Rail Injector 0445120199 0 445 120 199 4994541 0433172161 for BOSCH CUMMINS DONGFENG Truck YUTONG Bus High-pressure common rail pipe

The J5600-1111A00 High-Pressure Common Rail Tube Assembly is an original equipment (OE) fuel accumulator and distribution manifold used in Yuchai YC6J, YC6G, and other heavy-duty 6-cylinder diesel engines. As a core component of the common rail injection system, it stores high-pressure diesel at up to 2,000 bar (29,000 psi) and ensures uniform fuel pressure delivery to all six injectors—minimizing pressure fluctuations caused by pump pulsation or rapid injection cycles.

Manufactured from high-strength forged steel, this robust rail tube features six precision-threaded outlets, a pressure sensor port, and an over-pressure relief valve (limiting valve) port, enabling real-time monitoring and safety protection within the fuel system. It plays a vital role in maintaining stable combustion, reducing engine noise, improving fuel efficiency, and ensuring compliance with China V / China VI and Euro V emission standards.

Used across commercial trucks, coaches, and industrial machinery, this component must be handled with extreme care due to its sensitivity to contamination and the lethal hazard posed by high-pressure fuel spray.