{
  "abstract": "A novel fuel pumpflow channel passage structure, which comprises an adapter, an air vent valve and a sealing plug, wherein the adapter comprises a body, an input end and an output end; the input end is communicated with the output end through the body; both the input end and the output end have cylindrical inner wall surfaces roughly varying in axial diameters; the input end and the output end define an input pipeline and an output pipeline along the cylindrical inner wall surfaces; the body is provided with an air vent hole and a through hole; the air vent valve is arranged on the air vent hole; and the sealing plug is arranged on the through hole.",
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  "source_date": "2026-04-21",
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  "title": "Fuel pump flow passage structure",
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