What Are the Determining Factors of Engine Displacement?

[DeJocelyn]

Engine displacement is determined by the size of the engine cylinders and the number of cylinders. Below are the relevant explanations: 1. Definition of Displacement: Displacement (Swept-volume), a specialized term in hydraulic transmission, refers to the volume of fluid inhaled or expelled per stroke or cycle. Generally, a larger displacement means the engine releases more energy (converting chemical energy of fuel into mechanical energy) per unit time, resulting in better "power performance." Therefore, off-road vehicles and sports cars typically have relatively larger displacements. The working volume through which the piston moves from the top dead center to the bottom dead center is called the cylinder displacement; if the engine has multiple cylinders, the sum of the working volumes of all cylinders is called the engine displacement. It is usually expressed in liters (L). 2. Importance of Displacement: Engine displacement is one of the most important structural parameters, representing the size of the engine more accurately than cylinder diameter and number of cylinders. Many performance indicators of the engine are closely related to displacement.