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Fuel pump is designed to provide a kind of simple structure, good emulsification effect, both supercharging fuel pump, and fuel in internal combustion engine in the case of not adding emulsifier can achieve emulsification and supply. Adopts the following technical scheme: the fuel pump include: outer shell, inner cavity of the shell that product by the baffle plate is divided into from top to bottom, interconnected rotor room, back room and emulsion chamber; Top products of the rotor chamber is equipped with inlet, the product of the back room equipped with water inlet, the product of emulsification room is equipped with the oil outlet; Placed on the rotor motor, motor stator pole indoor wall, motor rotor installed on the product in the rotor indoor, motor spindle through reflux after chamber to the emulsion chamber; Impeller, installed on the emulsion chamber and fixed on the product of motor spindle; The product has some hole on the impeller blades.

Fuel common rail system of the high pressure fuel pump, it has be directed in the pump cylinder, piston pump, the pump cylinder, in which the direct product of the gap area of piston pump, fuel oil for lubrication and necessary for cooling structure have flowed through at least one hole connected to the first pressure above the level into the slot and by at least a discharge hole connected to the second pressure below the level of the outflow of groove, among them, the outflow at the bottom of the groove of the upper edge of the product and the product at the top of the bottom edge of the flow into the tank structure between pump piston guide piece for product, and which leads to the top of the flow into the slots into the holes or each flow into the hole and the bottom edge of the flow into the slot at the top of the adjacent land into the top of the product into the slot.