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Brake Power of 4 Stroke is the output of the engine at the shaft measured by a dynamometer in a 4 stroke diesel engine. Check FAQs
P4b=ηmIMEPAL(N2)Nc60
P4b - Brake Power of 4 Stroke?ηm - Mechanical Efficiency?IMEP - Indicated Mean Effective Pressure?A - Piston Area?L - Stroke of Piston?N - RPM?Nc - Number of Cylinders?

Break Power given Bore and Stroke Example

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With units
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Here is how the Break Power given Bore and Stroke equation looks like with Values.

Here is how the Break Power given Bore and Stroke equation looks like with Units.

Here is how the Break Power given Bore and Stroke equation looks like.

5536.349Edit=0.733Edit6.5Edit0.166Edit600Edit(7000Edit2)2Edit60
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Break Power given Bore and Stroke Solution

Follow our step by step solution on how to calculate Break Power given Bore and Stroke?

FIRST Step Consider the formula
P4b=ηmIMEPAL(N2)Nc60
Next Step Substitute values of Variables
P4b=0.7336.5Bar0.166600mm(7000rad/s2)260
Next Step Convert Units
P4b=0.733650000Pa0.1660.6m(7000rad/s2)260
Next Step Prepare to Evaluate
P4b=0.7336500000.1660.6(70002)260
Next Step Evaluate
P4b=5536349W
LAST Step Convert to Output's Unit
P4b=5536.349kW

Break Power given Bore and Stroke Formula Elements

Variables
Brake Power of 4 Stroke
Brake Power of 4 Stroke is the output of the engine at the shaft measured by a dynamometer in a 4 stroke diesel engine.
Symbol: P4b
Measurement: PowerUnit: kW
Note: Value should be greater than 0.
Mechanical Efficiency
Mechanical Efficiency is measure of the effectiveness with which a mechanical system performs.
Symbol: ηm
Measurement: NAUnit: Unitless
Note: Value should be less than 1.
Indicated Mean Effective Pressure
Indicated Mean Effective Pressure can be thought of as the pressure that persists in the cylinder during the entirety of one cycle of the engine.
Symbol: IMEP
Measurement: PressureUnit: Bar
Note: Value should be greater than 0.
Piston Area
Piston Area is defined as the total space occupied by the piston of a diesel engine.
Symbol: A
Measurement: AreaUnit:
Note: Value should be greater than 0.
Stroke of Piston
Stroke of Piston is the distance that the piston travels between its top dead center (TDC) and bottom dead center (BDC) positions during each cycle of the engine.
Symbol: L
Measurement: LengthUnit: mm
Note: Value should be greater than 0.
RPM
RPM is speed in Rotation per Minute.
Symbol: N
Measurement: Angular VelocityUnit: rad/s
Note: Value should be greater than 0.
Number of Cylinders
Number of Cylinders is the number of cylinders present in the diesel engine.
Symbol: Nc
Measurement: NAUnit: Unitless
Note: Value should be greater than 0.

Other Formulas to find Brake Power of 4 Stroke

​Go Break Power of 4 Stroke Diesel Engine
P4b=2πτ(N2)60
​Go Break Power given Mechanical Efficiency and Indicated Power
P4b=ηmP4i

Other formulas in Diesel Engine Power Plant category

​Go Area of Piston given Piston Bore
A=(π4)B2
​Go Work Done per Cycle
W=IMEPAL

How to Evaluate Break Power given Bore and Stroke?

Break Power given Bore and Stroke evaluator uses Brake Power of 4 Stroke = (Mechanical Efficiency*Indicated Mean Effective Pressure*Piston Area*Stroke of Piston*(RPM/2)*Number of Cylinders)/60 to evaluate the Brake Power of 4 Stroke, The Break Power given Bore and Stroke formula is defined as the power output of an engine that is measured at the output shaft or crankshaft. It represents the actual usable power that the engine can deliver to do useful work, such as turning wheels in a vehicle or driving a generator. Brake Power of 4 Stroke is denoted by P4b symbol.

How to evaluate Break Power given Bore and Stroke using this online evaluator? To use this online evaluator for Break Power given Bore and Stroke, enter Mechanical Efficiency m), Indicated Mean Effective Pressure (IMEP), Piston Area (A), Stroke of Piston (L), RPM (N) & Number of Cylinders (Nc) and hit the calculate button.

FAQs on Break Power given Bore and Stroke

What is the formula to find Break Power given Bore and Stroke?
The formula of Break Power given Bore and Stroke is expressed as Brake Power of 4 Stroke = (Mechanical Efficiency*Indicated Mean Effective Pressure*Piston Area*Stroke of Piston*(RPM/2)*Number of Cylinders)/60. Here is an example- 5.536349 = (0.733*650000*0.166*0.6*(7000/2)*2)/60.
How to calculate Break Power given Bore and Stroke?
With Mechanical Efficiency m), Indicated Mean Effective Pressure (IMEP), Piston Area (A), Stroke of Piston (L), RPM (N) & Number of Cylinders (Nc) we can find Break Power given Bore and Stroke using the formula - Brake Power of 4 Stroke = (Mechanical Efficiency*Indicated Mean Effective Pressure*Piston Area*Stroke of Piston*(RPM/2)*Number of Cylinders)/60.
What are the other ways to Calculate Brake Power of 4 Stroke?
Here are the different ways to Calculate Brake Power of 4 Stroke-
  • Brake Power of 4 Stroke=(2*pi*Torque*(RPM/2))/60OpenImg
  • Brake Power of 4 Stroke=Mechanical Efficiency*Indicated Power of 4 StrokeOpenImg
  • Brake Power of 4 Stroke=(Brake Mean Effective Pressure*Piston Area*Stroke of Piston*(RPM/2)*Number of Cylinders)/60OpenImg
Can the Break Power given Bore and Stroke be negative?
No, the Break Power given Bore and Stroke, measured in Power cannot be negative.
Which unit is used to measure Break Power given Bore and Stroke?
Break Power given Bore and Stroke is usually measured using the Kilowatt[kW] for Power. Watt[kW], Milliwatt[kW], Microwatt[kW] are the few other units in which Break Power given Bore and Stroke can be measured.
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