11:3
The correct air-fuel ratio for overrun typically falls between 15:1 to 20:1, which means there is more air than fuel in the mixture. This leaner mixture helps improve fuel efficiency and reduces emissions during deceleration when the throttle is closed. However, the exact ratio can vary based on the engine design and tuning. It's important to ensure that the engine runs smoothly without misfiring or stalling during this phase.
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.
13:1
approximately 14.7:1
54:21
The ratio is about 15:1 fuel to air.
Sound like your fuel/air ratio is not correct.
The air fuel ratio of the petrol engine is controlled by Carburetor
The fuel-air ratio (F/A ratio) is calculated by dividing the mass of fuel by the mass of air in a combustion process. It can be expressed as F/A = (mass of fuel) / (mass of air). To determine this ratio, you can use the specific fuel's energy content and the stoichiometric coefficients for the combustion reaction. This ratio is crucial for optimizing combustion efficiency and reducing emissions in engines and burners.
The correct air fuel ratio for a cold start is typically richer than normal operating conditions, around 10:1 to 12:1, to ensure the engine starts easily and runs smoothly until it reaches operating temperature. This extra fuel helps compensate for poor atomization and vaporization of fuel when the engine is cold.
Air/Fuel Ratio
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.