25/04/2010 : How to mount the parts of the MPRBC and to understand its options and working ? 10/01/2010 : Why is the MPRBC simpler and more efficient than a conventional engine ? 28/12/2009 : Does a prototype of MPRBC exist and what are its mass and sizes ? 01/10/2009 : How works the MPRBC engines in simple words ? 06/08/2009 : What are the advantages and coherence of the POGDC concept, linked with the MPRBC ? 17/04/2009 : What are the main assets of 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 ?
HOW TO MOUNT THE PARTS OF THE MPRBC AND TO UNDERSTAND ITS OPTIONS AND WORKING ?
SYCOMOREEN is showing you the assembly part by part and the progressive working
of a Rotary Pistons Machine with Controlled Beating (MPRBC). The MPRBC is
a volumetric motor with a pressurized fluid or a pump by giving it mechanical
WHY IS THE MPRBC SIMPLER AND MORE EFFICIENT THAN A CONVENTIONAL ENGINE ?
SYCOMOREEN offers you a full immersion through the MPRBC's kinematics. It is especially simple, efficient and robust because its mechanism only needs pivoting joints inside ball-bearings (very little rubbings).
Thanks to an elaborate mathematical theory, the versions with rotary multilobed central cam allows any law of beating for the rotary pistons according to the cam's angle of rotation (fully customizable kinematics)
; optionally, to overmultilob the rotary cam multiplies the nominal
compactness of the machine, by making it inhale much more fresh air
during one revolution of the cam.
the MPRBC's sophisticated mathematical theory is constrasting with
their technical realization which is flexible, simple and economic,
whereas the conventional engines with pistons/rods/crankshaft which
choose to be theoretically poor and entails manufacturing difficulties
and narrow parametrizations.
DOES A PROTOTYPE OF MPRBC EXIST AND WHAT ARE ITS MASS AND SIZES ? SYCOMOREEN has recently published the commented photos of a MPRBC prototype
This MPRBC has an intrinsic capacity of 1150 cm3 and comes from the 4 x 20 law :
20 cm x 20 cm x 20 cm for 20 kg
2 rounds of a bilobed rotary central cam, it inhales 2300 cm3 of fresh
air in 4-times cycle, what lets to foresee commercial engines of
200 HP (machined and managed with the current know-how of the
automotive world and of the motorists), but it leads also to
pumps/compressors, or hybrid machines (motocompressor or motorecovering device of kinetic energy while pneumatically storing/unstoring pressurized air). To see also all the applications of MPRBC engines
HOW WORKS THE MPRBC ENGINES IN SIMPLE WORDS ? The start comes from the rotary pistons in alternate
motion. Then the pendulums move the grooves, and finally the grooves
actuate via some
ball-bearings a special mathematic rotary cam*. Sycomoreen proposes you
to see it in this movie showing its last re-engineered
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 ensue
of a 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 density of 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 adjust 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.
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,
Co-author 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 ;
rooms' deactivations ; Variable room management ; direct injection ;
exhaust gases recirculation (EGR) ;
Controlled Auto Ignition (CAI) ; various compression ratio (VCR) ; non
conventional motor concepts