Compression Ratio given Clearance and Swept Volume Calculator

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✖Swept volume is the volume between the top dead center (TDC) and bottom dead center (BDC).ⓘ Swept volume [V_s]			+10% -10%
✖The clearance volume is the volume remaining above the piston of an engine when it reaches top dead center.ⓘ Clearance volume [V_c]			+10% -10%

✖Compression ratio is ratio between volume of cylinder and combustion chamber.ⓘ Compression Ratio given Clearance and Swept Volume [r]

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Formula

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Compression Ratio given Clearance and Swept Volume

Formula

`"r" = 1+("V"_{"s"}/"V"_{"c"})`

Example

`"7.010204"=1+("1178cm³"/"196cm³")`

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Compression Ratio given Clearance and Swept Volume Solution

STEP 0: Pre-Calculation Summary

Formula Used

Compression Ratio = 1+(Swept volume/Clearance volume)
r = 1+(V_s/V_c)
This formula uses 3 Variables

Variables Used

Compression Ratio - Compression ratio is ratio between volume of cylinder and combustion chamber.
Swept volume - (Measured in Cubic Meter) - Swept volume is the volume between the top dead center (TDC) and bottom dead center (BDC).
Clearance volume - (Measured in Cubic Meter) - The clearance volume is the volume remaining above the piston of an engine when it reaches top dead center.

STEP 1: Convert Input(s) to Base Unit

Swept volume: 1178 Cubic Centimeter --> 0.001178 Cubic Meter (Check conversion here)
Clearance volume: 196 Cubic Centimeter --> 0.000196 Cubic Meter (Check conversion here)

STEP 2: Evaluate Formula

Substituting Input Values in Formula

r = 1+(V_s/V_c) --> 1+(0.001178/0.000196)

Evaluating ... ...

r = 7.01020408163265

STEP 3: Convert Result to Output's Unit

7.01020408163265 --> No Conversion Required

FINAL ANSWER

7.01020408163265 ≈ 7.010204 <-- Compression Ratio

(Calculation completed in 00.004 seconds)

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Home » Physics » IC Engine » Fundamentals of IC Engine » Compression Ratio given Clearance and Swept Volume

Credits

Created by Akshat Nama

Indian Institute of Information Technology, Design And Manufacturing (IIITDM ), Jabalpur

Akshat Nama has created this Calculator and 4 more calculators!

Verified by Prasana Kannan

Sri sivasubramaniyanadar college of engineering (ssn college of engineering), Chennai

Prasana Kannan has verified this Calculator and 10+ more calculators!

< 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

Compression Ratio given Clearance and Swept Volume Formula

Compression Ratio = 1+(Swept volume/Clearance volume)
r = 1+(V_s/V_c)

What is Compression Ratio ?

The compression ratio is the ratio between the volume of the cylinder and combustion chamber in an internal combustion engine at their maximum and minimum values.

How to Calculate Compression Ratio given Clearance and Swept Volume?

Compression Ratio given Clearance and Swept Volume calculator uses Compression Ratio = 1+(Swept volume/Clearance volume) to calculate the Compression Ratio, The Compression Ratio given Clearance and Swept Volume is the ratio of the total cylinder volume when the piston is at the bottom dead center to the clearance volume. Compression Ratio is denoted by r symbol.

How to calculate Compression Ratio given Clearance and Swept Volume using this online calculator? To use this online calculator for Compression Ratio given Clearance and Swept Volume, enter Swept volume (V_s) & Clearance volume (V_c) and hit the calculate button. Here is how the Compression Ratio given Clearance and Swept Volume calculation can be explained with given input values -> 7.010204 = 1+(0.001178/0.000196).

FAQ

What is Compression Ratio given Clearance and Swept Volume?

The Compression Ratio given Clearance and Swept Volume is the ratio of the total cylinder volume when the piston is at the bottom dead center to the clearance volume and is represented as r = 1+(V_s/V_c) or Compression Ratio = 1+(Swept volume/Clearance volume). Swept volume is the volume between the top dead center (TDC) and bottom dead center (BDC) & The clearance volume is the volume remaining above the piston of an engine when it reaches top dead center.

How to calculate Compression Ratio given Clearance and Swept Volume?

The Compression Ratio given Clearance and Swept Volume is the ratio of the total cylinder volume when the piston is at the bottom dead center to the clearance volume is calculated using Compression Ratio = 1+(Swept volume/Clearance volume). To calculate Compression Ratio given Clearance and Swept Volume, you need Swept volume (V_s) & Clearance volume (V_c). With our tool, you need to enter the respective value for Swept volume & Clearance volume 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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