Fuel system pressure relief valve with integral accumulator
AssigneeFord Global Technologies, LLC
InventorsGary Barylski, Scott DeRaad
Life of this patent
Estimating the term…
Abstract
A fuel pressure relief system in an engine fuel system having a fuel line is shown. In one example, the system has a pressure relief valve in the fuel line; and a pressure relief assembly coupled to the relief valve, the assembly having an accumulator in communication with the engine side of the fuel line at least during engine off conditions.
Claims15
A fuel pressure relief system in an engine fuel system having a fuel line comprising:
- a pressure relief valve in the fuel line;
- and
- a pressure relief assembly coupled to the relief valve, the assembly having an accumulator in communication with the engine side of the fuel line at least during engine off conditions.
A pressure relief valve in a high pressure fuel circuit comprising:
- an expandable volume coupled to pressure relief valve, said volume communicating with an engine side of said pressure relief valve;
- and
- a spring coupled to said expandable volume to control fuel pressure storage and release during engine off conditions.
A method of maintaining pressure in a fuel delivery system of an engine on a vehicle traveling on the road comprising:
- capturing expanding vapor volume in the fuel line of the engine in a pressure relief capsule coupled to the pressure relief mechanism while the pressure relief mechanism is closed;
- and
- releasing pressure from the pressure relief capsule when the fuel line is in need of pressure while the pressure relief mechanism is closed.
Dependencies are inferred from the claim text.