The air fuel ratio of the petrol engine is controlled by Carburetor
The ratio is about 15:1 fuel to air.
Ideally it is 14.7 air to 1 fuel in an internal combustion engine.
It is when the "correct" air to fuel ratio is used to completely burn the fuel in question in an internal combustion engine. If exactly the correct amount of air is used this is called the stoichiometric mix.
A 14.7 to 1 air/fuel ratio.
Ensures that all the fuel mixes with the air creating a proper air to fuel ratio to produce combustion.
Regulates the amount of fuel to the engine to maintain the fuel/air ratio at the proper mixture
to supply the engine a mix of air and fuel at 14.7 to 1 ratio.
make the fuel sufficient burning
14.7:1
There is no required a/f ratio on a diesel. It can be as low as 100:1 at no load idle.
Air to fuel ratio is the ratio between the weight of air to the weight of fuel, for example: 14.7 pounds of air to 1 pound of fuel would be a air:fuel ratio of 14.7:1 This particular example is called the stoichiometric ratio for gasoline...it's ideal ratio in order to efficiently use all the fuel. This ratio varies for different fuels....for example, ethanol fuels have a stoichiometric air:fuel ratio of 13.85:1. In actuality, a gasoline car gets it's best fuel mileage when the fuel is reduced slightly and produces it's best power when the ratio is a little heavier on the fuel side.