Diesel engine without injection pump

[Woodcutter]

If you want...
You differentiate explosion et Diesel, for me these are the terms compression ignition et controlled ignition.
Indeed, we can also separate the way the fuel burns, either by rapid propagation of a flame front from a single ignition point, or by mass detonation of a mixture injected quickly ...

Finally, overall, it seems to me that the term "internal combustion engine" covers all of the engines where one uses the combustion of a fuel-oxidant mixture in a closed place, combustion from which one recovers mechanically the driving force linked to the expansion and therefore to the pressure of the hot gases, right?

In addition, I have more or less understood what Mr. David wants to do since he explains that he powers his Pantone gas engine and uses very low flow diesel injection just to ignite everything. , not as "engine" fuel.

Regarding terms and technique, I remain on my position: Christophe has noticed (often?) That people from the outside openly mock "tinkerers"which prevail on Éconolgie and I maintain that it is not by using the bad terms and preposterous explanations that the credibility is recognized.
Whether you don't care is a fact, but if other people have ideas to pass on or defend, they may be more sensitive to them.


A branquignole is someone who tells cracks, bullshit, nonsense, and therefore who has no credibility ...

[Other]

Hello Woodcutter

I think that when it comes to combustion, there is a whole nuance
from a flame to a detonation
just takes the nuance in the explosives of the RDX black powder
it's always a question of total burning speed
The shorter the time, the more explosive the explosion.
It is the same in an internal combustion engine in search by all means to reduce the combustion time without however reaching the detonation which carcterise good engines they have less lead in ignition than the others.
For the injection of auto diesesel (which is not a real diesel but rather a mixed engine between explosion and diesel engine)

The diesel is injected into an excess of compressed air, the first drops boil well, the others enter into a flame and into a gas produced by combustion and are satisfied with the oxygen diluted in this partially burnt gas,
The compression has the role of raising the air temperature and reducing the combustion chamber, increasing the phy ratio.
At equal compression a diesel engine would have a lower efficiency than that of an internal combustion engine.
When the load decreases, the duration of the injection decreases and one approaches a combustion at constant volume, the yield increases.
For me, the injection of diesel fuel in a diesel engine or the injection of jet A kerosene in a turbine, or the spraying of fuel oil in a burner is not an explosion it is a spread combustion.
If I'm on forum it is not to pass or defend my ideas, it is especially to learn, to understand.
(a day where I learn nothing is a day of lost)

I will not pass judgment on the importance you place on credibility or what others think of you, or your social status which is important in your life, but it is part of your lifestyle.
I just note that once you withdraw from the city world you become different, my way of seeing things is very close to that of ZAC, and I attribute this to isolation.

That said, I don't want the discussion to degenerate between cultural differences, I'm going to stay on technical questions.


Andre

[Christophe]

Regarding terms and technique, I remain on my position: Christophe has noticed (often?) That people from the outside openly mock "tinkerers"which prevail on Éconolgie and I maintain that it is not by using the bad terms and preposterous explanations that the credibility is recognized.

+1

[Woodcutter]

[...] I will not pass judgment on the importance that you give about credibility or what others think of you, or your social rank which is important in your life, but it is part of your life habits. [...]

What does history do?

Have I ever mentioned what others think of me or any story of social rank?

I give you an example (absurd and taken to the extreme) of what I think is of no use to converse and exchange in an interesting and intelligent way on a forum :
I invented a machine that captures the energy of the Rahelian cosmos to generate an ionic fusion between my kharma and the energy of quantum minerals from Gaia, our Mother Earth, and that's how I produce spiritual fuel which I use to move my vehicle ...

Did you learn something? No...
What am I saying is true? You don't know ...
You understood ? I doubt...

Me too I like to learn, otherwise I would not be spending as much time on these forums !

But if some want to learn and others to present their ideas, they all have to speak the same language, don't you think?

It is the same problem with the "d'jeunz" who gibberish SMS throughout the post sometimes ...

[Philippe Schutt]

in the combustion of diesel, there are too rich zones and too poor zones. this is almost inevitable with direct injection.

having a gasified oxidizer in the intake air in small quantities will therefore improve the general combustion at the time of injection, thanks to a more uniform mixture.
For self-ignition, does it require a certain amount of oxidizer, or is a tiny dose already fatal? for example, will a self-igniting engine with a 14/1 air-fuel mixture do the same with a 30/1 mixture?

[Other]

Hello Philippe

I already asked myself the same question to know from which ratio it is self-igniting,
When I was younger we started diesels (deutz) on a mechanical shovel with a can of start pilot and in very cold weather we used a torch, we also sent acetylene in the intake and it takes a certain amount to maintain the rotation of the motor,
I think the ratio is wider than that of a petrol engine
from 1 / 8 to 1 / 28

Last summer on the water doping panton on the Mercedes, as I walk with a small carburetor I tested a mixture of alcohol and water in a proportion of 40% alcohol and the engine does not ignite, although I do have not had the audacity to raise the ratio too much, if it is true that what comes out of the pants does not ignite. it in everything else when the reactor cools down, which comes out at the other end of the reactor it's just a vaporization of fuel, the risk of an engine runaway becomes great ...


Andre

[Vroom143]

Hello everybody

I'm sorry to put that back on the carpet, but the discussion on specific vocabulary points made me laugh a lot:

so here, just for information, no engine is currently diesel !!!! If you want, play on words, do it all the way: Diesel, in no way corresponds to a type of combustion case (explosion or "slow"), and even less to a type of fuel as pointed out André. "Diesel" is a theoretical thermodynamic cycle, of a very particular form in the Watt diagram; this cycle is purely theoretical since it considers compression and decompression as purely adiabatic, and that no advance is present in the cycle ...
Clearly, no engine works exactly on the model of the diesel cycle, but some approach it more or less and by extension are called diesels ...
Voila voila, so if you want to play bickering over details like that, go ahead, I find it very funny, but when I no longer see anyone talking about tape: we say adhesive tape!


(Aye no! Don't hit me ....)

[Vroom143]

Ooops, I forgot my serious question!

Well, I still don't understand everything about pantone, but one question tickles me ... if we increase the amount of alcohol, we should increase the octane level of what comes out of the pantone, right? With a higher octane rate, it should limit the problems of self-ignition or knocking ... on the other hand it should not be true with all engines: if the geometry of the combustion chamber offers a sharp stop in one place , there is necessarily a hot spot, and there, it is the alcohol that self ignites ...

In short, overall, for those who have tried, increasing the amount of alcohol does not limit auto ignition?

[Other]

Hello
in the case mentioned above I took a 5 TD 300 TD diesel engine which I dope with water and in preparation for the fall (it freezes at my place) I did water mixture tests alcohol, and I push up to 40%, no auto-ignition, but when I redo the tests with more precaution I would try 100% engine alcohol always in charge in case, stop at traffic lights as it can spoil, the compression ratio is 21,5 / 1


On an experimental 125 cc petrol engine whose compression ratio I don't know (probably , with a 100% panton reactor it works with many fuels Fuel oil, alcohol, diesel, varsol, acetone, thinner, paint and even engine oil it works without auto-igniting (as long as the reactor is hot)
It remains to be seen whether with a rate of 1/21 it will be the same!
that's why I go carefully, I saw what it makes a packaged diesel ..

Andre

[Philippe Schutt]

In general, the octane number increases when:
- the length of the carbon chains decreases
- the number of secondary chains increases (for the same number of atoms of C)
- the number of cyclic structures (cycloalkanes and aromatics) increases

so if the reactor is cracking as many people think, it's normal for it to ignite less.