Automotive fuel pump

Details Automotive fuel pump Automotive fuel pump

1991-02-19

1992-07-14

Bertsch, Richard A.

Pumps

Including separate port on noncyclic valve for venting or...

4174233, 4174235, 417251, 415 556, 415 557, F04B 3912

Patent

active

051297965

ABSTRACT:
In a fuel delivery apparatus including a canister in an automobile fuel tank, an electric fuel pump in the canister having two rotating elements from which three stages of pump operation are derived. A housing of the fuel pump has two cavities in which the two rotating elements are disposed. A first element has a web which divides the corresponding cavity into first and second stage pump chambers. The second element in the second cavity cooperates therewith in defining a third stage pump chamber. When the motor is on, vane pockets on one side of the web in the first pump chamber pump fuel from the fuel tank into the canister. Vane pockets on the other side of the web in the second pump chamber pump fuel from the canister to the third stage pump chamber. The second pump element pumps fuel into the interior of the fuel pump at a high pressure compatible with the requirements of internal combustion engine fuel injection systems. Vapor is separated from the fuel in the second stage pump chamber.

REFERENCES:
patent: 4449891 (1981-05-01), Kemmer
patent: 4776315 (1988-10-01), Greiner
patent: 4854830 (1989-08-01), Kozawa et al.
patent: 4865522 (1989-09-01), Radermacher
patent: 5039284 (1991-08-01), Talaski

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