Patent ID: 11891969
Assignee: AISAN KOGYO KABUSHIKI KAISHA
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F  B  Y | IPC B  F

Claim 4:
5. A fuel-feeding device, comprising:
a fuel tank storing fuel therein;
a fuel pump configured to feed the fuel in the fuel tank to an engine through a fuel-feeding conduit extending from the fuel tank;
an aspirator disposed along a branched conduit extending from the fuel-feeding conduit, wherein the aspirator is configured to generate a negative pressure therein using a flow of the fuel flowing through the branched conduit from the fuel-feeding conduit;
a negative pressure sensor configured to detect the negative pressure generated by the aspirator; and
a control device configured to control a revolution speed of the fuel pump,
wherein the control device is configured to determine that when the negative pressure detected by the negative pressure sensor is reduced to a level lower than a predetermined negative pressure, such a reduction of the detected negative pressure is a sign of vapor generation in the fuel stored in the fuel tank.