Jet Fuel VS Diesel VS Gasoline how they burn and what color are they.

[Lumituisku]

 

[Lumituisku]

 

[Don_prince]

Gasoline engines nowadays use direct injection aswell. This gives full controll over the mixture at any given point. The ignition of diesel gives more power giving it more torc where for a gasoline engine needs more rpm. This is why at low rpm diesel engines are louder. Its the sound of power.

A bit of gasoline in a diesel engine is no problem. We actualy do this sometime in the merc. Cleans out the fuel system a bit. Diesel in a gasoline car you risk hydrolocking the engine as the diesel will not ignite.

Most older diesels work with prechambers. They have chambers in which the fuel and air gets preheated and mixed. Then it is moved into the piston chamber.

Why direct injecting in modern engines? Well current technics allow for multi point injection. Staging up the mixture bit by bit, just to create the perfect mixture and ignition timing. The multipoint injection allowes this to change for any required power at any given engine speed. With this you have more power for your amount of fuel and less weigth for your engine. It also allowes some tinkering with emmisions.

In order to deal with this they thought up a common rail system. One high pressure fuel pump feading one line of pressured fuel to all injectors. These open 14 to a 250 times per ignition cycle with an electric solanoid.

THis is why I take a common rail diesel over a 454.

[wilso845]

You. Should "NEVER" put petrol in to a Diesel system.
The way diesel works not only fuels but lubricates and cleans the system.
By introducing petrol, is like putting white spirit to a fresh coat of paint it stips the crap, but It then leaves the system with particals  to now start passing through you fuel and filter system.

Jet fuel, kero and diesel all have similar properties due to how they a fracked at the refinery, while in the army we used Avtur ( jet fuel) which is kero with icing inhibitors added, out in Bosnia and Norway.
And whilst in Germany before Christmas leave we would put 20L of kero in the tanks to prevent waxing, thus In turn preventing moisture entering the fuel system.

[wilso845]

https://www.quora.com/Which-is-worse-for-the-engine-putting-diesel-in-a-petrol-car-or-petrol-in-a-diesel-car

" Its definitely a lot worse for the diesel engine.

First of all, you can't fill a petrol car with diesel by mistake. Diesel nozzles are bigger than the filler neck on petrol cars. Also, there is a plate under the neck to prevent any intrusion but the small petrol nozzle, which was designed to prevent drivers from putting leaded(big nozzle too) petrol in the first place. If you happen to do that somehow, you wont damage the  engine even if you try to start it.

Diesel is heavier than the gasoline, and much more "oily". It needs pressure to be ignited and does not evaporate as gasoline do. What happens after putting diesel on a tank is, diesel sank and injectors feed the engine a load of diesel. When you try to ignite the engine, spark plugs won't be able to fire the diesel and the engine won't start.

To fix the issue, draining the tank and filling it again with gasoline ,cleaning the injectors and finally cranking the engine to throw up the unwanted diesel would suffice. Some may want to change the fuel filter to be on the safe side but it is not a must.

The other way around, putting petrol on a diesel engine, is much more complicated. A diesel car can be filled with petrol rather easily, as the filler neck allows all nozzle kinds smaller than the diesel nozzle inside (which is basically every nozzle available).

Modern diesel engines operate at very high pressures and within very fine tolerances. Also the fuel act as a lubricant for the engine and the injection system. When petrol meets the diesel engine, it acts as a thinner, causing the fuel to lose its lubrication properties and cause the engine and fuel pump to wear down through friction. If it comes this far, whole fuel system needs to be flushed and if there are any damaged components, they need to be changed. (Probably a few)

If things go a little far, by trying to start the engine (may start) and try to drive; additional damage may happen by pre detonation. As petrol is much more volatile than the diesel, and diesel needs high pressure to be combusted, with so much pressure and air, petrol prematurely combusted and forcing pistons to rise and go back down out of their order. This kind of force may prove disastrous for many internal components in the engine block.

If you happen to fill your car the wrong fuel by any chance, Do not turn on the ignition key - many modern cars circulate the fuel into the fuel system as soon as the battery turned on."

[Don_prince]

Hold on, we are not talking mass quantitys here. little bit. Do you know these diesel fuel additives? Yes? 80% gasoline. There ya go. It is used to get the gunk out of the fuel systems.

Now what if:
What if we are talking mass quantitys? Well, in a common rail system appart from the high pressure pump not much can go wrong. Unless they used the wrong type of tubing that is offcource.

Mechanical pump? Well depends on the pump...

Regardless dont drive on the wrong fuel...