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US 2026/0177024 A1Published application
Pressure regulator valve for engine fuel system
AssigneeCummins Inc.
InventorsSandip V. Patil, Juilee V. Kale, Ross A. Phillips, Amol Jagannath Bobade
Life of this patent
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Abstract
A fuel system for an internal combustion engine includes a low pressure fuel pump and a pressure regulator valve. The pressure regulator valve is placed at the inlet to the low pressure fuel pump to regulate the fuel pressure and fuel flow in the system.
Claims20
A fuel system for an internal combustion engine, the fuel system comprising:
- a fuel pump having an inlet for receiving fuel from a fuel source, the fuel pump having an outlet for providing pressurized fuel;
- a bypass flow path extending from the outlet toward the inlet;
- and
- a pressure regulator valve connecting the bypass flow path to the inlet, wherein the pressure regulator valve includes:
- a fuel passage that fluidly connects the fuel source to the inlet of the fuel pump;
- and
- a plunger in the fuel passage, wherein the plunger is displaced by fuel pressure in the bypass flow path to close the fuel passage in the pressure regulator in response to the fuel pressure in the bypass flow path exceeding a threshold pressure.
4 more elements
A pressure regulator valve for a fuel pump, the pressure regulator valve comprising:
- a plunger;
- and
- a body that is elongated between a first end and an opposite second end, the body defining a fuel passage therein, and the plunger is located in the fuel passage, wherein the body includes:
- an opening at the first end, the opening configured to receive fuel from a fuel pump bypass flow path;
- a valve inlet to the fuel passage configured to receive fuel from a fuel source, the valve inlet located on a side of the body between the first end and the second end of the body;
- a valve outlet from the fuel passage configured to provide fuel from the fuel passage to the fuel pump, the valve outlet located on the side of the body between the first end and the second end of the body, wherein:
- the plunger is movable from a first position in the fuel passage toward a second position in the fuel passage in response to a pressurized fuel in the fuel pump bypass flow path;
- in the first position the plunger allows fuel from a fuel source to flow through the valve inlet into the fuel passage and through the valve outlet to the fuel pump;
- and
- in the second position the plunger is located in the fuel passage to block the valve inlet and obstruct fuel flow into the fuel passage from the fuel source.
7 more elements
Dependencies are inferred from the claim text.