Mechanical Engineering - Octane Number and Cetane Number

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Octane Number and Cetane Number

What is the octane number of gasoline and cetane number of diesel used in India?

Total Answers and Comments: 2

Last Update: October 26, 2009 Asked by: Gambit

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Submitted by: bhargavmech

Current cetane number of DIESEL-48, BIO DIESEL-51. And cetane index of diesel is 46.

In India Current BIS specification of Anti-Knocking Index of petrol is 84 (unleaded regular) and 88 (unleaded premium).

Above answer was rated as good by the following members:
uv365

September 21, 2009 00:00:39

bhargavmech

Member Since: July 2009 Contribution: 16

RE: Octane Number and Cetane Number

Current cetane number of DIESEL-48 BIO DIESEL-51. And cetane index of diesel is 46.

In India Current BIS specification of Anti-Knocking Index of petrol is 84 (unleaded regular) and 88 (unleaded premium).

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Overall Rating: +1

October 25, 2009 14:36:43

bijuvh

Member Since: October 2009 Contribution: 1

RE: Octane Number and Cetane Number

The higher the octane rating the slower the fuel burns. High-performance engines typically have higher compression ratios (and hence longer piston strokes) which requires higher octane (slow burning) fuel to allow the piston power stroke to complete before the fuel is completely burned.

Cetane number is a measurement of the combustion quality of diesel fuel during compression ignition. It is a significant expression of diesel fuel quality among a number of other measurements that determine overall diesel fuel quality. Cetane number is actually a measure of a fuel's ignition delay; the time period between the start of injection and start of combustion (ignition) of the fuel.

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