what is cubic displacement
Cubic displacement, also known as engine displacement or simply displacement, refers to the total volume of all the cylinders in an internal combustion engine. It is a measurement of the engine's capacity and is typically expressed in cubic centimeters (cc) or liters (L).
To calculate cubic displacement, you need to know two factors: the bore (diameter) and stroke (length of piston travel) of the engine.
Here's how you can calculate cubic displacement:
1. Find the bore: The bore is the diameter of each cylinder. You can find this information in the engine specifications or by measuring the diameter of the cylinders with a caliper.
2. Find the stroke: The stroke is the distance the piston travels from top dead center (TDC) to bottom dead center (BDC). This information can also be found in the engine specifications.
3. Calculate the displacement: The formula to calculate cubic displacement is:
Displacement = (π/4) × (bore^2) × stroke × number of cylinders
In this formula, π is a mathematical constant (approximately 3.14159). You'll need to use the value of π to perform the calculation.
For example, let's say you have a four-cylinder engine with a bore of 75 mm and a stroke of 90 mm.
Displacement = (3.14159/4) × (75^2) × 90 × 4
= 0.78539 × 5625 × 90 × 4
= 0.78539 × 202500 × 4
= 63363.621 cc
Therefore, the cubic displacement of the engine is 63363.621 cc or approximately 63.4 liters.
Keep in mind that cubic displacement is a crucial factor in determining an engine's power output and fuel efficiency, as larger displacement engines usually produce more power but may consume more fuel.