octane number

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octane number

n.
A numerical representation of the antiknock properties of motor fuel, compared with a standard reference fuel, such as isooctane, which has an octane number of 100. Also called octane rating.

octane number

or

octane rating

n
(Chemistry) a measure of the quality of a petrol expressed as the percentage of isooctane in a mixture of isooctane and n-heptane that gives a fuel with the same antiknock qualities as the given petrol

oc′tane num`ber


n.
a designation of antiknock quality of gasoline, numerically equal to the percentage of isooctane by volume in a mixture of isooctane and normal heptane that matches the given gasoline in antiknock characteristics. Also called oc′tane rat`ing.
[1930–35]
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.octane number - a measure of the antiknock properties of gasoline
quantity, measure, amount - how much there is or how many there are of something that you can quantify
Translations

octane number

, octane rating
nOktanzahl f
References in periodicals archive ?
For E100, the difference in results from the standard RON and modified RON tests was about 5 octane numbers, while this difference was about 1 octane number for E30.
It has been shown that light alcohols are very good fuels for spark ignition (SI)-engines due to their high octane numbers [4] [5] [6] [7] [8] [9] [10] [11] [12].
[7.] Sayin, C, "The Impact of Varying Spark Timing at Different Octane Numbers on the Performance and Emission Characteristics of a Gasoline Engine," Fuel 97:856-861, 2012.
et al., "Study of Antiknock Performance Under Various Octane Numbers and Compression Ratios in a DISI Engine," SAE Technical Paper 2003-01-1804.
Contract award: delivery, installation, foundation and connection to existing installations: water, electricity and sewerage waukesha engine for determining the octane numbers lob and lom (ron and mon) gasoline (resistance to combustion knock) according to the requirements of pn-en iso 5163 and bs en iso 5164.
Traphic Jam from the Maldives also managed to get the crowd head- banging as they performed high- octane numbers in their native language.
Firstly, there will be a loss of about two 'octane numbers' from the older four-star leaded and the LRP that replaced it and ignition timing might have to be reset to avoid a tendency to detonation.
Engine designers also learned how to configure combustion chambers for lower octane requirements, that is, how to design mechanical octane numbers into them.
[25.] Naser, N, Yang, S.Y, Kalghatgi, G., and Chung, S.H., "Relating the Octane Numbers of Fuels to Ignition Delay Times Measured in an Ignition Quality Tester (IQT)," Fuel 187:117-127, 2017.
A conventional RON 95 E5 according EN 228 /28/ with octane numbers determined on a CFR engine in accordance to EN ISO 5163/64 /29/, /30/ serves as reference fuel for all investigations.
Contract notice: Supply, installation, foundation and connection to existing installations: water, electricity and sewage systems, waukesha engine for determining octane numbers lob and lom (ron and mon) gasoline (resistance to combustion knock) according to the requirements of pn-en iso 5163 and bs en iso 5164.
Sensitivity increase of 10 octane numbers (F1 to F3 or MON shift from 87 to 77) resulted in an efficiency increase of 1.9-3.9%, depending on the compression ratio (calculated as ([[eta].sub.F3]-[[eta].sub.F1])/ [[eta].sub.F1]*100), whereas, a sensitivity increase of 5 octane numbers (F2 to F3 or MON shift from 82 to 77) had an efficiency increase of 2.8-3.7%.