Define air-fuel ratio.

Understand the Problem

The question is asking for a definition of the term 'air-fuel ratio', which is an important concept in combustion and engine performance. The air-fuel ratio is the quantity of air in relation to the amount of fuel in a combustion process, typically measured in weight or volume.

Answer

The air-fuel ratio is the mass ratio of air to fuel in combustion.

The air-fuel ratio (AFR) is the mass ratio of air to a solid, liquid, or gaseous fuel present in a combustion process.

Answer for screen readers

The air-fuel ratio (AFR) is the mass ratio of air to a solid, liquid, or gaseous fuel present in a combustion process.

More Information

The stoichiometric air-fuel ratio for gasoline engines is typically 14.7:1, meaning 14.7 parts air to 1 part fuel. This ratio ensures complete combustion with no unburned fuel.

Tips

Make sure to not confuse the air-fuel ratio with the volume ratio, as it specifically refers to the mass ratio.

Sources

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