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Indicated Mean Effective Pressure Formula

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Indicated Mean Effective Pressure is the average pressure obtained in the combustion chamber during the entire working cycle. Check FAQs

I mep = IP \cdot \frac{60}{n \cdot l s \cdot A e}

I_mep - Indicated Mean Effective Pressure?IP - Indicated Power of Engine?n - Number of Working Strokes per Minute?l_s - Stroke Length of Piston?A_e - Cross Sectional Area of Engine Cylinder?

Indicated Mean Effective Pressure Example

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Here is how the Indicated Mean Effective Pressure equation looks like with Values.

Here is how the Indicated Mean Effective Pressure equation looks like with Units.

Here is how the Indicated Mean Effective Pressure equation looks like.

0.3173 = 4950 \cdot \frac{60}{500 \cdot 190 \cdot 9852}

0.3173MPa = 4950W \cdot \frac{60}{500 \cdot 190mm \cdot 9852mm²}

0.3173 = 4950 \cdot \frac{60}{500 \cdot 190 \cdot 9852}

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Indicated Mean Effective Pressure Solution

Follow our step by step solution on how to calculate Indicated Mean Effective Pressure?

FIRST Step Consider the formula

I mep = IP \cdot \frac{60}{n \cdot l s \cdot A e}

Next Step Substitute values of Variables

∴

I mep = 4950W \cdot \frac{60}{500 \cdot 190mm \cdot 9852mm²}

Next Step Convert Units

∴

I mep = 4950W \cdot \frac{60}{500 \cdot 0.19m \cdot 0.0099m²}

Next Step Prepare to Evaluate

∴

I mep = 4950 \cdot \frac{60}{500 \cdot 0.19 \cdot 0.0099}

Next Step Evaluate

∴

I mep = 317328.033848324Pa

Next Step Convert to Output's Unit

∴

I mep = 0.317328033848324MPa

LAST Step Rounding Answer

∴

I mep = 0.3173MPa

Indicated Mean Effective Pressure Formula Elements

Variables

Indicated Mean Effective Pressure

Indicated Mean Effective Pressure is the average pressure obtained in the combustion chamber during the entire working cycle.

Symbol: I_mep

Measurement: PressureUnit: MPa

Note: Value should be greater than 0.

Formulas to find Indicated Mean Effective Pressure

Indicated Power of Engine

Indicated Power of Engine is the total power produced due to combustion of fuel within the IC engine's cylinder in one complete cycle neglecting any losses.

Symbol: IP

Measurement: PowerUnit: W

Note: Value should be greater than 0.

Formulas to find Indicated Power of Engine

Number of Working Strokes per Minute

Number of Working Strokes per Minute is the number of power strokes per minute for an engine.

Symbol: n

Measurement: NAUnit: Unitless

Note: Value should be greater than 0.

Formulas to find Number of Working Strokes per Minute

Stroke Length of Piston

Stroke Length of Piston is the distance traveled by piston in cylinder from BDC to TDC or vice versa.

Symbol: l_s

Measurement: LengthUnit: mm

Note: Value should be greater than 0.

Formulas to find Stroke Length of Piston

Cross Sectional Area of Engine Cylinder

Cross Sectional Area of Engine Cylinder is the area of the cross-section of an engine cylinder.

Symbol: A_e

Measurement: AreaUnit: mm²

Note: Value should be greater than 0.

Formulas to find Cross Sectional Area of Engine Cylinder

Other formulas in Bore and Length of Engine Cylinder category

Go Bore of Engine Cylinder given Length

D i = \frac{L}{1.725}

Go Gas Force Acting on Cylinder Cover

F g = \frac{π \cdot {D i}^{2}}{4} \cdot p max

Go Length of Engine Cylinder given Cylinder Bore

L = 1.725 \cdot D i

Go Maximum Gas Pressure Inside Engine Cylinder

p max = 10 \cdot I mep

How to Evaluate Indicated Mean Effective Pressure?

Indicated Mean Effective Pressure evaluator uses Indicated Mean Effective Pressure = Indicated Power of Engine*60/(Number of Working Strokes per Minute*Stroke Length of Piston*Cross Sectional Area of Engine Cylinder) to evaluate the Indicated Mean Effective Pressure, The Indicated Mean Effective Pressure can be thought of as the pressure acting on the piston over full stroke which would give the same work output. Generally speaking, the higher this is the better. Indicated Mean Effective Pressure is denoted by I_mep symbol.

How to evaluate Indicated Mean Effective Pressure using this online evaluator? To use this online evaluator for Indicated Mean Effective Pressure, enter Indicated Power of Engine (IP), Number of Working Strokes per Minute (n), Stroke Length of Piston (l_s) & Cross Sectional Area of Engine Cylinder (A_e) and hit the calculate button.

FAQs on Indicated Mean Effective Pressure

What is the formula to find Indicated Mean Effective Pressure?

The formula of Indicated Mean Effective Pressure is expressed as Indicated Mean Effective Pressure = Indicated Power of Engine*60/(Number of Working Strokes per Minute*Stroke Length of Piston*Cross Sectional Area of Engine Cylinder). Here is an example- 3.2E-7 = 4950*60/(500*0.19*0.009852).

How to calculate Indicated Mean Effective Pressure?

With Indicated Power of Engine (IP), Number of Working Strokes per Minute (n), Stroke Length of Piston (l_s) & Cross Sectional Area of Engine Cylinder (A_e) we can find Indicated Mean Effective Pressure using the formula - Indicated Mean Effective Pressure = Indicated Power of Engine*60/(Number of Working Strokes per Minute*Stroke Length of Piston*Cross Sectional Area of Engine Cylinder).

Can the Indicated Mean Effective Pressure be negative?

No, the Indicated Mean Effective Pressure, measured in Pressure cannot be negative.

Which unit is used to measure Indicated Mean Effective Pressure?

Indicated Mean Effective Pressure is usually measured using the Megapascal[MPa] for Pressure. Pascal[MPa], Kilopascal[MPa], Bar[MPa] are the few other units in which Indicated Mean Effective Pressure can be measured.

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Indicated Mean Effective Pressure Formula

Indicated Mean Effective Pressure Example

Indicated Mean Effective Pressure Solution

Indicated Mean Effective Pressure Formula Elements

Other formulas in Bore and Length of Engine Cylinder category

How to Evaluate Indicated Mean Effective Pressure?

FAQs on Indicated Mean Effective Pressure

Variable Name