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they are the same thing. "knocking" in an engine is the fuel igniting from the heat of compression of the fuel and the air together. in a desel engine this is how it is suposed to work because it has no spark plugs so the only way to ingite the fuel is by compressing the fuel and the air by a ratio of about 22 to 1. in a gas engine the fuel is ignitied by a spark plug, if you use low grade fuel the explosion can happen too early (before the spark plug ignites it) and cause a knocking noise in the engine whitch can cause dammage long tearm the typical compression ratio for a gas engine is 10 to 1. the more compression you have the higher grade fuel you need to prevent "knocking" whitch is why higher end cars need higher grade fuel because they have higher compression engines whitch make more horsepower with omperable size engines.
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What is the different between petrol and diesel?
The difference is that diesel is more oily than petrol, and is cheaper to produce.
How can you separate petrol and diesel from crude oil?
Fractional distillation. Petrol and diesel evaporate at different temperatures.
Why is diesel is not used in petrol engines?
Because diesel is ignited of heat and high high compresion not a spark on lower compresion petrol engine. If you use diesel in a petrol you will end up with your engine knocking and pre-detonation followed by your engine blowing up pretty bad.
Can petrol be used in diesel engine?
the system will do run for some time in knocking state and missfiress and then stops finaly...... sanaan +919997931042
Can petrol engine oil be used for a diesel engine?
No it cannot. Petrol and Diesel are different.
How can diesel be identified from petrol?
diesel vapors due not ignite like gasoline does. Also diesel has a totally different smell.
What is the color of petrol and diesel in petrol station?
petrol light brown, diesel light green
Is petrol is used in diesel cars?
No, diesel engine require diesel fuel. Put petrol in a diesel engine and you will destroy it.
What is diesel and petrol used for?
diesel and petrol are source which is used to generate power.
What are 3 different Green fuels?
Petrol Diesel & Liquefied Petroleum Gas
Why is petrol engine RPM is greater than diesel engine?
for same power diesel engine produces more torque @ less rpm whereas petrol engine produces less torque @more rpm this difference is due to different combustion processes of diesel and petrol
Why do you need to bleed a diesel?
Diesel engines work in a different way to petrol in that they work on pressure to ignite warm diesel as opposed to petrol engines which have spark plugs. in order to work, there can be no air, air wont ignite!!
