Diesel engine compression ratio - as we know that diesel engines do not use lighters (spark plugs) for combustion, but instead use the heat that occurs due to very high compressed air. Air is compressed then the temperature will increase. The appropriate character of diesel fuel is diesel fuel that will burn itself if the room temperature reaches a certain hot temperature. Then the ratio of diesel engine compression is very in a note.
The ratio of compression to an internal combustion engine or an outer combustion engine is a value that represents the ratio of the volume of the combustion chamber from the largest capacity to the smallest capacity. This is a fundamental specification for almost all general combustion engines.
In a piston engine, the ratio is the ratio between the volume of the cylinder and the combustion chamber when the piston is at the bottom dead point and the volume of the combustion chamber when the piston is at the top dead point.
The compression ratio refers to the volume or amount of air and fuel mixtures that the engine cylinder can accommodate when it is empty (at the largest space size) compared to the volume when the cylinder is pressed by the piston and has the smallest space size.
For example, the cylinder and combustion chamber with the piston below contains 1000 cc air. When the piston has moved to the top of the cylinder, and the volume remaining in the head or combustion chamber becomes 100 ccs, the compression ratio will be proportionally described as 1000: 100, or with a fractional reduction, 10:1 compression ratio.