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Q: Explain the phenomenon of self ignition in petrol engines?
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What are the defferences between dessel and petrol engine?

Petrol & Gas engines are spark ignited engines where as diesel engines are compression ignited engines. Petrol engines works with explosion of fuel air mixture due to spark from spark plug inside the cylinder. Diesel engines works with combustion of fuel air mixture due to compression, compressed mixture attains a very high temperature which exceeds the flash point of diesel and starts burning inside the cylinder and the hot gases after burning of fuel misture exerts force on piston which makes the diesel engines work. Diesel engines are highly efficient than petrol engines.


Can you use kerosene in petrol engine?

No! Yes! Low performance spark ignition engines in boats and tractors commonly use kerosene as a fuel. Some need to be started on petrol then switched to kerosene.


The petrol engines are also known as?

Gasoline, internal combustion,


Why in petrol engine spark plug is used but not in diesel engine?

Diesel engines run much higher compression than petrol engines. The higher compression makes the air in the cylinder so hot that the fuel self ignites. A petrol engine doesn't get warm enough for self ignition, so you have to add a spark from the spark plug to ignite the fuel.


Why petrol csnnot be used in diese engine?

The diesel engine is designed to use diesel, which reaches combustion at high (relatively to petrol) pressure and temperature. If petrol is injected into a diesel engine, then combustion will take place in a, very different than it was designed, way, which will eventually destroy the engine. But there are engines that have been designed to burn diesel or petrol. They call them bifuel engines. Old farmer tractors used to have this kind of engines.

Related questions

How many types of spark ignition engine?

There are basically two types of spark ignition engine. They are the diesel spark engines and the petrol spark engines.


How are internal combustion engines?

you cut off the ignition spark in a petrol engine


How are internal combustion engines stopped?

you cut off the ignition spark in a petrol engine


Does an mpfi engine replace spark plug?

No. Spark plugs remain in Petrol engines. MPFI stands for Multi Point Fuel Injection, thus replacing the carburetor with injectors. Petrol engines need a source for ignition unlike Diesel engines, where the ignition happens due to compression.


Why does the car continue to run when ignition is shut off?

because of the petrol that ignites with the engines through acceleration.


What are the defferences between dessel and petrol engine?

Petrol & Gas engines are spark ignited engines where as diesel engines are compression ignited engines. Petrol engines works with explosion of fuel air mixture due to spark from spark plug inside the cylinder. Diesel engines works with combustion of fuel air mixture due to compression, compressed mixture attains a very high temperature which exceeds the flash point of diesel and starts burning inside the cylinder and the hot gases after burning of fuel misture exerts force on piston which makes the diesel engines work. Diesel engines are highly efficient than petrol engines.


Why do diesel engines give more mileage than petrol engines?

1) Diesel contains more energy in it than Petrol 2) Diesel engines can run much leaner air fuel ratios than petrol without engine damage, due to compression ignition there are no pre-ignition problems 3) Pumping losses are much lower because the throttle is always wide open 4) Compression ratio is much higher which leads to better thermal efficiency than petrol.


Are governors used on 125 cc 4 stroke petrol engines?

Some Small displacement Motor cycle engines often have a Rev Limiter in the ignition system Most industrial engines have a govener incorporated.


Why petrol engines are more powerful than diesel engines?

There not, or might not be! Factors, SIZE, WEIGHT TO HP, COMPRESSION IGNITION, SAFETY, COMBUSTION TEMP., THERMAL ENERGY RELEASE RATE.


What is spark ignition or Diesel?

spark ignition engine is also known as petrol engine. but in diesel engines the fuel is burnt due to the high compression of air.so there is no need of spark plug


How to open petrol cap Ford Fiesta mark 5?

hi while parking near the petrol bunk the ignition was not switched off vendor pulled the petrol cap but it is locked now how to fill the petrol now please explain


Can you use kerosene in petrol engine?

No! Yes! Low performance spark ignition engines in boats and tractors commonly use kerosene as a fuel. Some need to be started on petrol then switched to kerosene.