A fuel pump for use in a fuel injection system includes a housing at least one
piston defining a work chamber and drive means which put the piston into a reciprocating
motion in the chamber. An inlet conduit and an outlet conduit can be made to communicate
with the work chamber. A first valve device is provided between the inlet conduit
and the work chamber, and a second valve device is provided between the work chamber
and the outlet conduit. The valve element of one valve device has a guide portion,
which is received in a guide opening embodied in the valve element of the other
valve device, and the circumferential face of the guide portion and/or of the guide
opening has at least one recess, by which the contact area between the guide portion
and the guide opening is reduced.
