If by mistake you fill wrong fuel in your vehicle like petrol in diesel engine vehicle or diesel in petrol engine vehicle it will effect the engine very badly.
1. Diesel in petrol vehicle-
Petrol engine works on evaporation of fuel(petrol) in carburetor and forming an air-fuel mixture. What happens if we put diesel in carburetor?
As we know that flash point of diesel is 50 °C and that of petrol is −40°C and carburetor is at room temperature i.e. 30 °C so petrol can easily evaporate in carburetor to mix with air but it’s not the case in diesel.
So what happens when we put diesel in a petrol engine?
Diesel will not be able to form vapor in carburetor. This will not allow a mixture of diesel vapor with air to form. So there will be no air-fuel mixture. There will be only air going in cylinder with no fuel so there will be no combustion at all.
But what if you are running the engine for a long distance? Let's assume that the car has been running for 100 km . So now the whole engine is very hot. Now if you put diesel in such a hot engine system, then temperature of the whole system would be greater than 50 °C. This allows diesel to evaporate, so there will be air-fuel mixture. But the performance would not be as desirable because the engine was designed for petrol and not for Diesel. That's why you can see some people saying that diesel can work in petrol engine.
2. Petrol in diesel vehicle-
Diesel engine is a compression ignition engine. The engine is designed in such a way that after compression stroke the compression is high enough to generate a temperature greater than the auto-ignition point of fuel. Here the actual fuel is diesel and the ignition point of diesel is 245 °C so after compression the temperature will be somewhere around 260 °C (when engine is cool, not when it's running).
So what would happen if we put petrol instead of diesel? The temperature would not be high enough to cause auto ignition of petrol (whose ignition point is 285 °C). So the engine will not start.
#WrongFuel #Petrol #Diesel
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9 сен 2024
