Indicated Mean Effective Pressure Calculator

✖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.ⓘ Indicated Power of Engine [IP]			+10% -10%
✖Number of Working Strokes per Minute is the number of power strokes per minute for an engine.ⓘ Number of Working Strokes per Minute [n]			+10% -10%
✖Stroke Length of Piston is the distance traveled by piston in cylinder from BDC to TDC or vice versa.ⓘ Stroke Length of Piston [l_s]			+10% -10%
✖Cross Sectional Area of Engine Cylinder is the area of the cross-section of an engine cylinder.ⓘ Cross Sectional Area of Engine Cylinder [A_e]			+10% -10%

✖Indicated Mean Effective Pressure is the average pressure obtained in the combustion chamber during the entire working cycle.ⓘ Indicated Mean Effective Pressure [I_mep]

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Indicated Mean Effective Pressure Solution

STEP 0: Pre-Calculation Summary

Formula Used

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)
I_mep = IP*60/(n*l_s*A_e)
This formula uses 5 Variables

Variables Used

Indicated Mean Effective Pressure - (Measured in Pascal) - Indicated Mean Effective Pressure is the average pressure obtained in the combustion chamber during the entire working cycle.
Indicated Power of Engine - (Measured in Watt) - 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.
Number of Working Strokes per Minute - Number of Working Strokes per Minute is the number of power strokes per minute for an engine.
Stroke Length of Piston - (Measured in Meter) - Stroke Length of Piston is the distance traveled by piston in cylinder from BDC to TDC or vice versa.
Cross Sectional Area of Engine Cylinder - (Measured in Square Meter) - Cross Sectional Area of Engine Cylinder is the area of the cross-section of an engine cylinder.

STEP 1: Convert Input(s) to Base Unit

Indicated Power of Engine: 4950 Watt --> 4950 Watt No Conversion Required
Number of Working Strokes per Minute: 500 --> No Conversion Required
Stroke Length of Piston: 190 Millimeter --> 0.19 Meter (Check conversion here)
Cross Sectional Area of Engine Cylinder: 9852 Square Millimeter --> 0.009852 Square Meter (Check conversion here)

STEP 2: Evaluate Formula

Substituting Input Values in Formula

I_mep = IP*60/(n*l_s*A_e) --> 4950*60/(500*0.19*0.009852)

Evaluating ... ...

I_mep = 317328.033848324

STEP 3: Convert Result to Output's Unit

317328.033848324 Pascal -->0.317328033848324 Megapascal (Check conversion here)

FINAL ANSWER

0.317328033848324 ≈ 0.317328 Megapascal <-- Indicated Mean Effective Pressure

(Calculation completed in 00.007 seconds)

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Created by Saurabh Patil

Shri Govindram Seksaria Institute of Technology and Science (SGSITS ), Indore

Saurabh Patil has created this Calculator and 700+ more calculators!

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National Institute Of Technology (NIT), Hamirpur

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< Bore and Length of Engine Cylinder Calculators

Length of Engine Cylinder given Cylinder Bore

LaTeX Go Length of Engine Cylinder = 1.725*Inner Diameter of Engine Cylinder

Bore of Engine Cylinder given Length

LaTeX Go Inner Diameter of Engine Cylinder = Length of Engine Cylinder/1.725

Stroke Length of Engine given Length of Cylinder

LaTeX Go Stroke Length of Piston = Length of Engine Cylinder/1.15

Length of Engine Cylinder given Stroke Length

LaTeX Go Length of Engine Cylinder = 1.15*Stroke Length of Piston

< Important Formulas of Engine Cylinder Calculators

Indicated Mean Effective Pressure

LaTeX Go 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)

Gas Force Acting on Cylinder Cover

LaTeX Go Gas Force on Cylinder Cover = (pi*Inner Diameter of Engine Cylinder^2)/4*Maximum Gas Pressure Inside Cylinder

Length of Engine Cylinder given Cylinder Bore

LaTeX Go Length of Engine Cylinder = 1.725*Inner Diameter of Engine Cylinder

Bore of Engine Cylinder given Length

LaTeX Go Inner Diameter of Engine Cylinder = Length of Engine Cylinder/1.725

Indicated Mean Effective Pressure Formula

LaTeX Go

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)
I_mep = IP*60/(n*l_s*A_e)

Mean Effective Pressure

Indicated mean effective pressure (IMEP) is the mean effective pressure calculated with indicated power (work). This parameter does not take into account the efficiency of the engine.
Brake mean effective pressure (BMEP) is the mean effective pressure calculated from the dynamometer power (torque). This is the actual output of the internal combustion engine, at the crankshaft. Brake mean effective pressure takes into account the engine efficiency.
Friction mean effective pressure (FMEP) is an indicator of the mean effective pressure of the engine lost through friction and it’s the difference between indicated mean effective pressure and brake mean effective pressure.
FMEP = IMEP – BMEP

How to Calculate Indicated Mean Effective Pressure?

Indicated Mean Effective Pressure calculator 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 calculate 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 calculate Indicated Mean Effective Pressure using this online calculator? To use this online calculator 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. Here is how the Indicated Mean Effective Pressure calculation can be explained with given input values -> 3.2E-7 = 4950*60/(500*0.19*0.009852).

FAQ

What is 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 and is represented as I_mep = IP*60/(n*l_s*A_e) or 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). 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, Number of Working Strokes per Minute is the number of power strokes per minute for an engine, Stroke Length of Piston is the distance traveled by piston in cylinder from BDC to TDC or vice versa & Cross Sectional Area of Engine Cylinder is the area of the cross-section of an engine cylinder.

How to calculate 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 is calculated using 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 calculate Indicated Mean Effective Pressure, you need 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). With our tool, you need to enter the respective value for Indicated Power of Engine, Number of Working Strokes per Minute, Stroke Length of Piston & Cross Sectional Area of Engine Cylinder 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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