FUEL PUMP FOR FUEL SYSTEM OF INTERNAL COMBUSTION ENGINE

摘要

PROBLEM TO BE SOLVED: To provide a fuel pump having the longest service life possible. SOLUTION: At least one end surface 64 or 65 of an insert 40 is prescribed and oriented with relation to size in such a way that a step part 46 in the insert 40 is loaded inward toward a ring shoulder part 44 in the axial direction by hydraulic pressure generated during operation. A material deformation part 52 comprising plastic material acts on the insert 40 only inward in the axial direction, so that load on the material deformation part 52 is reduced by the hydraulic pressure.