The working stage of the plunger pump

When the plunger pump is working, the cam on the camshaft of the fuel injection pump and the plunger spring force the plunger to move back and forth, thereby completing the pumping task. The pumping process can be divided into the following three stages. Conclusion: Based on the above discussion, the following conclusions can be drawn: ① The total travel distance L of the reciprocating motion of the plunger remains unchanged and is determined by the lift of the cam. ② The amount of fuel supplied by the plunger in each cycle depends on the fuel supply stroke, which is variable and not controlled by the camshaft The start time of fuel supply does not change with the change of fuel supply stroke Turning the plunger can change the timing of the end of fuel supply, thereby changing the amount of fuel supplied. 3. The domestic series of plunger fuel injection pumps mainly include A, B, P, Z and series I, II, III, etc. Serialization is based on the different fuel supply requirements of a diesel engine's single cylinder power range. It is based on the plunger stroke, pump cylinder center distance, and structural type, and then combined with different sizes of plunger diameters to form several types of fuel injection pumps with varying fuel supply in one working cycle, to meet the needs of various diesel engines. The working principle and structural type of the domestically produced series of fuel injection pumps are basically the same. Taking the A-type pump as an example, this article introduces the structure and working principle of the plunger type fuel injection pump. The plunger pump consists of four main parts: a sub pump, an oil quantity adjustment mechanism, a transmission mechanism, and a pump body

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