diiseltsükli

The diiseltsükkel, commonly known as the diesel cycle, is a thermodynamic cycle that describes the function of a typical diesel engine. It is an idealized process used to model the combustion process within a diesel engine. The cycle consists of four distinct stages. It begins with an intake stroke where air is drawn into the cylinder. This is followed by a compression stroke where the air is compressed adiabatically to a high temperature and pressure. Unlike the Otto cycle, fuel is injected into the cylinder at the beginning of the combustion phase, which occurs at approximately constant pressure. This injection and subsequent combustion is considered the heat addition process. The mixture then expands adiabatically, doing work on the piston, which is the power stroke. Finally, an exhaust stroke expels the burnt gases from the cylinder, representing the heat rejection phase at constant volume. The efficiency of the diiseltsükkel is dependent on the compression ratio and the cutoff ratio, which is the ratio of the volume at the end of combustion to the volume at the beginning of combustion. Higher compression ratios generally lead to greater efficiency, although practical limitations exist. The diesel cycle is a fundamental concept in understanding the operation and theoretical performance of diesel engines.