The invention provides a unit common-rail pump
assembly for a single cylinder diesel. The unit common-rail pump
assembly for the single cylinder diesel comprises a pump body, a main
valve seat detachably connected with the pump body, and an oil inlet structure arranged on the main
valve seat, wherein a low-pressure oil cavity communicating with the oil inlet structure is arranged in the main valveseat; a proportional
electromagnetic valve for controlling the oil inlet amount of the oil inlet structure is arranged in the low-pressure oil cavity; a
pump head part communicating with the low-pressure oil cavity and used for oil inlet conveying control is arranged on the pump body; a
plunger sleeve connected with the
pump head part is arranged on the pump body and is provided with a high-pressure oil cavity communicating with an oil inlet cavity and an oil outlet cavity of the
pump head part so as to push oil into the oil outlet cavity; a
plunger movably connected with the inner wall of the
plunger sleeve and used for providing a pushing force is arranged in the high-pressure oil cavity, and is connected with a
drive shaft; and the pump head part is connected with an external oil
pipe.Through the unit common-rail pump
assembly for the single cylinder diesel provided by the invention, the production cost can be effectively reduced, and the reliability and the service life are improved.