1. Measure the Bore and Stroke:
* Bore: The diameter of the cylinder, measured in millimeters (mm) or inches (in).
* Stroke: The distance the piston travels from its highest to lowest point, also measured in millimeters (mm) or inches (in).
2. Calculate the Cylinder Volume:
* Formula: Cylinder Volume = (π/4) * Bore² * Stroke
* π (pi) is a mathematical constant approximately equal to 3.14159
3. Multiply by the Number of Cylinders:
* Engine Capacity = Cylinder Volume * Number of Cylinders
Example:
Let's say an engine has:
* Bore: 80 mm
* Stroke: 85 mm
* Number of Cylinders: 4
Calculation:
1. Cylinder Volume: (π/4) * 80² * 85 = 427,263.6 mm³
2. Engine Capacity: 427,263.6 mm³ * 4 = 1,709,054.4 mm³
Units and Conversion:
* Engine capacity is usually expressed in cubic centimeters (cc) or liters (L).
* 1 cc = 1 cm³
* 1 L = 1000 cc
Therefore, the engine capacity in the example is 1709 cc or 1.709 L.
Important Note:
* Engine capacity is not the same as engine power. A larger engine capacity doesn't automatically mean a more powerful engine. Other factors like engine design, compression ratio, and turbocharging influence engine power.
* Engine capacity is often used as a way to categorize engines by their size, and is sometimes referred to as "engine size."
