SYstems for COnversion of MOtions and REnewable ENergies
POGDC's FAQ
 Frequently asked questions 
Octogonal Piston with Controlled Deformable Geometry

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06/08/2009 : What are the advantages and coherence of the POGDC, concept, linked with the MPRBC ?
05/10/2008 : The global warming and the next energetic krach. Quid of transportation ?
30/05/2008 : Why are SYCOMOREEN's motor concepts so new and promising?
25/04/2008 : What are the main present stakes in the world of the internal combustion engines ?


06/08/2009_______________________________________________________________________________________________________________________________
WHAT ARE THE ADVANTAGES AND COHERENCE OF THE POGDC, CONCEPT, LINKED WITH THE MPRBC ?

The claims of patent "Piston Octogonal à Géométrie Déformable Contrôlée" (POGDC's zip in French), set down by SYCOMOREEN since February 2009, unveils a radically new engine, useful as a motor and/or pump of which the kinematics and the remarkable features ensued from a set of technical requirements and of principles of design. Here is a synthesis of it in 8 points:
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1. The POGDC engines are at same power at least 4 times more compact than traditional engines with pistons rods and crankshaft, or also at same volume, 4 times more powerful.

Waited Goal(s) : ultracompact motor, notably for hybrid architectures, special engines with high specific power (aeronautics, military vehicles or for competition).
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2. The POGDC engines require about 20 kg of usual steel per liter of cubic capacity.

Waited Goal(s) : drastic reduction of the manufacturing costs through the savings of raw materials and construction with low CO2 emissions.
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3. The POGDC engines have preferably valves with rotary obturator, allowing a full section out-flow of the gases with a new mechanism offering an entirely controlled variable valves' timing in phase and in lift.

Waited Goal(s) : reduction of the consumption by optimizing the breath of the engine or by achieving cycles with over-expansion  (notably the Miller's cycle) without changing the main motorizing mechanism.
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4. The POGDC engines optionally get small additional pistons to vary the compression rate (VCR) on a range going from 5 to 25. These pistons preferably carry the injector and/or the sparking plug (see also the notice of 27/04/2009).

Waited Goal(s) : optimization of the combustion for any RPM, especially for overfed engines. Downsizing and reduction of the specific consumption.
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5. The POGDC engines convert their motion with special cams and profiles possibly over-multilobed

Waited Goal(s) :

  a) To multiply the compactness (defined at the 7th shortcoming) , by increasing the number of motorizing cycles required for one revolution of the most first rotary shaft of the engine.


   b) To finely control the volumes of the rooms, and thus the variations of temperature and pression at the times of compression : it opens new perspectives as well for conventional combustion (gasoline or Diesel) than for not conventional (Controlled Auto Ignition / CAI, High Charge Compression Ignition / HCCI, hybrid cycle / "Diesotto")

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6. The POGDC engines are intrinsically and naturally well balanced.

Waited Goal(s) : to get power on high RPM, no vibrations, less and even no shock absorbers and parasitic noises.
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7. The POGDC engines allow to change nearly continuously the volumic capacity by combination of active/shut down rooms.

Waited Goal(s) : reduction of the consumption by turning off a maximum of chambers in order to put those which remain active at an optimum of specific consumption, whatever the load of the engine.
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8. The not rotary POGDC engines are combining themselves advantageously with until 4 rotary pistons machines with controlled beating (MPRBC), which answer to the same specifications' overview as the POGDC machines. Several combinations of POGDC/MPRBC are possible with rotary over-multilobed cams.

Waited Goal(s) : to get a wide range of engines coming from a small set of standardized parts, big series breaking the costs and to increase the compactness of the motor.


05/10/2008 _______________________________________________________________________________________________________________________________
Ecouter Europe 1 ! THE GLOBAL WARMING AND THE NEXT ENERGETIC KRACH. QUID OF TRANSPORTATION ?

SYCOMOREEN
invites you to listen to the radiobroadcast
at November, 13th 2006 of Europe 1 animated by Jacques PRADEL
(in French) and  proposes you to read the Sycomorren's commented summary of it

to listen to the Europe n°1's  radio broadcast (French)

Invited :

Marie Odile DELACOUR
independant Journalist, Author of "Climat : la Grande Menace" [Climate : the Big Threat]
Jean Marc JANCOVICI, Consultant & Engineer, 
Specialist of climate and energetic issues,
                                     Coauthor of "Le Plein s'il vous plait !" [
Full Tank, please !]

30/05/2008 _______________________________________________________________________________________________________________________________
WHY ARE SYCOMOREEN'S MOTOR CONCEPTS SO NEW AND PROMISING?

SYCOMOREEN invites you to read this note : "synthesis motors and perspective"


25/04/2008 _______________________________________________________________________________________________________________________________ 
WHAT ARE THE MAIN PRESENT STAKES IN THE WORLD OF THE INTERNAL COMBUSTION ENGINES ?
 
Extrait de  
  ||     Extracted from
http://www.auto-innovations.com/
Aller voir l'interview complète || To see the full Interview (only in French)
Mots-clé français de l'interview
réduction de taille du moteur ; désactivation de chambre de combustion ; gestion variable de chambre ; injection directe ;
recirculation des gaz ;  auto allumage contrôlé ; taux de compression variable ; concepts moteurs non conventionnels


English key words of the interview :
 downsizing ; chambers' deactivations ; Variable management of a chamber ; direct injection ; exhaust gases recirculation (EGR) ;
Controlled Auto Ignition (CAI) ; various compression ratio (VCR) ; non conventional [unusual] concepts of motor

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SYstems for COnversion of MOtions and REnewable ENergies
POGDC's FAQ
 Frequently asked questions 
Octogonal Piston with Controlled Deformable Geometry