Mean piston speed Solution

STEP 0: Pre-Calculation Summary
Formula Used
Mean Piston Speed = 2*Stroke Length*Engine Speed
sp = 2*L*N
This formula uses 3 Variables
Variables Used
Mean Piston Speed - (Measured in Meter per Second) - Mean Piston Speed is the average speed of the piston over one engine revolution.
Stroke Length - (Measured in Meter) - Stroke length is the distance travelled by piston in cylinder from BDC to TDC or vice versa.
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
Stroke Length: 15 Centimeter --> 0.15 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
sp = 2*L*N --> 2*0.15*418.879020457308
Evaluating ... ...
sp = 125.663706137192
STEP 3: Convert Result to Output's Unit
125.663706137192 Meter per Second --> No Conversion Required
FINAL ANSWER
125.663706137192 125.6637 Meter per Second <-- Mean Piston Speed
(Calculation completed in 00.004 seconds)

Credits

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22 Fundamentals of IC Engine Calculators

Overall heat transfer coefficient of IC engine
Go Overall Heat Transfer Coefficient = 1/((1/Heat Transfer Coefficient on Gas Side)+(Thickness of Engine Wall/Thermal conductivity of material)+(1/Heat Transfer Coefficient on Coolant Side))
Fuel Jet Velocity
Go Fuel jet velocity = Coefficient of Discharge*sqrt(((2*(Fuel injection pressure-Pressure of charge inside the cylinder))/Fuel Density))
Rate of convection heat transfer between engine wall and coolant
Go Rate of Convection Heat Transfer = Convection Heat Transfer Coefficient*Surface Area of Engine Wall*(Engine Wall Surface Temperature-Temperature of Coolant)
Mass of air taken in each cylinder
Go Mass of air taken in each cylinder = (Intake air pressure*(Clearance volume+Displaced volume))/([R]*Intake air temperature)
Heat transfer across engine wall given overall heat transfer coefficient
Go Heat Transfer across Engine Wall = Overall Heat Transfer Coefficient*Surface Area of Engine Wall*(Gas side temperature-Coolant Side Temperature)
Power produced by IC engine given work done by engine
Go Power produced by IC engine = Work done per operating cycle*(Engine speed in rps/Crankshaft revolutions per power stroke)
Engine displacement given number of cylinders
Go Engine Displacement = Engine bore*Engine bore*Stroke Length*0.7854*Number of Cylinders
Rate of cooling of engine
Go Rate of Cooling = Rate of Cooling Constant*(Engine Temperature-Engine surrounding Temperature)
Time taken for engine to cool
Go Time taken to cool Engine = (Engine Temperature-Final Engine Temperature)/Rate of Cooling
Engine rpm
Go Engine RPM = (Speed of vehicle in mph*Gear Ratio of Transmission*336)/Tire Diameter
Kinetic energy stored in flywheel of IC engine
Go Kinetic energy stored in the flywheel = (Flywheel moment of inertia*(Flywheel angular velocity^2))/2
Swept Volume
Go Swept volume = (((pi/4)*Inner Diameter of Cylinder^2)*Stroke Length)
Work done per operating cycle in IC engine
Go Work done per operating cycle = Mean effective pressure in pascals*Displacement volume of piston
Brake output per displacement of piston
Go Brake output per displacement = Brake power per cylinder per stroke/Displaced volume
Engine specific volume
Go Engine specific volume = Displaced volume/Brake power per cylinder per stroke
Brake specific power
Go Brake specific power = Brake power per cylinder per stroke/Area of Piston
Equivalence ratio
Go Equivalence ratio = Actual Air Fuel Ratio/Stoichiometric Air Fuel Ratio
Brake work per cylinder per stroke
Go Brake work per cylinder per stroke = Bmep*Displaced volume
Compression Ratio given Clearance and Swept Volume
Go Compression Ratio = 1+(Swept volume/Clearance volume)
Engine Capacity
Go Engine capacity = Swept volume*Number of Cylinders
Mean piston speed
Go Mean Piston Speed = 2*Stroke Length*Engine Speed
Peak torque of engine
Go Peak Torque of Engine = Engine Displacement*1.25

Mean piston speed Formula

Mean Piston Speed = 2*Stroke Length*Engine Speed
sp = 2*L*N

What is the purpose of mean piston speed?

The mean piston speed is the piston speed averaged over one engine revolution. A shorter stroke enables the engine to produce a higher rotating speed at a constant mean piston speed but also increases the speed at which the piston must travel in each revolution.

How to Calculate Mean piston speed?

Mean piston speed calculator uses Mean Piston Speed = 2*Stroke Length*Engine Speed to calculate the Mean Piston Speed, The Mean piston speed formula is defined as the distance traveled by a piston in a specified amount of time. Mean Piston Speed is denoted by sp symbol.

How to calculate Mean piston speed using this online calculator? To use this online calculator for Mean piston speed, enter Stroke Length (L) & Engine Speed (N) and hit the calculate button. Here is how the Mean piston speed calculation can be explained with given input values -> 125.6637 = 2*0.15*418.879020457308.

FAQ

What is Mean piston speed?
The Mean piston speed formula is defined as the distance traveled by a piston in a specified amount of time and is represented as sp = 2*L*N or Mean Piston Speed = 2*Stroke Length*Engine Speed. Stroke length is the distance travelled by piston in cylinder from BDC to TDC or vice versa & Engine Speed is the speed at which the crankshaft of the engine rotates.
How to calculate Mean piston speed?
The Mean piston speed formula is defined as the distance traveled by a piston in a specified amount of time is calculated using Mean Piston Speed = 2*Stroke Length*Engine Speed. To calculate Mean piston speed, you need Stroke Length (L) & Engine Speed (N). With our tool, you need to enter the respective value for Stroke Length & Engine Speed 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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