Patent ID: 6186118
Filing Date: 2001-02-13
Classification: F02M,F04B

Abstract:
A fuel rail and pump comprising:a housing having a cylindrical cavity with a fluid inlet port;a piston having a crossectional area and being slidably disposed in said cavity;a rod secured with said piston and extending through one end of said cavity, said rod having a crossectional area substantially equal to one-half the crossectional area of said piston;a first chamber formed in said cavity between said piston and another end of said cavity in fluid communication with said inlet port;a second chamber formed in said cavity between said piston and said one end and enclosing a portion of said rod;a fuel rail surrounding a portion of said rod in said cavity adjacent said second chamber, said fuel rail having a plurality of fluid outlet ports disposed in fluid communication with said second chamber and being connected with respective fuel injectors of an internal combustion engine;means for reciprocating said rod; andvalve mechanisms secured on said piston for controlling fluid flow between said first chamber and said second chamber during reciprocation of said rod.