Bosch DLLA145P771 Fuel Injector Nozzle Assembly

The Bosch DLLA145P771 is a common rail fuel injector nozzle assembly designed for high-pressure direct injection diesel engines. It features a 145-degree spray angle optimized for the combustion chamber geometry of the Cummins K50 engine platform. The nozzle body and needle valve are manufactured from high-speed tool steel to withstand extreme injection pressures and cyclic thermal loads. This component serves as a critical wear part within the fuel injection system, ensuring precise fuel metering and atomization for efficient combustion and emissions compliance. It is applied in Dongfeng Tianlong flagship heavy-duty trucks equipped with Cummins K50 powerplants.