Explanation of the main terms of diesel engine
1. Internal combustion engine: a heat engine in which fuel is burned inside the cylinder to convert thermal energy into mechanical energy.
2. Top dead center and bottom dead center: The position where the top surface of the piston in the cylinder is farthest from the centerline of the crankshaft is called the top dead center. Conversely, the position where the top surface of the piston in the cylinder is closest to the centerline of the crankshaft is called bottom dead center.
3. Piston stroke: the distance from the last dead point of the piston to the other dead point for quality inspection.
4. Combustion chamber and combustion chamber volume: When the piston is at the top dead center, the sum of the space between its top and the cylinder head is called the combustion chamber, and its volume is called the combustion chamber volume.
5. The total volume of the cylinder: when the piston is at the bottom dead center, the total space between it and the cylinder liner and cylinder head quality inspection is equal to the sum of the working volume and the volume of the combustion chamber, which is called the total volume of the cylinder.
6. The working volume of the cylinder: the volume of the cylinder through which the piston passes from the upper and lower dead centers, also called the piston displacement.
7. Compression ratio: the ratio of the total volume of the cylinder to the volume of the combustion chamber.