Author: Мусабеков, Закиржон Эргашевич; Равшанов, Насимбек Қодир ўғли

Annotation: The diagram of changes in the pressure of gases in the engine cylinder, depending on the change in the volume or angle of rotation of the crankshaft, recorded by the indicator, is called the engine indicator diagram. Under operating conditions, an automobile engine operates primarily at partial load conditions. For these modes, the analysis is carried out in order to determine the conditions under which stable engine operation is achieved with the greatest efficiency at each speed mode with the lowest toxicity. The value of each of the effective indicators is determined by the value of the corresponding indicator indicator and mechanical efficiency.

Keywords: efficiency, diagram of a four-stroke naturally aspirated diesel engine, maximum indicator values