Statically sealed high pressure fuel pump and method

A method of statically sealing a fuel pump, comprising the steps:

• providing a fuel pump, wherein said fuel pump has a pump body;
• forming a fuel reservoir within said pump body, wherein said fuel reservoir is capable of holding fuel and having an opening for migrating fuel;
• and
• attaching a bellows to said pump body in communication with said opening, wherein said bellows is a stretchable membrane acting as a static seal.

A self-contained, direct injection, high pressure fuel pump for use independent of engine oil comprising:

• a pump body defining a cavity, bore, and one-way by-pass;
• a static diaphragm seal separating said cavity into a gasoline reservoir adapted to contain gasoline and a working fluid reservoir adapted to contain working fluid independent of said engine oil;
• a piston translatable in said bore with respect to said pump body to exert a sufficient force on working fluid in said working fluid reservoir to transmit work to gasoline in said gasoline reservoir via said static diaphragm;
• a bellows in a sealing relationship at one end of said bellows to said pump body for working fluid flow communication with said bore and said by-pass and sufficiently in a sealing relationship at the other end of said bellows to said piston to create a statically sealed area between said body, diaphragm, and bellows;
• whereby translation of said piston in one direction transmits work to said gasoline via said diaphragm during which working fluid migrates into said bellows through said bore distending said bellows;
• and
• whereby translation of said piston in the opposite direction facilitates the contraction of said bellows sufficiently to return the migrated working fluid to said working fluid reservoir through said one way by-pass.