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 ?
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:
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).
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.
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.
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.
5. The POGDC engines convert their motion with special cams and profiles possibly over-multilobed
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")
6. The POGDC engines are intrinsically and naturally well balanced.
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 _______________________________________________________________________________________________________________________________ THE
GLOBAL WARMING AND THE NEXT ENERGETIC KRACH. QUID OF TRANSPORTATION ?
Marie Odile DELACOUR, independant Journalist, Author of
"Climat : la Grande
Menace" [Climate : the Big
Threat] Jean Marc JANCOVICI,
Consultant & Engineer, Specialist
climate and energetic issues,
Coauthor of "Le
vous plait !" [Full Tank,
MOTOR CONCEPTS SO NEW AND PROMISING?
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
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