Dieseltsükliks

Dieseltsükliks refers to the thermodynamic cycle that describes the workings of a diesel engine. It is an idealized cycle used to understand the efficiency and behavior of this type of internal combustion engine. The cycle consists of four main processes. It begins with an isentropic compression of air, where temperature and pressure increase without heat transfer. Following compression, heat is added at constant pressure, representing the injection and combustion of fuel. Next, there is an isentropic expansion of the combustion gases, which does work on the piston. Finally, heat is rejected at constant volume, returning the system to its initial state. The key difference between the diesel cycle and the Otto cycle (used in gasoline engines) is that in the diesel cycle, fuel is injected and burns during the first part of the expansion stroke, occurring at constant pressure, whereas in the Otto cycle, combustion is assumed to be instantaneous at constant volume. This constant-pressure heat addition phase is what distinguishes the diesel engine's operation and contributes to its characteristic properties.