Piston Octagonal in Deformable Controlled Geometry (POGDC)

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Create the movement from one energy source, convert it into another more useful thanks to a suitable device, while having a good performance and respecting the environment,

these are the challenges facing SYCOMOREEN.


The PRBC and POGDC Machines do not come from "eccentric and spontaneous ideas of mechanism", but from a extremely in-depth theory on motor issues, aiming to identify design rules tending towards machines which must respect draconian specifications and perfectly suited to the needs of most vehicles modern motorized.

Le Octagonal Piston with Controlled Deformable Geometry (POGDC) is a concept whose first pen strokes and calculations date back to December 2002, a time when your humble servant Remundo was finishing his engineering studies at French Institute for Advanced Mechanics. The "motor and pump" projects are projects launched on a personal initiative since that date.

Its publication is therefore done 6 years later. This period is long, but such reflections cannot be made in a few months because they require a particularly demanding ripening. In addition, all this research is done in parallel with my professional activity (Associate Professor of Physics and Chemistry in Preparatory Classes for the Grandes Ecoles of Engineers) ...

Online http://sycomoreen.free.fr, so today the POGDC machine is also revealed on your forum prefer.

OCTOGONAL PISTON WITH CONTROLLED DEFORMABLE GEOMETRY


The patent was filed on February 19, 2009 at INPI Paris. The POGDC has the distinction of having very many variants, including an entirely new and promising version of the ultra-compact rotary motor type .

For the time being, we are publishing the full text of the patent here, without the claims for legal and intellectual property reasons.

You will soon have access to all the figures, animated gifs and descriptions on econoology.

We await your reactions on this new machine usable as well in pump / compressor as motor.

For now, we are only developing our machines, but are open to any industrial partnership proposal.

Good reading and discovery!

Remundo

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FIG. 1A illustrates in perspective an octagonal piston with deformable geometry (POGD) with rounded piston heads,

FIG. 1B shows in exploded perspective an octagonal piston with deformable geometry (POGD) with rounded piston heads,

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Octagonal piston machines with controlled deformable geometry

The invention (POGDC) relates to a machine comprising a piston articulated in 8 coplanar parts (TPA, BA, TPB, BB, TPC, BC, TPD, BD), forming a bi-regular plane octagon which can be used in rotary or no. Eight axes of rotation orthogonal to this plane, possibly produced by pins (GO1, GO2, GO3, GO4, GO5, GO6, GO7, GO8), systematically place 2 consecutive pieces of the octagonal piston in pivot connection.

The invention (POGDC) constitutes a motor capable of producing mechanical work under the pressure of a fluid, or a pump capable of transferring or pressurizing a fluid. When the device constitutes an engine, the pressurized fluid can be obtained, in particular, by a column of liquid, by a reserve of compressed air or by the combustion of a fuel. When the machine constitutes a pump, it must be supplied with mechanical energy which is then communicated to the compressed and / or transferred fluid.

The invention (POGDC) is part of the family of volumetric machines for which the variations in volumes are generated by the deformation of a polygon whose sides are articulated and with a fixed center distance. More precisely, these machines operate thanks to the deformation of a polygon according to 3 rules:
1. the length of each side remains constant,
2. the angles of the polygon are variable on at least 4 of its vertices,
3. the angular variations are periodic.

The articulations of the articulated piston of these machines are all orthogonal to the same plane and form the vertices of a polygon which makes it possible to delimit at least one chamber of variable volume, sometimes using a peripheral casing.

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FIG. 1C illustrates in perspective an octagonal piston with deformable geometry (POGD) with 2 truncated piston heads and 2 other grooves,

FIG. 1D shows in perspective an octagonal piston with deformable geometry (POGD) with 4 piston heads equipped with rectangular sections to form optional peripheral chambers (COP),

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Current state of the art

Until now, research and achievements were mainly focused on quadrilateral machines (4 articulated parts), often of the non-rotary parallelogram or deformable rotary diamond type.

Thus, one can retain as typical examples of the field of the invention:
- Patent FR2651019 by Rumen ANTONOV (deformable non-rotating parallelogram).
- the series of concepts on deformable rotary diamond machines (MRLD), in particular and in chronological order:
o FR1386505A issued to Guy LAURENCIN in 1964
o FR1376285A issued to Pierre MAGNENET in 1964
o DE1551118A1 requested by Alfred JORDAN in 1967
o FR2235268A1 requested by Ignacio MARTIN ARTAJO in 1973 in Spain
o FR2493397A1 requested by Jean-Pierre AMBERT in 1980
o DE19901110 A1 issued to Herbert HÜTTLIN in 2000
o the QUASITURBINE series of patents of the SAINT HILAIRE family (Quebec), in particular US 6,164,263 and US 6,899,075, B2

These different machines have remarkable characteristics which it is useful to describe here to highlight the technical interest and novelty of the “Octagonal Piston Machine with Controlled Deformable Geometry”, which will be abbreviated as “POGDC machine” thereafter and designated by "POGDC" in the figures.

Patent application FR8023551 from Jean-Pierre AMBERT describes a rotary deformable diamond machine delimiting 4 peripheral chambers using a calculable casing with a mathematical and configurable formula (the casing profile is given by an analytical formula).

Licences QUASITURBINE from the SAINT HILAIRE family describe a rotary deformable diamond machine delimiting 4 peripheral chambers using a housing calculated by iterations on a computer: according to its designers, the housing profile is obtained by an iterative algorithm leading to a sufficiently precise digital solution providing advantages in terms of volumetric variations, especially at top dead center.

Patent DE19901110 A1 of Herbert HUTTLIN describes another approach to a deformable rotary diamond concerning its guidance, produced both by a fixed asymmetrical central cam and a peripheral casing.

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FIGS. 2A and 2B show the integration of a piston (POGD) of FIG. 1C in a peripheral casing with slides (CPG),

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Patent FR2651019 by Rumen ANTONOV describes a swaying parallelogram machine actuated by 2 rotating eccentrics, each mounted in pivot connection on one of the 2 opposite vertices of said parallelogram. This allows a central chamber to be obtained, the volume of which is generated by the beat of the parallelogram actuated by the eccentrics in continuous rotation.

These machines suffer from technical difficulties:
- the MRLD concepts have:
o a low volume compared to their size,
o a limited torque due to the fact that the result of the pressure forces on the sides of the diamond as well as the normal reactions of the peripheral casing on the vertices of the diamond point almost to the center of rotation of the motor,
o the impossibility of operating the central chamber because its volume is almost constant: the central space is therefore not sufficiently valued,
o blades which are sometimes quite delicate and costly to manufacture because of their complex shapes.
- the ANTONOV concept with a moving parallelogram:
o has a low volume compared to its size,
where is difficult to balance and thus generates harmful vibrations in order to extract power therefrom at high speed of rotation,
we have no peripheral rooms.

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FIGS. 2C and 2D illustrate the integration of a piston (POGD) of FIG. 1D in a peripheral casing with slides (CPG) with chambers (COP),

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All of these machines also kinematic constraints :

- on the MRLD concepts, the recovery of the movement on the center of the blades is not homokinetic, because the blades joining the centers on 2 non-consecutive sides are animated by a movement of periodic separation / reconciliation ("cat and mouse" movement) ); this also led the SAINT HILAIRE to propose in patent US 6,164,263 the use of differential devices, unfavorable in terms of inertia, size, efficiency and costs,
- the concept with a moving parallelogram has totally constrained kinematics as soon as the eccentricities of the rotary shafts, their phase shift and the lengths of the sides of the parallelogram have been chosen.

Thus, for all these machines, it is not possible to control at will the movement of the deformable piston as a function of the angle of rotation of the motor shaft. In particular, the volume of the top and bottom dead centers is not finely controlled. This has two important disadvantages:
- on the one hand, the bottom and top dead centers can be too long, which causes pollution with nitrogen oxides NOx and thermal leaks towards the cylinder head,
- on the other hand, this non-chosen kinematics is generally incompatible with the current concern of developing new combustion modes more economical in fuel of the CAI (controlled auto ignition) or HCCI (high charge compression ignition) type where the kinematics instead of being a constraint, must become an asset in managing the pressure increase, which itself triggers the detonation in the combustion chambers.

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FIGS. 2E and 2F are respectively exploded and side views of FIG. 2A,