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US 10,502,138 B2Granted
Dual pump fuel system with pump sharing connection
AssigneeHamilton Sundstrand Corporation
InventorsCharles E. Reuter, Sara E. Pacella
Life of this patent
Estimating the term…
Abstract
A fuel system for an aircraft includes a main pump, a servo pump, a servo minimum pressure valve, and a servo pump bypass connection element. The main pump receives fuel from a source. The servo pump also receives fuel from the source. The servo minimum pressure valve receives fuel from the main pump supplied through a first line and the valve receives fuel from the servo pump supplied through a second line. The servo pump bypass connection element connects the first line and the second line.
Claims18
A fuel system for an aircraft, the fuel system comprising:
- a main pump that receives fuel from a source;
- a servo pump that receives fuel from the source;
- a servo minimum pressure valve comprising:
- a first opening for receiving fuel from the main pump;
- a second opening for receiving fuel from the servo pump;
- and
- a piston located between the first opening and the second opening and actuatable between an open position and a closed position, wherein the piston is configured to actuate towards the open position under a first operating condition wherein a pressure of the fuel supplied by the servo pump exceeds a pressure of the fuel supplied by the main pump,
- wherein the servo minimum pressure valve receives fuel from the main pump supplied through a first line and the servo minimum pressure valve receives fuel from the servo pump supplied through a second line;
- and
- a servo pump bypass connection element connecting the first line and the second line, such that during the first operating condition, fuel travels along the bypass connection element in a first direction from the first line to the second line, and during a second operating condition, the fuel travels along the bypass connection element in a second direction opposite the first direction from the second line to the first line.
7 more elements
A fluid management system comprising:
- a first pump in fluid communication with a fluid source;
- a second pump in fluid communication with the fluid source;
- a fluid dispensing nozzle in fluid communication with the first pump;
- an actuator in fluid communication with the second pump;
- a pressure valve comprising:
- a first opening in fluid communication with the first pump via a first line;
- and
- a second opening in fluid communication with the second pump via a second line;
- and
- a piston located between the first opening and the second opening and actuatable between an open position and a closed position, wherein the piston is configured to actuate towards the open position under a first operating condition wherein a pressure of the fluid supplied by the second pump exceeds a pressure of the fluid supplied by the first pump;
- and
- a pressure valve bypass connection element located near the first and second opening of the pressure valve and in fluid communication with the first pump and the second pump, via the first and second lines, respectively;
- wherein during the first operating condition, fluid travels along the bypass connection element in a first direction from the first line to the second line, and during a second operating condition, fluid travels along the bypass connection element in a second direction opposite the first direction from the second line to the first line.
10 more elements
Dependencies are inferred from the claim text.