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Volumetric efficiency of IC engine Formula

GoVolumetric efficiency of IC engine given actual volume of engine cylinder Formula

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Volumetric Efficiency of IC Engine is defined as the ratio of mass density of air-fuel mixture drawn into the cylinder to the mass density of the same volume of air in the intake manifold. Check FAQs

η v = \frac{m af \cdot n R}{ρ a \cdot V te \cdot N}

η_v - Volumetric Efficiency of IC Engine?m_af - Air Mass Flow Rate?n_R - Crankshaft Revolutions per Power Stroke?ρ_a - Air Density at Intake?V_te - Theoretical Volume of Engine?N - Engine Speed?

Volumetric efficiency of IC engine Example

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Here is how the Volumetric efficiency of IC engine equation looks like with Values.

Here is how the Volumetric efficiency of IC engine equation looks like with Units.

Here is how the Volumetric efficiency of IC engine equation looks like.

0.1962 = \frac{0.9 \cdot 2}{57.63 \cdot 0.0038 \cdot 400}

0.1962 = \frac{0.9kg/s \cdot 2}{57.63kg/m³ \cdot 0.0038m³ \cdot 400rev/min}

0.1962 = \frac{0.9 \cdot 2}{57.63 \cdot 0.0038 \cdot 400}

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Volumetric efficiency of IC engine Solution

Follow our step by step solution on how to calculate Volumetric efficiency of IC engine?

FIRST Step Consider the formula

η v = \frac{m af \cdot n R}{ρ a \cdot V te \cdot N}

Next Step Substitute values of Variables

∴

η v = \frac{0.9kg/s \cdot 2}{57.63kg/m³ \cdot 0.0038m³ \cdot 400rev/min}

Next Step Convert Units

∴

η v = \frac{0.9kg/s \cdot 2}{57.63kg/m³ \cdot 0.0038m³ \cdot 41.8879rad/s}

Next Step Prepare to Evaluate

∴

η v = \frac{0.9 \cdot 2}{57.63 \cdot 0.0038 \cdot 41.8879}

Next Step Evaluate

∴

η v = 0.196223798994493

LAST Step Rounding Answer

∴

η v = 0.1962

Volumetric efficiency of IC engine Formula Elements

Variables

Volumetric Efficiency of IC Engine

Volumetric Efficiency of IC Engine is defined as the ratio of mass density of air-fuel mixture drawn into the cylinder to the mass density of the same volume of air in the intake manifold.

Symbol: η_v

Measurement: NAUnit: Unitless

Note: Value should be greater than 0.

Formulas to find Volumetric Efficiency of IC Engine

Air Mass Flow Rate

Air Mass Flow Rate is the mass of intake air that is flowing per unit time.

Symbol: m_af

Measurement: Mass Flow RateUnit: kg/s

Note: Value should be greater than 0.

Formulas to find Air Mass Flow Rate

Crankshaft Revolutions per Power Stroke

Crankshaft Revolutions per Power Stroke is defined as the number of crankshaft rotations when the IC engine takes one complete cycle.

Symbol: n_R

Measurement: NAUnit: Unitless

Note: Value should be greater than 0.

Formulas to find Crankshaft Revolutions per Power Stroke

Air Density at Intake

Air Density at Intake is defined as the density of air recorded at intake manifold at atmospheric pressure and room temperature.

Symbol: ρ_a

Measurement: DensityUnit: kg/m³

Note: Value should be greater than 0.

Formulas to find Air Density at Intake

Theoretical Volume of Engine

Theoretical Volume of Engine is defined as the total volume of the combustion chamber including swept volume and clearance volume.

Symbol: V_te

Measurement: VolumeUnit: m³

Note: Value should be greater than 0.

Formulas to find Theoretical Volume of Engine

Engine Speed

Engine Speed is the speed at which the crankshaft of the engine rotates.

Symbol: N

Measurement: Angular VelocityUnit: rev/min

Note: Value should be greater than 0.

Formulas to find Engine Speed

Other Formulas to find Volumetric Efficiency of IC Engine

Go Volumetric efficiency of IC engine given actual volume of engine cylinder

η v = \frac{V a}{V te}

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Go Horsepower of engine

HP = \frac{T \cdot E rpm}{5252}

Go Bmep given engine torque

P mb = \frac{2 \cdot π \cdot T \cdot N}{s p}

How to Evaluate Volumetric efficiency of IC engine?

Volumetric efficiency of IC engine evaluator uses Volumetric Efficiency of IC Engine = (Air Mass Flow Rate*Crankshaft Revolutions per Power Stroke)/(Air Density at Intake*Theoretical Volume of Engine*Engine Speed) to evaluate the Volumetric Efficiency of IC Engine, The Volumetric efficiency of IC engine formula is defined as the ratio of the mass density of the air-fuel mixture drawn into the cylinder at atmospheric pressure (during the intake stroke) to the mass density of the same volume of air in the intake manifold. Volumetric Efficiency of IC Engine is denoted by η_v symbol.

How to evaluate Volumetric efficiency of IC engine using this online evaluator? To use this online evaluator for Volumetric efficiency of IC engine, enter Air Mass Flow Rate (m_af), Crankshaft Revolutions per Power Stroke (n_R), Air Density at Intake (ρ_a), Theoretical Volume of Engine (V_te) & Engine Speed (N) and hit the calculate button.

FAQs on Volumetric efficiency of IC engine

What is the formula to find Volumetric efficiency of IC engine?

The formula of Volumetric efficiency of IC engine is expressed as Volumetric Efficiency of IC Engine = (Air Mass Flow Rate*Crankshaft Revolutions per Power Stroke)/(Air Density at Intake*Theoretical Volume of Engine*Engine Speed). Here is an example- 1.962238 = (0.9*2)/(57.63*0.0038*41.8879020457308).

How to calculate Volumetric efficiency of IC engine?

With Air Mass Flow Rate (m_af), Crankshaft Revolutions per Power Stroke (n_R), Air Density at Intake (ρ_a), Theoretical Volume of Engine (V_te) & Engine Speed (N) we can find Volumetric efficiency of IC engine using the formula - Volumetric Efficiency of IC Engine = (Air Mass Flow Rate*Crankshaft Revolutions per Power Stroke)/(Air Density at Intake*Theoretical Volume of Engine*Engine Speed).

What are the other ways to Calculate Volumetric Efficiency of IC Engine?

Here are the different ways to Calculate Volumetric Efficiency of IC Engine-

Volumetric Efficiency of IC Engine=Actual Volume of Intake Air/Theoretical Volume of Engine

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Volumetric efficiency of IC engine Formula

​GoVolumetric efficiency of IC engine given actual volume of engine cylinder Formula

Volumetric efficiency of IC engine Example

Volumetric efficiency of IC engine Solution

Volumetric efficiency of IC engine Formula Elements

Other Formulas to find Volumetric Efficiency of IC Engine

Other formulas in For 4 Stroke Engine category

How to Evaluate Volumetric efficiency of IC engine?

FAQs on Volumetric efficiency of IC engine

Variable Name

GoVolumetric efficiency of IC engine given actual volume of engine cylinder Formula