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US 10,808,667 B2Granted
Fuel pump and outlet valve thereof
AssigneeDelphi Technologies IP Limited
InventorRobert B. Perry
Life of this patent
Estimating the term…
Abstract
An outlet valve includes an outlet valve housing with an outlet valve bore including an outlet valve seating surface. The outlet valve also includes an outlet valve member which moves within the outlet valve bore second portion between a closed position and an open position. A surface of the outlet valve bore guides the outlet valve member during movement between the closed position and the open position. The surface of the outlet valve bore and the outlet valve seating surface are provided on a continuous piece of material of the outlet valve housing. An outlet valve spring biases the outlet valve member toward the closed position and a retainer is fixed to the outlet valve housing which grounds the outlet valve spring to the outlet valve housing.
Claims16
An outlet valve for controlling outlet fuel flow of a fuel pump, said outlet valve comprising:
- an outlet valve housing extending from a first end to a second end along an outlet valve axis, said outlet valve housing having an outlet valve bore having an outlet valve bore first portion which extends toward said second end and said outlet valve bore also having an outlet valve bore second portion which extends from said second end to said outlet valve bore first portion such that an outlet valve seating surface is located within said outlet valve bore;
- an outlet valve member which moves within said outlet valve bore second portion between 1) a closed position in which said outlet valve member is seated with said outlet valve seating surface which prevents fluid communication from said outlet valve bore first portion to said outlet valve bore second portion and 2) an open position in which said outlet valve member is unseated with said outlet valve seating surface which permits fluid communication from said outlet valve bore first portion to said outlet valve bore second portion, wherein a surface of said outlet valve bore second portion guides said outlet valve member during movement between said closed position and said open position and wherein said surface of said outlet valve bore second portion and said outlet valve seating surface are provided on a continuous piece of material of said outlet valve housing;
- an outlet valve spring which biases said outlet valve member toward said closed position;
- and
- a retainer fixed to said outlet valve housing which grounds said outlet valve spring to said outlet valve housing;
- wherein said outlet valve housing includes an outlet aperture which extends radially outward from said outlet valve bore second portion to an outer peripheral surface of said outlet valve housing;
- wherein said outlet valve bore second portion terminates within said outlet valve housing at a shoulder which extends toward said outlet valve axis;
- wherein said outlet aperture intersects with said shoulder;
- and
- wherein said shoulder is a flat surface perpendicular to said outlet valve axis.
7 more elements
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;
- and
- an outlet valve comprising:
- an outlet valve housing extending from a first end to a second end along an outlet valve axis, said outlet valve housing having an outlet valve bore having an outlet valve bore first portion which extends toward said second end which is an inlet to said outlet valve from said pumping chamber such that said outlet valve bore first portion is in constant fluid communication with said pumping chamber and said outlet valve bore also having an outlet valve bore second portion which extends from said second end to said outlet valve bore first portion such that an outlet valve seating surface is located within said outlet valve bore;
- an outlet valve member which moves within said outlet valve bore second portion between 1) a closed position in which said outlet valve member is seated with said outlet valve seating surface which prevents fluid communication from said outlet valve bore first portion to said outlet valve bore second portion and 2) an open position in which said outlet valve member is unseated with said outlet valve seating surface which permits fluid communication from said outlet valve bore first portion to said outlet valve bore second portion, wherein a surface of said outlet valve bore second portion guides said outlet valve member during movement between said closed position and said open position and wherein said surface of said outlet valve bore second portion and said outlet valve seating surface are provided on a continuous piece of material of said outlet valve housing;
- an outlet valve spring which biases said outlet valve member toward said closed position;
- and
- a retainer fixed to said outlet valve housing which grounds said outlet valve spring to said outlet valve housing;
- wherein said outlet valve housing includes an outlet aperture which extends radially outward from said outlet valve bore second portion to an outer peripheral surface of said outlet valve housing;
- wherein said outlet valve bore second portion terminates within said outlet valve housing at a shoulder which extends toward said outlet valve axis;
- wherein said outlet aperture intersects with said shoulder;
- and
- wherein said shoulder is a flat surface perpendicular to said outlet valve axis.
11 more elements
Dependencies are inferred from the claim text.