  • the invention relates also to a fuel engine as disclosed here above, which can be of the type disclosed in WO2007/033441 or which can be of the type with pair of aligned pistons having co-axial rods.
  • the envelope 7 forms recesses 7A,7B for receiving tube elements 85A,85B intended to form the combustion chambers 85',85" in which are moving the pistons 2',2",3',3".
  • the envelope 7 is formed by two shells 7E1, 7E2 which are attached together for forming inner chamber for receiving the tube elements, the pistons, the swash plates and the drive shaft, as well as for forming channels 7C for a cooling liquid, and channels for the passage of air into the combustion chambers or for the exhaust of combustion gases.
  • the PP engine according to the embodiment comprises an engine block 7 provided with two combustion chambers in each of which a pair of pistons are moving.
  • the wall of the combustion chamber or of the tubular elements 85A,85B can in an advantageous embodiment be coated with a ceramic layer or can be made in a ceramic material.
  • Other material, such aluminium containing alloys are also suitable, even if ceramic is preferred.
  • tubular elements it is possible to use another alloy for the shells 7A,7B, than for the tubular elements 85A,85B.
  • the number of pistons in a PP engine according to the present invention is preferably a multiple of two e.g. 2, 4, 6, 8, 10, 12, 14 or 16 or even more (number of combustion chambers 1,2,3,4,5,6,7or 8, or even more).
  • the PP engine as comprising 2 pairs of cylinders (i.e. 4 pistons).
  • the combustion of the fuel mixture in each combustion chamber 85',85" proceeds by known means and is not elaborated here.
  • the ignition can be operated or controlled by a spark plug, by compression, and/or by any other means.
  • each piston 2', 2", 3' and 3 is rigidly connected to a piston rod 10.
  • the piston rod 10 is associated to a slide block 11 connected to a coupling element 19.
  • the pistons 2',2",3',3" transmit force, via rods 10 and slide blocks 11 to the spherical coupling elements 19, pertaining to the swash plates represented by the general reference 20', 20".
  • the driving shaft 29 may be coupled to the end of the engine block distal to the flywheel by ball bearing coupling 30, and at the end proximal to the flywheel by means of a smooth bearing 32.
  • the flywheel 33, attached to the latter end of the drive shaft 29 may comprise two coaxial elements 34 and 35 as disclosed in WO2007/033441 .
  • the ends of the tubular elements 85A,85B are closed by a plug 85P with a central passage for the rod 10.
  • the plug 85B is formed by two parts, which are advantageously identical.
  • the pistons 2', 2" and 3', 3" and the slide blocks 11 move in a linear mode, parallel to the central axis A-A of the shaft 29.
  • tubular protrusion 48A3 of the swash plate 20,20' are advantageously associated to a bearing 20B placed in a recess of the envelope 7. This is quite advantageous for avoiding vibrations at high speed.
  • the bearing system 49 comprises bearing cylindrical or frustoconical elements having each an axis of symmetry forming an angle comprised between 75° and 105°, advantageously between 75° and 89° and between 91° and 115°.
  • the bearing system 49 acting as abutment for the first end 47A of the ring has cylindrical or frustoconical bearing elements with an axis of symmetry forming a first angle y comprised between 75° and 89° with the axis of symmetry of the considered ring, while the bearing system 49 acting as abutment for the second end of the ring has cylindrical or frustoconical bearing elements with an axis of symmetry forming a second angle ⁇ comprised between 75° and 89° with the axis of symmetry Y-Y of the ring, whereby said first and second angle are measured from the side of the axis of symmetry comprising a crossing point CP of the axis of symmetry YY with a line prolongating the frustoconical portion of the ring.
  • the ring 47 bears three spherical coupling elements 19 distant the one with respect to the other with an angle of 120°. Each coupling element is attached to the ring by a collar 22. Ring 47 is coupled to a central boss 48', 48" and is able to rotate relative to the boss 48', 48" by way of a first bearing 49 and a second bearing 50 disposed either side of said ring 47. Said first 49 and second 50 bearings are preferably needle bearings.
  • the central boss 48 has a frustoconical portion maintained in position within opening of the ring 47 by a cap element 48A.
  • the cylindrical or frustoconical elements can be made up of two or three coaxial elements. This provision is designed to take account of the variations in angular velocity which these elements undergo when one considers the rotation of the central boss 48 compared to the ring 47.
  • PP engines suffer from wear of the swash plate owing to the forces applied between the joints which translate the lateral movement of the pistons into rotational movement by the drive shaft. Improvements to the design of the swash plate by the present inventor have surprisingly lead to a better distribution of forces within the swash plate bearings, which improvements do not require more heavily engineered components, or more substantial bearings.
  • the ring (47) is mounted rotative along an axis B-B with respect to the central assembly (48) and the drive shaft 29, by means of at least two bearings (49,50), whereby said axis forms an angle with the central axis of the drive shaft (29).
  • the axis of rotation B-B (also axis of symmetry of the opening) of the ring 47', 47" forms an angle comprised between 10° and 50°, advantageously between 15° and 40°, preferably about 20°-25° with respect to the central axis of the drive shaft (29).
  • the engine of the invention provides advantageously a lubrication system as a series of internal channels provided in the components of the most active joints.
  • the spherical coupling elements of a swash plate, the ring, the connected boss 48',48", the drive shaft 29, seating members 18', the connected piston rod 10, and the piston head comprise one or more internal channels for the passage of lubricating oil.
  • the channels between at least two of the aforementioned components may be connected, where and when appropriate. Where two of the aforementioned components are cooperatively connected and move relative to each other during running of the engine, said components may be configured to temporarily connect where appropriate. Such temporary connection of channels may be achieved, for example, when the respective channels align momentarily as one component moves past the other (e.g. as seen in the movement of the spherical coupling element 19 across the seating member 18')
  • Ceramic coatings over the surface of joints is preferred, said ceramic coating being used in addition to oil lubrication or as an alternative to oil lubrication. Such coatings are known in the art, and allow reduced-friction movement of joints without the need for lubricant. Ceramics have properties of being hard wearing and resistant to heat, and as such are suited as coatings of engine parts.
  • the piston ring can be a piston ring as disclosed in WO2007/033441 .
  • the engine is provided with a mechanically driven compressor coupled to a ring of a swash plate.
  • a compressor is disclosed in figure 6 of WO2007/033441 , said compressor being suitable for injecting a gas mixture into the combustion chamber when required.
  • the compressed mix air/fuel of the compression chamber is, for example when reaching a sufficient pressure, then conducted towards a fuel injection point of a burning chamber.
  • the pistons have each a piston head surface provided with an indent which is deeper towards the centre of the piston head surface.
  • the indent changes the force-receiving characteristics of the piston head surface so that the energy generated by the explosion is more evenly distributed. There is a reduction in sideways knocking, and local wear.
  • the space 38 between elements 34 and 35 of the fly wheel 33 can be changed by the user.
  • the element 34 can be provided with a set of bolts which are configured to move the element 34 away from element 35, so changing the volume of the space 38.
  • the boss 48 of swash plate 20 abuts the transverse face of the cylindrical body 39 which forms a unit with the element 35 of the fly wheel 33.
  • the swash plate 20 can be moved in the direction of the arrows 46' or 46" to vary compression between pistons 2,2' and 3, 3'. This adjustment allows the engine to be used with different types of fuel (e.g. petrol, diesel, ethanol, LPG etc).
  • fuel e.g. petrol, diesel, ethanol, LPG etc.
  • the engine may be provided with a turbocharger.
  • the turbo charger supplies additional air to the combustion chamber allowing a more efficient fuel combustion.
  • the timing of pistons can be set so that one piston in an opposing set moves in advance of another.
  • the advance of the piston 2" in the chamber disposed with exhaust ports is more than 0°, such as about 1°, 2°, 3°, 4°, 5°, 6°, 7°, 8°, 9°,10°,11°, 12°,13°,14°,15°,16°,17°,18°,19°, or 20° advanced.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Reciprocating Pumps (AREA)
EP15075001.6A 2015-01-23 2015-01-23 Plateau oscillant pour un moteur à carburant Active EP3048245B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP15075001.6A EP3048245B1 (fr) 2015-01-23 2015-01-23 Plateau oscillant pour un moteur à carburant

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP15075001.6A EP3048245B1 (fr) 2015-01-23 2015-01-23 Plateau oscillant pour un moteur à carburant

Publications (2)

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EP3048245A1 true EP3048245A1 (fr) 2016-07-27
EP3048245B1 EP3048245B1 (fr) 2019-08-21

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Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB190930304A (en) * 1908-12-29 1910-03-24 Carl Beckmann Improvements in Multiple Cylinder Internal Combustion Engines.
GB190401A (en) * 1922-03-17 1922-12-21 John Otto Almen Improvements in or relating to internal combustion engines
US4202251A (en) 1977-05-12 1980-05-13 S.E.C.A. Societe Anonyme Societe d'Entreprises Commerciales et Aeronautiques Generator for flow rate of pressurized fluid
EP0052387A1 (fr) 1980-11-17 1982-05-26 Marcel Geirnaert Moteur comportant au moins un piston à mouvement de translation linéaire et plateau oscillant destiné à un tel moteur
EP0060822A1 (fr) * 1981-03-13 1982-09-22 S.E.C.A. Société d'Entreprises Commerciales et Aeronautiques Société anonyme Moteur à mouvement linéaire et plateau oscillant pour un tel moteur
US4986226A (en) * 1990-01-22 1991-01-22 Lacy James W Internal combustion engine
FR2658561A1 (fr) * 1990-02-19 1991-08-23 Vachoux Andre Moteur thermique alternatif a transmission de mouvement par came inclinee.
WO1997019254A1 (fr) * 1995-11-20 1997-05-29 Q-Tre Pty. Ltd. Moteur a disque en nutation
WO2007033441A1 (fr) 2005-09-23 2007-03-29 Van Rossem, Gerrit-Jan Moteur comprenant des pistons alignes parallelement a l'arbre de transmission
WO2011035778A1 (fr) * 2009-09-24 2011-03-31 Ernst Beck Moteur à expansion de gaz
WO2012056392A1 (fr) * 2010-10-26 2012-05-03 Duke Engines Limited Machines à pistons axiaux

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB190930304A (en) * 1908-12-29 1910-03-24 Carl Beckmann Improvements in Multiple Cylinder Internal Combustion Engines.
GB190401A (en) * 1922-03-17 1922-12-21 John Otto Almen Improvements in or relating to internal combustion engines
US4202251A (en) 1977-05-12 1980-05-13 S.E.C.A. Societe Anonyme Societe d'Entreprises Commerciales et Aeronautiques Generator for flow rate of pressurized fluid
EP0052387A1 (fr) 1980-11-17 1982-05-26 Marcel Geirnaert Moteur comportant au moins un piston à mouvement de translation linéaire et plateau oscillant destiné à un tel moteur
EP0060822A1 (fr) * 1981-03-13 1982-09-22 S.E.C.A. Société d'Entreprises Commerciales et Aeronautiques Société anonyme Moteur à mouvement linéaire et plateau oscillant pour un tel moteur
US4986226A (en) * 1990-01-22 1991-01-22 Lacy James W Internal combustion engine
FR2658561A1 (fr) * 1990-02-19 1991-08-23 Vachoux Andre Moteur thermique alternatif a transmission de mouvement par came inclinee.
WO1997019254A1 (fr) * 1995-11-20 1997-05-29 Q-Tre Pty. Ltd. Moteur a disque en nutation
WO2007033441A1 (fr) 2005-09-23 2007-03-29 Van Rossem, Gerrit-Jan Moteur comprenant des pistons alignes parallelement a l'arbre de transmission
EP1770260A1 (fr) * 2005-09-23 2007-04-04 Van Rossem, Gerrit-Jan Moteur à combustion avec pistons alignés parallèlement à l'arbre d'entrainement
WO2011035778A1 (fr) * 2009-09-24 2011-03-31 Ernst Beck Moteur à expansion de gaz
WO2012056392A1 (fr) * 2010-10-26 2012-05-03 Duke Engines Limited Machines à pistons axiaux

Also Published As

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