Delphi Technologies IP Limited

Delphi International Operations Luxembourg S.a.r.l.

Toby J Pedley

Paul Francis Garland

Paul Buckley

Adam Tully

Matthew Fairbairn

A pump body of a high pressure fuel pump defines a compression chamber in fluid communication with a first recess dug in a first outer face. A second recess is dug in a second outer face of the body. An inlet channel opens in a conduit extending between the first recess and the second recess.

Fuel pump

A high pressure fuel pump includes a pumping head and a plunger slidably adjusted in a bore. The plunger is provided with a blind bore defining a chamber open in the head end of the plunger and in fluid communication with the compression chamber, the end face of the plunger being limited to a peripheral annular face surrounding the opening, the bore further defining a peripheral cylindrical wall and a bottom face. A filler member is arranged inside the chamber.

High pressure fuel pump

A high pressure fuel pump includes a pump head from which extends a turret, a bore extends along a main axis from a pumping chamber through the turret to an open end. A piston is arranged in the bore and protrudes out of the turret, an outer extremity being provided with a cam follower. A spring is arranged around the piston and slipped over the turret, the spring is compressed between the cam follower and the main part of the pump head. A cup shaped sleeve is arranged around the turret and defines a volume between the turret and the peripheral wall which fills with fuel that has leaked between the piston and the blind bore from the pumping chamber. A bottom face of the sleeve is provided with a hole through which the piston extends. An opening in the peripheral wall allows fuel to exit the volume.

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Toby J Pedley