| 摘要 |
<p>There are provided a plunger pump and method of controlling discharge of the pump capable of obtaining a desired compression rate, changing a discharge amount with ease without changing a stroke of the plunger and/or the inner diameter of a sliding hole of the plunger, and discharging a constant amount of fluid with accuracy while preventing the fluid from leaking. A plunger pump 1 has a cylinder 2 having an inlet 8 to suck a fluid and an outlet 10 to discharge the sucked fluid, a continuous hole 6 which is formed inside the cylinder 2 and communicated with the outlet 10, a plunger 4 which is inserted in the continuous hole 6 to be slidable and forms a pump chamber 20 to suck and discharge the fluid with the outlet 10 where the pump chamber 20 is formed between the plunger 4 and the outlet 10, and a fluid suction passage which is formed in the cylinder or the plunger, to suck a fluid into the pump chamber, wherein an opening 19 of the fluid suction passage 12 opened to the pump chamber 20 is opened and closed by the plunger 4 sliding inside the continuous hole 6.
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