Actual Air Fuel Ratio Calculator

✖Mass of Air refers to the total quantity of air inducted into the engine cylinders during the intake stroke in a specified time frame.ⓘ Mass of Air [m_a]			+10% -10%
✖Mass of Fuel refers to the total quantity of combustible material (Fuel) entering the engine cylinder in a specified time frame.ⓘ Mass of Fuel [m_f]			+10% -10%

✖Actual air fuel ratio is the actual mass of air mixed with actual mass of fuel that is present during combustion inside IC engine. It is a crucial parameter for good fuel economy in IC engines.ⓘ Actual Air Fuel Ratio [R_a]

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Formula

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Actual Air Fuel Ratio

Formula

`"R"_{"a"} = "m"_{"a"}/"m"_{"f"}`

Example

`"15.9936"="23.9904kg"/"1.5kg"`

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Actual Air Fuel Ratio Solution

STEP 0: Pre-Calculation Summary

Formula Used

Actual Air Fuel Ratio = Mass of Air/Mass of Fuel
R_a = m_a/m_f
This formula uses 3 Variables

Variables Used

Actual Air Fuel Ratio - Actual air fuel ratio is the actual mass of air mixed with actual mass of fuel that is present during combustion inside IC engine. It is a crucial parameter for good fuel economy in IC engines.
Mass of Air - (Measured in Kilogram) - Mass of Air refers to the total quantity of air inducted into the engine cylinders during the intake stroke in a specified time frame.
Mass of Fuel - (Measured in Kilogram) - Mass of Fuel refers to the total quantity of combustible material (Fuel) entering the engine cylinder in a specified time frame.

STEP 1: Convert Input(s) to Base Unit

Mass of Air: 23.9904 Kilogram --> 23.9904 Kilogram No Conversion Required
Mass of Fuel: 1.5 Kilogram --> 1.5 Kilogram No Conversion Required

STEP 2: Evaluate Formula

Substituting Input Values in Formula

R_a = m_a/m_f --> 23.9904/1.5

Evaluating ... ...

R_a = 15.9936

STEP 3: Convert Result to Output's Unit

15.9936 --> No Conversion Required

FINAL ANSWER

15.9936 <-- Actual Air Fuel Ratio

(Calculation completed in 00.004 seconds)

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Credits

Created by Syed Adnan

Ramaiah University of Applied Sciences (RUAS), bangalore

Syed Adnan has created this Calculator and 200+ more calculators!

Verified by Kartikay Pandit

National Institute Of Technology (NIT), Hamirpur

Kartikay Pandit has verified this Calculator and 400+ more calculators!

< 18 Air-Standard Cycles Calculators

Mean Effective Pressure in Dual Cycle

Go Mean Effective Pressure of Dual Cycle = Pressure at Start of Isentropic Compression*(Compression Ratio^Heat Capacity Ratio*((Pressure Ratio in Dual Cycle-1)+Heat Capacity Ratio*Pressure Ratio in Dual Cycle*(Cut-off Ratio-1))-Compression Ratio*(Pressure Ratio in Dual Cycle*Cut-off Ratio^Heat Capacity Ratio-1))/((Heat Capacity Ratio-1)*(Compression Ratio-1))

Thermal Efficiency of Stirling Cycle given Heat Exchanger Effectiveness

Go Thermal Efficiency of Stirling Cycle = 100*(([R]*ln(Compression Ratio)*(Final Temperature-Initial Temperature))/([R]*Final Temperature*ln(Compression Ratio)+Molar Specific Heat Capacity at Constant Volume*(1-Effectiveness of Heat Exchanger)*(Final Temperature-Initial Temperature)))

Work Output for Dual Cycle

Go Work Output of Dual Cycle = Pressure at Start of Isentropic Compression*Volume at Start of Isentropic Compression*(Compression Ratio^(Heat Capacity Ratio-1)*(Heat Capacity Ratio*Pressure Ratio*(Cut-off Ratio-1)+(Pressure Ratio-1))-(Pressure Ratio*Cut-off Ratio^(Heat Capacity Ratio)-1))/(Heat Capacity Ratio-1)

Work Output for Diesel Cycle

Go Work Output of Diesel Cycle = Pressure at Start of Isentropic Compression*Volume at Start of Isentropic Compression*(Compression Ratio^(Heat Capacity Ratio-1)*(Heat Capacity Ratio*(Cut-off Ratio-1)-Compression Ratio^(1-Heat Capacity Ratio)*(Cut-off Ratio^(Heat Capacity Ratio)-1)))/(Heat Capacity Ratio-1)

Mean Effective Pressure in Diesel Cycle

Go Mean Effective Pressure of Diesel Cycle = Pressure at Start of Isentropic Compression*(Heat Capacity Ratio*Compression Ratio^Heat Capacity Ratio*(Cut-off Ratio-1)-Compression Ratio*(Cut-off Ratio^Heat Capacity Ratio-1))/((Heat Capacity Ratio-1)*(Compression Ratio-1))

Thermal Efficiency of Dual Cycle

Go Thermal Efficiency of Dual Cycle = 100*(1-1/(Compression Ratio^(Heat Capacity Ratio-1))*((Pressure Ratio in Dual Cycle*Cut-off Ratio^Heat Capacity Ratio-1)/(Pressure Ratio in Dual Cycle-1+Pressure Ratio in Dual Cycle*Heat Capacity Ratio*(Cut-off Ratio-1))))

Mean Effective Pressure in Otto Cycle

Go Mean Effective Pressure of Otto Cycle = Pressure at Start of Isentropic Compression*Compression Ratio*(((Compression Ratio^(Heat Capacity Ratio-1)-1)*(Pressure Ratio-1))/((Compression Ratio-1)*(Heat Capacity Ratio-1)))

Thermal Efficiency of Atkinson Cycle

Go Thermal Efficiency of Atkinson Cycle = 100*(1-Heat Capacity Ratio*((Expansion Ratio-Compression Ratio)/(Expansion Ratio^(Heat Capacity Ratio)-Compression Ratio^(Heat Capacity Ratio))))

Work Output for Otto Cycle

Go Work Output of Otto Cycle = Pressure at Start of Isentropic Compression*Volume at Start of Isentropic Compression*((Pressure Ratio-1)*(Compression Ratio^(Heat Capacity Ratio-1)-1))/(Heat Capacity Ratio-1)

Air Standard Efficiency for Diesel Engines

Go Efficiency of Diesel Cycle = 100*(1-1/(Compression Ratio^(Heat Capacity Ratio-1))*(Cut-off Ratio^(Heat Capacity Ratio)-1)/(Heat Capacity Ratio*(Cut-off Ratio-1)))

Thermal Efficiency of Diesel Cycle

Go Thermal Efficiency of Diesel Cycle = 1-1/Compression Ratio^(Heat Capacity Ratio-1)*(Cut-off Ratio^Heat Capacity Ratio-1)/(Heat Capacity Ratio*(Cut-off Ratio-1))

Thermal Efficiency of Lenoir Cycle

Go Thermal Efficiency of Lenoir Cycle = 100*(1-Heat Capacity Ratio*((Pressure Ratio^(1/Heat Capacity Ratio)-1)/(Pressure Ratio-1)))

Thermal Efficiency of Ericsson Cycle

Go Thermal Efficiency of Ericsson Cycle = (Higher Temperature-Lower Temperature)/(Higher Temperature)

Air Standard Efficiency for Petrol engines

Go Efficiency of Otto Cycle = 100*(1-1/(Compression Ratio^(Heat Capacity Ratio-1)))

Thermal Efficiency of Otto Cycle

Go Thermal Efficiency of Otto Cycle = 1-1/Compression Ratio^(Heat Capacity Ratio-1)

Relative Air-Fuel Ratio

Go Relative Air Fuel Ratio = Actual Air Fuel Ratio/Stoichiometric Air Fuel Ratio

Air Standard Efficiency given Relative Efficiency

Go Efficiency = Indicated Thermal Efficiency/Relative Efficiency

Actual Air Fuel Ratio

Go Actual Air Fuel Ratio = Mass of Air/Mass of Fuel

Actual Air Fuel Ratio Formula

Actual Air Fuel Ratio = Mass of Air/Mass of Fuel
R_a = m_a/m_f

What Rich and Lean mixture signifies in Internal Combustion Engine?

1. Rich Mixture (AFR < 14.7:1): This signifies that there is more fuel than the ideal stoichiometric ratio of 14.7 parts air to 1 part fuel. It can lead to incomplete combustion, which increases emissions and decreases fuel efficiency. However, it can also potentially provide more power output, especially in high-performance engines, due to the excess fuel available for combustion.
2. Lean Mixture (AFR > 14.7:1): This indicates that there is more air than the ideal stoichiometric ratio of 14.7 parts air to 1 part fuel. A lean mixture typically results in better fuel efficiency and lower emissions due to more complete combustion. However, it may potentially lead to less power output because there is less fuel available for combustion.

How to Calculate Actual Air Fuel Ratio?

Actual Air Fuel Ratio calculator uses Actual Air Fuel Ratio = Mass of Air/Mass of Fuel to calculate the Actual Air Fuel Ratio, Actual Air Fuel Ratio refers to the actual mass ratio of air to fuel present in the mixture that gets burned within the cylinders. This ratio is critical for engine performance, emissions, and fuel efficiency. Modern engine control systems constantly adjust the AFR to optimize performance based on factors like engine load and speed. Actual Air Fuel Ratio is denoted by R_a symbol.

How to calculate Actual Air Fuel Ratio using this online calculator? To use this online calculator for Actual Air Fuel Ratio, enter Mass of Air (m_a) & Mass of Fuel (m_f) and hit the calculate button. Here is how the Actual Air Fuel Ratio calculation can be explained with given input values -> 15.9936 = 23.9904/1.5.

FAQ

What is Actual Air Fuel Ratio?

Actual Air Fuel Ratio refers to the actual mass ratio of air to fuel present in the mixture that gets burned within the cylinders. This ratio is critical for engine performance, emissions, and fuel efficiency. Modern engine control systems constantly adjust the AFR to optimize performance based on factors like engine load and speed and is represented as R_a = m_a/m_f or Actual Air Fuel Ratio = Mass of Air/Mass of Fuel. Mass of Air refers to the total quantity of air inducted into the engine cylinders during the intake stroke in a specified time frame & Mass of Fuel refers to the total quantity of combustible material (Fuel) entering the engine cylinder in a specified time frame.

How to calculate Actual Air Fuel Ratio?

Actual Air Fuel Ratio refers to the actual mass ratio of air to fuel present in the mixture that gets burned within the cylinders. This ratio is critical for engine performance, emissions, and fuel efficiency. Modern engine control systems constantly adjust the AFR to optimize performance based on factors like engine load and speed is calculated using Actual Air Fuel Ratio = Mass of Air/Mass of Fuel. To calculate Actual Air Fuel Ratio, you need Mass of Air (m_a) & Mass of Fuel (m_f). With our tool, you need to enter the respective value for Mass of Air & Mass of Fuel and hit the calculate button. You can also select the units (if any) for Input(s) and the Output as well.

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