Description
The NYF1 is a distributed power, hydraulic transmission diesel multiple unit developed by Sifang Works in 2001. Its development code was SFD13, and it was the first distributed power diesel multiple unit in China. The DMU employs hydraulic transmission, with two power cars forming a single unit, and utilizes a fixed formation. The power unit and auxiliary devices of the power cars are all arranged under the car body, with only the driver's cab and passenger compartments located above. The power car features a streamlined front end, a low-height drum-shaped body cross-section, and curved electrically controlled pneumatic plug doors. It uses a centralized independent power supply system and has full train air conditioning. Each power car is equipped with a Cummins QSK19-R horizontal diesel engine under the floor. The hydraulic transmission system utilizes a Japanese Niigata TACN33-3002 type gearbox. The auxiliary transmission system employs a hydrostatic system to drive the auxiliary generator and cooling devices. An AC screw pump is installed under the car. An auxiliary generator set, driven by a hydrostatic motor, provides power to the power cars. [2]
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China Ministry of Railway