# Piston Octagonal in Deformable Controlled Geometry (POGDC)

Tips, advice and tips to lower your consumption, processes or inventions as unconventional engines: the Stirling engine, for example. Patents improving combustion: water injection plasma treatment, ionization of the fuel or oxidizer.
Remundo
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posts: 16917
Registration: 15/10/07, 16:05
Location: Clermont Ferrand
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The series (2,6,10,14,18…) lobes is remarkable because it allows with a single central rotary multi-lobed cam to be constantly in contact with the 4 rollers (GALA, GALB, GALC, GALD) of all the heads of piston (TPA, TPB, TPC, TPD).

FIG. 7A illustrates the kinematic skeleton of a machine (POGDC) according to the invention in its "peripheral rotation casing" version.

Figures 7B and 7C show the orthogonality of the medians of the short sides of the octagonal piston with deformable geometry (POGD) guaranteed by alignment rollers (ALIA, ALIB, ALIC, ALID), the power rollers (GALA, GALB, GALC, GALD ) and possible stops (BUTA, BUTB, BUTC, BUTD) possibly rectangular. The rollers will preferably be mounted on bearings to limit friction, the stop allowing them to be protected and / or lubricated.

FIG. 7D presents an intersecting path for the rollers making it possible to reduce the rotational movement of the medians of FIG. 7A by a factor of 2, which requires 8 lobes of intersecting paths. FIG. 7E illustrates the intersecting path rotor which results therefrom with rollers of necessarily non-zero diameter.

FIGS. 7F, 7G, 7H and 7I represent variants of FIG. 7E with a reduction in the speed of rotation by a respective factor 3, 4, 5 and 6, which requires 12,16,20 and 24 lobes respectively. intersecting paths. A reduction factor of up to 4 or 5 is technically possible.
Last edited by Remundo the 07 / 03 / 09, 15: 10, 1 edited once.
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Remundo
Moderator
posts: 16917
Registration: 15/10/07, 16:05
Location: Clermont Ferrand
x 5604

Overmultilage on rotary POGC is also possible. It requires central cams with overlapping overlapping paths (CES)

Small overview: the CES turns (blue) 2 times slower than the POGD (green medians):

this requires 8 lobes for the blue cam (CES)

Another little overview: the CES turns (blue) 4 times slower than the POGD (green medians):

this requires 16 lobes for the blue cam (CES)

We can thus multiply the intrinsic compactness of the rotary POGDC (already very high: minimum 4 times that of a piston engine) by a factor k, reasonably between 2 and 5 (theoretically, we can go even further, but the CES overlap due to the width of the roller)

a rotary POGDC has an intrinsic compactness of factor 8 and therefore potentially has factors of more than 10 for power with the same motor volume, in comparison with the piston engine, connecting rod, crank.
Last edited by Remundo the 07 / 03 / 09, 12: 56, 2 edited once.
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Remundo
Moderator
posts: 16917
Registration: 15/10/07, 16:05
Location: Clermont Ferrand
x 5604

All messages are in place now.

Anyone can post their comments while I complete the messages intended for the insertion of images and animations, and while I arrange the text layout.

The site http://sycomoreen.free.fr is already operational for all this.

See you soon !
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Woodcutter
Econologue expert
posts: 4731
Registration: 07/11/05, 10:45
Location: Mountain ... (Trièves)
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Pfiouuuu!
Anyone have aspirin?

Bravo for all this work in any case!
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"I am a big brute, but I rarely mistaken ..."
Flytox
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posts: 14150
Registration: 13/02/07, 22:38
Location: Bayonne
x 852

Hello Remundo

Kolossal work .... .
For me too, you will need an aspirin box
A+
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Reason is the madness of the strongest. The reason for the less strong it is madness.
[Eugène Ionesco]
http://www.editions-harmattan.fr/index. ... te&no=4132
jam
Éconologue good!
posts: 395
Registration: 17/12/07, 21:53
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WOW
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Remundo
Moderator
posts: 16917
Registration: 15/10/07, 16:05
Location: Clermont Ferrand
x 5604

Hello friends,

Thank you for these encouragements. I took actions at Efferalgan

For speed, I can't slow down unless I generate new animations. Each animation contains on average 20 images assembled one by one ...

I'm going to fix the text.
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jam
Éconologue good!
posts: 395
Registration: 17/12/07, 21:53
x 27

No speed problem here.
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Remundo
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posts: 16917
Registration: 15/10/07, 16:05
Location: Clermont Ferrand
x 5604

Hi Jam, I think the speed is adequate.

Otherwise, here is a 1650 cc non-rotating POGDC on 3 crankshaft turns

Technological choices:
* Movement conversion mechanism: Sinus type
* Gas ​​exchanges: 10 Variable valve timing fully controllable in phase and opening (5 in exhaust, 5 in intake)
* Compression ratio: continuously adjustable compression ratio between 5 and 25 on each chamber

Housing dimensions 29 x 29 x 10 cm
Power: around 115 Ch on the basis of 70 Ch./L of displacement.
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Remundo
Moderator
posts: 16917
Registration: 15/10/07, 16:05
Location: Clermont Ferrand
x 5604

What is the compactness of an engine in the sense that SYCOMOREEN defines it in the specifications?

This is the report

volume of air sucked in 2 turns of the premier rotated tree
_____________________________________________________
typical engine volume (excluding accessories), but with all the kinematics required for its operation.

So with the volume of a housing 50 (width) x 50 (height) x 25 cm (depth) = 40 cm000 typical of a 3 cm1,400 petrol engine,

The typical compactness is 1400 / 40 = 000

For the POGDC 1650 cm3 presented, the volume occupied by the casing + kinematics is approximately: (cross dimension) ²xdepth = 9000 cm3. 1650/9000 = 0.185

More precise calculations conclude with a compactness of 0,18

0.18 / 0.035 = 5.15

Either a motor more than 5 times more compact at given power.

or an engine more than 5 times more powerful at a given volume.

Multi-lobed rotary cams further multiply this compactness by an integer greater than or equal to 1 depending on the number of lobes.
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