Fuel delivery system containing high pressure pump with isolation valves
AssigneesDenso Corporation, DENSO International America, Inc.
InventorsDhyana Ramamurthy, Steve Roseborsky
Life of this patent
Estimating the term…
Abstract
A fuel delivery system including a high pressure fuel pump assembly. The assembly includes first and second output fuel paths each in communication with a fuel pump chamber. A main pressure relief fuel path is in communication with the fuel pump chamber and includes a pressure relief valve. A first relief fuel path is in communication with both the first output fuel path and the main pressure relief fuel path. A second relief fuel path is in communication with both the second output fuel path and the main pressure relief fuel path. The first and the second relief fuel paths are configured to restrict fuel flow therethrough between the first and the second output fuel paths.
Claims20
A fuel delivery system including a high pressure fuel pump assembly comprising:
- first and second output fuel paths each in communication with a fuel pump chamber;
- a main pressure relief fuel path in communication with the fuel pump chamber and including a pressure relief valve;
- a first relief fuel path in communication with both the first output fuel path and the main pressure relief fuel path;
- and
- a second relief fuel path in communication with both the second output fuel path and the main pressure relief fuel path;
- wherein the first and the second relief fuel paths are configured to restrict fuel flow therethrough between the first and the second output fuel paths.
A fuel delivery system including a high pressure fuel pump assembly comprising:
- a fuel pump chamber;
- a main fuel path in communication with the fuel pump chamber;
- a first output fuel path in communication with the main fuel path and including a first valve;
- a second output fuel path in communication with the main fuel path and including a second valve;
- a main pressure relief fuel path in communication with the fuel pump chamber and including a main relief valve;
- a first relief fuel path in communication with both the first output fuel path and the main pressure relief fuel path, the first relief fuel path including a first relief valve;
- and
- a second relief fuel path in communication with both the second output fuel path and the main pressure relief fuel path, the second relief fuel path including a second relief valve;
- wherein:
- the first relief valve restricts fuel from flowing from the first output fuel path to the second output fuel path;
- and
- the second relief valve restricts fuel from flowing from the second output fuel path to the first output fuel path.
A fuel delivery system comprising:
- a fuel pump housed within a fuel pump chamber;
- a main fuel path in communication with the fuel pump chamber;
- a first output fuel path in communication with the main fuel path;
- a second output fuel path in communication with the main fuel path;
- a first fuel rail configured to receive fuel from the first output fuel path and deliver fuel to a plurality of first fuel injectors;
- a second fuel rail configured to receive fuel from the second output fuel path and deliver fuel to a plurality of second fuel injectors;
- a main pressure relief fuel path in communication with the fuel pump chamber and including a pressure relief valve;
- a first relief fuel path in communication with both the first output fuel path and the main pressure relief fuel path;
- and
- a second relief fuel path in communication with both the second output fuel path and the main pressure relief fuel path;
- wherein:
- the first and the second relief fuel paths each provide an individual fuel path between the first and the second output fuel paths respectively, and the main pressure relief fuel path including the pressure relief valve;
- the first relief fuel path restricts fuel flow therethrough to the first output fuel path;
- and
- the second relief fuel path restricts fuel flow therethrough to the second output fuel path.
Dependencies are inferred from the claim text.