YC6J125Z-T20 Engine Oil Pump B3000-1011020A Suitable For Diesel Engines Parts

Oil suction and pressure

The suction and pressure of the fuel injection pump are completed by the reciprocating motion of the plunger in the plunger sleeve. When the plunger is in the lower position, the two oil holes on the plunger sleeve are opened, the inner cavity of the plunger sleeve is connected with the oil passage in the pump body, and the oil chamber is rapidly filled with fuel. When the cam is pushed onto the roller of the roller body, the plunger rises. Move upward from the beginning of the plunger until the oil hole is blocked by the upper end face of the plunger. During this period, due to the movement of the plunger, the fuel is squeezed out of the oil chamber and flows to the oil passage. Therefore, this lift is called pre stroke. When the plunger blocks the oil hole, the oil pressure process starts. When the plunger moves upward, the oil pressure in the oil chamber rises sharply. When the pressure exceeds the spring force of the outlet valve and the upper oil pressure, the outlet valve will be forced out, and the fuel will be pressed into the fuel pipe and sent to the fuel injector