Frictional mean effective pressure Calculator

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✖Imep is defined as the indicated mean effective pressure which is the average pressure acting on a piston during the different portions of its cycle.ⓘ Imep			+10% -10%
✖Bmep is defined as the average pressure which, if imposed on the pistons uniformly from the top to the bottom of each power stroke, would produce the measured power output.ⓘ Bmep			+10% -10%

✖Fmep stands for frictional mean effective pressure and may be thought as the mean effective pressure lost due to friction.ⓘ Frictional mean effective pressure

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Formula

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Frictional mean effective pressure

Formula

`"fmep" = "imep"-"Bmep"`

Example

`"1010Pa"="6010Pa"-"5000Pa"`

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Frictional mean effective pressure Solution

STEP 0: Pre-Calculation Summary

Formula Used

Fmep = Imep-Bmep
fmep = imep-Bmep
This formula uses 3 Variables

Variables Used

Fmep - (Measured in Pascal) - Fmep stands for frictional mean effective pressure and may be thought as the mean effective pressure lost due to friction.
Imep - (Measured in Pascal) - Imep is defined as the indicated mean effective pressure which is the average pressure acting on a piston during the different portions of its cycle.
Bmep - (Measured in Pascal) - Bmep is defined as the average pressure which, if imposed on the pistons uniformly from the top to the bottom of each power stroke, would produce the measured power output.

STEP 1: Convert Input(s) to Base Unit

Imep: 6010 Pascal --> 6010 Pascal No Conversion Required
Bmep: 5000 Pascal --> 5000 Pascal No Conversion Required

STEP 2: Evaluate Formula

Substituting Input Values in Formula

fmep = imep-Bmep --> 6010-5000

Evaluating ... ...

fmep = 1010

STEP 3: Convert Result to Output's Unit

1010 Pascal --> No Conversion Required

FINAL ANSWER

1010 Pascal <-- Fmep

(Calculation completed in 00.013 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 Anshika Arya

National Institute Of Technology (NIT), Hamirpur

Anshika Arya has verified this Calculator and 2500+ more calculators!

< 24 For 4 Stroke Engine Calculators

Volumetric efficiency of IC engine

Go Volumetric efficiency of IC engine = (Air Mass Flow Rate*Crankshaft revolutions per power stroke)/(Air density at intake*Theoretical volume of engine*Engine speed in rps)

Rate of heat conduction of engine wall

Go Rate of Heat Conduction of Engine Wall = ((-Thermal conductivity of material)*Surface Area of Engine Wall*Temperature Difference across Engine Wall)/Thickness of Engine Wall

Brake power measured with dynamo meter

Go Brake power measured with dynamo meter = (pi*Pulley diameter*(Engine speed in rps*60)*(Dead weight-Spring scale reading))/60

Indicated Power of Four-stroke Engine

Go Indicated Power = (Number of Cylinders*Mean Effective Pressure*Stroke Length*Area of Cross Section*(Engine Speed))/(2)

Volumetric Efficiency for 4S engines

Go Volumetric Efficiency = ((2*Air Mass Flow Rate)/(Air density at intake*Piston Swept Volume*(Engine Speed)))*100

Brake Mean Effective Pressure of 4S Engines given Brake power

Go Brake Mean Effective Pressure = (2*Brake Power)/(Stroke Length*Area of Cross Section*(Engine Speed))

Work done per cycle in ic engine

Go Work done per cycle in ic engine = (Indicated engine power*Crankshaft revolutions per power stroke)/Engine Speed in rpm

Fuel conversion efficiency

Go Fuel conversion efficiency = Work done per cycle in ic engine/(Mass of fuel added per cycle*Heating value of the fuel)

Combustion efficiency

Go Combustion efficiency = Heat added by combustion per cycle/(Mass of fuel added per cycle*Heating value of the fuel)

Intake air mass of engine cylinder

Go Mass of air at intake = (Air Mass Flow Rate*Crankshaft revolutions per power stroke)/Engine Speed in rpm

Bmep given engine torque

Go Bmep = (2*pi*Engine Torque*Engine Speed)/Mean Piston Speed

Displaced volume in engine cylinder

Go Displaced volume = (Piston stroke*pi*(Engine cylinder bore in meter^2))/4

Intake air density

Go Air density at intake = Intake air pressure/([R]*Intake air temperature)

Thermal efficiency of IC engine

Go Thermal efficiency of ic engine = Work done per cycle in ic engine/Heat added by combustion per cycle

Volumetric efficiency of IC engine given actual volume of engine cylinder

Go Volumetric efficiency of IC engine = Actual volume of intake air/Theoretical volume of engine

Connecting rod length to crank radius ratio

Go Connecting rod length to crank radius ratio = Connecting rod length/Crank Radius of Engine

Ratio of cylinder bore to piston stroke

Go Connecting rod length to crank radius ratio = Connecting rod length/Crank Radius of Engine

Total cylinder volume of IC engine

Go Total volume of an engine = Total number of cylinders*Total volume of engine cylinder

Fuel conversion efficiency given thermal conversion efficiency

Go Fuel conversion efficiency = Combustion efficiency*Thermal conversion efficiency

Frictional power of engine

Go Frictional power of engine = Indicated Power of Engine-Brake power of engine

Actual intake air volume per cylinder

Go Actual volume of intake air = Mass of air at intake/Air density at intake

Horsepower of engine

Go Horsepower of engine = (Engine Torque*Engine RPM)/5252

Indicated mean effective pressure given mechanical efficiency

Go Imep = Bmep/Mechanical efficiency of ic engine

Frictional mean effective pressure

Go Fmep = Imep-Bmep

Frictional mean effective pressure Formula

Fmep = Imep-Bmep
fmep = imep-Bmep

Explain frictional mean effective pressure.

Theoretical mean effective pressure required to overcome engine friction, can be thought of as mean effective pressure lost due to friction. Friction mean effective pressure calculation requires accurate measurement of cylinder pressure and dynamometer brake torque.

How to Calculate Frictional mean effective pressure?

Frictional mean effective pressure calculator uses Fmep = Imep-Bmep to calculate the Fmep, The Frictional mean effective pressure formula is defined as the effective pressure in the engine cylinder that is lost due to friction between reciprocating parts of the engine. Fmep is denoted by fmep symbol.

How to calculate Frictional mean effective pressure using this online calculator? To use this online calculator for Frictional mean effective pressure, enter Imep (imep) & Bmep (Bmep) and hit the calculate button. Here is how the Frictional mean effective pressure calculation can be explained with given input values -> 1010 = 6010-5000.

FAQ

What is Frictional mean effective pressure?

The Frictional mean effective pressure formula is defined as the effective pressure in the engine cylinder that is lost due to friction between reciprocating parts of the engine and is represented as fmep = imep-Bmep or Fmep = Imep-Bmep. Imep is defined as the indicated mean effective pressure which is the average pressure acting on a piston during the different portions of its cycle & Bmep is defined as the average pressure which, if imposed on the pistons uniformly from the top to the bottom of each power stroke, would produce the measured power output.

How to calculate Frictional mean effective pressure?

The Frictional mean effective pressure formula is defined as the effective pressure in the engine cylinder that is lost due to friction between reciprocating parts of the engine is calculated using Fmep = Imep-Bmep. To calculate Frictional mean effective pressure, you need Imep (imep) & Bmep (Bmep). With our tool, you need to enter the respective value for Imep & Bmep 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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