Friction Power Formula

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Friction Power is the power lost in an internal-combustion engine through friction between parts of the machine itself. Check FAQs
FP=IP-BP
FP - Friction Power?IP - Indicated Power?BP - Brake Power?

Friction Power Example

With values
With units
Only example

Here is how the Friction Power equation looks like with Values.

Here is how the Friction Power equation looks like with Units.

Here is how the Friction Power equation looks like.

0.35Edit=0.9Edit-0.55Edit
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Friction Power Solution

Follow our step by step solution on how to calculate Friction Power?

FIRST Step Consider the formula
FP=IP-BP
Next Step Substitute values of Variables
FP=0.9kW-0.55kW
Next Step Convert Units
FP=900W-550W
Next Step Prepare to Evaluate
FP=900-550
Next Step Evaluate
FP=350W
LAST Step Convert to Output's Unit
FP=0.35kW

Friction Power Formula Elements

Variables
Friction Power
Friction Power is the power lost in an internal-combustion engine through friction between parts of the machine itself.
Symbol: FP
Measurement: PowerUnit: kW
Note: Value should be greater than 0.
Indicated 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.
Symbol: IP
Measurement: PowerUnit: kW
Note: Value should be greater than 0.
Brake Power
Brake Power is the power available at the crankshaft.
Symbol: BP
Measurement: PowerUnit: kW
Note: Value should be greater than 0.

Other formulas in Important Formulas of Engine Dynamics category

​Go Beale Number
Bn=HPPSVpfe
​Go Swept Volume
Vs=(((π4)Dic2)L)
​Go Mean piston speed
sp=2LN
​Go Inlet-Valve Mach Index
Z=((DcDi)2)(spqfa)

How to Evaluate Friction Power?

Friction Power evaluator uses Friction Power = Indicated Power-Brake Power to evaluate the Friction Power, The Friction Power formula is defined as the difference between the indicated power and brake power of an IC engine. Friction Power is denoted by FP symbol.

How to evaluate Friction Power using this online evaluator? To use this online evaluator for Friction Power, enter Indicated Power (IP) & Brake Power (BP) and hit the calculate button.

FAQs on Friction Power

What is the formula to find Friction Power?
The formula of Friction Power is expressed as Friction Power = Indicated Power-Brake Power. Here is an example- 0.00035 = 900-550.
How to calculate Friction Power?
With Indicated Power (IP) & Brake Power (BP) we can find Friction Power using the formula - Friction Power = Indicated Power-Brake Power.
Can the Friction Power be negative?
No, the Friction Power, measured in Power cannot be negative.
Which unit is used to measure Friction Power?
Friction Power is usually measured using the Kilowatt[kW] for Power. Watt[kW], Milliwatt[kW], Microwatt[kW] are the few other units in which Friction Power can be measured.
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