9 (1) and the fuel port (intake / discharge port) where the upper end surface is exposed is opened, the plunger enters the barrel from the fuel chamber. When the plunger descends as shown in Fig. ![]() It consists of a delivery valve that prevents backflow and a control unit that controls the increase and decrease of fuel.įig. 5 (1), the pump body has a pump housing that forms the framework of the pump, a camshaft and tappet for driving the plunger, a plunger that weighs and pressurizes the fuel, and improves the cutoff of the injection. Row type injection pump bodyĪs shown in Fig. This time, we will explain the P-type row-type injection pump used in general medium-sized vehicles and large-sized vehicles. The A type is used for engines with a relatively small amount of spray, equipped with a vortex chamber type combustion chamber of a small car that does not require the transportation of heavy objects, so the pump body is open and the structure is as robust as the P type. It has a structure with excellent high pressure resistance and oil tightness resistance. Since the P type is used for engines with a large injection amount equipped with a direct spray combustion chamber for medium and large vehicles that carry heavy objects, the pump body is completely sealed, high pressure resistant and completely sealed.
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