Mini diesel engine.

[pirmin kogleck]

i am a bit sad about the fact how the combustion engine is viewed to out younger generation, i want at least build a small engine for myself and maybe for my kids someday to teach them....to show that without those nice beautiful pieces of engineering art we could not life in such a wealthy society.Rudolph Diesel wrote a very interesting book with the title :Solidarity (The Rational Economic Salvation of Mankind). i realy love to walk on the footsteps of such great human beings, and maybe will learn something on my way..

 

[minh-thanh]

I completely agree!
All of us building engines today are using the knowledge gained by others who built engines over the last century and more.
We are all standing on the shoulders of giants.
I am sure that if our predecessors could see what we are doing, they would be happy to know that their work continues to inspire thousands of home engine builders.

That's for sure !
All engines I did, it were just re-prove what others have done or at least they prove that it was possible to do in the past , as Pete Twissell said: "over the last century and more."

 

[minh-thanh]

Hi All !
Just curious... so far, has anyone been in the process of building a diesel engine ?

 

[Bentwings]

Hi All !
Just curious... so far, has anyone been in the process of building a diesel engine ?

haven’t seen much on them lately Davis diesel had model engines but he had his own fuel. Not gas station fuel I think it had plenty of ether in it . They did not have high pressure pumps jus Venturi carbs like glow engines they did have variable compression ratio. It was part of getting these to run well . That’s the limit of my knowledge of them. They were not very ocular .

 

[Nerd1000]

Hi All !
Just curious... so far, has anyone been in the process of building a diesel engine ?

I bought your plans, thinking I would build one. But since then I've gone crazy enough to want to put my own spin on things, so I'm partway through designing a slightly larger (32mm bore x 38mm stroke) diesel with a Bosch style injection pump and indirect injection. Lots of lessons learnt from your work though!

 

[bluejets]

Hi All !
Just curious... so far, has anyone been in the process of building a diesel engine ?

George Punter from Australia built a miniature Lister Diesel engine a couple of years back.
Video here........

 

[minh-thanh]

George Punter from Australia built a miniature Lister Diesel engine a couple of years back.
Video here........

Yes, I knew,
But I want to know if anyone is building the engine since I finished mine

I bought your plans, thinking I would build one. But since then I've gone crazy enough to want to put my own spin on things, so I'm partway through designing a slightly larger (32mm bore x 38mm stroke) diesel with a Bosch style injection pump and indirect injection. Lots of lessons learnt from your work though!

Making the engine a little bigger doesn't matter, as long as it runs
Are you building or designing ? are there any pictures ?

 

[Nerd1000]

Yes, I knew,
But I want to know if anyone is building the engine since I finished mine


Making the engine a little bigger doesn't matter, as long as it runs
Are you building or designing ? are there any pictures ?

Still designing. Mostly working on the cylinder head right now.

 

[minh-thanh]

Looks great !
If possible, keep it updated

 

[ajoeiam]

Still designing. Mostly working on the cylinder head right now.

Hmmmm - - - is that freecad?

Might be good if you started a new thread for your build - - - (please?).

 

[Nerd1000]

Hmmmm - - - is that freecad?

Might be good if you started a new thread for your build - - - (please?).

It is and I will, once I'm happy with the general design (I don't have a block yet!)

 

[pirmin kogleck]

hy guys , i have no progress so far but i was able to get in touch with a nice guy on facebook wich is willed to help me and we decided to maybe share some informations...for now ijust moved in a new appartment and have to set up all my new tools and stuf, it will take me some time until i will finish my engine, i see it as a long term project, i have no need to rush ! i also make a compression ignition Model engine with 0.63cc wich only needs cylinder lapping and piston and contra piston fitted and the ports milled on rotary table...i will soon respond on this topic.

 

[ruben]

Hi ALL !
I just tried it ... I don't know if it is an injector
View attachment 120715View attachment 120716

hola me podrias mandar los planos del inyector por favor

gracias

 

[minh-thanh]

hola me podrias mandar los planos del inyector por favor

gracias

Please email me: [email protected]
I will consider.....because I have designed several injector styles for this diesel engine and also for 4 cylinder diesel engines, each design has its advantages and disadvantages... Please use English when you send email .
Right now I have a lot of work to do and have to go to the hospital because of my mother's health problems so I'm not online often.

 

[minh-thanh]

hola me podrias mandar los planos del inyector por favor

gracias

I received your email but I'm too busy, I just got home - now is 10:30 pm - and sent an email with the information you need
I saw some of your comments about diesel engines
So I have a few commemt
Diesel engine with injectors and fuel pump: Is it possible to make an engine yourself???
Yes it is possible, but it requires a lot of patience and meticulousness , Experience....
If you haven't made an engine yet, start making one IC engine
If you have made a engine IC
Then... reduce the cylinder diameter gradually. It will give you experience in making small cylinders and from there you can move on to cylinders with diameters of 5 , 4, 3, 2 mm.
And then comes the ball valve: It is just as challenging as making a cylinder
Only if you can make the engine run with cylinder + ringless pistons will you know the best fit and that is the premise for your goals
I have a bit of experience with cylinders so getting it running - even though it was my first diesel - wasn't too difficult for me.

 

[The Ignoble Troll]

Enjoying your Diesel Engine build.

If you are talking about the piston in the cylinder, you are going to need metal piston rings as I don't really think O rings can stand up to the high compression pressures. For very long.
In regards to the Plunger and Barrel in conventional injection pumps, they do not use any type of seals. They seal using the diesel fuel in a very small clearance between these two parts. The Plunger is lapped to the Barrel to get this small clearance they require to make the seal. The fuel also lubricates these parts.

Cheers
Willy

I know those post was way back but I thought I would add, diesel is a hydraulic fluid which means it has 5 functions

Sealing
Cooling
Flushing
Lubricating
And force transmission.

In a diesel you add ignition.

But in a pump/injector you see the fluid doing all 5 things before it burns.

 

[TonyM]

. Wonder what fuel this is using. Cant see the injector.

 

[The Ignoble Troll]

Forgive me but all this talk about HP pumps,


Everyone says "plunger pump". Is the discussion actually about plunger pumps or is everyone building piston pumps?

 

[minh-thanh]

I don't know...but I like to call it a fuel pump

 

[Roger B]

Some semantics here. To me a plunger pump is one with the seal is where the piston enters the cylinder. This is probably not suitable for fuel injection due to the likely hood of air being trapped around the piston. A piston pump is where the seal is at or close to the end of the piston which is generally how fuel injection pumps are made.