Indicated mean effective pressure given mechanical efficiency Calculator

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✖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%
✖Mechanical efficiency of ic engine is defined as the the ratio of brake power (delivered power) to the indicated power (power provided to the piston).ⓘ Mechanical efficiency of ic engine [η_m]			+10% -10%

✖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.ⓘ Indicated mean effective pressure given mechanical efficiency

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Formula

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Indicated mean effective pressure given mechanical efficiency

Formula

`"imep" = "Bmep"/"η"_{"m"}`

Example

`"6250Pa"="5000Pa"/"0.8"`

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Indicated mean effective pressure given mechanical efficiency Solution

STEP 0: Pre-Calculation Summary

Formula Used

Imep = Bmep/Mechanical efficiency of ic engine
imep = Bmep/η_m
This formula uses 3 Variables

Variables Used

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.
Mechanical efficiency of ic engine - Mechanical efficiency of ic engine is defined as the the ratio of brake power (delivered power) to the indicated power (power provided to the piston).

STEP 1: Convert Input(s) to Base Unit

Bmep: 5000 Pascal --> 5000 Pascal No Conversion Required
Mechanical efficiency of ic engine: 0.8 --> No Conversion Required

STEP 2: Evaluate Formula

Substituting Input Values in Formula

imep = Bmep/η_m --> 5000/0.8

Evaluating ... ...

imep = 6250

STEP 3: Convert Result to Output's Unit

6250 Pascal --> No Conversion Required

FINAL ANSWER

6250 Pascal <-- Imep

(Calculation completed in 00.004 seconds)

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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

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< 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

Indicated mean effective pressure given mechanical efficiency Formula

Imep = Bmep/Mechanical efficiency of ic engine
imep = Bmep/η_m

What is indicated mean effective pressure?

The mean effective pressure (MEP) is a quantity relating to the operation of a reciprocating engine and is a measure of an engine's capacity to do work that is independent of engine displacement.When quoted as an indicated mean effective pressure (IMEP), it may be thought of as the average pressure acting on a piston during the different portions of its cycle.

How to Calculate Indicated mean effective pressure given mechanical efficiency?

Indicated mean effective pressure given mechanical efficiency calculator uses Imep = Bmep/Mechanical efficiency of ic engine to calculate the Imep, The Indicated mean effective pressure given mechanical efficiency formula is defined as the average pressure acting on a piston during the different portions of its cycle. Imep is denoted by imep symbol.

How to calculate Indicated mean effective pressure given mechanical efficiency using this online calculator? To use this online calculator for Indicated mean effective pressure given mechanical efficiency, enter Bmep (Bmep) & Mechanical efficiency of ic engine (η_m) and hit the calculate button. Here is how the Indicated mean effective pressure given mechanical efficiency calculation can be explained with given input values -> 6250 = 5000/0.8.

FAQ

What is Indicated mean effective pressure given mechanical efficiency?

The Indicated mean effective pressure given mechanical efficiency formula is defined as the average pressure acting on a piston during the different portions of its cycle and is represented as imep = Bmep/η_m or Imep = Bmep/Mechanical efficiency of ic engine. 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 & Mechanical efficiency of ic engine is defined as the the ratio of brake power (delivered power) to the indicated power (power provided to the piston).

How to calculate Indicated mean effective pressure given mechanical efficiency?

The Indicated mean effective pressure given mechanical efficiency formula is defined as the average pressure acting on a piston during the different portions of its cycle is calculated using Imep = Bmep/Mechanical efficiency of ic engine. To calculate Indicated mean effective pressure given mechanical efficiency, you need Bmep (Bmep) & Mechanical efficiency of ic engine (η_m). With our tool, you need to enter the respective value for Bmep & Mechanical efficiency of ic engine 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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