Brake Power given Mean Effective Pressure Calculator

✖Brake Mean Effective Pressure is a calculation of the engine cylinder pressure that would give the measured brake horsepower.ⓘ Brake Mean Effective Pressure [P_mb]			+10% -10%
✖Stroke Length is the distance travelled by the piston during each cycle.ⓘ Stroke Length [L]			+10% -10%
✖Area of Cross Section is the enclosed surface area, product of length and breadth.ⓘ Area of Cross Section [A]			+10% -10%
✖Engine Speed is the speed at which the crankshaft of the engine rotates.ⓘ Engine Speed [N]			+10% -10%

✖Brake Power is the power available at the crankshaft.ⓘ Brake Power given Mean Effective Pressure [BP]

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Formula

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Brake Power given Mean Effective Pressure

Formula

BP = (P mb \cdot L \cdot A \cdot (N))

Example

0.55292 kW = (5000 Pa \cdot 8.8 cm \cdot 30 cm² \cdot (4000 rev/min))

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Brake Power given Mean Effective Pressure Solution

STEP 0: Pre-Calculation Summary

Formula Used

Brake Power = (Brake Mean Effective Pressure*Stroke Length*Area of Cross Section*(Engine Speed))
BP = (P_mb*L*A*(N))
This formula uses 5 Variables

Variables Used

Brake Power - (Measured in Watt) - Brake Power is the power available at the crankshaft.
Brake Mean Effective Pressure - (Measured in Pascal) - Brake Mean Effective Pressure is a calculation of the engine cylinder pressure that would give the measured brake horsepower.
Stroke Length - (Measured in Meter) - Stroke Length is the distance travelled by the piston during each cycle.
Area of Cross Section - (Measured in Square Meter) - Area of Cross Section is the enclosed surface area, product of length and breadth.
Engine Speed - (Measured in Radian per Second) - Engine Speed is the speed at which the crankshaft of the engine rotates.

STEP 1: Convert Input(s) to Base Unit

Brake Mean Effective Pressure: 5000 Pascal --> 5000 Pascal No Conversion Required
Stroke Length: 8.8 Centimeter --> 0.088 Meter (Check conversion here)
Area of Cross Section: 30 Square Centimeter --> 0.003 Square Meter (Check conversion here)
Engine Speed: 4000 Revolution per Minute --> 418.879020457308 Radian per Second (Check conversion here)

STEP 2: Evaluate Formula

Substituting Input Values in Formula

BP = (P_mb*L*A*(N)) --> (5000*0.088*0.003*(418.879020457308))

Evaluating ... ...

BP = 552.920307003647

STEP 3: Convert Result to Output's Unit

552.920307003647 Watt -->0.552920307003647 Kilowatt (Check conversion here)

FINAL ANSWER

0.552920307003647 ≈ 0.55292 Kilowatt <-- Brake Power

(Calculation completed in 00.004 seconds)

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Home » Physics » IC Engine » Engine Performance Parameters » Engine Dynamics » Mechanical » Important Formulas of Engine Dynamics » Brake Power given Mean Effective Pressure

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Created by Aditya Prakash Gautam

Indian Institute of Technology (IIT (ISM) ), Dhanbad, Jharkhand

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< Important Formulas of Engine Dynamics Calculators

Brake Power given Mean Effective Pressure

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

Beale Number

Go Beale Number = Engine Power/(Average Gas Pressure*Piston Swept Volume*Engine Frequency)

Brake specific fuel consumption

Go Brake Specific Fuel Consumption = Fuel Consumption in IC engine/Brake Power

Brake Power given Mechanical Efficiency

Go Brake Power = (Mechanical Efficiency/100)*Indicated Power

< Power and Efficiency Calculators

Brake Power given Mean Effective Pressure

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

Indicated Power given Mechanical Efficiency

Go Indicated Power = Brake Power/(Mechanical Efficiency/100)

Brake Power given Mechanical Efficiency

Go Brake Power = (Mechanical Efficiency/100)*Indicated Power

Mechanical Efficiency of IC engine

Go Mechanical Efficiency = (Brake Power/Indicated Power)*100

Brake Power given Mean Effective Pressure Formula

Brake Power = (Brake Mean Effective Pressure*Stroke Length*Area of Cross Section*(Engine Speed))
BP = (P_mb*L*A*(N))

What is mean effective pressure of an engine ?

Mean effective pressure is the constant pressure acting on the piston during the working stroke to do the same work as done by actual varying pressure produced during cycle.
It is the ratio of work done to the piston displacement.
Pm = work done / stroke volume .

How to Calculate Brake Power given Mean Effective Pressure?

Brake Power given Mean Effective Pressure calculator uses Brake Power = (Brake Mean Effective Pressure*Stroke Length*Area of Cross Section*(Engine Speed)) to calculate the Brake Power, The Brake Power given Mean Effective Pressure formula is defined as a calculation of the engine cylinder pressure that would give the measured brake horsepower. Brake Power is denoted by BP symbol.

How to calculate Brake Power given Mean Effective Pressure using this online calculator? To use this online calculator for Brake Power given Mean Effective Pressure, enter Brake Mean Effective Pressure (P_mb), Stroke Length (L), Area of Cross Section (A) & Engine Speed (N) and hit the calculate button. Here is how the Brake Power given Mean Effective Pressure calculation can be explained with given input values -> 0.000553 = (5000*0.088*0.003*(418.879020457308)).

FAQ

What is Brake Power given Mean Effective Pressure?

The Brake Power given Mean Effective Pressure formula is defined as a calculation of the engine cylinder pressure that would give the measured brake horsepower and is represented as BP = (P_mb*L*A*(N)) or Brake Power = (Brake Mean Effective Pressure*Stroke Length*Area of Cross Section*(Engine Speed)). Brake Mean Effective Pressure is a calculation of the engine cylinder pressure that would give the measured brake horsepower, Stroke Length is the distance travelled by the piston during each cycle, Area of Cross Section is the enclosed surface area, product of length and breadth & Engine Speed is the speed at which the crankshaft of the engine rotates.

How to calculate Brake Power given Mean Effective Pressure?

The Brake Power given Mean Effective Pressure formula is defined as a calculation of the engine cylinder pressure that would give the measured brake horsepower is calculated using Brake Power = (Brake Mean Effective Pressure*Stroke Length*Area of Cross Section*(Engine Speed)). To calculate Brake Power given Mean Effective Pressure, you need Brake Mean Effective Pressure (P_mb), Stroke Length (L), Area of Cross Section (A) & Engine Speed (N). With our tool, you need to enter the respective value for Brake Mean Effective Pressure, Stroke Length, Area of Cross Section & Engine Speed and hit the calculate button. You can also select the units (if any) for Input(s) and the Output as well.

How many ways are there to calculate Brake Power?

In this formula, Brake Power uses Brake Mean Effective Pressure, Stroke Length, Area of Cross Section & Engine Speed. We can use 2 other way(s) to calculate the same, which is/are as follows -

Brake Power = (Mechanical Efficiency/100)*Indicated Power
Brake Power = (Mechanical Efficiency/100)*Indicated Power

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