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
- Air-fuel ratio - en.wikipedia.org
- Air-fuel ratio - ScienceDirect - sciencedirect.com
- Mysteries of the Air/Fuel Ratio (AFR) Explained - haynes.com
