Definition - What does Ignition Quality mean?
Ignition Quality is a property of fuel that is determined with the help of molecular composition of fuel by determining the ignition delay time. Fuels which have high ignition quality are characterized as fuels with short ignition delay, whereas fuels that have poor or less ignition quality have long ignition delay. It is generally the ability of fuels to get ignited when they come into contact with compressed air in diesel cylinders. It can be measured with the help of an index known as the cetane number.
Petropedia explains Ignition Quality
Ignition Quality is linked to ignition delay time, which is the time between a start of injection and combustion. The ignition delay time is affected strongly by conditions like pressure and temperature of the environment into which the fuel is being injected. Hence, the tests which are developed to determine the ignition quality of the fuels are required to be carried out under the test conditions controlled carefully to make sure that only the effects of fuel are measured. There are three types of methods that can be used to determine the ignition quality – Cetane Number, Ignition Delay and Cetane Index.
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