Fuel pump and damper cup thereof
AssigneePhinia Jersey Holdings LLC
InventorsChad E. Uckermark, Youssef Kazour, John R. Grein
Life of this patent
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Abstract
A damper cup houses a pulsation damper of a fuel pump such that the damper cup defines a fuel volume together with a fuel pump housing of the fuel pump. The damper cup includes a sidewall which is annular in shape and which extends along a damper cup axis from a sidewall first end to a sidewall second end. The damper cup also includes an end wall which closes the sidewall second end, wherein the sidewall includes a support shoulder which is transverse to the damper cup axis and which is a segment of an annulus extending uninterrupted about the damper cup axis from a shoulder first end to a shoulder second end such that the shoulder first end and the shoulder second end are separated from each other by a gap which is uninterrupted.
Claims20
A fuel pump comprising:
- a fuel pump housing with a pumping chamber defined therein;
- a pumping plunger which reciprocates within a plunger bore along a plunger bore axis such that an intake stroke of said pumping plunger increases volume of said pumping chamber and a compression stroke of said pumping plunger decreases volume of said pumping chamber;
- a damper cup which defines an internal fuel volume together with said fuel pump housing, said damper cup having a sidewall which is annular in shape and which extends along a damper cup axis from a sidewall first end to a sidewall second end, said damper cup also having an end wall which closes said sidewall second end, wherein said sidewall includes an interior support shoulder which is transverse to said damper cup axis and which has an inner surface that is one segment of an annulus extending about said damper cup axis from a shoulder inner surface first end to a shoulder inner surface second end such that said shoulder inner surface first end and said shoulder inner surface second end are separated from each other by a single gap, the inner surface of the interior support shoulder being within said fuel volume;
- and
- a pulsation damper located within said fuel volume and defining a damping volume which is fluidly segregated from said fuel volume, said pulsation damper having at least one damper wall which is flexible in response to pressure pulsations within said fuel volume, wherein an outer periphery of said pulsation damper is supported by the inner surface of said interior support shoulder.
A damper cup for housing a pulsation damper of a fuel pump, wherein said damper cup defines an internal fuel volume together with a fuel pump housing of said fuel pump, said damper cup comprising:
- a sidewall which is annular in shape and which extends along a damper cup axis from a sidewall first end to a sidewall second end;
- and
- an end wall which closes said sidewall second end, wherein said sidewall includes an interior support shoulder which is transverse to said damper cup axis and which is one segment of an annulus extending about said damper cup axis from a shoulder inner surface first end to a shoulder inner surface second end such that said shoulder inner surface first end and said shoulder inner surface second end are separated from each other by a single gap, the inner surface of the interior support shoulder being within said fuel volume.
A fuel pump comprising:
- a fuel pump housing with a pumping chamber defined therein;
- a pumping plunger which reciprocates within a plunger bore along a plunger bore axis such that an intake stroke of said pumping plunger increases volume of said pumping chamber and a compression stroke of said pumping plunger decreases volume of said pumping chamber;
- a damper cup which defines an internal fuel volume together with said fuel pump housing, said damper cup having a sidewall which is annular in shape and which extends along a damper cup axis from a sidewall first end to a sidewall second end, said damper cup also having an end wall which closes said sidewall second end, wherein said sidewall includes an interior support shoulder which is transverse to said damper cup axis and which has an inner surface that extends about said damper cup axis from a shoulder inner surface first end to a shoulder inner surface second end such that said shoulder inner surface first end and said shoulder inner surface second end are separated from each other by a single gap which extends from said shoulder inner surface first end to said shoulder inner surface second end;
- and
- a pulsation damper located within said fuel volume and defining a damping volume which is fluidly segregated from said fuel volume, said pulsation damper having at least one damper wall which is flexible in response to pressure pulsations within said fuel volume, wherein an outer periphery of said pulsation damper is supported by the inner surface of said interior support shoulder.
Dependencies are inferred from the claim text.