What is the main purpose of the stroke measurement in an engine?

The main purpose of stroke measurement in an engine is to measure piston travel distances. In an internal combustion engine, the stroke refers to the distance the piston moves within the cylinder from its lowest point (bottom dead center) to its highest point (top dead center). This measurement is critical as it directly influences the engine's displacement, which is a key factor in determining the engine's power and efficiency.

Understanding stroke aids in the design and operation of the engine, as it helps engineers calculate the total volume of air-fuel mixture that can be drawn into the cylinders during each cycle, thereby influencing engine performance characteristics such as torque and power output. Additionally, knowing the stroke distance is essential for tuning the engine and ensuring proper valve timing and clearance.