The piston and cylinder assembly K 55050 is a highly precise fuel metering component designed for the fuel injection pump system of the Sulzer ZV40/48 engine. Its primary function is to generate and regulate the high fuel pressure required for accurate fuel injection into the engine cylinders. Manufactured with extremely tight dimensional tolerances and finely finished contact surfaces, the piston and cylinder operate together to ensure efficient sealing, precise fuel delivery, and stable injection timing. Engineered to withstand continuous high-pressure operation, fuel exposure, vibration, and thermal loading, the assembly is produced from wear-resistant, high-strength materials suitable for demanding diesel engine environments. Proper interaction between the piston and cylinder is essential for maintaining combustion efficiency, fuel economy, and emission control. By supporting accurate fuel metering and reliable injection performance, the K 55050 assembly plays a critical role in overall engine efficiency and operational reliability.