PRECOMBUSTION CHAMBER. The precombustion chamber is a component used in certain types of internal combustion engines and is designed for preliminary formation and ignition of the air‑fuel mixture before the combustion process spreads to the main combustion chamber. This component is mainly used in diesel engines with a prechamber fuel injection system and in some specially designed gasoline engines. The primary function of the precombustion chamber is to create optimal conditions for reliable ignition of the fuel mixture. In diesel engines, fuel is injected into a small chamber called the precombustion chamber, where the initial ignition of the mixture occurs. The resulting flame then spreads through specially designed channels into the main combustion chamber of the cylinder, ensuring uniform and stable combustion of the fuel. This design improves mixture formation, reduces engine noise and provides a smoother combustion process. Structurally, the precombustion chamber is a specially shaped metal component installed in the cylinder head and connected to the main combustion chamber through channels or passages. The component is manufactured from heat‑resistant materials capable of withstanding high temperatures, pressure and the effects of combustion by‑products. Its design is intended for long‑term operation under significant thermal and mechanical loads. A properly functioning precombustion chamber ensures stable engine operation, improves fuel ignition and contributes to efficient combustion of the air‑fuel mixture. The catalog includes precombustion chambers designed for various types of diesel engines used in passenger vehicles, commercial transport and specialized machinery.