Multiple pump fuel system
AssigneeWalbro Corporation
InventorsEdward J. Talaski, Elton J. Fisch
Life of this patent
Estimating the term…
Abstract
In at least some implementations, a fuel pump assembly includes a first fuel pump and a second fuel pump that each have an electric motor, a pumping element driven by the motor, an inlet and an outlet through which fuel is discharged. The assembly also includes a passage communicated with the outlet of the first fuel pump and with the outlet of the second fuel pump, a fuel outlet in communication with the passage and through which fuel exits the fuel pump assembly, and a valve having an inlet in communication with the passage between the outlet of the first fuel pump and the outlet of the second fuel pump. The valve also having an outlet through which fuel exits the passage and a valve body that controls fuel flow through the valve.
Claims15
A fuel pump assembly, comprising:
- a first fuel pump having an electric motor, a pumping element that is driven by the motor, an inlet through which fuel enters the first fuel pump and an outlet through which fuel is discharged from the first fuel pump;
- a second fuel pump having an electric motor, a pumping element that is driven by the motor, an inlet through which fuel enters the second fuel pump and an outlet through which fuel is discharged from the second fuel pump;
- a passage communicated with the outlet of the first fuel pump and with the outlet of the second fuel pump;
- a fuel outlet in communication with the passage and through which fuel exits the fuel pump assembly;
- a first valve having an inlet in communication with the passage between the outlet of the first fuel pump and the outlet of the second fuel pump, the valve also having an outlet through which fuel exits the passage and a valve body that controls fuel flow through the valve;
- and
- a second valve located between the outlet of the first fuel pump and the first valve, wherein the second valve prevents fuel that is discharged from the first fuel pump from reaching the first valve.
A fuel pump assembly, comprising:
- a first fuel pump having an electric motor, a pumping element that is driven by the motor, an inlet through which fuel enters the first fuel pump, a first outlet through which fuel is discharged from the first fuel pump and a second outlet through which fuel is discharged from the first fuel pump;
- a second fuel pump having an electric motor, a pumping element that is driven by the motor, an inlet through which fuel enters the second fuel pump and an outlet through which fuel is discharged from the second fuel pump;
- a passage communicated with the first outlet of the first fuel pump and with the outlet of the second fuel pump;
- a fuel outlet in communication with the passage and through which fuel exits the fuel pump assembly;
- and
- a valve having an inlet in communication with the second outlet of the first fuel pump, an outlet through which fuel exits the valve, and a valve body that controls fuel flow through the valve, wherein when the valve body is closed to inhibit or prevent fuel flow through the valve, more fuel exits the first fuel pump through the first outlet.
Dependencies are inferred from the claim text.