✖Indicated power 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 [IP]			+10% -10%
✖Brake Power is the power available at the crankshaft.ⓘ Brake Power [BP]			+10% -10%

✖Frictional power of engine is defined as the power loss in overcoming the friction between piston and cylinder walls.ⓘ Frictional power of engine [FP]

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Formula

✖

Frictional power of engine

Formula

`"FP" = "IP"-"BP"`

Example

`"138.07W"="140W"-"1.93W"`

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Frictional power of engine Solution

STEP 0: Pre-Calculation Summary

Formula Used

Frictional Power of Engine = Indicated Power-Brake Power
FP = IP-BP
This formula uses 3 Variables

Variables Used

Frictional Power of Engine - (Measured in Watt) - Frictional power of engine is defined as the power loss in overcoming the friction between piston and cylinder walls.
Indicated Power - (Measured in Watt) - Indicated power is the total power produced due to combustion of fuel within the IC engine's cylinder in one complete cycle neglecting any losses.
Brake Power - (Measured in Watt) - Brake Power is the power available at the crankshaft.

STEP 1: Convert Input(s) to Base Unit

Indicated Power: 140 Watt --> 140 Watt No Conversion Required
Brake Power: 1.93 Watt --> 1.93 Watt No Conversion Required

STEP 2: Evaluate Formula

Substituting Input Values in Formula

FP = IP-BP --> 140-1.93

Evaluating ... ...

FP = 138.07

STEP 3: Convert Result to Output's Unit

138.07 Watt --> No Conversion Required

FINAL ANSWER

138.07 Watt <-- Frictional Power of Engine

(Calculation completed in 00.004 seconds)

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Home » Physics » IC Engine » Engine Performance Parameters » Mechanical » For 4 Stroke Engine » Frictional power of engine

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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)

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

Indicated Power of Four-stroke Engine

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

Brake power measured with dynamo meter

Go Brake Power = (pi*Pulley Diameter*(Engine Speed*60)*(Dead Weight-Spring Scale Reading))/60

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))

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)

Bmep given engine torque

Go Brake Mean Effective Pressure = (2*pi*Engine Torque*Engine Speed)/Mean Piston Speed

Combustion efficiency

Go Combustion Efficiency = Heat Added by Combustion per Cycle/(Mass of Fuel Added per Cycle*Heating Value of the Fuel)

Work done per cycle in ic engine

Go Work Done per Cycle in IC Engine = (Indicated Engine Power*Crankshaft Revolutions per Power Stroke)/Engine RPM

Intake air mass of engine cylinder

Go Mass of Air at Intake = (Air Mass Flow Rate*Crankshaft Revolutions per Power Stroke)/Engine RPM

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

Indicated mean effective pressure given mechanical efficiency

Go Indicated Mean Effective Pressure = Brake Mean Effective Pressure/Mechanical Efficiency of IC Engine

Frictional mean effective pressure

Go Frictional Mean Effective Pressure = Indicated Mean Effective Pressure-Brake Mean Effective Pressure

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

Actual intake air volume per cylinder

Go Actual Volume of Intake Air = Mass of Air at Intake/Air Density at Intake

Frictional power of engine

Go Frictional Power of Engine = Indicated Power-Brake Power

Horsepower of engine

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

Frictional power of engine Formula

Frictional Power of Engine = Indicated Power-Brake Power
FP = IP-BP

What is frictional power of engine?

The Friction Power formula is defined as the difference between the indicated power and brake power of an IC engine. The friction power is defined as the difference. between the power delivered to the piston while. the working fluid is contained within the cylinder, and the usable work delivered to the drive shaft.

How to Calculate Frictional power of engine?

Frictional power of engine calculator uses Frictional Power of Engine = Indicated Power-Brake Power to calculate the Frictional Power of Engine, The Frictional power of engine formula is defined as the power that is used to overcome the frictional resistance between piston and the cylinder walls. Frictional Power of Engine is denoted by FP symbol.

How to calculate Frictional power of engine using this online calculator? To use this online calculator for Frictional power of engine, enter Indicated Power (IP) & Brake Power (BP) and hit the calculate button. Here is how the Frictional power of engine calculation can be explained with given input values -> 138.07 = 140-1.93.

FAQ

What is Frictional power of engine?

The Frictional power of engine formula is defined as the power that is used to overcome the frictional resistance between piston and the cylinder walls and is represented as FP = IP-BP or Frictional Power of Engine = Indicated Power-Brake Power. Indicated power is the total power produced due to combustion of fuel within the IC engine's cylinder in one complete cycle neglecting any losses & Brake Power is the power available at the crankshaft.

How to calculate Frictional power of engine?

The Frictional power of engine formula is defined as the power that is used to overcome the frictional resistance between piston and the cylinder walls is calculated using Frictional Power of Engine = Indicated Power-Brake Power. To calculate Frictional power of engine, you need Indicated Power (IP) & Brake Power (BP). With our tool, you need to enter the respective value for Indicated Power & Brake Power 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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