Octane number || Octane number in petrol || Octane number kya hota hai

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The percentage, by volume, of 2,2,4-trimethylpentane in that mixture is the octane number of the fuel. For example, gasoline with the same knocking characteristics as a mixture of 90% iso-octane and 10% heptane would have an octane rating of 90.

Which is better 95 or 98 octane?
98 petrol, which is more stable and resistant to 'knocking', is a better choice when it comes to engine protection. 95 petrol works as well, but if your engine is powerful, it will use higher pressures that 95 petrol may not be able to withstand.

How can I increase my octane number?
For example, 84 octane gasoline is typically blended with 10 percent ethanol to reach the minimum octane requirement of 87 for retail gasoline. Currently, there are two ways of increasing the octane content of gasoline: increasing the volume of gasoline aromatics or increasing the volume of ethanol.

Which has highest octane number?
So, 2,2,4− trimethylpentane has the highest octane number.

Can you put 100 octane gas in any car?
Yes, you can use a higher octane fuel than that recommended for your car. It will not hurt your car in any way, but it will cost you more - for no benefit. You should not use any fuel with a LOWER octane than that recommended for you car though

An octane rating, or octane number, is a standard measure of a fuel's ability to withstand compression in an internal combustion engine without detonating. The higher the octane number, the more compression the fuel can withstand before detonating. Octane rating does not relate directly to the power output or the energy content of the fuel per unit mass or volume, but simply indicates gasoline's capability against compression. In broad terms, fuels with a higher octane rating are used in higher-compression gasoline engines, which may yield higher power. Such higher power comes from the fuel's higher compression by the engine, and not directly from the gasoline.

In contrast, fuels with lower octane (but higher cetane numbers) are ideal for diesel engines, because diesel engines (also called compression-ignition engines) do not compress the fuel, but rather compress only air and then inject fuel into the air that was heated by compression. Gasoline engines rely on ignition of air and fuel compressed together as a mixture, which is ignited near the end of the compression stroke by electric spark plugs. Therefore, high compressibility of the fuel matters mainly for gasoline engines. Using gasoline with lower octane may cause engine knocking.[1]


What is octane and cetane number?
– Gasoline has a octane number 93 – 97. • cetane number denotes the ignition delay time (the start of the injection of diesel fuel to the onset of the auto-ignition). The cetane number ranks the fuels; the higher the cetane number the faster the auto-ignition.


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