FUEL PUMP HOUSING

摘要

According to a first aspect of the present invention there is provided a fuel pump housing for use in a fuel pump of a common rail fuel injection system in a vehicle engine, the fuel pump housing comprising a pumping chamber and a drilling intersecting the pumping chamber at an opening, wherein the pumping chamber is substantially spherical, wherein the drilling transitions into the pumping chamber at a transition region of progressively increasing diameter, and wherein the transition region and the spherical pumping chamber are configured such that, when the fuel pump housing is in use, a peak stress in the fuel pump housing is at a location that is spaced away from the opening.