What determines if a fuel is better for a combustion engine or

>>7734781
Probably something that can burn quickly

>>7734785
Wtf does that mean? Auto-ignition? Flash-point? Energy density? Which of them is important in the design of an engine?

Petrol ignites via flame or spark. Where as diesel ignites under pressure. Notice how diesel engines don't have spark plugs or leads?

>>7734791
That just depends on engine design

Wow you niggers are such science wannabes but when it comes to solving a simple question, you cant do shit. Gg bitches

>>7734799
You're the dumbass that doesn't know the answer

>>7734792
>>7734794
This doesnt answer the question.

>>7734804
ask better questions then, faggot.

>>7734804

Try being more specific about your damn question then.

>combustion engine or a diesel engine
There are only two possible answers, spark or compression.

Now what the fuck is it you actually want to know, specifically?

>>7734805
The question is simple, and should have a simple answer... The problem is I can't seem to find any literature that says what the atomizer ratio should be depending on xyz fuel variables

Depends on application, specify please.

Diesel is compressed and ignites because of van der waals forces and friction at some X compression, while petrol is ignited on a cycle. If I had a hydrocarbon that no ones tried for an IC engine, how do I know if I should go for a diesel-like or petrol-like engine

>>7734811
It depends on the fuel

>>7734811

Experiment on it.

Can it be ignited?
If so, how small of an ignition source can be used or what is the optimum size?
What is the optimum fuel to air ratio?

If not, can it be ignited via compression? If so, how much compression is required etc etc

>>7734809
The application would determine the superior fuel. Diesel has more energy to it, is self lubricating of combustion components, and offers an engine with less mechanical parts. The downside to diesel is the complexity of fuel delivery and ignition requiring sturdier engines. There is on average 5x the pressure in a diesel system to initiate combustion, also the fuel pressure feeding into the injector to atomizer a heavy oil requires heavy duty, high tech injectors along with a very heavy duty fuel pump. The fuel rail pressures can get up to 15k psi.

>>7734833
>>7734844
Thank you so much for these responses

Usually you want to draw as much power as possible with little loss. When ignition happens in a cylinder younwant fuel to burn down the walls evenly so that there is even heat distribution, otherwise you could have diagonal patterning if shock forces which could lead to failure. The octane you choose and hydrocarbon layout all dictate the ignition timing you can use. Higher