In-take fuel pump assembly with unitary control unit for interna

Details In-take fuel pump assembly with unitary control unit for interna In-take fuel pump assembly with unitary control unit for interna

1996-07-29

1999-10-05

Freay, Charles G.

Pumps

Condition responsive control of pump drive motor

By control of electric or magnetic drive motor

417 449, 4174233, 41742314, 4174104, F04B 4906, F04B 3504

Patent

active

059612932

ABSTRACT:
An in-tank fuel pump apparatus includes an elongated motor-pump unit having a motor and pump unit connected in end-to-end relation. An outer cam has a substantially constant diameter enclosing the motor-pump unit and projecting axially outwardly therefrom and defining a control chamber immediately adjacent the one end of the motor-pump unit. A control tower is secured to the end of the motor-pump unit from which the motor cam extends. The control tower includes a body member having a closure plate abutting the motor pump unit, an outlet passageway extending axially from the motor-pump unit to the exterior of the motor cam, a pressure sensor secured within the body member having an inlet connected to a sensing passage connected to the output of the motor pump unit in an outermost circuit board forming the outermost end of the tower unit. An epoxy resin fills the unit about the several elements between the motor and the outer end of the cam and includes all voids within the tower structure to seal the control components against fuel and support the components as a single unitary assembly above the motor-pump unit. The tower is separately assembled as formed as a separate self-contained sub-assembly mounted within the outer housing and then with an epoxy resin introduced to fill the cavity and support all of the control, power and sensing components as a unitary complete control unit and outlet passage from the motor unit.

REFERENCES:
patent: 4756291 (1988-07-01), Cummins
patent: 4775917 (1988-10-01), Eichhorn et al.
patent: 4904162 (1990-02-01), Suzuki et al.
patent: 4926829 (1990-05-01), Tuckey
patent: 5040954 (1991-08-01), Iwai
patent: 5055758 (1991-10-01), Hock
patent: 5411376 (1995-05-01), Fournier et al.
patent: 5454697 (1995-10-01), Nakanishi
patent: 5593287 (1997-01-01), Sadakata et al.

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