Valve system of vehicle fuel pump
AssigneesHyundai Motor Company, Kia Motors Corporation
InventorsKeun Soo Kim, Jung Hoon Park, Dong Hyun Kim
Life of this patent
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Abstract
A valve system of a vehicle fuel pump includes: a reservoir cup disposed within a fuel tank storing fuel in the reservoir cup; a fuel pump configured to pump fuel from the reservoir cup to the engine while supplying fuel to a jet pump through a first discharge port; a jet pump configured to charge the reservoir cup with fuel by drawing fuel from the fuel tank by using a pressure of fuel supplied by the fuel pump; and a jet pump control valve disposed on the first discharge port and configured to control a flow of fuel discharged from the fuel pump to the jet pump.
Claims10
A valve system of a vehicle fuel pump, the valve system comprising:
- a reservoir cup disposed within a fuel tank storing fuel in the reservoir cup;
- a fuel pump configured to pump fuel from the reservoir cup to the engine while supplying fuel to a jet pump through a first discharge port;
- a jet pump configured to charge the reservoir cup with fuel by drawing fuel from the fuel tank by using a pressure of fuel supplied by the fuel pump;
- and
- a jet pump control valve disposed on the first discharge port and configured to control a flow of fuel discharged from the fuel pump to the jet pump,
- wherein, when the engine is on and a pressure of fuel discharged from the fuel pump to the engine is increased to reach a first set pressure, the jet pump control valve opens a jet pump flow path connecting the jet pump and the first discharge port of the fuel pump, and
- wherein, when the engine is off and the pressure of fuel discharged from the fuel pump to the jet pump is reduced to reach a second set pressure determined to be smaller than the first set pressure, the jet pump control valve closes the jet pump flow path.
Dependencies are inferred from the claim text.