Patent ID: 6406278
Filing Date: 2002-06-18
Classification: F02M,F04B,Y10T

Abstract:
A high-pressure pump for feeding fuel to an internal combustion engine, comprising a body housing at least one cylinder in which a piston slides, a fuel compression chamber defined by said cylinder and said piston, said body defining a substantially cylindrical hole for housing a removable on-off valve, said hole including an inner axial portion having a predetermined diameter and an outer portion having a diameter larger then said predetermined diameter, a feed conduit provided in said body and communicating with said compression chamber and with the outer portion of said hole, said valve comprising a sleeve having inner and outer portions to be fitted in fluidtight manner inside the portions of said hole, a terminal opening of said feed conduit being located at said larger diameter portion, the outer portion of said sleeve having a radial opening, a cup-shaped shutter slidable in said sleeve and including at an outer end a flat wall defining a calibrated hole, said shutter being held by a compression spring in a rest position to close said radial opening, a flange integral with said sleeve and adapted to be secured removably to said body in an angular position so that said radial opening faces said terminal opening, said feed conduit being straight and sloping with respect to an axis of the hole on said body, wherein said larger diameter portion of the hole on said body being sized and said terminal opening being located to allow a drilling tool to drill said feed conduit through said larger diameter portion of the hole on said body.