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.
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by Remundo » 02/04/09, 13:17

History and Genesis of POGDC / MPRBC Engines (after)

Episode 3: The professional changeover and the bases of the "motor problem"

From February to the end of June 2003, I held a position as a trainee maintenance engineer in the 1st French group of electrolysis, casting and shaping of aluminum, which is gradually becoming American-Canadian because it is being eaten because of a hostile stock market takeover; this is not conducive to enthusiasm among employees.

I am assigned to the heavy plate workshop, intended to produce thick and long sheets for aeronautics, with expertly crafted aluminum alloys. These sheets require heavy mechanical and also metallurgical operations, even after casting: this takes place in quenching and tempering furnaces. I know this workshop well because I worked there during the summer at the "S208" as a worker-riveter / trimmer on saws translating over 50 m and having capacities of about 30 cm thick.

When I arrived, pounds of documentation were piled up for two ovens: the F235 (quenching) and the F238 (tempering). The first is as big as a 3 or 4 storey building, the second is as long as 2 semi-trailers. The kingdom of excess.

The doc is just as disproportionate. Sometimes in English or German, you have to find the strategic pages (separate the ad and the pages without proven technical interest), classify and annotate them according to the habits of the factory. The kind of work that lingers and accumulates because reserved for interns or CDD since no employee on permanent contract does not want to do it ... except that it requires interns not too stupid and motivated for that; you don't find that much. : Idea: :?

I carry out my mission as best as I can: I keep asking the necessary questions to the experienced technicians, then become a labeling specialist. : Cheesy: I tell myself that I am having a good time because my Bac + 5 in mechanics will be decorated with a special mention "industrial documentalist". It's rare !

Next come the drafting of modop ', the implementation of routine maintenance campaigns (lubrication / rapid checks) and exceptional maintenance (monthly / annual review), the enrichment of the spare parts database (to reduce times to return to service in the event of a breakdown) and operational plans against industrial risks (pocri). It becomes less boring, but I am not overly passionate about it. :?

At the end of the internship, one of the technicians notices that I and my personal computer are forming a small traveling study office : Idea: (because no PC was free in the box, and I had to work…).

I hack a lot of things on my laptop. I have perfected my astroid engine layout program, I have CAD images in the background, and I am having fun doing the RdM study by finite elements of the rolling mill roll which just broke in an unusual place (a steel cylinder over 1 m in diameter and 4 m wide all the same). After examining the plans of the rolling mill, I try by modifying the supports, to cause the concentration of stresses where the part has cracked, to understand what may have happened and how to avoid it in the future.

The report that I drew from it had no echo at the time and must still take dust in the drawer where I left it ... I suspected writing the first line: there has no engineer having time for maintenance to discuss this lambda and atypical trainee report… and especially while I write this report and publish it, the whole workshop is buzzing, we have to change everything emergency on the rolling mill: extremely cumbersome and delicate procedure, a special crane is chartered.

For 2 or 3 weeks, the scheduling is in turmoil: the rolling mill is the heart of the workshop which has just stopped beating. The time is not for reflection, but for action.

To come back to this technician, he entrusts me, in agreement with my internship tutor, with the design of a maintenance cage intended to descend into the pits of the adjoining foundry, with the workers and equipment. He calls her the Raymondine to motivate me ... I simulate on my PC the deformations due to the weight with welded steel profiles, and give yet another report. But in my opinion, the Raymondine was never built afterwards ...

In fact, for 450 euros / month, the objective of my "employer" (not to say temporary exploiter) was to have, without any commitment or recognition, a guy like me who did the job and the prospective of a engineer + some base tasks. Guaranteed citrus press atmosphere and heralding the subsequent rebellion movement of highly qualified trainees in France, but that is another subject.

So, I do my job and more than my job, because otherwise boredom awaits me. I zap from one activity to another, eyeing the departure of a technician on "the field" in order to grab his PC on the fly to enter my data at full speed on the network and SAP software ... The top, c is when one of them leaves his vacation ... At least, there I can move forward: tapping and prioritizing endless references of motors, compressors, reducers, jacks, screws, cables, electrical sensors by the dozen ... Figures and Letters without the credits or Romejko! : Lol:

And the career prospects in all that… Frankly, I quickly felt that there was no possibility of hiring, and in any case, the work was not stimulating on the intellectual level.

In this gloomy routine tinged with immobility, you have to take charge. So imagine that my head is elsewhere: you are right. :P

Between 2 visits to the "guys" of the ovens, I'm going to hide in the back of the maintenance office; the portable placed on an antique drawing table while wrought iron, as immense as dusty, I escape in "the engine problematic".

I have compiled everything I have read and analyzed for about 4 years. Everything goes there: history fuel, use, hybridization, current and future challenges in connection with energy and technological developments and I also focus on technical flaws in the piston / connecting rod / crank architecture. Balancing fault, displacement very difficult to vary, variable setting coupled on all the chambers, valve lift and flow not very favorable for filling with fresh air, difficulty of having a simple VCR to optimize the supercharging ... et for me, the 2 main faults: too low compactness, inadequate kinematic law of the piston, especially at top dead center. An image to sum up the bubbling of ideas and analyzes ...
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Then, it is necessary to put order in all that, to prioritize, to characterize, to synthesize but not to forget anything… This gave a specification with 8 main functions associated with very high requirements, grouped in the specifications, currently published.

To summarize, the engine must be, in comparison to the piston engine, 4 times more compact at equal power, have power steps lower than 25% of the maximum power, have variable timing entirely controllable with possibility of permanent closing or opening , integrate an optional and flexible VCR that does not change the basic architecture, and be perfectly and intrinsically balanced. And above all it should only involve mechanical elements already known.

Here is the basis of work, and it seems to me too ambitious at the time to be achieved in all its aspects. But it is voluntary because I have to think big, to test this still nascent astroid concept. Challenge, innovation and daring even flirting with the impossible, but being aware of it: that was my state of mind at the time.

If sometimes my head is in the heights, I also have my feet on the ground. Every evening, I come home around 17 p.m. I put on a sugar yogurt, and before the evening meal, I systematically begin 1 to 2 hours of chemistry review. Amazing: I cram like a 20 year old kid when in less than a month I will be a “master engineer”, and that 6 months before, I was given lectures and role plays on charismatic management… : Lol:

Because we are in June 2003 and my decision is made: I leave the industry, but not the engineering to take all latitude to develop my personal and professional projects

I will therefore take the teaching competitions and will make my transdisciplinarity an asset to transmit my knowledge to other young people, just like before, other teachers have awakened my mind on so many things.
Last edited by Remundo the 08 / 04 / 09, 19: 47, 1 edited once.
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by Remundo » 03/04/09, 15:03

I continue, do not I continue?

What do you think :?: :P
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by jam » 03/04/09, 15:09

It is not finished?
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by Christophe » 03/04/09, 15:14

Remundo wrote:I continue, do not I continue?

What do you think :?: :P


Frankly I would rather you take one:
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And that you start working on prototypes ... in short, go to practice!

I don't think I'm the only one who thinks that ...
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by Remundo » 03/04/09, 15:40

No, it's not over. There are a dozen episodes, and the most interesting are coming : Cheesy:

For the adjustable wrench, I know some who have more effective ones than mine, with workers, technicians and engineers everywhere in the partially unemployed workshops.

However, I plan to go to the working prototype in a year or two. I started with the MPRBC, it's in progress.

Anyway, it should be noted that on the MPRBC / POGDC, the ball is less and less in my court. : Idea:
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by louphil » 03/04/09, 16:11

+ 1,

Yes, yes, it's very interesting Remondo, your novel, even fascinating, and since you write not too badly moreover, : Lol: , you can easily hang on !!!

But for the hyper-thermal trap, and above all, above all, for the trilobic stirling, is the ball still in your court ??? If yes, then put a priority with the wrench on it, I would undoubtedly be one of your first customers, and the future customer will get impatient !!!! :D :D :D
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by Remundo » 03/04/09, 22:38

Thank you Louphil, I have at least one reader who likes 8)

But you are absolutely right. On the PHRSD and the SPRATL, it is absolutely necessary to prototype. We got started on PHRSD and we will keep you posted.

Come on, to make you wait, Louphil, I'm going to put episode 4. :P
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by Remundo » 03/04/09, 23:04

History and Genesis of POGDC / MPRBC machines (after)

Episode 4: Preparation for Aggregation and the birth of the octagonal piston with deformable geometry (POGD)

At the end of June 2003, my application file was accepted for the preparation of Clermont Ferrand for the Agrégation de Sciences Physiques. It is directed by a teacher-researcher in particle physics, former student of the École normale supérieure (ENS). Professors from surrounding CPGEs participate, as well as University staff. A good provincial CAPES / Agreg prep that I recommend.

Accepted candidates receive indications and recommendations on the preparation process. In particular, you will need to be “preferably” up to date on the Maths Sup 'physics and chemistry program for the start of the new school year in September.

The summer will be hot, and it was, but not under the shirts, rather in the ciboulot. :P I put the gum and manage to be up to date at the beginning of July 2003. During August, I attack the SPE chime ... ouch :? .

During the heat wave of August 2003, I withdraw to 1200 m of altitude, in the middle of my calm mountains, because in plain, the heat makes intellectual work difficult.

Between 2 revisions, the astroid motor does not advance much, but is not in neutral. I distract myself, generally in the evening, to simulate the envelope and the movement of the diamond. : Idea:
Image

Then I watch 20 min Greg the Millionaire and Marjoram to respect the daily French summer dumbing quota :D before going to sleep where I dream of a virtuality TV show called “Agreg the Millionaire”…
: Mrgreen:

Ah, this spaghetti engine ... it's pretty, but even with Panzani, it doesn't work ... You have to give the pieces thickness so that they can withstand mechanical stresses . Problem: if we thicken the parts, there is a systematic collision at the joints, and even between the rods of the rhombus. That is to say that the kinematics is not viable in the state. : Idea:

Solution: double the pivot, to move from the diamond to the octagon. The octagonal piston with deformable geometry was born: cyclic sequence of 4 connecting rods and 4 piston heads forming a bi-regular octagon.
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For the moment, the motor is non-rotary: it is the initial astroid version, hereinafter referred to as “peripheral slide housing”. At the end of summer, I enrich my program on Maple: I trace and move all the pieces with thicknesses, including the housing.
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To manage the movement, the choice is oriented on a crankshaft without connecting rod, ie "a sinus mechanism".
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This is where I am in September 2003 on the deformable octagon astroid motor. I am happy with this octagonal kinematics which allows 4-stroke cycles, with a central chamber pulsating twice as fast as the peripherals
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On the other hand, the sine movement conversion mechanism does not enchant me because the horizontal / vertical rotors are not constant velocity: it is not dramatic, but it is not yet perfect for my taste. There is actually still a lot of design work to control the movement. : Idea:

I decided to let it settle, because the CAPES and Agrég competitions are in March and April 2004. The fateful deadlines are in 6 months, so this is not the time to disperse… :?

In September 2003, I showed up at Agreg 'in Clermont. I get to know the other preparers. Many wonder what I am doing there… :P Most of them have a university education, a few have known CPGE.

Some have already missed CAPES, some have just graduated with a master's (bac + 4), others have won a DEA and cannot find a job. Almost all of them have no experience in the industrial world; for some, a slight nonchalance betrays the nice university routine that they have lived for years. :P

As far as I'm concerned, it's the first time that I set foot in college, I'm a bit lost in the corridors, I take my marks without making any noise: some people think that I will either resign quickly or plant, and that they of course have more assets. A mechanical engineer, pretending to Aggregate in Physics and Chemistry? Weird, even incongruous ... I don't care and I trace my furrow.

The year starts on a hellish pace, it is necessary to prepare, assimilate and resume 2 to 3 lessons per week, of prep / license level. But also discover and understand cutting-edge themes that are new to me: statistical thermodynamics, quantum physics, special relativity, organic chemistry of PC / PC *… : Cry: And practice the practicals, confront the subjects of Aggreg and CAPES. Many people give up: preparing for the agrreg does not mean reading your course halfway 1 week before the partial and having forgotten it 1 week after… 8)

I hold on, I keep the rhythm; I pass for a curiosity among my comrades, and even teachers. However, my 'evaluations' are good and in constant progress. The teachers strongly encourage me. The more it goes, the more I feel that "it will do it". CAPES is at the beginning of March, the aggregation in early April.

At the end of February 2004, I give myself a good week of rest; I recover the Maple program left in the state since summer 1, the hack and get this animation:
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Arrive March and April 2004. My head is stuffed with physics and chemistry, wondering if it has not increased in volume ... and the writings of CAPES and Agrégation go well. Finally, I can breathe. Now I just need to come to practice the practicals and refine some lessons for the oral tests. I still have a lot of time to work on this motor with an astroid housing and a deformable octagonal piston… I am full of ideas, I quickly draw some CAD parts
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It is the end of a long tunnel and it is also spring when beautiful plants bloom…
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and ideas: for a few weeks I have been trotting in my head a "cylinder engine" with pivoting alternating bars, which could fit like a glove with the POGD ... : Idea:
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by Pascal HA PHAM » 06/04/09, 07:13

Hello Raymundo ....
:D
a little morning hello to tell you to continue.
Human history is constructed as follows: atypism, human peculiarities ...
lots of little bits of individual posturing and especially courage.
It is like a gigantic clock made up of billions of cogs which try to train as best they can.
The sciences and machines as you evoke there through your story can only awaken vocations in certain young readers.
: Lol:
But it's true, everyone says: we will have to move on to producing functional demonstrator prototypes.

So I continue to read you religiously,
until the end of spring and cogit in silence,
pending the summer of all future and beautiful achievements
8)
A+

Tryphon Sunflower.
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by Remundo » 06/04/09, 23:42

Hello Pascal Image

What pretty things in your message ...

Indeed, the greatest progress has often come from individual initiatives, steeped in passion, courage and obstinacy, sometimes outside of any professional context ...

But these great advances do not reach their full influence until all the actors of society manage to understand them, deem them relevant, and then manufacture them on an industrial scale.

The process can be long, with many acts and twists and turns not always in the honor of Humanity ... :?

Despite the deluge of pessimism and all kinds of abuse, and to paraphrase Modigliani, our only duty is to save our dreams.

So, for SYCOMOREEN's engines and for your future natural flow converters, the adventure continues and everything will come in due time. 8)
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